import 'dart:convert';

import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';

import '../../../core/utils/logger.dart';
import '../db/sqflite_api.dart';
import '../network/api.dart';
import '../../models/user_Info.dart';
import '../../../modules/meeting/model/transcribe_service.dart';
import 'meeting_upload_service.dart';

class MeetingTaskService extends GetxService {
  MeetingUploadService get _uploadService => Get.find<MeetingUploadService>();

  final GetStorage _storage = GetStorage();
  static const String _pendingLocalRecordingTitleStorageKey =
      'meeting_pending_local_recording_titles';

  List _taskList = []; //待处理的会议任务列表

  bool _isTask = false; //是否有正在处理的任务

  RxInt updateListState = 0.obs; //是否更新首页列表
  RxInt localImportState = 0.obs; //是否触发本地录音导入
  int meetingId = 0;
  RxInt tasktype = 1.obs; //任务类型，0-初始，1-等待转写中，2-转写中，3-等待总结中，4-总结中，5-完成
  List textList = [];
  String personnel = '';
  String summary = '';
  String overview = '';

  void setPendingLocalRecordingTitle(String wavFileName, String displayTitle) {
    if (wavFileName.isEmpty) return;
    final data = _storage.read(_pendingLocalRecordingTitleStorageKey);
    final map = (data is Map)
        ? Map<String, dynamic>.from(data)
        : <String, dynamic>{};
    map[wavFileName] = displayTitle;
    _storage.write(_pendingLocalRecordingTitleStorageKey, map);
  }

  String? takePendingLocalRecordingTitle(String wavFileName) {
    if (wavFileName.isEmpty) return null;
    final data = _storage.read(_pendingLocalRecordingTitleStorageKey);
    if (data is! Map) return null;
    final map = Map<String, dynamic>.from(data);
    final v = map.remove(wavFileName);
    if (v == null) return null;
    _storage.write(_pendingLocalRecordingTitleStorageKey, map);
    return v.toString();
  }

  void requestLocalImport() {
    localImportState.value++;
  }

  Future<void> addTask(
    int id,
    String audiourl,
    String formlanguage,
    String tolanguage,
    bool isdistinguishspeaker,
    int templateid,
    String tid,
    TranscribeService serviceType,
  ) async {
    if (audiourl.isEmpty) {
      Map uploadData = _uploadService.uploadList.firstWhere(
        (element) => element['id'] == id,
        orElse: () => {},
      );
      if (uploadData.isNotEmpty) {
        if (uploadData['audiourl'].isEmpty) {
          uploadData['isTask'] = true;
          uploadData['formlanguage'] = formlanguage;
          uploadData['tolanguage'] = tolanguage;
          uploadData['isdistinguishspeaker'] = isdistinguishspeaker;
          uploadData['templateid'] = templateid;
          uploadData['tid'] = tid;
          uploadData['service_type'] = serviceType.value;
        } else {
          await submitTask(
            id,
            formlanguage,
            tolanguage,
            isdistinguishspeaker,
            templateid,
            tid,
            serviceType,
          );
        }
      }
    } else {
      await submitTask(
        id,
        formlanguage,
        tolanguage,
        isdistinguishspeaker,
        templateid,
        tid,
        serviceType,
      );
    }
  }

  Future<void> submitTask(
    int id,
    String formlanguage,
    String tolanguage,
    bool isdistinguishspeaker,
    int templateid,
    String tid,
    TranscribeService serviceType,
  ) async {
    await Api.startTaskEchomeet({
      'id': id,
      'formlanguage': formlanguage,
      'tolanguage': tolanguage,
      'isdistinguishspeaker': isdistinguishspeaker,
      'templateid': templateid,
      'tid': tid,
      'service_type': serviceType.value,
    });
    final seconds = await _getMeetingSeconds(id);
    _decrementMeetingIntegral(cost: seconds);
    _taskList.add({
      'id': id,
      'tasktype': 1,
    });
    await SqfliteApi.editMeetingTitle(
      id,
      {'tasktype': 1},
    );
    updateListState.value++;
    _executeTask();
  }

  Future<void> refreshTask(
    int id,
    int templateid,
    String tid,
    String tolanguage,
    TranscribeService serviceType,
  ) async {
    tasktype.value = 3;
    String oldSummary = '';
    try {
      final data = await SqfliteApi.getMeetingDetails(id);
      oldSummary = (data['details']?['summary'] ?? '').toString();
    } catch (_) {}
    await Api.refreshTaskEchomeet({
      'id': id,
      'templateid': templateid,
      'tid': tid,
      'tolanguage': tolanguage,
      'service_type': serviceType.value,
    });
    _taskList.removeWhere((i) => i['id'] == id);
    _taskList.add({
      'id': id,
      'tasktype': 3,
      'oldSummary': oldSummary,
      'pollAttempts': 0,
    });
    await SqfliteApi.editMeetingTitle(
      id,
      {'tasktype': 3},
    );
    updateListState.value++;
    _executeTask();
  }

  Future<void> readTask(int id) async {
    await Api.readRecordEchomeet({'id': id});
    await SqfliteApi.editMeetingTitle(
      id,
      {'tasktype': 6},
    );
    updateListState.value++;
  }

  void _executeTask() async {
    if (_isTask) return;
    _isTask = true;
    try {
      while (_taskList.isNotEmpty) {
        await Future.delayed(const Duration(seconds: 5));
        try {
          await _queryTask();
        } catch (e, st) {
          Logger.error('MeetingTask polling _queryTask failed: $e\n$st');
        }
      }
    } finally {
      _isTask = false;
    }
  }

  Future<void> removeTask(int id) async {
    _taskList.removeWhere((element) => element['id'] == id);
    await Api.delRecordEchomeet({
      'ids': [id],
    });
  }

  void startTask(List data) {
    _taskList = data;
    _executeTask();
  }

  void stopTask() {
    _taskList.clear();
  }

  Future<void> _queryTask() async {
    if (_taskList.isEmpty) return;
    List ids = _taskList.map((e) => e['id']).toList();
    var response = await Api.getMultitermRecord({
      'ids': ids,
    });
    List queryList = response['records'] ?? [];
    Logger.d(
      'MeetingTask',
      'poll: ids=$ids, server returned ${queryList.length} records, '
          'states=${queryList.map((e) => '${e['id']}:${e['state']}').toList()}',
    );
    for (var element in queryList) {
      int id = element['id'];
      int newTasktype = element['state'];
      Map taskData = _taskList.firstWhere(
        (i) => i['id'] == id,
        orElse: () => {},
      );

      // 重新总结的兜底：服务端有时会立刻回 state>=5 但 summary 还是旧的，
      // 等真正的新内容生成后才更新。这里用提交重总结时记录的 oldSummary
      // 做比对，只要服务端返回的 summary 还跟旧的一样，就当作未完成继续轮询，
      // 避免任务被过早移出 _taskList、polling 停掉之后再也拿不到新内容。
      const int kMaxStaleAttempts = 60; // ~5 分钟（按 5s 间隔）
      if (taskData.isNotEmpty && newTasktype >= 5) {
        final String oldSummary =
            (taskData['oldSummary'] ?? '').toString();
        final String returnedSummary =
            (element['summary'] ?? '').toString();
        int attempts = (taskData['pollAttempts'] ?? 0) as int;
        if (oldSummary.isNotEmpty &&
            returnedSummary == oldSummary &&
            attempts < kMaxStaleAttempts) {
          taskData['pollAttempts'] = attempts + 1;
          Logger.d(
            'MeetingTask',
            're-summary still pending for id=$id '
                '(server reports state=$newTasktype but summary unchanged, '
                'attempt=${attempts + 1})',
          );
          continue;
        }
      }

      if (taskData.isNotEmpty) {
        int oldTasktype = taskData['tasktype'];
        if (oldTasktype != newTasktype) {
          if (oldTasktype < 3 && newTasktype >= 3) {
            // 转写完成
            List<dynamic> decodeList = jsonDecode(element['translate']);
            List<Map<String, Object?>> speakerList =
                decodeList.map((e) => Map<String, Object?>.from(e)).toList();
            await SqfliteApi.deleteMeetingSpeaker(id);
            await SqfliteApi.insertMeetingSpeaker(speakerList);
            await SqfliteApi.editMeeting(
              id,
              {'tasktype': newTasktype},
            );
            if (id == meetingId) {
              List sqlSpeakerList = await SqfliteApi.getMeetingSpeaker(id);
              textList = List.from(sqlSpeakerList);
              tasktype.value = newTasktype;
            }
          }
          if (oldTasktype < 5 && newTasktype >= 5) {
            // 总结完成
            // 重新总结场景下 translate 也会被服务端按新目标语言重写，
            // 必须把它落进 meetingspeaker 表，否则转写 tab 仍然显示旧语言。
            final translateField = element['translate'];
            bool translateRefreshed = false;
            Logger.d(
              'MeetingTask',
              'summary complete for id=$id: '
                  'translate ${translateField == null ? 'MISSING' : 'len=${translateField.toString().length}'}, '
                  'available element keys=${element.keys.toList()}',
            );
            if (translateField != null &&
                translateField.toString().isNotEmpty) {
              try {
                List<dynamic> decodeList = jsonDecode(translateField);
                List<Map<String, Object?>> speakerList = decodeList
                    .map((e) => Map<String, Object?>.from(e))
                    .toList();
                await SqfliteApi.deleteMeetingSpeaker(id);
                await SqfliteApi.insertMeetingSpeaker(speakerList);
                translateRefreshed = true;
              } catch (e) {
                Logger.error(
                  'MeetingTask: failed to refresh meetingspeaker on '
                  'summary complete for id=$id: $e',
                );
              }
            }
            await SqfliteApi.editMeeting(id, {
              'tasktype': newTasktype,
              'personnel': element['personnel'] ?? '',
              'summary': element['summary'] ?? '',
              'overview': element['overview'] ?? '',
            });

            // 兜底：如果 polling 响应没带 translate（服务端可能在
            // /echomeet_getrecords 里不返回完整字段），主动去
            // /echomeet_getallrecords 拉一次，把新翻译同步到本地 DB。
            if (!translateRefreshed) {
              Logger.d(
                'MeetingTask',
                'translate missing from polling response; '
                    'triggering full sync to fetch new speakers for id=$id',
              );
              try {
                var allResp = await Api.getOperationAllRecord();
                List allRecords = allResp['records'] ?? [];
                final fullRecord = allRecords.firstWhere(
                  (r) => r['id'] == id,
                  orElse: () => null,
                );
                if (fullRecord != null &&
                    fullRecord['translate'] != null &&
                    fullRecord['translate'].toString().isNotEmpty) {
                  List<dynamic> decodeList =
                      jsonDecode(fullRecord['translate']);
                  List<Map<String, Object?>> speakerList = decodeList
                      .map((e) => Map<String, Object?>.from(e))
                      .toList();
                  await SqfliteApi.deleteMeetingSpeaker(id);
                  await SqfliteApi.insertMeetingSpeaker(speakerList);
                  await SqfliteApi.editMeeting(id, {
                    'personnel': fullRecord['personnel'] ?? '',
                    'summary': fullRecord['summary'] ?? '',
                    'overview': fullRecord['overview'] ?? '',
                  });
                  Logger.d(
                    'MeetingTask',
                    'full sync wrote ${speakerList.length} speaker rows '
                        'for id=$id',
                  );
                }
              } catch (e) {
                Logger.error(
                  'MeetingTask: fallback full sync failed for id=$id: $e',
                );
              }
            }

            if (id == meetingId) {
              personnel = element['personnel'] ?? '';
              summary = element['summary'] ?? '';
              overview = element['overview'] ?? '';
              tasktype.value = newTasktype;
            }
          }
          await SqfliteApi.editMeetingTitle(
            id,
            {'tasktype': newTasktype},
          );
          taskData['tasktype'] = newTasktype;
          updateListState.value++;
        }
      }
      if (newTasktype >= 5) {
        _taskList.removeWhere((i) => i['id'] == id);
      }
    }
  }

  /// 获取会议音频秒数
  Future<int> _getMeetingSeconds(int id) async {
    try {
      final data = await SqfliteApi.getMeetingDetails(id);
      final v = data['seconds'];
      if (v is int) return v;
      if (v is num) return v.toInt();
      if (v is String) return int.tryParse(v) ?? 0;
      return 0;
    } catch (_) {
      return 0;
    }
  }

  /// 减少用户会议积分
  void _decrementMeetingIntegral({required int cost}) {
    if (!User.isLoggedIn()) return;
    if (cost <= 0) return;
    final next = User.instance.meetintegral - cost;
    User.instance.updateUserInfo({'meetintegral': next < 0 ? 0 : next});
    //GetStorage().write('user_info', User.instance.toJson());
  }
}