import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import test from 'node:test';
import ts from 'typescript';

const source = readFileSync(new URL('../src/lib/workspaces.ts', import.meta.url), 'utf8');
const compiled = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.ESNext, target: ts.ScriptTarget.ES2022 } }).outputText;
const { readWorkspaces, WORKSPACES_KEY } = await import(`data:text/javascript;base64,${Buffer.from(compiled).toString('base64')}`);
const storage = values => ({ getItem: key => values[key] ?? null });

test('migrates dashboard assignments without copying unrelated tabs into a workspace', () => {
  const result = readWorkspaces(storage({ 'gitty.dashboard.v1': JSON.stringify({
    workspaces: [{ id: 'workspace-a', name: 'A' }, { id: 'workspace-b', name: 'B' }],
    assignments: { '/a': 'workspace-a', '/b': 'workspace-b', '/closed': 'workspace-a' },
  }) }), ['/a', '/b', '/outside']);
  assert.deepEqual(result.workspaces[0], { id: 'workspace-a', name: 'A', repositories: ['/a', '/closed'], openPaths: ['/a'], activePath: '/a' });
  assert.deepEqual(result.workspaces[1].openPaths, ['/b']);
  assert.deepEqual(result.defaultSession.openPaths, ['/a', '/b', '/outside']);
});

test('restores independent tab order and last active repository', () => {
  const saved = { selectedId: 'workspace-a', workspaces: [
    { id: 'workspace-a', name: 'A', repositories: ['/a', '/b'], openPaths: ['/b', '/a'], activePath: '/a' },
    { id: 'workspace-b', name: 'B', repositories: ['/b'], openPaths: [], activePath: '' },
  ], defaultSession: { openPaths: ['/outside'], activePath: '/outside' } };
  assert.deepEqual(readWorkspaces(storage({ [WORKSPACES_KEY]: JSON.stringify(saved) }), []), saved);
});

test('drops invalid memberships and stale active paths from saved sessions', () => {
  const saved = { selectedId: 'deleted', workspaces: [null, { id: 'workspace-a', name: 'A',
    repositories: ['/a', '/a', null], openPaths: ['/removed', '/a', 3], activePath: '/removed' }],
    defaultSession: { openPaths: ['/outside'], activePath: '/removed' } };
  const result = readWorkspaces(storage({ [WORKSPACES_KEY]: JSON.stringify(saved) }), []);
  assert.equal(result.selectedId, '');
  assert.deepEqual(result.workspaces[0].openPaths, ['/a']);
  assert.equal(result.workspaces[0].activePath, '/a');
  assert.deepEqual(result.workspaces[0].repositories, ['/a']);
  assert.equal(result.defaultSession.activePath, '/outside');
});

test('unavailable or corrupt preferences preserve existing repository tabs', () => {
  for (const source of [storage({ [WORKSPACES_KEY]: '{broken' }), { getItem() { throw new Error('Storage unavailable'); } }]) {
    assert.deepEqual(readWorkspaces(source, ['/existing']).defaultSession.openPaths, ['/existing']);
  }
});