/// Unit tests for `ProjectManager` and `RecentProject` in
/// `lib/kernel/src/project.dart`. Uses an injected `onValidateProject`
/// hook so the manager doesn't shell out to git in tests.
library;

import 'dart:convert';
import 'dart:io';

import 'package:clide/kernel/kernel.dart';
import 'package:test/test.dart';

Future<ProjectManager> _build({
  Future<String?> Function(String path)? onValidateProject,
  Future<void> Function(String path)? onProjectOpen,
  Map<String, Object?> initialSettings = const {},
}) async {
  final tmp = await Directory.systemTemp.createTemp('clide-project-test-');
  final settings = SettingsStore(appDir: tmp);
  await settings.load();
  for (final entry in initialSettings.entries) {
    await settings.set<Object>(entry.key, entry.value!);
  }
  final toolchain = Toolchain();
  toolchain.applyResolved(const ResolvedPaths(git: '/usr/bin/git'));
  final pm = ProjectManager(
    log: Logger(minLevel: LogLevel.error),
    events: DaemonBus(),
    settings: settings,
    toolchain: toolchain,
    onValidateProject: onValidateProject,
    onProjectOpen: onProjectOpen,
  );
  addTearDown(() async {
    if (tmp.existsSync()) tmp.deleteSync(recursive: true);
  });
  return pm;
}

void main() {
  group('RecentProject', () {
    test(r'relativePath collapses $HOME prefix to ~', () {
      final home = Platform.environment['HOME'] ?? '';
      if (home.isEmpty) return;
      final p = RecentProject(path: '$home/projects/clide', name: 'clide', lastOpened: DateTime.now());
      expect(p.relativePath, startsWith('~/'));
    });

    test(r'relativePath returns the absolute path when not under $HOME', () {
      final p = RecentProject(path: '/elsewhere/repo', name: 'repo', lastOpened: DateTime.now());
      // If $HOME is /elsewhere... we'd collapse. Otherwise absolute is preserved.
      if (!'/elsewhere/repo'.startsWith(Platform.environment['HOME'] ?? ' ')) {
        expect(p.relativePath, '/elsewhere/repo');
      }
    });

    test('timeAgo buckets walk minutes → hours → days → weeks → months', () {
      final now = DateTime.now();
      RecentProject pq(Duration ago) => RecentProject(path: '/p', name: 'p', lastOpened: now.subtract(ago));
      expect(pq(const Duration(seconds: 10)).timeAgo, 'just now');
      expect(pq(const Duration(minutes: 5)).timeAgo, contains('min'));
      expect(pq(const Duration(hours: 3)).timeAgo, contains('hours'));
      expect(pq(const Duration(days: 1, hours: 1)).timeAgo, 'yesterday');
      expect(pq(const Duration(days: 3)).timeAgo, contains('days'));
      expect(pq(const Duration(days: 14)).timeAgo, contains('weeks'));
      expect(pq(const Duration(days: 90)).timeAgo, contains('months'));
    });

    test('toJson / fromJson round-trip', () {
      final p = RecentProject(path: '/p', name: 'p', branch: 'main', lastOpened: DateTime.utc(2026, 5, 1, 12));
      final back = RecentProject.fromJson(p.toJson());
      expect(back.path, '/p');
      expect(back.name, 'p');
      expect(back.branch, 'main');
      expect(back.lastOpened, p.lastOpened);
    });

    test('remote recent round-trips host/port/user and stays remote (T-332)', () {
      final p = RecentProject(path: '/srv/repo', name: 'repo', lastOpened: DateTime.utc(2026, 6, 1), host: 'buildbox', port: 2222, user: 'jeroen');
      expect(p.isRemote, isTrue);
      final json = p.toJson();
      expect(json['host'], 'buildbox');
      final back = RecentProject.fromJson(json);
      expect(back.host, 'buildbox');
      expect(back.port, 2222);
      expect(back.user, 'jeroen');
      expect(back.isRemote, isTrue);
      expect(back.ref, WorkspaceRef.remote(host: 'buildbox', path: '/srv/repo', port: 2222, user: 'jeroen'));
      // sticky toggles must not drop the host identity
      expect(back.copyWith(startupSticky: true).host, 'buildbox');
    });

    test('local recent serializes without host keys and deserializes local (back-compat)', () {
      final p = RecentProject(path: '/p', name: 'p', lastOpened: DateTime.utc(2026, 6, 1));
      expect(p.isRemote, isFalse);
      expect(p.toJson().containsKey('host'), isFalse);
      // A pre-T-332 persisted recent has no host/port/user keys at all.
      final old = RecentProject.fromJson(const {'path': '/p', 'name': 'p'});
      expect(old.isRemote, isFalse);
      expect(old.ref, const WorkspaceRef.local('/p'));
    });

    test('relativePath shows host:path for remote recents, never ~-collapses', () {
      final home = Platform.environment['HOME'] ?? '/home/x';
      final p = RecentProject(path: '$home/repo', name: 'repo', lastOpened: DateTime.now(), host: 'buildbox');
      expect(p.relativePath, 'buildbox:$home/repo');
    });

    test('fromJson tolerates missing/invalid fields', () {
      final r = RecentProject.fromJson(const {});
      expect(r.path, '');
      expect(r.name, '');
      expect(r.branch, isNull);
    });
  });

  group('ProjectManager', () {
    test('open() with a non-git path returns false and leaves _current null', () async {
      final pm = await _build(onValidateProject: (_) async => null);
      expect(await pm.open('/tmp/not-a-git-repo'), isFalse);
      expect(pm.isOpen, isFalse);
    });

    test('open() with a valid path sets current + emits ProjectOpened', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (_) async => sandbox.path);
      expect(await pm.open(sandbox.path), isTrue);
      expect(pm.isOpen, isTrue);
      expect(pm.current?.path, sandbox.path);
    });

    test('open() inserts the project into recents (newest first)', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (_) async => sandbox.path);
      await pm.open(sandbox.path);
      expect(pm.recents, hasLength(1));
      expect(pm.recents.first.path, sandbox.path);
    });

    test('opening the same path twice deduplicates and bumps it to the top', () async {
      final a = await Directory.systemTemp.createTemp('clide-pm-a-');
      final b = await Directory.systemTemp.createTemp('clide-pm-b-');
      addTearDown(() {
        a.deleteSync(recursive: true);
        b.deleteSync(recursive: true);
      });
      final pm = await _build(onValidateProject: (p) async => p);
      await pm.open(a.path);
      await pm.open(b.path);
      await pm.open(a.path); // re-open a → moves to front
      expect(pm.recents.map((r) => r.path), [a.path, b.path]);
    });

    test('recents is capped at 10', () async {
      final dirs = [for (var i = 0; i < 12; i++) await Directory.systemTemp.createTemp('clide-pm-$i-')];
      addTearDown(() {
        for (final d in dirs) {
          if (d.existsSync()) d.deleteSync(recursive: true);
        }
      });
      final pm = await _build(onValidateProject: (p) async => p);
      for (final d in dirs) {
        await pm.open(d.path);
      }
      expect(pm.recents, hasLength(10));
    });

    test('close() resets _current and emits ProjectClosed', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (_) async => sandbox.path);
      await pm.open(sandbox.path);
      await pm.close();
      expect(pm.isOpen, isFalse);
      // close on an already-closed manager is a no-op.
      await pm.close();
    });

    test('loadRecents reads the serialised list from settings', () async {
      final earlier = RecentProject(path: '/p', name: 'p', lastOpened: DateTime.utc(2026, 1, 1));
      final pm = await _build(
        initialSettings: {
          'app.recentProjects': jsonEncode([earlier.toJson()]),
        },
      );
      await pm.loadRecents();
      expect(pm.recents, hasLength(1));
      expect(pm.recents.first.path, '/p');
    });

    test('loadRecents tolerates a malformed value', () async {
      final pm = await _build(initialSettings: {'app.recentProjects': '{not json'});
      await pm.loadRecents();
      expect(pm.recents, isEmpty);
    });

    test('loadRecents with no setting clears to empty', () async {
      final pm = await _build();
      await pm.loadRecents();
      expect(pm.recents, isEmpty);
    });

    test('openLast returns false when no last-project is stored', () async {
      final pm = await _build();
      expect(await pm.openLast(), isFalse);
    });

    test('openLast returns false when the stored path no longer exists', () async {
      final pm = await _build(initialSettings: {'app.lastProject': '/tmp/clide-no-such-${DateTime.now().microsecondsSinceEpoch}'});
      expect(await pm.openLast(), isFalse);
    });

    test('openLast re-opens the stored project when it still exists', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-last-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(initialSettings: {'app.lastProject': sandbox.path}, onValidateProject: (_) async => sandbox.path);
      expect(await pm.openLast(), isTrue);
      expect(pm.current?.path, sandbox.path);
    });

    test('resolveProject without an injected validator falls back to Process.run', () async {
      // No onValidateProject → uses Toolchain.git. With a real git in a tempdir
      // that's not a repo, returns null.
      final pm = await _build();
      final notRepo = await Directory.systemTemp.createTemp('clide-pm-not-');
      addTearDown(() => notRepo.deleteSync(recursive: true));
      expect(await pm.resolveProject(notRepo.path), isNull);
    });

    test('stickyProjectPath is null with zero sticky recents', () async {
      final pm = await _build();
      expect(pm.stickyProjectPath, isNull);
    });

    test('setStickyStartup is a no-op for an unknown path', () async {
      final pm = await _build();
      await pm.setStickyStartup('/nope', true);
      expect(pm.stickyProjectPath, isNull);
    });

    test('setStickyStartup flips, persists, and notifies listeners', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-sticky-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (_) async => sandbox.path);
      expect(await pm.open(sandbox.path), isTrue);
      var calls = 0;
      pm.addListener(() => calls++);
      await pm.setStickyStartup(sandbox.path, true);
      expect(pm.isStickyStartup(sandbox.path), isTrue);
      expect(pm.stickyProjectPath, sandbox.path);
      expect(calls, 1);
      // Idempotent — second call with same value does nothing.
      await pm.setStickyStartup(sandbox.path, true);
      expect(calls, 1);
      // Flip back.
      await pm.setStickyStartup(sandbox.path, false);
      expect(pm.isStickyStartup(sandbox.path), isFalse);
      expect(pm.stickyProjectPath, isNull);
    });

    test('sticky flag survives a reopen of the same project', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-sticky-reopen-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (_) async => sandbox.path);
      await pm.open(sandbox.path);
      await pm.setStickyStartup(sandbox.path, true);
      // Reopen — sticky must persist.
      await pm.open(sandbox.path);
      expect(pm.isStickyStartup(sandbox.path), isTrue);
    });

    test('stickyProjectPath is null when two recents are sticky', () async {
      final a = await Directory.systemTemp.createTemp('clide-pm-sticky-a-');
      final b = await Directory.systemTemp.createTemp('clide-pm-sticky-b-');
      addTearDown(() => a.deleteSync(recursive: true));
      addTearDown(() => b.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (p) async => p);
      await pm.open(a.path);
      await pm.open(b.path);
      await pm.setStickyStartup(a.path, true);
      await pm.setStickyStartup(b.path, true);
      // Ambiguous — picker should still show.
      expect(pm.stickyProjectPath, isNull);
    });

    test('openStickyOrNothing returns false when none sticky', () async {
      final pm = await _build();
      expect(await pm.openStickyOrNothing(), isFalse);
    });

    test('openStickyOrNothing opens the lone sticky project', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-open-sticky-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final pm = await _build(onValidateProject: (_) async => sandbox.path);
      await pm.open(sandbox.path);
      await pm.setStickyStartup(sandbox.path, true);
      // Close, then reload from settings to simulate boot.
      await pm.close();
      final pm2 = await _build(
        onValidateProject: (_) async => sandbox.path,
        initialSettings: {
          'app.recentProjects': jsonEncode([
            {'path': sandbox.path, 'name': 'pm-open-sticky', 'lastOpened': DateTime.now().toIso8601String(), 'startupSticky': true},
          ]),
        },
      );
      await pm2.loadRecents();
      expect(await pm2.openStickyOrNothing(), isTrue);
      expect(pm2.current?.path, sandbox.path);
    });

    test('open() awaits the onProjectOpen hook with the resolved root', () async {
      final sandbox = await Directory.systemTemp.createTemp('clide-pm-onopen-');
      addTearDown(() => sandbox.deleteSync(recursive: true));
      final seen = <String>[];
      final pm = await _build(onValidateProject: (_) async => sandbox.path, onProjectOpen: (path) async => seen.add(path));
      expect(await pm.open(sandbox.path), isTrue);
      expect(seen, [sandbox.path]);
    });

    test('startupSticky round-trips through toJson/fromJson', () {
      final p = RecentProject(path: '/p', name: 'p', lastOpened: DateTime.now(), startupSticky: true);
      final j = p.toJson();
      expect(j['startupSticky'], isTrue);
      final p2 = RecentProject.fromJson(j);
      expect(p2.startupSticky, isTrue);
      // Default (not sticky) omits the key for cleaner JSON.
      final q = RecentProject(path: '/q', name: 'q', lastOpened: DateTime.now());
      expect(q.toJson().containsKey('startupSticky'), isFalse);
    });
  });
}