import { describe, expect, it, afterEach } from 'vitest';
import { execFileSync } from 'node:child_process';
import { mkdtempSync, writeFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join, resolve, basename, dirname } from 'node:path';
import {
  parseWorktreePorcelain,
  isValidBranchName,
  isSafeAbsolutePath,
  isRepo,
  listWorktrees,
  worktreeStatus,
  addWorktree,
  removeWorktree,
  pruneWorktrees,
  isDirtyWorktreeError,
} from '../src/core/git.js';

const dirs: string[] = [];
afterEach(() => {
  for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true });
});

function makeTmpRepo(): string {
  const dir = mkdtempSync(join(tmpdir(), 'arb-git-'));
  dirs.push(dir);
  const run = (...args: string[]): void => void execFileSync('git', args, { cwd: dir, stdio: 'pipe' });
  run('init', '-b', 'main');
  run('config', 'user.email', 'test@arboretum.dev');
  run('config', 'user.name', 'Test');
  writeFileSync(join(dir, 'README.md'), '# test\n');
  run('add', '-A');
  run('commit', '-m', 'init');
  return dir;
}

describe('parseWorktreePorcelain', () => {
  it('parse le bloc principal, détaché, locked et prunable', () => {
    const out = [
      'worktree /repo',
      'HEAD abc123',
      'branch refs/heads/main',
      '',
      'worktree /repo-wt-x',
      'HEAD def456',
      'detached',
      'locked reason here',
      '',
      'worktree /repo-wt-gone',
      'HEAD 000',
      'prunable gitdir file points to non-existent location',
      '', // bloc final terminé par une ligne vide
    ].join('\n');
    const wts = parseWorktreePorcelain(out);
    expect(wts).toHaveLength(3);
    expect(wts[0]).toMatchObject({ path: '/repo', branch: 'main', detached: false });
    expect(wts[1]).toMatchObject({ path: '/repo-wt-x', detached: true, locked: true, branch: null });
    expect(wts[2]).toMatchObject({ path: '/repo-wt-gone', prunable: true });
  });

  it('tolère un bloc final sans ligne vide', () => {
    const wts = parseWorktreePorcelain('worktree /a\nHEAD x\nbranch refs/heads/dev');
    expect(wts).toEqual([
      { path: '/a', head: 'x', branch: 'dev', detached: false, locked: false, prunable: false, bare: false },
    ]);
  });
});

describe('validation', () => {
  it('isValidBranchName', () => {
    expect(isValidBranchName('feature/foo-1.2')).toBe(true);
    expect(isValidBranchName('-foo')).toBe(false);
    expect(isValidBranchName('a..b')).toBe(false);
    expect(isValidBranchName('a/')).toBe(false);
    expect(isValidBranchName('x.lock')).toBe(false);
    expect(isValidBranchName('a b')).toBe(false);
  });
  it('isSafeAbsolutePath', () => {
    expect(isSafeAbsolutePath('/home/u/proj-wt-x')).toBe(true);
    expect(isSafeAbsolutePath('relative/x')).toBe(false);
    expect(isSafeAbsolutePath('/home/u/../etc')).toBe(false);
  });
});

describe('opérations git (repo tmp réel)', () => {
  it('isRepo : racine vs non-repo', async () => {
    const repo = makeTmpRepo();
    expect(await isRepo(repo)).toBe(true);
    const notRepo = mkdtempSync(join(tmpdir(), 'arb-nogit-'));
    dirs.push(notRepo);
    expect(await isRepo(notRepo)).toBe(false);
  });

  it('add → list → status (dirty) → remove (refus dirty puis force)', async () => {
    const repo = makeTmpRepo();
    const wtPath = join(dirname(repo), `${basename(repo)}-wt-feat`);
    dirs.push(wtPath);
    await addWorktree(repo, { path: wtPath, branch: 'feat', newBranch: true });

    const list = await listWorktrees(repo);
    const wt = list.find((w) => resolve(w.path) === resolve(wtPath));
    expect(wt?.branch).toBe('feat');

    // worktree propre
    expect((await worktreeStatus(wtPath)).dirtyCount).toBe(0);
    // un fichier non suivi → dirty
    writeFileSync(join(wtPath, 'scratch.txt'), 'wip\n');
    expect((await worktreeStatus(wtPath)).dirtyCount).toBeGreaterThan(0);

    // remove sans --force refusé (worktree sale)
    let dirtyErr: unknown;
    await removeWorktree(repo, wtPath, false).catch((e) => (dirtyErr = e));
    expect(dirtyErr).toBeDefined();
    expect(isDirtyWorktreeError(dirtyErr)).toBe(true);

    // remove --force réussit
    await removeWorktree(repo, wtPath, true);
    expect((await listWorktrees(repo)).some((w) => resolve(w.path) === resolve(wtPath))).toBe(false);
  });

  it('prune retire un worktree dont le dossier a disparu', async () => {
    const repo = makeTmpRepo();
    const wtPath = join(dirname(repo), `${basename(repo)}-wt-gone`);
    await addWorktree(repo, { path: wtPath, branch: 'gone', newBranch: true });
    rmSync(wtPath, { recursive: true, force: true }); // suppression "à la main"
    await pruneWorktrees(repo);
    expect((await listWorktrees(repo)).some((w) => resolve(w.path) === resolve(wtPath))).toBe(false);
  });
});
