import 'dart:io';

import 'package:clide/clide.dart';
import 'package:clide/src/daemon/editor_commands.dart';
import 'package:clide/src/editor/registry.dart';
import 'package:test/test.dart';

void main() {
  late Directory sandbox;
  late DaemonDispatcher dispatcher;
  late EditorRegistry reg;

  setUp(() async {
    sandbox = await Directory.systemTemp.createTemp('clide-ed-cmd-test-');
    await File('${sandbox.path}/doc.md').writeAsString('alpha beta');
    final sink = RecordingEventSink();
    reg = EditorRegistry(events: sink, workspaceRoot: sandbox);
    dispatcher = DaemonDispatcher();
    registerEditorCommands(dispatcher, reg);
  });

  tearDown(() async {
    await reg.shutdown();
    if (sandbox.existsSync()) sandbox.deleteSync(recursive: true);
  });

  Future<IpcResponse> call(String cmd, [Map<String, Object?> args = const {}]) {
    return dispatcher.dispatch(IpcRequest(id: '1', cmd: cmd, args: args));
  }

  test('editor.open requires a path', () async {
    final r = await call('editor.open');
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'user_error');
  });

  test('editor.open + editor.active round-trip', () async {
    final open = await call('editor.open', {'path': 'doc.md'});
    expect(open.ok, isTrue);
    final id = open.data['id']! as String;
    expect(id, startsWith('b_'));

    final active = await call('editor.active');
    expect(active.ok, isTrue);
    final act = active.data['active']! as Map;
    expect(act['id'], id);
    expect(act['path'], 'doc.md');
  });

  test('CLI positional path binds to editor.open (T-232)', () async {
    // The C client sends the argv shape {positional:[...]}; the registered
    // schema's normalize must map positional[0] -> path so the handler opens
    // it (rather than returning "path is required").
    final r = await call('editor.open', {
      'positional': ['doc.md'],
    });
    expect(r.ok, isTrue, reason: r.error?.message);
    expect(r.data['path'], 'doc.md');
  });

  test('CLI --line flag coerces to a number and binds (T-232)', () async {
    final r = await call('editor.open', {
      'positional': ['doc.md'],
      'flags': {'line': '1'},
    });
    expect(r.ok, isTrue, reason: r.error?.message);
    expect(r.data['path'], 'doc.md');
  });

  test('editor.open with a 1-based line jumps the initial selection (T-52)', () async {
    await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\nthree\n');
    final r = await call('editor.open', {'path': 'multi.txt', 'line': 3});
    expect(r.ok, isTrue);
    final sel = r.data['selection'] as Map;
    // Line 3 starts after 'one\n' + 'two\n' = 8 characters.
    expect(sel['start'], 8);
    expect(sel['end'], 8);
  });

  test('editor.open without a line opens at the top', () async {
    await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\n');
    final r = await call('editor.open', {'path': 'multi.txt'});
    expect((r.data['selection'] as Map)['start'], 0);
  });

  test('editor.open with an out-of-range line clamps to the content end', () async {
    await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\n'); // 8 chars
    final r = await call('editor.open', {'path': 'multi.txt', 'line': 999});
    expect((r.data['selection'] as Map)['start'], 8);
  });

  test('editor.goto-line jumps the active buffer to a 1-based line (T-407)', () async {
    await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\nthree\n');
    await call('editor.open', {'path': 'multi.txt'});
    final r = await call('editor.goto-line', {'line': 3});
    expect(r.ok, isTrue, reason: r.error?.message);
    expect(r.data['line'], 3);
    // Line 3 starts after 'one\n' + 'two\n' = 8 characters.
    final read = await call('editor.read');
    expect((read.data['selection'] as Map)['start'], 8);
  });

  test('editor.goto-line clamps an out-of-range line to the content end', () async {
    await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\n'); // 8 chars
    await call('editor.open', {'path': 'multi.txt'});
    final r = await call('editor.goto-line', {'line': 999});
    expect(r.ok, isTrue);
    final read = await call('editor.read');
    expect((read.data['selection'] as Map)['start'], 8);
  });

  test('editor.goto-line rejects a non-positive line', () async {
    await call('editor.open', {'path': 'doc.md'});
    final r = await call('editor.goto-line', {'line': 0});
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'user_error');
  });

  test('editor.goto-line with no active buffer is not-found', () async {
    final r = await call('editor.goto-line', {'line': 2});
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'not_found');
  });

  test('CLI positional line binds to editor.goto-line (T-232)', () async {
    await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\nthree\n');
    await call('editor.open', {'path': 'multi.txt'});
    final r = await call('editor.goto-line', {
      'positional': ['2'],
    });
    expect(r.ok, isTrue, reason: r.error?.message);
    expect(r.data['line'], 2);
  });

  test('editor.insert without id targets the active buffer', () async {
    await call('editor.open', {'path': 'doc.md'});
    final r = await call('editor.insert', {'text': 'X '});
    expect(r.ok, isTrue);
    expect(r.data['inserted'], 2);

    final read = await call('editor.read');
    expect((read.data['content'] as String).startsWith('X '), isTrue);
  });

  test('editor.replace-selection swaps selected range', () async {
    final open = await call('editor.open', {'path': 'doc.md'});
    final id = open.data['id'] as String?;

    await call('editor.set-selection', {
      'id': id,
      'selection': {'start': 0, 'end': 5}, // 'alpha'
    });
    final r = await call('editor.replace-selection', {'text': 'gamma'});
    expect(r.ok, isTrue);

    final read = await call('editor.read');
    expect(read.data['content'], 'gamma beta');
  });

  test('editor.save persists to disk', () async {
    await call('editor.open', {'path': 'doc.md'});
    await call('editor.insert', {'text': 'Z '});
    final save = await call('editor.save');
    expect(save.ok, isTrue);
    final disk = await File('${sandbox.path}/doc.md').readAsString();
    expect(disk.startsWith('Z '), isTrue);
  });

  test('editor.close removes the buffer', () async {
    final open = await call('editor.open', {'path': 'doc.md'});
    final id = open.data['id'] as String?;
    final r = await call('editor.close', {'id': id});
    expect(r.ok, isTrue);
    final list = await call('editor.list');
    expect((list.data['buffers'] as List), isEmpty);
  });

  test('editor.list includes all open buffers', () async {
    await File('${sandbox.path}/a.md').writeAsString('a');
    await File('${sandbox.path}/b.md').writeAsString('b');
    await call('editor.open', {'path': 'a.md'});
    await call('editor.open', {'path': 'b.md'});
    final r = await call('editor.list');
    final names = [for (final b in (r.data['buffers'] as List).cast<Map>()) b['path']];
    expect(names, containsAll(['a.md', 'b.md']));
  });

  test('insert on unknown id returns not-found', () async {
    final r = await call('editor.insert', {'id': 'b_404', 'text': 'x'});
    expect(r.ok, isFalse);
    expect(r.error!.code, IpcExitCode.notFound);
  });

  test('editor.open returns toolError for an unreadable path', () async {
    // Create a file then chmod 000 so reading fails with a FileSystemException.
    final unreadable = File('${sandbox.path}/locked.md');
    await unreadable.writeAsString('x');
    await Process.run('chmod', ['000', unreadable.path]);
    addTearDown(() async {
      await Process.run('chmod', ['644', unreadable.path]);
    });
    final r = await call('editor.open', {'path': 'locked.md'});
    expect(r.ok, isFalse);
    // Either errno-mapped or toolError — either is acceptable.
    expect(r.error!.code, isNot(IpcExitCode.notFound));
  });

  test('editor.active returns null when no buffer is open', () async {
    final r = await call('editor.active');
    expect(r.ok, isTrue);
    expect(r.data['active'], isNull);
  });

  test('editor.activate requires id and validates it', () async {
    final missing = await call('editor.activate');
    expect(missing.ok, isFalse);
    expect(missing.error!.kind, 'user_error');
    final unknown = await call('editor.activate', {'id': 'b_404'});
    expect(unknown.ok, isFalse);
    expect(unknown.error!.kind, 'not_found');
  });

  test('editor.activate flips the active buffer to the requested one', () async {
    await File('${sandbox.path}/a.md').writeAsString('a');
    await File('${sandbox.path}/b.md').writeAsString('b');
    final a = await call('editor.open', {'path': 'a.md'});
    await call('editor.open', {'path': 'b.md'});
    final r = await call('editor.activate', {'id': a.data['id']});
    expect(r.ok, isTrue);
    expect(r.data['active'], a.data['id']);
  });

  test('editor.read with no active buffer and no id returns not-found', () async {
    final r = await call('editor.read');
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'not_found');
  });

  test('editor.read with an unknown id returns not-found', () async {
    final r = await call('editor.read', {'id': 'b_404'});
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'not_found');
  });

  test('editor.set-selection clamps and applies', () async {
    await call('editor.open', {'path': 'doc.md'});
    final r = await call('editor.set-selection', {
      'selection': {'start': 0, 'end': 3},
    });
    expect(r.ok, isTrue);
  });

  test('editor.set-selection without an id or active buffer returns not-found', () async {
    final r = await call('editor.set-selection', {
      'selection': {'start': 0, 'end': 1},
    });
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'not_found');
  });

  test('editor.set-content overwrites the buffer (with and without selection)', () async {
    await call('editor.open', {'path': 'doc.md'});
    final r1 = await call('editor.set-content', {'text': 'replaced'});
    expect(r1.ok, isTrue);
    expect(r1.data['length'], 'replaced'.length);
    final read1 = await call('editor.read');
    expect(read1.data['content'], 'replaced');
    final r2 = await call('editor.set-content', {
      'text': 'short',
      'selection': {'start': 1, 'end': 99},
    });
    expect(r2.ok, isTrue);
  });

  test('editor.save with no active buffer returns not-found', () async {
    final r = await call('editor.save');
    expect(r.ok, isFalse);
    expect(r.error!.kind, 'not_found');
  });

  test('editor.close requires id and validates it', () async {
    final missing = await call('editor.close');
    expect(missing.ok, isFalse);
    expect(missing.error!.kind, 'user_error');
    final unknown = await call('editor.close', {'id': 'b_404'});
    expect(unknown.ok, isFalse);
    expect(unknown.error!.kind, 'not_found');
  });

  test('insert / replace / set-content / save with no active buffer all return not-found', () async {
    for (final cmd in ['editor.insert', 'editor.replace-selection', 'editor.set-content', 'editor.save']) {
      final r = await call(cmd, {'text': 'x'});
      expect(r.ok, isFalse, reason: cmd);
      expect(r.error!.kind, 'not_found', reason: cmd);
    }
  });
}