mod merge;
pub use merge::get_integration_review_merge_options;
use merge::merge_payload;
mod issue_creation;
pub use issue_creation::*;
mod issue_actions;
pub use issue_actions::*;
mod issue_comments;
pub use issue_comments::*;
mod boards;
pub use boards::*;
mod issues;
pub use issues::*;

use crate::git::load_stored_credential;
use reqwest::blocking::{Client, Response};
use reqwest::header::{ACCEPT, USER_AGENT};
use serde::{Deserialize, Serialize};
use std::collections::BTreeSet;
use std::time::Duration;

mod creation;
pub use creation::{create_integration_review_request, list_integration_repository_branches};

const PAGE_SIZE: usize = 100;
const REVIEW_REQUEST_TIMEOUT: Duration = Duration::from_secs(35);
const AZURE_PROJECT_WORKERS: usize = 8;

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct IntegrationRepository {
    pub id: String,
    pub name: String,
    pub full_name: String,
    pub description: String,
    pub clone_url: String,
    pub ssh_url: String,
    pub web_url: String,
    pub updated_at: String,
    pub private: bool,
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct IntegrationReviewRequest {
    pub id: String,
    pub number: u64,
    pub provider: String,
    pub repository_id: String,
    pub repository_name: String,
    pub title: String,
    pub description: String,
    pub author: String,
    pub state: String,
    pub source_branch: String,
    pub target_branch: String,
    pub web_url: String,
    pub created_at: String,
    pub updated_at: String,
    #[serde(default)]
    pub collaborators: Vec<String>,
    #[serde(default)]
    pub additions: Option<u64>,
    #[serde(default)]
    pub deletions: Option<u64>,
    #[serde(default)]
    pub changed_files: Option<u64>,
    #[serde(default)]
    pub merge_status: String,
    #[serde(default)]
    pub comments: Vec<IntegrationReviewComment>,
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct IntegrationReviewComment {
    pub id: String,
    pub author: String,
    pub body: String,
    pub created_at: String,
}

#[derive(Debug, Deserialize)]
struct GitLabProject {
    id: u64,
    name: String,
    path_with_namespace: String,
    #[serde(default)]
    description: Option<String>,
    http_url_to_repo: String,
    #[serde(default)]
    ssh_url_to_repo: String,
    #[serde(default)]
    web_url: String,
    #[serde(default)]
    last_activity_at: String,
    #[serde(default)]
    visibility: String,
}

#[derive(Debug, Deserialize)]
struct GitHubRepository {
    id: u64,
    name: String,
    full_name: String,
    #[serde(default)]
    description: Option<String>,
    clone_url: String,
    #[serde(default)]
    ssh_url: String,
    #[serde(default)]
    html_url: String,
    #[serde(default)]
    updated_at: String,
    #[serde(default)]
    private: bool,
}

#[derive(Debug, Deserialize)]
struct GiteaRepository {
    id: u64,
    name: String,
    full_name: String,
    #[serde(default)]
    description: String,
    clone_url: String,
    #[serde(default)]
    ssh_url: String,
    #[serde(default)]
    html_url: String,
    #[serde(default)]
    updated_at: String,
    #[serde(default)]
    private: bool,
}

#[derive(Debug, Deserialize)]
struct AzureRepositoryList {
    #[serde(default)]
    value: Vec<AzureRepository>,
}

#[derive(Debug, Deserialize)]
struct AzureRepository {
    id: String,
    name: String,
    project: AzureProject,
    #[serde(default, rename = "remoteUrl")]
    remote_url: String,
    #[serde(default, rename = "sshUrl")]
    ssh_url: String,
    #[serde(default, rename = "webUrl")]
    web_url: String,
}

#[derive(Debug, Deserialize)]
struct AzureProject {
    name: String,
}

fn integration_key(provider: &str, account_id: Option<&str>) -> Result<String, String> {
    if provider == "azure-devops" {
        if let Some(account_id) = account_id.filter(|value| !value.is_empty()) {
            if account_id.len() > 80
                || !account_id.chars().all(|character| {
                    character.is_ascii_alphanumeric() || matches!(character, '-' | '_')
                })
            {
                return Err("Invalid integration account identifier.".to_string());
            }
            if account_id != "default" {
                return Ok(format!("integration:{provider}:{account_id}"));
            }
        }
    }
    Ok(format!("integration:{provider}"))
}

fn client() -> Result<Client, String> {
    Client::builder()
        .connect_timeout(Duration::from_secs(7))
        .timeout(Duration::from_secs(15))
        .build()
        .map_err(|err| format!("Could not initialize the integration client: {err}"))
}

fn normalized_base_url(base_url: &str) -> Result<String, String> {
    let base_url = base_url.trim().trim_end_matches('/');
    if !(base_url.starts_with("https://") || base_url.starts_with("http://")) {
        return Err("The integration URL must start with http:// or https://.".to_string());
    }
    Ok(base_url.to_string())
}

fn github_api_base_url(base_url: &str) -> Result<String, String> {
    match normalized_base_url(base_url)?.to_ascii_lowercase().as_str() {
        "https://github.com" | "https://www.github.com" => Ok("https://api.github.com".to_string()),
        "https://api.github.com" => Ok("https://api.github.com".to_string()),
        _ => Err("The GitHub integration URL must be https://github.com.".to_string()),
    }
}

fn response_error(response: Response, provider: &str) -> String {
    let status = response.status();
    let detail = response.text().ok().and_then(|body| {
        serde_json::from_str::<serde_json::Value>(&body)
            .ok()
            .and_then(|value| {
                value
                    .get("message")
                    .or_else(|| value.get("error"))
                    .and_then(|value| value.as_str())
                    .map(str::to_string)
            })
    });
    match detail {
        Some(detail) if !detail.trim().is_empty() => {
            format!("{provider} returned {status}: {detail}")
        }
        _ => format!("{provider} returned {status}."),
    }
}

fn gitlab_repositories(
    client: &Client,
    base_url: &str,
    token: &str,
) -> Result<Vec<IntegrationRepository>, String> {
    let mut repositories = Vec::new();
    let mut page = 1usize;
    loop {
        let response = client
            .get(format!("{base_url}/api/v4/projects"))
            .header(USER_AGENT, "Gitty")
            .header(ACCEPT, "application/json")
            .header("PRIVATE-TOKEN", token)
            .query(&[
                ("membership", "true"),
                ("simple", "true"),
                ("order_by", "last_activity_at"),
                ("sort", "desc"),
                ("per_page", &PAGE_SIZE.to_string()),
                ("page", &page.to_string()),
            ])
            .send()
            .map_err(|err| format!("Could not reach GitLab: {err}"))?;
        if !response.status().is_success() {
            return Err(response_error(response, "GitLab"));
        }
        let next_page = response
            .headers()
            .get("x-next-page")
            .and_then(|value| value.to_str().ok())
            .unwrap_or("")
            .to_string();
        let projects = response
            .json::<Vec<GitLabProject>>()
            .map_err(|err| format!("GitLab returned an unreadable repository list: {err}"))?;
        repositories.extend(projects.into_iter().map(|project| IntegrationRepository {
            id: project.id.to_string(),
            name: project.name,
            full_name: project.path_with_namespace,
            description: project.description.unwrap_or_default(),
            clone_url: project.http_url_to_repo,
            ssh_url: project.ssh_url_to_repo,
            web_url: project.web_url,
            updated_at: project.last_activity_at,
            private: project.visibility == "private",
        }));
        if next_page.is_empty() {
            break;
        }
        page = next_page.parse().unwrap_or(page + 1);
    }
    Ok(repositories)
}

fn github_repositories(
    client: &Client,
    base_url: &str,
    token: &str,
) -> Result<Vec<IntegrationRepository>, String> {
    let api_base_url = github_api_base_url(base_url)?;
    let mut repositories = Vec::new();
    let mut page = 1usize;
    loop {
        let response = client
            .get(format!("{api_base_url}/user/repos"))
            .header(USER_AGENT, "Gitty")
            .header(ACCEPT, "application/vnd.github+json")
            .header("Authorization", format!("Bearer {token}"))
            .header("X-GitHub-Api-Version", "2026-03-10")
            .query(&[
                ("per_page", PAGE_SIZE.to_string()),
                ("page", page.to_string()),
                ("sort", "updated".to_string()),
                ("direction", "desc".to_string()),
            ])
            .send()
            .map_err(|err| format!("Could not reach GitHub: {err}"))?;
        if !response.status().is_success() {
            return Err(response_error(response, "GitHub"));
        }
        let page_repositories = response
            .json::<Vec<GitHubRepository>>()
            .map_err(|err| format!("GitHub returned an unreadable repository list: {err}"))?;
        let count = page_repositories.len();
        repositories.extend(page_repositories.into_iter().map(|repository| {
            IntegrationRepository {
                id: repository.id.to_string(),
                name: repository.name,
                full_name: repository.full_name,
                description: repository.description.unwrap_or_default(),
                clone_url: repository.clone_url,
                ssh_url: repository.ssh_url,
                web_url: repository.html_url,
                updated_at: repository.updated_at,
                private: repository.private,
            }
        }));
        if count < PAGE_SIZE {
            break;
        }
        page += 1;
    }
    Ok(repositories)
}

fn gitea_repositories(
    client: &Client,
    base_url: &str,
    token: &str,
) -> Result<Vec<IntegrationRepository>, String> {
    let mut repositories = Vec::new();
    let mut page = 1usize;
    loop {
        let response = client
            .get(format!("{base_url}/api/v1/user/repos"))
            .header(USER_AGENT, "Gitty")
            .header(ACCEPT, "application/json")
            .header("Authorization", format!("token {token}"))
            .query(&[
                ("limit", PAGE_SIZE.to_string()),
                ("page", page.to_string()),
                ("sort", "updated".to_string()),
            ])
            .send()
            .map_err(|err| format!("Could not reach Gitea: {err}"))?;
        if !response.status().is_success() {
            return Err(response_error(response, "Gitea"));
        }
        let page_repositories = response
            .json::<Vec<GiteaRepository>>()
            .map_err(|err| format!("Gitea returned an unreadable repository list: {err}"))?;
        let count = page_repositories.len();
        repositories.extend(page_repositories.into_iter().map(|repository| {
            IntegrationRepository {
                id: repository.id.to_string(),
                name: repository.name,
                full_name: repository.full_name,
                description: repository.description,
                clone_url: repository.clone_url,
                ssh_url: repository.ssh_url,
                web_url: repository.html_url,
                updated_at: repository.updated_at,
                private: repository.private,
            }
        }));
        if count < PAGE_SIZE {
            break;
        }
        page += 1;
    }
    Ok(repositories)
}

fn azure_repositories(
    client: &Client,
    base_url: &str,
    username: &str,
    token: &str,
) -> Result<Vec<IntegrationRepository>, String> {
    let response = client
        .get(format!("{base_url}/_apis/git/repositories"))
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/json")
        .basic_auth(username, Some(token))
        .query(&[("api-version", "7.1")])
        .send()
        .map_err(|err| format!("Could not reach Azure DevOps: {err}"))?;
    if !response.status().is_success() {
        return Err(response_error(response, "Azure DevOps"));
    }
    let repositories = response
        .json::<AzureRepositoryList>()
        .map_err(|err| format!("Azure DevOps returned an unreadable repository list: {err}"))?;
    Ok(repositories
        .value
        .into_iter()
        .map(|repository| IntegrationRepository {
            id: repository.id,
            full_name: format!("{}/{}", repository.project.name, repository.name),
            name: repository.name,
            description: String::new(),
            clone_url: repository.remote_url,
            ssh_url: repository.ssh_url,
            web_url: repository.web_url,
            updated_at: String::new(),
            private: true,
        })
        .collect())
}

fn value_string(value: &serde_json::Value, path: &[&str]) -> String {
    path.iter()
        .try_fold(value, |current, key| current.get(*key))
        .and_then(serde_json::Value::as_str)
        .unwrap_or_default()
        .to_string()
}

fn value_u64(value: &serde_json::Value, key: &str) -> u64 {
    value
        .get(key)
        .and_then(serde_json::Value::as_u64)
        .unwrap_or_default()
}

fn github_repository_name(repository_url: &str) -> String {
    let parts: Vec<_> = repository_url.trim_end_matches('/').split('/').collect();
    if parts.len() < 2 {
        return String::new();
    }
    format!("{}/{}", parts[parts.len() - 2], parts[parts.len() - 1])
}

fn parse_github_review(value: &serde_json::Value) -> Option<IntegrationReviewRequest> {
    let pull = value.get("pull_request")?;
    let number = value_u64(value, "number");
    let repository_url = value_string(value, &["repository_url"]);
    let state = if pull.get("merged_at").is_some_and(|item| !item.is_null()) {
        "merged"
    } else if value_string(value, &["state"]) == "open" {
        if value.get("draft").and_then(serde_json::Value::as_bool) == Some(true) {
            "draft"
        } else {
            "open"
        }
    } else {
        "closed"
    };
    Some(IntegrationReviewRequest {
        id: format!("github:{repository_url}:{number}"),
        number,
        provider: "github".to_string(),
        repository_id: repository_url.clone(),
        repository_name: github_repository_name(&repository_url),
        title: value_string(value, &["title"]),
        description: value_string(value, &["body"]),
        author: value_string(value, &["user", "login"]),
        state: state.to_string(),
        source_branch: String::new(),
        target_branch: String::new(),
        web_url: value_string(value, &["html_url"]),
        created_at: value_string(value, &["created_at"]),
        updated_at: value_string(value, &["updated_at"]),
        collaborators: Vec::new(), additions: None, deletions: None, changed_files: None, merge_status: String::new(), comments: Vec::new(),
    })
}

fn parse_gitlab_review(value: &serde_json::Value, provider: &str) -> IntegrationReviewRequest {
    let number = value_u64(value, "iid");
    let project_id = value.get("project_id").map_or_else(String::new, |id| {
        id.as_u64().map_or_else(
            || id.as_str().unwrap_or_default().to_string(),
            |id| id.to_string(),
        )
    });
    let reference = value_string(value, &["references", "full"]);
    let repository_name = reference
        .rsplit_once('!')
        .map_or(reference.clone(), |(name, _)| name.to_string());
    let raw_state = value_string(value, &["state"]);
    let draft = value.get("draft").and_then(serde_json::Value::as_bool) == Some(true)
        || value
            .get("work_in_progress")
            .and_then(serde_json::Value::as_bool)
            == Some(true);
    let state = match raw_state.as_str() {
        "opened" if draft => "draft",
        "opened" => "open",
        "merged" => "merged",
        _ => "closed",
    };
    IntegrationReviewRequest {
        id: format!("{provider}:{project_id}:{number}"),
        number,
        provider: provider.to_string(),
        repository_id: project_id,
        repository_name,
        title: value_string(value, &["title"]),
        description: value_string(value, &["description"]),
        author: value_string(value, &["author", "name"]),
        state: state.to_string(),
        source_branch: value_string(value, &["source_branch"]),
        target_branch: value_string(value, &["target_branch"]),
        web_url: value_string(value, &["web_url"]),
        created_at: value_string(value, &["created_at"]),
        updated_at: value_string(value, &["updated_at"]),
        collaborators: value.get("reviewers").and_then(serde_json::Value::as_array).into_iter().flatten().map(|item| value_string(item, &["name"])).filter(|name| !name.is_empty()).collect(),
        additions: None, deletions: None,
        changed_files: value_string(value, &["changes_count"]).parse().ok(),
        merge_status: match value_string(value, &["detailed_merge_status"]).as_str() { "mergeable" | "can_be_merged" => "mergeable", "conflict" | "conflicts" => "conflicts", "checking" | "unchecked" | "preparing" => "checking", "" => "", _ => "blocked" }.to_string(), comments: Vec::new(),
    }
}

fn parse_gitea_review(value: &serde_json::Value) -> Option<IntegrationReviewRequest> {
    value.get("pull_request")?;
    let number = value_u64(value, "number");
    let repository_id = value
        .get("repository")
        .and_then(|repository| repository.get("id"))
        .and_then(serde_json::Value::as_u64)
        .map_or_else(String::new, |id| id.to_string());
    let is_open = value_string(value, &["state"]) == "open";
    let merged = value
        .get("pull_request")
        .and_then(|pull| pull.get("merged_at"))
        .is_some_and(|item| !item.is_null());
    Some(IntegrationReviewRequest {
        id: format!("gitea:{repository_id}:{number}"),
        number,
        provider: "gitea".to_string(),
        repository_id,
        repository_name: value_string(value, &["repository", "full_name"]),
        title: value_string(value, &["title"]),
        description: value_string(value, &["body"]),
        author: value_string(value, &["user", "login"]),
        state: if merged {
            "merged"
        } else if is_open {
            "open"
        } else {
            "closed"
        }
        .to_string(),
        source_branch: {
            let branch = value_string(value, &["pull_request", "head", "ref"]);
            if branch.is_empty() { value_string(value, &["pull_request", "head", "label"]) } else { branch }
        },
        target_branch: {
            let branch = value_string(value, &["pull_request", "base", "ref"]);
            if branch.is_empty() { value_string(value, &["pull_request", "base", "label"]) } else { branch }
        },
        web_url: value_string(value, &["html_url"]),
        created_at: value_string(value, &["created_at"]),
        updated_at: value_string(value, &["updated_at"]),
        collaborators: Vec::new(), additions: None, deletions: None, changed_files: None,
        merge_status: value.get("pull_request").and_then(|pull| pull.get("mergeable")).and_then(serde_json::Value::as_bool).map(|mergeable| if mergeable { "mergeable" } else { "conflicts" }).unwrap_or_default().to_string(), comments: Vec::new(),
    })
}

fn parse_azure_review(
    value: &serde_json::Value,
    repository: &IntegrationRepository,
) -> IntegrationReviewRequest {
    let number = value_u64(value, "pullRequestId");
    let raw_state = value_string(value, &["status"]);
    let draft = value.get("isDraft").and_then(serde_json::Value::as_bool) == Some(true);
    let state = match raw_state.as_str() {
        "active" if draft => "draft",
        "active" => "open",
        "completed" => "merged",
        _ => "closed",
    };
    let trim_branch = |branch: String| {
        branch
            .strip_prefix("refs/heads/")
            .unwrap_or(&branch)
            .to_string()
    };
    IntegrationReviewRequest {
        id: format!("azure-devops:{}:{number}", repository.id),
        number,
        provider: "azure-devops".to_string(),
        repository_id: repository.id.clone(),
        repository_name: repository.full_name.clone(),
        title: value_string(value, &["title"]),
        description: value_string(value, &["description"]),
        author: value_string(value, &["createdBy", "displayName"]),
        state: state.to_string(),
        source_branch: trim_branch(value_string(value, &["sourceRefName"])),
        target_branch: trim_branch(value_string(value, &["targetRefName"])),
        web_url: format!(
            "{}/pullrequest/{number}",
            repository.web_url.trim_end_matches('/')
        ),
        created_at: value_string(value, &["creationDate"]),
        updated_at: value_string(value, &["closedDate"]),
        collaborators: value.get("reviewers").and_then(serde_json::Value::as_array).into_iter().flatten().map(|item| value_string(item, &["displayName"])).filter(|name| !name.is_empty()).collect(),
        additions: None, deletions: None, changed_files: None,
        merge_status: match value_string(value, &["mergeStatus"]).as_str() { "succeeded" => "mergeable", "conflicts" => "conflicts", "queued" | "notSet" => "checking", "" => "", _ => "blocked" }.to_string(), comments: Vec::new(),
    }
}

fn github_reviews(
    client: &Client,
    base_url: &str,
    token: &str,
    state: &str,
) -> Result<Vec<IntegrationReviewRequest>, String> {
    let query = match state {
        "open" => "is:pr is:open",
        "merged" => "is:pr is:merged",
        "closed" => "is:pr is:closed is:unmerged",
        _ => return Err("Unsupported review state.".to_string()),
    };
    let response = client
        .get(format!("{}/search/issues", github_api_base_url(base_url)?))
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/vnd.github+json")
        .header("Authorization", format!("Bearer {token}"))
        .header("X-GitHub-Api-Version", "2026-03-10")
        .query(&[
            ("q", query),
            ("sort", "updated"),
            ("order", "desc"),
            ("per_page", "100"),
        ])
        .send()
        .map_err(|err| format!("Could not reach GitHub: {err}"))?;
    if !response.status().is_success() {
        return Err(response_error(response, "GitHub"));
    }
    let payload = response
        .json::<serde_json::Value>()
        .map_err(|err| format!("GitHub returned an unreadable pull request list: {err}"))?;
    Ok(payload
        .get("items")
        .and_then(serde_json::Value::as_array)
        .into_iter()
        .flatten()
        .filter_map(parse_github_review)
        .map(|mut review| {
            if state != "open" {
                review.state = state.to_string();
            }
            review
        })
        .collect())
}

fn gitlab_reviews(
    client: &Client,
    base_url: &str,
    token: &str,
    provider: &str,
    state: &str,
) -> Result<Vec<IntegrationReviewRequest>, String> {
    let api_state = match state {
        "open" => "opened",
        "merged" => "merged",
        "closed" => "closed",
        _ => return Err("Unsupported review state.".to_string()),
    };
    let response = client
        .get(format!("{base_url}/api/v4/merge_requests"))
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/json")
        .header("PRIVATE-TOKEN", token)
        .query(&[
            ("scope", "all"),
            ("state", api_state),
            ("order_by", "updated_at"),
            ("sort", "desc"),
            ("per_page", "100"),
        ])
        .send()
        .map_err(|err| format!("Could not reach GitLab: {err}"))?;
    if !response.status().is_success() {
        return Err(response_error(response, "GitLab"));
    }
    Ok(response
        .json::<Vec<serde_json::Value>>()
        .map_err(|err| format!("GitLab returned an unreadable merge request list: {err}"))?
        .iter()
        .map(|value| parse_gitlab_review(value, provider))
        .collect())
}

fn gitea_reviews(
    client: &Client,
    base_url: &str,
    token: &str,
    state: &str,
) -> Result<Vec<IntegrationReviewRequest>, String> {
    let api_state = if state == "open" { "open" } else { "closed" };
    let response = client
        .get(format!("{base_url}/api/v1/repos/issues/search"))
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/json")
        .header("Authorization", format!("token {token}"))
        .query(&[("type", "pulls"), ("state", api_state), ("limit", "100")])
        .send()
        .map_err(|err| format!("Could not reach Gitea: {err}"))?;
    if !response.status().is_success() {
        return Err(response_error(response, "Gitea"));
    }
    Ok(response
        .json::<Vec<serde_json::Value>>()
        .map_err(|err| format!("Gitea returned an unreadable pull request list: {err}"))?
        .iter()
        .filter_map(parse_gitea_review)
        .filter(|review| state == "open" || review.state == state)
        .collect())
}

fn azure_project_reviews(
    client: &Client,
    base_url: &str,
    username: &str,
    token: &str,
    api_state: &str,
    project: &str,
    repositories: &[IntegrationRepository],
) -> Result<Vec<IntegrationReviewRequest>, String> {
    let mut endpoint =
        reqwest::Url::parse(base_url).map_err(|err| format!("Invalid Azure DevOps URL: {err}"))?;
    endpoint
        .path_segments_mut()
        .map_err(|_| "Invalid Azure DevOps URL.".to_string())?
        .push(project)
        .push("_apis")
        .push("git")
        .push("pullrequests");
    let response = client
        .get(endpoint)
        .timeout(Duration::from_secs(15))
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/json")
        .basic_auth(username, Some(token))
        .query(&[
            ("searchCriteria.status", api_state),
            ("$top", "100"),
            ("api-version", "7.1"),
        ])
        .send()
        .map_err(|err| format!("Could not reach Azure DevOps project {project}: {err}"))?;
    if !response.status().is_success() {
        return Err(response_error(response, "Azure DevOps"));
    }
    let payload = response
        .json::<serde_json::Value>()
        .map_err(|err| format!("Azure DevOps returned an unreadable pull request list: {err}"))?;
    Ok(payload
        .get("value")
        .and_then(serde_json::Value::as_array)
        .into_iter()
        .flatten()
        .filter_map(|value| {
            let repository_id = value_string(value, &["repository", "id"]);
            repositories
                .iter()
                .find(|repository| repository.id == repository_id)
                .map(|repository| parse_azure_review(value, repository))
        })
        .collect())
}

fn azure_reviews(
    client: &Client,
    base_url: &str,
    username: &str,
    token: &str,
    state: &str,
) -> Result<Vec<IntegrationReviewRequest>, String> {
    let api_state = match state {
        "open" => "active",
        "merged" => "completed",
        "closed" => "abandoned",
        _ => return Err("Unsupported review state.".to_string()),
    };
    let repositories = azure_repositories(client, base_url, username, token)?;
    let projects: Vec<_> = repositories
        .iter()
        .filter_map(|repository| {
            repository
                .full_name
                .split_once('/')
                .map(|(project, _)| project)
        })
        .collect::<BTreeSet<_>>()
        .into_iter()
        .collect();
    if projects.is_empty() {
        return Ok(Vec::new());
    }
    let chunk_size = projects.len().div_ceil(AZURE_PROJECT_WORKERS);
    let results = std::thread::scope(|scope| {
        let handles = projects
            .chunks(chunk_size)
            .map(|project_chunk| {
                let repositories = &repositories;
                scope.spawn(move || {
                    project_chunk
                        .iter()
                        .map(|project| {
                            azure_project_reviews(
                                client,
                                base_url,
                                username,
                                token,
                                api_state,
                                project,
                                repositories,
                            )
                        })
                        .collect::<Vec<_>>()
                })
            })
            .collect::<Vec<_>>();
        let mut results = Vec::with_capacity(projects.len());
        for handle in handles {
            match handle.join() {
                Ok(worker_results) => results.extend(worker_results),
                Err(_) => results.push(Err("Azure DevOps project worker failed.".to_string())),
            }
        }
        results
    });
    let mut reviews = Vec::new();
    let mut errors = Vec::new();
    let mut successful_projects = 0usize;
    for result in results {
        match result {
            Ok(project_reviews) => {
                successful_projects += 1;
                reviews.extend(project_reviews);
            }
            Err(error) => errors.push(error),
        }
    }
    if successful_projects == 0 && !errors.is_empty() {
        let omitted = errors.len().saturating_sub(3);
        let mut detail = errors.into_iter().take(3).collect::<Vec<_>>().join("; ");
        if omitted > 0 {
            detail.push_str(&format!("; and {omitted} more project request(s) failed."));
        }
        return Err(detail);
    }
    reviews.sort_by(|left, right| right.updated_at.cmp(&left.updated_at));
    Ok(reviews)
}

fn ensure_action_response(response: Response, provider: &str, action: &str) -> Result<(), String> {
    if response.status().is_success() {
        Ok(())
    } else {
        Err(format!("Could not {action} review request: {}", response_error(response, provider)))
    }
}

fn github_review_action(
    client: &Client,
    base_url: &str,
    token: &str,
    repository_name: &str,
    number: u64,
    action: &str,
    merge_method: Option<&str>,
) -> Result<(), String> {
    if repository_name.split('/').count() != 2 {
        return Err("GitHub returned an invalid repository name.".to_string());
    }
    let endpoint = format!("{}/repos/{repository_name}/pulls/{number}", github_api_base_url(base_url)?);
    let request = match action {
        "merge" => client.put(format!("{endpoint}/merge")).json(&merge_payload("github", merge_method)?),
        "approve" => client.post(format!("{endpoint}/reviews")).json(&serde_json::json!({ "event": "APPROVE" })),
        "close" => client.patch(&endpoint).json(&serde_json::json!({ "state": "closed" })),
        "reopen" => client.patch(&endpoint).json(&serde_json::json!({ "state": "open" })),
        _ => return Err("Unsupported review action.".to_string()),
    };
    let response = request
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/vnd.github+json")
        .header("Authorization", format!("Bearer {token}"))
        .header("X-GitHub-Api-Version", "2026-03-10")
        .send()
        .map_err(|err| format!("Could not reach GitHub: {err}"))?;
    ensure_action_response(response, "GitHub", action)
}

fn gitlab_review_action(
    client: &Client,
    base_url: &str,
    token: &str,
    repository_id: &str,
    number: u64,
    action: &str,
    merge_method: Option<&str>,
) -> Result<(), String> {
    if repository_id.trim().is_empty() {
        return Err("GitLab returned an invalid project identifier.".to_string());
    }
    let endpoint = format!("{base_url}/api/v4/projects/{repository_id}/merge_requests/{number}");
    let request = match action {
        "merge" => client.put(format!("{endpoint}/merge")).json(&merge_payload("gitlab", merge_method)?),
        "approve" => client.post(format!("{endpoint}/approve")),
        "close" => client.put(&endpoint).query(&[("state_event", "close")]),
        "reopen" => client.put(&endpoint).query(&[("state_event", "reopen")]),
        _ => return Err("Unsupported review action.".to_string()),
    };
    let response = request
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/json")
        .header("PRIVATE-TOKEN", token)
        .send()
        .map_err(|err| format!("Could not reach GitLab: {err}"))?;
    ensure_action_response(response, "GitLab", action)
}

fn gitea_review_action(
    client: &Client,
    base_url: &str,
    token: &str,
    repository_name: &str,
    number: u64,
    action: &str,
    merge_method: Option<&str>,
) -> Result<(), String> {
    if repository_name.split('/').count() != 2 {
        return Err("Gitea returned an invalid repository name.".to_string());
    }
    let endpoint = format!("{base_url}/api/v1/repos/{repository_name}/pulls/{number}");
    let request = match action {
        "merge" => client.post(format!("{endpoint}/merge")).json(&merge_payload("gitea", merge_method)?),
        "approve" => client.post(format!("{endpoint}/reviews")).json(&serde_json::json!({ "event": "APPROVED", "body": "" })),
        "close" => client.patch(&endpoint).json(&serde_json::json!({ "state": "closed" })),
        "reopen" => client.patch(&endpoint).json(&serde_json::json!({ "state": "open" })),
        _ => return Err("Unsupported review action.".to_string()),
    };
    let response = request
        .header(USER_AGENT, "Gitty")
        .header(ACCEPT, "application/json")
        .header("Authorization", format!("token {token}"))
        .send()
        .map_err(|err| format!("Could not reach Gitea: {err}"))?;
    ensure_action_response(response, "Gitea", action)
}

fn azure_review_endpoint(
    base_url: &str,
    repository_name: &str,
    repository_id: &str,
    number: u64,
) -> Result<reqwest::Url, String> {
    let project = repository_name
        .split_once('/')
        .map(|(project, _)| project)
        .filter(|project| !project.is_empty())
        .ok_or_else(|| "Azure DevOps returned an invalid repository name.".to_string())?;
    let mut endpoint = reqwest::Url::parse(base_url)
        .map_err(|err| format!("Invalid Azure DevOps URL: {err}"))?;
    endpoint
        .path_segments_mut()
        .map_err(|_| "Invalid Azure DevOps URL.".to_string())?
        .push(project)
        .push("_apis")
        .push("git")
        .push("repositories")
        .push(repository_id)
        .push("pullrequests")
        .push(&number.to_string());
    endpoint.query_pairs_mut().append_pair("api-version", "7.1");
    Ok(endpoint)
}

fn azure_review_action(
    client: &Client,
    base_url: &str,
    username: &str,
    token: &str,
    repository_name: &str,
    repository_id: &str,
    number: u64,
    action: &str,
    merge_method: Option<&str>,
) -> Result<(), String> {
    let endpoint = azure_review_endpoint(base_url, repository_name, repository_id, number)?;
    let auth_user = if username.trim().is_empty() { "gitty" } else { username };
    if action == "approve" {
        let mut identity_endpoint = reqwest::Url::parse(base_url)
            .map_err(|err| format!("Invalid Azure DevOps URL: {err}"))?;
        identity_endpoint.path_segments_mut().map_err(|_| "Invalid Azure DevOps URL.".to_string())?.push("_apis").push("connectionData");
        identity_endpoint.query_pairs_mut().append_pair("connectOptions", "1").append_pair("lastChangeId", "-1").append_pair("lastChangeId64", "-1");
        let identity = client.get(identity_endpoint).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).send()
            .map_err(|err| format!("Could not reach Azure DevOps: {err}"))?;
        if !identity.status().is_success() { return Err(response_error(identity, "Azure DevOps")); }
        let payload = identity.json::<serde_json::Value>().map_err(|err| format!("Azure DevOps returned an unreadable identity: {err}"))?;
        let reviewer_id = value_string(&payload, &["authenticatedUser", "id"]);
        if reviewer_id.is_empty() { return Err("Azure DevOps did not return the authenticated user.".to_string()); }
        let reviewer_endpoint = format!("{}/reviewers/{reviewer_id}?api-version=7.1", endpoint.as_str().split('?').next().unwrap_or_default());
        let response = client.put(reviewer_endpoint).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).json(&serde_json::json!({ "vote": 10 })).send()
            .map_err(|err| format!("Could not reach Azure DevOps: {err}"))?;
        return ensure_action_response(response, "Azure DevOps", action);
    }
    let body = match action {
        "close" => serde_json::json!({ "status": "abandoned" }),
        "reopen" => serde_json::json!({ "status": "active" }),
        "merge" => {
            let current = client.get(endpoint.clone()).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).send()
                .map_err(|err| format!("Could not reach Azure DevOps: {err}"))?;
            if !current.status().is_success() { return Err(response_error(current, "Azure DevOps")); }
            let payload = current.json::<serde_json::Value>().map_err(|err| format!("Azure DevOps returned an unreadable pull request: {err}"))?;
            let commit_id = value_string(&payload, &["lastMergeSourceCommit", "commitId"]);
            if commit_id.is_empty() { return Err("Azure DevOps did not return the current source commit.".to_string()); }
            {
                let mut body = merge_payload("azure-devops", merge_method)?;
                body["status"] = serde_json::json!("completed");
                body["lastMergeSourceCommit"] = serde_json::json!({ "commitId": commit_id });
                body
            }
        }
        _ => return Err("Unsupported review action.".to_string()),
    };
    let response = client.patch(endpoint).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).json(&body).send()
        .map_err(|err| format!("Could not reach Azure DevOps: {err}"))?;
    ensure_action_response(response, "Azure DevOps", action)
}

fn review_names(value: &serde_json::Value, key: &str, name_key: &str) -> Vec<String> {
    value.get(key).and_then(serde_json::Value::as_array).into_iter().flatten()
        .map(|item| value_string(item, &[name_key]))
        .filter(|name| !name.is_empty()).collect()
}

fn json_id(value: &serde_json::Value) -> String {
    value.get("id").map_or_else(String::new, |id| id.as_str().map(str::to_string).or_else(|| id.as_u64().map(|id| id.to_string())).unwrap_or_default())
}

fn review_comments(client: &Client, base_url: &str, username: &str, token: &str, review: &IntegrationReviewRequest) -> Result<Vec<IntegrationReviewComment>, String> {
    let (payload, provider) = match review.provider.as_str() {
        "github" => {
            let url = format!("{}/repos/{}/issues/{}/comments", github_api_base_url(base_url)?, review.repository_name, review.number);
            let response = client.get(url).header(USER_AGENT,"Gitty").header(ACCEPT,"application/vnd.github+json").header("Authorization",format!("Bearer {token}")).header("X-GitHub-Api-Version","2026-03-10").query(&[("per_page","100")]).send().map_err(|err|format!("Could not load GitHub comments: {err}"))?;
            if !response.status().is_success(){return Err(response_error(response,"GitHub"));} (response.json::<serde_json::Value>().map_err(|err|format!("GitHub returned unreadable comments: {err}"))?,"github")
        }
        "gitlab" | "gitlab-self-hosted" => {
            let url=format!("{base_url}/api/v4/projects/{}/merge_requests/{}/notes",review.repository_id,review.number);
            let response=client.get(url).header(USER_AGENT,"Gitty").header("PRIVATE-TOKEN",token).query(&[("per_page","100"),("sort","asc")]).send().map_err(|err|format!("Could not load GitLab comments: {err}"))?;
            if !response.status().is_success(){return Err(response_error(response,"GitLab"));} (response.json::<serde_json::Value>().map_err(|err|format!("GitLab returned unreadable comments: {err}"))?,"gitlab")
        }
        "gitea" => {
            let url=format!("{base_url}/api/v1/repos/{}/issues/{}/comments",review.repository_name,review.number);
            let response=client.get(url).header(USER_AGENT,"Gitty").header("Authorization",format!("token {token}")).query(&[("limit","100")]).send().map_err(|err|format!("Could not load Gitea comments: {err}"))?;
            if !response.status().is_success(){return Err(response_error(response,"Gitea"));} (response.json::<serde_json::Value>().map_err(|err|format!("Gitea returned unreadable comments: {err}"))?,"gitea")
        }
        "azure-devops" => {
            let mut url=azure_review_endpoint(base_url,&review.repository_name,&review.repository_id,review.number)?; url.set_query(None); url.path_segments_mut().map_err(|_|"Invalid Azure DevOps URL.".to_string())?.push("threads"); url.query_pairs_mut().append_pair("api-version","7.1");
            let auth=if username.trim().is_empty(){"gitty"}else{username}; let response=client.get(url).header(USER_AGENT,"Gitty").basic_auth(auth,Some(token)).send().map_err(|err|format!("Could not load Azure DevOps comments: {err}"))?;
            if !response.status().is_success(){return Err(response_error(response,"Azure DevOps"));} (response.json::<serde_json::Value>().map_err(|err|format!("Azure DevOps returned unreadable comments: {err}"))?,"azure-devops")
        }
        _=>return Err("Unsupported integration provider.".to_string()),
    };
    let mut comments=Vec::new();
    if provider=="azure-devops" {
        for thread in payload.get("value").and_then(serde_json::Value::as_array).into_iter().flatten() { for item in thread.get("comments").and_then(serde_json::Value::as_array).into_iter().flatten() { if item.get("isDeleted").and_then(serde_json::Value::as_bool)==Some(true){continue;} comments.push(IntegrationReviewComment{id:format!("{}:{}",json_id(thread),json_id(item)),author:value_string(item,&["author","displayName"]),body:value_string(item,&["content"]),created_at:value_string(item,&["publishedDate"])}); } }
    } else if let Some(items)=payload.as_array() { for item in items { if provider=="gitlab" && item.get("system").and_then(serde_json::Value::as_bool)==Some(true){continue;} comments.push(IntegrationReviewComment{id:json_id(item),author:if provider=="gitlab"{value_string(item,&["author","name"])}else{value_string(item,&["user","login"])},body:value_string(item,&["body"]),created_at:value_string(item,&["created_at"])}); } }
    Ok(comments)
}

fn post_review_comment(client:&Client,base_url:&str,username:&str,token:&str,review:&IntegrationReviewRequest,body:&str)->Result<(),String>{
    let response=match review.provider.as_str(){
        "github"=>client.post(format!("{}/repos/{}/issues/{}/comments",github_api_base_url(base_url)?,review.repository_name,review.number)).header(USER_AGENT,"Gitty").header(ACCEPT,"application/vnd.github+json").header("Authorization",format!("Bearer {token}")).header("X-GitHub-Api-Version","2026-03-10").json(&serde_json::json!({"body":body})).send().map_err(|err|format!("Could not reach GitHub: {err}"))?,
        "gitlab"|"gitlab-self-hosted"=>client.post(format!("{base_url}/api/v4/projects/{}/merge_requests/{}/notes",review.repository_id,review.number)).header(USER_AGENT,"Gitty").header("PRIVATE-TOKEN",token).json(&serde_json::json!({"body":body})).send().map_err(|err|format!("Could not reach GitLab: {err}"))?,
        "gitea"=>client.post(format!("{base_url}/api/v1/repos/{}/issues/{}/comments",review.repository_name,review.number)).header(USER_AGENT,"Gitty").header("Authorization",format!("token {token}")).json(&serde_json::json!({"body":body})).send().map_err(|err|format!("Could not reach Gitea: {err}"))?,
        "azure-devops"=>{let mut url=azure_review_endpoint(base_url,&review.repository_name,&review.repository_id,review.number)?;url.set_query(None);url.path_segments_mut().map_err(|_|"Invalid Azure DevOps URL.".to_string())?.push("threads");url.query_pairs_mut().append_pair("api-version","7.1");let auth=if username.trim().is_empty(){"gitty"}else{username};client.post(url).header(USER_AGENT,"Gitty").basic_auth(auth,Some(token)).json(&serde_json::json!({"comments":[{"parentCommentId":0,"content":body,"commentType":1}],"status":1})).send().map_err(|err|format!("Could not reach Azure DevOps: {err}"))?},
        _=>return Err("Unsupported integration provider.".to_string())};
    ensure_action_response(response, provider_label_for_error(&review.provider), "add comment")
}

fn provider_label_for_error(provider:&str)->&str{match provider{"github"=>"GitHub","gitlab"|"gitlab-self-hosted"=>"GitLab","gitea"=>"Gitea","azure-devops"=>"Azure DevOps",_=>"Integration"}}

fn load_review_details(
    client: &Client,
    base_url: &str,
    username: &str,
    token: &str,
    mut review: IntegrationReviewRequest,
) -> Result<IntegrationReviewRequest, String> {
    let payload = match review.provider.as_str() {
        "github" => {
            let endpoint = format!("{}/repos/{}/pulls/{}", github_api_base_url(base_url)?, review.repository_name, review.number);
            let response = client.get(endpoint).header(USER_AGENT, "Gitty").header(ACCEPT, "application/vnd.github+json").header("Authorization", format!("Bearer {token}")).header("X-GitHub-Api-Version", "2026-03-10").send().map_err(|err| format!("Could not reach GitHub: {err}"))?;
            if !response.status().is_success() { return Err(response_error(response, "GitHub")); }
            response.json::<serde_json::Value>().map_err(|err| format!("GitHub returned unreadable pull request details: {err}"))?
        }
        "gitlab" | "gitlab-self-hosted" => {
            let endpoint = format!("{base_url}/api/v4/projects/{}/merge_requests/{}", review.repository_id, review.number);
            let response = client.get(&endpoint).header(USER_AGENT, "Gitty").header("PRIVATE-TOKEN", token).send().map_err(|err| format!("Could not reach GitLab: {err}"))?;
            if !response.status().is_success() { return Err(response_error(response, "GitLab")); }
            let mut payload = response.json::<serde_json::Value>().map_err(|err| format!("GitLab returned unreadable merge request details: {err}"))?;
            let diffs = client.get(format!("{endpoint}/diffs")).header(USER_AGENT, "Gitty").header("PRIVATE-TOKEN", token).query(&[("per_page", "100")]).send().map_err(|err| format!("Could not load GitLab diffs: {err}"))?;
            if diffs.status().is_success() {
                if let Ok(items) = diffs.json::<Vec<serde_json::Value>>() { payload["gitty_diffs"] = serde_json::Value::Array(items); }
            }
            payload
        }
        "gitea" => {
            let endpoint = format!("{base_url}/api/v1/repos/{}/pulls/{}", review.repository_name, review.number);
            let response = client.get(endpoint).header(USER_AGENT, "Gitty").header("Authorization", format!("token {token}")).send().map_err(|err| format!("Could not reach Gitea: {err}"))?;
            if !response.status().is_success() { return Err(response_error(response, "Gitea")); }
            response.json::<serde_json::Value>().map_err(|err| format!("Gitea returned unreadable pull request details: {err}"))?
        }
        "azure-devops" => {
            let endpoint = azure_review_endpoint(base_url, &review.repository_name, &review.repository_id, review.number)?;
            let auth_user = if username.trim().is_empty() { "gitty" } else { username };
            let response = client.get(endpoint.clone()).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).send().map_err(|err| format!("Could not reach Azure DevOps: {err}"))?;
            if !response.status().is_success() { return Err(response_error(response, "Azure DevOps")); }
            let mut payload = response.json::<serde_json::Value>().map_err(|err| format!("Azure DevOps returned unreadable pull request details: {err}"))?;
            let mut iterations_url = endpoint; iterations_url.set_query(None); iterations_url.path_segments_mut().map_err(|_| "Invalid Azure DevOps URL.".to_string())?.push("iterations"); iterations_url.query_pairs_mut().append_pair("api-version", "7.1");
            if let Ok(iterations) = client.get(iterations_url.clone()).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).send() {
                if iterations.status().is_success() {
                    if let Ok(value) = iterations.json::<serde_json::Value>() {
                        if let Some(id) = value.get("value").and_then(serde_json::Value::as_array).and_then(|items| items.last()).and_then(|item| item.get("id")).and_then(serde_json::Value::as_u64) {
                            iterations_url.set_query(None); iterations_url.path_segments_mut().map_err(|_| "Invalid Azure DevOps URL.".to_string())?.push(&id.to_string()).push("changes"); iterations_url.query_pairs_mut().append_pair("$top", "2000").append_pair("api-version", "7.1");
                            if let Ok(changes) = client.get(iterations_url).header(USER_AGENT, "Gitty").basic_auth(auth_user, Some(token)).send() { if changes.status().is_success() { if let Ok(value) = changes.json::<serde_json::Value>() { payload["gitty_changed_files"] = serde_json::json!(value.get("changeEntries").and_then(serde_json::Value::as_array).map_or(0, Vec::len)); } } }
                        }
                    }
                }
            }
            payload
        }
        _ => return Err("Unsupported integration provider.".to_string()),
    };
    match review.provider.as_str() {
        "github" => { review.additions = payload.get("additions").and_then(serde_json::Value::as_u64); review.deletions = payload.get("deletions").and_then(serde_json::Value::as_u64); review.changed_files = payload.get("changed_files").and_then(serde_json::Value::as_u64); review.collaborators = review_names(&payload, "requested_reviewers", "login"); review.source_branch = value_string(&payload, &["head", "ref"]); review.target_branch = value_string(&payload, &["base", "ref"]); review.merge_status = match payload.get("mergeable").and_then(serde_json::Value::as_bool) { Some(true) => "mergeable", Some(false) => "conflicts", None => "checking" }.to_string(); }
        "gitlab" | "gitlab-self-hosted" => { review.collaborators = review_names(&payload, "reviewers", "name"); review.changed_files = value_string(&payload, &["changes_count"]).parse().ok(); review.merge_status = match value_string(&payload, &["detailed_merge_status"]).as_str() { "mergeable" | "can_be_merged" => "mergeable", "conflict" | "conflicts" => "conflicts", "checking" | "unchecked" | "preparing" => "checking", _ => "blocked" }.to_string(); if let Some(diffs) = payload.get("gitty_diffs").and_then(serde_json::Value::as_array) { let mut plus=0; let mut minus=0; for line in diffs.iter().filter_map(|item| item.get("diff").and_then(serde_json::Value::as_str)).flat_map(str::lines) { if line.starts_with('+') && !line.starts_with("+++") { plus+=1; } else if line.starts_with('-') && !line.starts_with("---") { minus+=1; } } review.additions=Some(plus); review.deletions=Some(minus); review.changed_files=Some(diffs.len() as u64); } }
        "gitea" => { review.additions=payload.get("additions").and_then(serde_json::Value::as_u64); review.deletions=payload.get("deletions").and_then(serde_json::Value::as_u64); review.changed_files=payload.get("changed_files").and_then(serde_json::Value::as_u64); review.collaborators=review_names(&payload,"requested_reviewers","login"); let source=value_string(&payload,&["head","ref"]); if !source.is_empty(){review.source_branch=source;} let target=value_string(&payload,&["base","ref"]); if !target.is_empty(){review.target_branch=target;} review.merge_status=payload.get("mergeable").and_then(serde_json::Value::as_bool).map(|ok|if ok{"mergeable"}else{"conflicts"}).unwrap_or("checking").to_string(); }
        "azure-devops" => { review.collaborators=review_names(&payload,"reviewers","displayName"); review.changed_files=payload.get("gitty_changed_files").and_then(serde_json::Value::as_u64); review.merge_status=match value_string(&payload,&["mergeStatus"]).as_str(){"succeeded"=>"mergeable","conflicts"=>"conflicts","queued"|"notSet"=>"checking",_=>"blocked"}.to_string(); }
        _ => {}
    }
    review.comments = review_comments(client, base_url, username, token, &review).unwrap_or_default();
    Ok(review)
}

#[tauri::command]
pub async fn list_integration_review_requests(
    provider: String,
    base_url: String,
    username: String,
    token: String,
    state: String,
) -> Result<Vec<IntegrationReviewRequest>, String> {
    tokio::time::timeout(
        REVIEW_REQUEST_TIMEOUT,
        tauri::async_runtime::spawn_blocking(move || {
            if token.trim().is_empty() {
                return Err("No token is stored for this integration.".to_string());
            }
            let base_url = normalized_base_url(&base_url)?;
            let client = client()?;
            match provider.as_str() {
                "github" => github_reviews(&client, &base_url, &token, &state),
                "gitlab" | "gitlab-self-hosted" => {
                    gitlab_reviews(&client, &base_url, &token, &provider, &state)
                }
                "gitea" => gitea_reviews(&client, &base_url, &token, &state),
                "azure-devops" => azure_reviews(
                    &client,
                    &base_url,
                    if username.trim().is_empty() {
                        "gitty"
                    } else {
                        &username
                    },
                    &token,
                    &state,
                ),
                _ => Err("Unsupported integration provider.".to_string()),
            }
        }),
    )
    .await
    .map_err(|_| "The integration API did not respond within 35 seconds.".to_string())?
    .map_err(|err| format!("Could not load review requests: {err}"))?
}

#[tauri::command]
pub async fn run_integration_review_action(
    provider: String,
    base_url: String,
    username: String,
    token: String,
    repository_id: String,
    repository_name: String,
    number: u64,
    action: String,
    merge_method: Option<String>,
) -> Result<(), String> {
    tokio::time::timeout(
        REVIEW_REQUEST_TIMEOUT,
        tauri::async_runtime::spawn_blocking(move || {
            if token.trim().is_empty() { return Err("No token is stored for this integration.".to_string()); }
            if !matches!(action.as_str(), "merge" | "approve" | "close" | "reopen") { return Err("Unsupported review action.".to_string()); }
            if action == "merge" { merge_payload(&provider, merge_method.as_deref())?; }
            let base_url = normalized_base_url(&base_url)?;
            let client = client()?;
            match provider.as_str() {
                "github" => github_review_action(&client, &base_url, &token, &repository_name, number, &action, merge_method.as_deref()),
                "gitlab" | "gitlab-self-hosted" => gitlab_review_action(&client, &base_url, &token, &repository_id, number, &action, merge_method.as_deref()),
                "gitea" => gitea_review_action(&client, &base_url, &token, &repository_name, number, &action, merge_method.as_deref()),
                "azure-devops" => azure_review_action(&client, &base_url, &username, &token, &repository_name, &repository_id, number, &action, merge_method.as_deref()),
                _ => Err("Unsupported integration provider.".to_string()),
            }
        }),
    )
    .await
    .map_err(|_| "The integration API did not respond within 35 seconds.".to_string())?
    .map_err(|err| format!("Could not update review request: {err}"))?
}

#[tauri::command]
pub async fn get_integration_review_details(provider: String, base_url: String, username: String, token: String, request: IntegrationReviewRequest) -> Result<IntegrationReviewRequest, String> {
    tokio::time::timeout(REVIEW_REQUEST_TIMEOUT, tauri::async_runtime::spawn_blocking(move || {
        if token.trim().is_empty() { return Err("No token is stored for this integration.".to_string()); }
        let base_url = normalized_base_url(&base_url)?;
        let client = client()?;
        if provider != request.provider { return Err("Review provider does not match the selected integration.".to_string()); }
        load_review_details(&client, &base_url, &username, &token, request)
    })).await.map_err(|_| "The integration API did not respond within 35 seconds.".to_string())?
      .map_err(|err| format!("Could not load review details: {err}"))?
}

#[tauri::command]
pub async fn add_integration_review_comment(provider:String,base_url:String,username:String,token:String,request:IntegrationReviewRequest,body:String)->Result<(),String>{
    tokio::time::timeout(REVIEW_REQUEST_TIMEOUT,tauri::async_runtime::spawn_blocking(move||{
        let body=body.trim(); if body.is_empty(){return Err("Comment cannot be empty.".to_string());} if body.chars().count()>100_000{return Err("Comment is too long.".to_string());}
        if provider!=request.provider{return Err("Review provider does not match the selected integration.".to_string());}
        let base_url=normalized_base_url(&base_url)?; let client=client()?; post_review_comment(&client,&base_url,&username,&token,&request,body)
    })).await.map_err(|_|"The integration API did not respond within 35 seconds.".to_string())?.map_err(|err|format!("Could not add comment: {err}"))?
}

#[tauri::command]
pub fn open_in_browser(url: String) -> Result<(), String> {
    let normalized = normalized_base_url(&url)?;
    #[cfg(target_os = "windows")]
    let mut command = {
        let mut command = std::process::Command::new("rundll32");
        command.args(["url.dll,FileProtocolHandler", &normalized]);
        command
    };
    #[cfg(target_os = "macos")]
    let mut command = {
        let mut command = std::process::Command::new("open");
        command.arg(&normalized);
        command
    };
    #[cfg(not(any(target_os = "windows", target_os = "macos")))]
    let mut command = {
        let mut command = std::process::Command::new("xdg-open");
        command.arg(&normalized);
        command
    };
    command
        .spawn()
        .map(|_| ())
        .map_err(|err| format!("Could not open the browser: {err}"))
}

#[tauri::command]
pub async fn list_integration_repositories(
    provider: String,
    base_url: String,
    account_id: Option<String>,
) -> Result<Vec<IntegrationRepository>, String> {
    tauri::async_runtime::spawn_blocking(move || {
        let credential_key = integration_key(&provider, account_id.as_deref())?;
        let credential = load_stored_credential(&credential_key)?
            .ok_or_else(|| "No token is stored for this integration.".to_string())?;
        let base_url = normalized_base_url(&base_url)?;
        let client = client()?;
        match provider.as_str() {
            "github" => github_repositories(&client, &base_url, &credential.password),
            "gitlab" | "gitlab-self-hosted" => {
                gitlab_repositories(&client, &base_url, &credential.password)
            }
            "azure-devops" => azure_repositories(
                &client,
                &base_url,
                if credential.username.trim().is_empty() {
                    "gitty"
                } else {
                    &credential.username
                },
                &credential.password,
            ),
            "gitea" => gitea_repositories(&client, &base_url, &credential.password),
            _ => Err("Unsupported integration provider.".to_string()),
        }
    })
    .await
    .map_err(|err| format!("Could not load integration repositories: {err}"))?
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn base_urls_are_normalized_and_validated() {
        assert_eq!(
            normalized_base_url(" https://gitlab.example.com/ ").unwrap(),
            "https://gitlab.example.com"
        );
        assert!(normalized_base_url("gitlab.example.com").is_err());
        assert_eq!(
            github_api_base_url("https://github.com/").unwrap(),
            "https://api.github.com"
        );
        assert!(github_api_base_url("https://github.example.com").is_err());
    }

    #[test]
    fn integration_credential_keys_match_the_frontend() {
        assert_eq!(
            integration_key("github", None).unwrap(),
            "integration:github"
        );
        assert_eq!(integration_key("gitea", None).unwrap(), "integration:gitea");
        assert_eq!(
            integration_key("azure-devops", Some("org-123")).unwrap(),
            "integration:azure-devops:org-123"
        );
        assert_eq!(
            integration_key("azure-devops", Some("default")).unwrap(),
            "integration:azure-devops"
        );
        assert!(integration_key("azure-devops", Some("../invalid")).is_err());
    }

    #[test]
    fn provider_repository_payloads_deserialize() {
        let github: Vec<GitHubRepository> = serde_json::from_str(
            r#"[{"id":6,"name":"desktop","full_name":"team/desktop","description":null,"clone_url":"https://github.com/team/desktop.git","ssh_url":"git@github.com:team/desktop.git","html_url":"https://github.com/team/desktop","updated_at":"2026-08-29T09:00:00Z","private":true}]"#,
        )
        .unwrap();
        assert_eq!(github[0].full_name, "team/desktop");
        assert!(github[0].description.is_none());

        let gitlab: Vec<GitLabProject> = serde_json::from_str(
            r#"[{"id":7,"name":"app","path_with_namespace":"team/app","description":"Demo","http_url_to_repo":"https://gitlab.test/team/app.git","ssh_url_to_repo":"git@gitlab.test:team/app.git","web_url":"https://gitlab.test/team/app","last_activity_at":"2026-08-29T10:00:00Z","visibility":"private"}]"#,
        )
        .unwrap();
        assert_eq!(gitlab[0].path_with_namespace, "team/app");
        assert_eq!(gitlab[0].visibility, "private");

        let gitea: Vec<GiteaRepository> = serde_json::from_str(
            r#"[{"id":8,"name":"api","full_name":"team/api","description":"","clone_url":"https://gitea.test/team/api.git","ssh_url":"git@gitea.test:team/api.git","html_url":"https://gitea.test/team/api","updated_at":"2026-08-29T11:00:00Z","private":false}]"#,
        )
        .unwrap();
        assert_eq!(gitea[0].full_name, "team/api");
        assert!(!gitea[0].private);

        let azure: AzureRepositoryList = serde_json::from_str(
            r#"{"value":[{"id":"repo-id","name":"web","project":{"name":"Platform"},"remoteUrl":"https://dev.azure.com/org/Platform/_git/web","sshUrl":"git@ssh.dev.azure.com:v3/org/Platform/web","webUrl":"https://dev.azure.com/org/Platform/_git/web"}]}"#,
        )
        .unwrap();
        assert_eq!(azure.value[0].project.name, "Platform");
        assert_eq!(
            azure.value[0].remote_url,
            "https://dev.azure.com/org/Platform/_git/web"
        );
    }

    #[test]
    fn provider_review_payloads_map_to_common_shape() {
        let github: serde_json::Value = serde_json::from_str(r#"{
            "number":42,"title":"Improve dashboard","body":"Details","state":"open",
            "repository_url":"https://api.github.com/repos/team/app","html_url":"https://github.com/team/app/pull/42",
            "user":{"login":"alex"},"pull_request":{"merged_at":null},"created_at":"2026-09-01","updated_at":"2026-09-02"
        }"#).unwrap();
        let review = parse_github_review(&github).unwrap();
        assert_eq!(review.repository_name, "team/app");
        assert_eq!(review.state, "open");

        let gitlab: serde_json::Value = serde_json::from_str(r#"{
            "iid":7,"project_id":9,"title":"Add bisect","state":"opened","draft":true,
            "references":{"full":"team/app!7"},"author":{"name":"Sam"},
            "source_branch":"feature","target_branch":"main","web_url":"https://gitlab.test/team/app/-/merge_requests/7"
        }"#).unwrap();
        let review = parse_gitlab_review(&gitlab, "gitlab-self-hosted");
        assert_eq!(review.repository_name, "team/app");
        assert_eq!(review.state, "draft");

        let gitea: serde_json::Value = serde_json::from_str(r#"{
            "number":3,"title":"Fix menu","state":"closed","repository":{"id":2,"full_name":"team/ui"},
            "user":{"login":"dev"},"pull_request":{"merged_at":"2026-09-03"},"html_url":"https://gitea.test/team/ui/pulls/3"
        }"#).unwrap();
        let review = parse_gitea_review(&gitea).unwrap();
        assert_eq!(review.state, "merged");
    }

    #[test]
    fn azure_review_action_url_keeps_organization_and_encodes_project() {
        let endpoint = azure_review_endpoint(
            "https://dev.azure.com/example-org",
            "Machine Kits/api",
            "repo-id",
            42,
        )
        .unwrap();
        assert_eq!(
            endpoint.as_str(),
            "https://dev.azure.com/example-org/Machine%20Kits/_apis/git/repositories/repo-id/pullrequests/42?api-version=7.1"
        );
    }
}