import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:get_it/get_it.dart';
import '../../../../core/app/app_user_cubit.dart';
import '../../../../core/logging/i_logger_service.dart';
import '../../../../core/network/error_handler.dart';
import '../../../../features/v2/site/presentation/cubit/site_cubit.dart';
import '../../domain/entities/device_task_entity.dart'; // 🔥 新增
import '../../domain/usecases/cancel_task_usecase.dart';
import '../../domain/usecases/get_device_task_pool_usecase.dart';
import '../../domain/usecases/pause_task_usecase.dart';
import '../../domain/usecases/recovery_task_usecase.dart';
import 'device_task_state.dart';

class DeviceTaskCubit extends Cubit<DeviceTaskState> {
  final GetDeviceTaskPoolUseCase _getDeviceTaskPoolUseCase;
  final CancelTaskUseCase _cancelTaskUseCase;
  final PauseTaskUseCase _pauseTaskUseCase;
  final RecoveryTaskUseCase _recoveryTaskUseCase;
  final ILoggerService _logger = GetIt.I<ILoggerService>();

  DeviceTaskCubit(
    this._getDeviceTaskPoolUseCase,
    this._cancelTaskUseCase,
    this._pauseTaskUseCase,
    this._recoveryTaskUseCase,
  ) : super(const DeviceTaskState());

  /// 获取任务池并过滤出当前设备的任务
  Future<void> fetchAndFilterTask(String deviceId) async {
    emit(state.copyWith(isLoading: true, errorMessage: null));

    try {
      // 获取用户信息
      final userCubit = GetIt.I<AppUserCubit>();
      final user = userCubit.state.user;
      if (user == null) {
        emit(state.copyWith(isLoading: false, errorMessage: '用户未登录'));
        return;
      }

      // 获取场站信息（siteId 和 orgId 都从当前场站取）
      final siteCubit = GetIt.I<SiteCubit>();
      final selectedSite = siteCubit.state.selectedSite;
      final siteId = selectedSite?.id;
      final orgId = selectedSite?.orgId ?? 0;
      if (siteId == null) {
        emit(state.copyWith(isLoading: false, errorMessage: '未选择场站'));
        return;
      }

      // 调用接口获取任务池
      final result = await _getDeviceTaskPoolUseCase.call(
        GetDeviceTaskPoolParams(
          userId: user.userId ?? '',
          siteId: siteId,
          orgId: orgId,
        ),
      );

      result.fold(
        (failure) {
          _logger.logWithLevel('❌ 获取任务池失败: ${failure.message}');
          emit(
            state.copyWith(
              isLoading: false,
              errorMessage: ErrorHandler.getErrorMessage(failure.message),
              shouldShowError: true, // 🔥 标记需要显示错误弹窗
            ),
          );
        },
        (taskList) {
          // 🔥 过滤出当前设备 + 活跃状态的任务（NEW, EXECUTING, PAUSE, CANCELING, FAILED）
          final activeTasks = taskList.where((task) {
            // 1. 设备号匹配
            if (task.deviceId != deviceId) return false;

            // 2. 状态过滤：保留新建、执行中、暂停中、取消中、执行失败的任务
            final status = task.taskStatus;
            return status == 'NEW' || // 新建
                status == 'EXECUTING' || // 执行中
                status == 'PAUSE' || // 暂停中
                status == 'CANCELING' || // 取消中（用户可处理）
                status == 'FAILED'; // 执行失败（用户可恢复或取消）
          }).toList();

          _logger.logWithLevel(
            '✅ [fetchAndFilterTask] deviceId=$deviceId, 任务池总数=${taskList.length}, 过滤后活跃任务数=${activeTasks.length}',
          );
          for (final t in taskList) {
            _logger.logWithLevel(
              '   - taskId=${t.id}, deviceId=${t.deviceId}, status=${t.taskStatus}',
            );
          }

          // 🔥 如果有多个任务，保存所有选项供用户选择
          // 如果只有1个，直接选中
          final currentTask = activeTasks.isNotEmpty ? activeTasks.first : null;

          emit(
            state.copyWith(
              isLoading: false,
              taskPool: taskList,
              currentTask: currentTask,
              currentTaskId: currentTask?.id,
              activeTasks: activeTasks,
            ),
          );
        },
      );
    } catch (e) {
      _logger.logWithLevel('❌ 获取任务池异常: $e');
      emit(
        state.copyWith(
          isLoading: false,
          errorMessage: ErrorHandler.getErrorMessage(e),
          shouldShowError: true, // 🔥 标记需要显示错误弹窗
        ),
      );
    }
  }

  /// 取消任务
  Future<void> cancelTask(String deviceId, {bool forceCancel = true}) async {
    final taskId = state.currentTaskId;
    if (taskId == null) {
      emit(state.copyWith(errorMessage: '无可用任务'));
      return;
    }

    emit(
      state.copyWith(
        isLoading: true,
        operationType: DeviceTaskOperationType.cancel,
      ),
    );

    try {
      final userCubit = GetIt.I<AppUserCubit>();
      final user = userCubit.state.user;
      final siteCubit = GetIt.I<SiteCubit>();
      final selectedSite = siteCubit.state.selectedSite;
      final siteId = selectedSite?.id;
      final orgId = selectedSite?.orgId ?? 0;

      if (user == null || siteId == null) {
        emit(
          state.copyWith(
            isLoading: false,
            errorMessage: '参数不完整',
            operationType: DeviceTaskOperationType.none,
          ),
        );
        return;
      }

      final params = CancelTaskParams(
        deviceId: deviceId,
        taskId: taskId,
        orgId: orgId,
        siteId: siteId,
        forceCancel: forceCancel,
      );
      _logger.logWithLevel('[取消任务] 请求: POST /iot/deviceTask/cancelTask');
      _logger.logWithLevel(
        '[取消任务] 参数: deviceId=$deviceId, taskId=$taskId, orgId=$orgId, siteId=$siteId, forceCancel=$forceCancel',
      );
      final result = await _cancelTaskUseCase.call(params);

      result.fold(
        (failure) {
          _logger.logWithLevel('[取消任务] 响应失败: ${failure.message}');
          _logger.logWithLevel('❌ 取消任务失败: ${failure.message}');
          emit(
            state.copyWith(
              isLoading: false,
              errorMessage: ErrorHandler.getErrorMessage(failure.message),
              operationType: DeviceTaskOperationType.none,
              shouldShowError: true, // 🔥 标记需要显示错误弹窗
            ),
          );
        },
        (success) {
          _logger.logWithLevel('[取消任务] 响应成功: $success');
          _logger.logWithLevel('✅ 取消任务成功');
          emit(
            state.copyWith(
              isLoading: false,
              operationType: DeviceTaskOperationType.none,
            ),
          );
        },
      );
    } catch (e) {
      _logger.logWithLevel('❌ 取消任务异常: $e');
      emit(
        state.copyWith(
          isLoading: false,
          errorMessage: ErrorHandler.getErrorMessage(e),
          operationType: DeviceTaskOperationType.none,
          shouldShowError: true, // 🔥 标记需要显示错误弹窗
        ),
      );
    }
  }

  /// 暂停任务
  Future<void> pauseTask(String deviceId) async {
    final taskId = state.currentTaskId;
    if (taskId == null) {
      emit(state.copyWith(errorMessage: '无可用任务'));
      return;
    }

    emit(
      state.copyWith(
        isLoading: true,
        operationType: DeviceTaskOperationType.pause,
      ),
    );

    try {
      final userCubit = GetIt.I<AppUserCubit>();
      final user = userCubit.state.user;
      final siteCubit = GetIt.I<SiteCubit>();
      final selectedSite = siteCubit.state.selectedSite;
      final siteId = selectedSite?.id;
      final orgId = selectedSite?.orgId ?? 0;

      if (user == null || siteId == null) {
        emit(
          state.copyWith(
            isLoading: false,
            errorMessage: '参数不完整',
            operationType: DeviceTaskOperationType.none,
          ),
        );
        return;
      }

      final params2 = PauseTaskParams(
        deviceId: deviceId,
        taskId: taskId,
        orgId: orgId,
        siteId: siteId,
      );
      _logger.logWithLevel('[暂停任务] 请求: POST /iot/deviceTask/pauseTask');
      _logger.logWithLevel(
        '[暂停任务] 参数: deviceId=$deviceId, taskId=$taskId, orgId=$orgId, siteId=$siteId',
      );
      final result = await _pauseTaskUseCase.call(params2);

      result.fold(
        (failure) {
          _logger.logWithLevel('[暂停任务] 响应失败: ${failure.message}');
          _logger.logWithLevel('❌ 暂停任务失败: ${failure.message}');
          emit(
            state.copyWith(
              isLoading: false,
              errorMessage: ErrorHandler.getErrorMessage(failure.message),
              operationType: DeviceTaskOperationType.none,
              shouldShowError: true, // 🔥 标记需要显示错误弹窗
            ),
          );
        },
        (success) {
          _logger.logWithLevel('[暂停任务] 响应成功: $success');
          _logger.logWithLevel('✅ 暂停任务成功');
          emit(
            state.copyWith(
              isLoading: false,
              operationType: DeviceTaskOperationType.none,
            ),
          );
        },
      );
    } catch (e) {
      _logger.logWithLevel('❌ 暂停任务异常: $e');
      emit(
        state.copyWith(
          isLoading: false,
          errorMessage: ErrorHandler.getErrorMessage(e),
          operationType: DeviceTaskOperationType.none,
          shouldShowError: true, // 🔥 标记需要显示错误弹窗
        ),
      );
    }
  }

  /// 恢复任务
  Future<void> recoveryTask(String deviceId) async {
    final taskId = state.currentTaskId;
    if (taskId == null) {
      emit(state.copyWith(errorMessage: '无可用任务'));
      return;
    }

    emit(
      state.copyWith(
        isLoading: true,
        operationType: DeviceTaskOperationType.recovery,
      ),
    );

    try {
      final userCubit = GetIt.I<AppUserCubit>();
      final user = userCubit.state.user;
      final siteCubit = GetIt.I<SiteCubit>();
      final selectedSite = siteCubit.state.selectedSite;
      final siteId = selectedSite?.id;
      final orgId = selectedSite?.orgId ?? 0;

      if (user == null || siteId == null) {
        emit(
          state.copyWith(
            isLoading: false,
            errorMessage: '参数不完整',
            operationType: DeviceTaskOperationType.none,
          ),
        );
        return;
      }

      final params3 = RecoveryTaskParams(
        deviceId: deviceId,
        taskId: taskId,
        orgId: orgId,
        siteId: siteId,
      );
      _logger.logWithLevel('[恢复任务] 请求: POST /iot/deviceTask/recoveryTask');
      _logger.logWithLevel(
        '[恢复任务] 参数: deviceId=$deviceId, taskId=$taskId, orgId=$orgId, siteId=$siteId',
      );
      final result = await _recoveryTaskUseCase.call(params3);

      result.fold(
        (failure) {
          _logger.logWithLevel('[恢复任务] 响应失败: ${failure.message}');
          _logger.logWithLevel('❌ 恢复任务失败: ${failure.message}');
          emit(
            state.copyWith(
              isLoading: false,
              errorMessage: ErrorHandler.getErrorMessage(failure.message),
              operationType: DeviceTaskOperationType.none,
              shouldShowError: true, // 🔥 标记需要显示错误弹窗
            ),
          );
        },
        (data) {
          _logger.logWithLevel('[恢复任务] 响应成功: $data');
          _logger.logWithLevel('✅ 恢复任务成功: $data');
          emit(
            state.copyWith(
              isLoading: false,
              operationType: DeviceTaskOperationType.none,
            ),
          );
        },
      );
    } catch (e) {
      _logger.logWithLevel('❌ 恢复任务异常: $e');
      emit(
        state.copyWith(
          isLoading: false,
          errorMessage: ErrorHandler.getErrorMessage(e),
          operationType: DeviceTaskOperationType.none,
          shouldShowError: true, // 🔥 标记需要显示错误弹窗
        ),
      );
    }
  }

  /// 更新当前任务ID（当选择新航线时调用）
  void updateCurrentTaskId(int taskId) {
    // 🔥 只有 activeTasks 非空时才设置 currentTask，避免信息栏一直显示
    DeviceTaskEntity? taskEntity;
    if (state.activeTasks.isNotEmpty) {
      taskEntity = state.activeTasks.firstWhere(
        (t) => t.id == taskId,
        orElse: () => DeviceTaskEntity(
          id: taskId,
          deviceId: '',
          taskStatus: 'EXECUTING',
          taskStatusTranslate: '执行中',
        ),
      );
    }
    emit(state.copyWith(currentTaskId: taskId, currentTask: taskEntity));
    _logger.logWithLevel(
      '🔄 更新当前任务ID: $taskId, activeTasks: ${state.activeTasks.length}, currentTask: ${taskEntity?.taskStatus ?? "null"}',
    );
  }

  /// 🔥 手动选择任务（用户从弹窗中选择）
  void selectTask(DeviceTaskEntity task) {
    _logger.logWithLevel('✅ 用户选择任务ID: ${task.id}, 状态: ${task.taskStatus}');
    emit(state.copyWith(currentTask: task, currentTaskId: task.id));
  }

  /// 清除当前任务
  void clearCurrentTask() {
    emit(state.copyWith(currentTask: null, currentTaskId: null));
    _logger.logWithLevel('🧹 清除当前任务');
  }

  /// 🔥 退出登录时清空所有状态
  void clearAll() {
    if (!isClosed) {
      emit(const DeviceTaskState());
    }
    _logger.logWithLevel('🧹 [DeviceTaskCubit] clearAll - 所有状态已重置');
  }
}