import 'dart:async';
import 'dart:io';

import 'package:audioplayers/audioplayers.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/services.dart';
import 'package:geolocator/geolocator.dart';
import 'package:path_provider/path_provider.dart';
import 'package:record/record.dart';

import '../api/oa_client.dart';

/// 系统截屏、高刷、录音、选图（保留 GIF）。
class DeviceBridge {
  DeviceBridge._();
  static const _ch = EventChannel('com.fysxkj.oa/device');
  static const _m = MethodChannel('com.fysxkj.oa/ota');
  static StreamSubscription<dynamic>? _sub;
  static final _cbs = <void Function()>{};

  static final AudioPlayer _player = AudioPlayer();
  static final AudioRecorder _recorder = AudioRecorder();
  static String? _recordingPath;
  static DateTime? _recordingStarted;
  static String? _playingPath;
  static OaClient? _api;

  static void bindApi(OaClient api) => _api = api;

  static bool get _useNativeBridge => Platform.isAndroid;

  static Future<void> preferMaxRefresh() async {
    if (!_useNativeBridge) return;
    try {
      await _m.invokeMethod('preferMaxRefresh');
    } catch (_) {}
  }

  static Timer? _clipPoll;
  static bool _clipHadImage = false;
  static int _lastClipAt = 0;

  static void watchScreenshot(void Function() onShot) {
    _cbs.add(onShot);
    if (Platform.isAndroid || Platform.isWindows) {
      _sub ??= _ch.receiveBroadcastStream().listen((event) {
        if (event == 'screenshot') {
          for (final cb in [..._cbs]) {
            cb();
          }
        }
      });
      _m.invokeMethod('startScreenshotWatch').catchError((_) {});
    } else if (Platform.isLinux) {
      _startLinuxScreenshotPoll();
    }
  }

  static void _startLinuxScreenshotPoll() {
    _clipPoll ??= Timer.periodic(const Duration(milliseconds: 900), (_) async {
      final now = DateTime.now().millisecondsSinceEpoch;
      if (now - _lastClipAt < 1500) return;
      final has = await _linuxClipboardHasImage();
      if (has && !_clipHadImage) {
        _clipHadImage = true;
        _lastClipAt = now;
        for (final cb in [..._cbs]) {
          cb();
        }
      } else if (!has) {
        _clipHadImage = false;
      }
    });
  }

  static Future<bool> _linuxClipboardHasImage() async {
    try {
      final x = await Process.run('bash', [
        '-c',
        'command -v xclip >/dev/null && xclip -selection clipboard -t TARGETS -o 2>/dev/null | grep -qi image && echo 1; '
            'command -v wl-paste >/dev/null && wl-paste --list-types 2>/dev/null | grep -qi image && echo 1',
      ]);
      return '${x.stdout}'.contains('1');
    } catch (_) {
      return false;
    }
  }

  static void unwatchScreenshot(void Function() onShot) {
    _cbs.remove(onShot);
    if (_cbs.isNotEmpty) return;
    if (Platform.isAndroid || Platform.isWindows) {
      _m.invokeMethod('stopScreenshotWatch').catchError((_) {});
      _sub?.cancel();
      _sub = null;
    }
    _clipPoll?.cancel();
    _clipPoll = null;
    _clipHadImage = false;
  }

  static Future<void> startVoice() async {
    if (_useNativeBridge) {
      await _m.invokeMethod('startVoice');
      return;
    }
    if (!await _recorder.hasPermission()) {
      throw Exception('没有麦克风权限');
    }
    final dir = await getTemporaryDirectory();
    _recordingPath = '${dir.path}/voice_${DateTime.now().millisecondsSinceEpoch}.m4a';
    _recordingStarted = DateTime.now();
    await _recorder.start(const RecordConfig(encoder: AudioEncoder.aacLc), path: _recordingPath!);
  }

  static Future<Map<String, dynamic>?> stopVoice() async {
    if (_useNativeBridge) {
      final raw = await _m.invokeMethod('stopVoice');
      if (raw is Map) return Map<String, dynamic>.from(raw);
      return null;
    }
    final path = await _recorder.stop();
    _recordingPath = null;
    if (path == null || path.isEmpty) return null;
    final started = _recordingStarted;
    _recordingStarted = null;
    final seconds = started == null ? 1 : DateTime.now().difference(started).inSeconds.clamp(1, 60);
    return {'path': path, 'seconds': seconds};
  }

  static Future<void> cancelVoice() async {
    if (_useNativeBridge) {
      try {
        await _m.invokeMethod('cancelVoice');
      } catch (_) {}
      return;
    }
    try {
      await _recorder.stop();
    } catch (_) {}
    _recordingPath = null;
    _recordingStarted = null;
  }

  static Future<void> playVoice(String path) async {
    if (_useNativeBridge) {
      await _m.invokeMethod('playVoice', {'path': path});
      return;
    }
    await _player.stop();
    _playingPath = path;
    await _player.play(DeviceFileSource(path));
  }

  static Future<void> stopPlay() async {
    if (_useNativeBridge) {
      try {
        await _m.invokeMethod('stopPlay');
      } catch (_) {}
      return;
    }
    await _player.stop();
    _playingPath = null;
  }

  static String? get playingPath => _playingPath;

  /// 手机端本地语音转文字（不调 OA 服务端）。
  static Future<String?> speechToText({required String audioPath}) async {
    if (!_useNativeBridge) return null;
    final value = await _m.invokeMethod('speechToText', {'path': audioPath});
    final text = '$value'.trim();
    return value == null || text.isEmpty || text == 'null' ? null : text;
  }

  static final AudioPlayer _tonePlayer = AudioPlayer();

  static Future<void> startCallTone({bool incoming = false}) async {
    if (_useNativeBridge) {
      try {
        await _m.invokeMethod('startCallTone', {'incoming': incoming});
      } catch (_) {}
      return;
    }
    try {
      await _tonePlayer.setReleaseMode(ReleaseMode.loop);
      await _tonePlayer.play(AssetSource('sounds/ring.wav'));
    } catch (_) {}
  }

  static Future<void> stopCallTone() async {
    if (_useNativeBridge) {
      try {
        await _m.invokeMethod('stopCallTone');
      } catch (_) {}
      return;
    }
    try {
      await _tonePlayer.stop();
    } catch (_) {}
  }

  static Future<void> cancelCallNotification() async {
    if (!_useNativeBridge) return;
    try {
      await _m.invokeMethod('cancelCallNotification');
    } catch (_) {}
  }

  static Future<void> playMessageSent() async {
    if (!_useNativeBridge) return;
    try {
      await _m.invokeMethod('playMessageSent');
    } catch (_) {}
  }

  static Future<Map<String, double>?> getLocation() async {
    if (_useNativeBridge) {
      final raw = await _m.invokeMethod('getLocation');
      if (raw is Map) {
        final lat = (raw['lat'] as num?)?.toDouble();
        final lng = (raw['lng'] as num?)?.toDouble();
        if (lat != null && lng != null) return {'lat': lat, 'lng': lng};
      }
      return null;
    }
    try {
      final serviceEnabled = await Geolocator.isLocationServiceEnabled();
      if (!serviceEnabled) return null;
      var perm = await Geolocator.checkPermission();
      if (perm == LocationPermission.denied) {
        perm = await Geolocator.requestPermission();
      }
      if (perm == LocationPermission.denied || perm == LocationPermission.deniedForever) {
        return null;
      }
      final pos = await Geolocator.getCurrentPosition(locationSettings: const LocationSettings(accuracy: LocationAccuracy.high));
      return {'lat': pos.latitude, 'lng': pos.longitude};
    } catch (_) {
      return null;
    }
  }

  static Future<Map<String, String>?> pickFile() async {
    if (_useNativeBridge) {
      final raw = await _m.invokeMethod('pickFile');
      if (raw is Map) return raw.map((k, v) => MapEntry('$k', '$v'));
      return null;
    }
    final picked = await FilePicker.platform.pickFiles(allowMultiple: false);
    if (picked == null || picked.files.isEmpty) return null;
    final f = picked.files.first;
    final path = f.path;
    if (path == null || path.isEmpty) return null;
    return {'path': path, 'name': f.name, 'mime': f.extension ?? ''};
  }

  static Future<void> openFile(String path, {String? mime}) async {
    if (_useNativeBridge) {
      await _m.invokeMethod('openFile', {'path': path, 'mime': mime ?? ''});
      return;
    }
    if (Platform.isLinux) {
      await Process.run('xdg-open', [path]);
    } else if (Platform.isWindows) {
      await Process.start('cmd', ['/c', 'start', '', path], mode: ProcessStartMode.detached);
    }
  }

  static Future<void> saveImage(String path) async {
    if (_useNativeBridge) {
      await _m.invokeMethod('saveImage', {'path': path});
      return;
    }
    final name = path.split('/').last;
    final picked = await FilePicker.platform.saveFile(dialogTitle: '保存图片', fileName: name.isEmpty ? 'image.jpg' : name);
    if (picked == null || picked.isEmpty) return;
    await File(path).copy(picked);
  }

  static Future<void> openUrl(String url) async {
    if (_useNativeBridge) {
      await _m.invokeMethod('openUrl', {'url': url});
      return;
    }
    if (Platform.isLinux) {
      await Process.run('xdg-open', [url]);
    } else if (Platform.isWindows) {
      await Process.start('cmd', ['/c', 'start', '', url], mode: ProcessStartMode.detached);
    }
  }

  static Future<bool> requestCallMedia() async {
    if (!_useNativeBridge) return true;
    try {
      final ok = await _m.invokeMethod('requestCallMedia');
      return ok == true;
    } catch (_) {
      return true;
    }
  }

  static Future<Map<String, String>?> pickMedia() async {
    if (_useNativeBridge) {
      final raw = await _m.invokeMethod('pickMedia');
      if (raw is Map) return raw.map((k, v) => MapEntry('$k', '$v'));
      return null;
    }
    final picked = await FilePicker.platform.pickFiles(
      type: FileType.custom,
      allowedExtensions: ['jpg', 'jpeg', 'png', 'gif', 'webp', 'bmp'],
      allowMultiple: false,
    );
    if (picked == null || picked.files.isEmpty) return null;
    final f = picked.files.first;
    final path = f.path;
    if (path == null || path.isEmpty) return null;
    final ext = (f.extension ?? 'jpg').toLowerCase();
    final mime = ext == 'png'
        ? 'image/png'
        : ext == 'gif'
            ? 'image/gif'
            : ext == 'webp'
                ? 'image/webp'
                : 'image/jpeg';
    return {'path': path, 'name': f.name, 'mime': mime};
  }
}