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ID
      final siteCubit = GetIt.I<SiteCubit>();
      final siteId = siteCubit.state.selectedSite?.id;
      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: user.orgId ?? 0,
        ),
      );

      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）
          final activeTasks = taskList.where((task) {
            // 1. 设备号匹配
            if (task.deviceId != deviceId) return false;
            
            // 2. 状态过滤：只保留新建、执行中、暂停中的任务
            final status = task.taskStatus;
            return status == 'NEW' ||        // 新建
                   status == 'EXECUTING' ||  // 执行中
                   status == 'PAUSE';        // 暂停中
          }).toList();

          _logger.logWithLevel(
            '✅ 找到 ${activeTasks.length} 个活跃任务',
          );

          // 🔥 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) 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 siteId = siteCubit.state.selectedSite?.id;

      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: user.orgId ?? 0,
        siteId: siteId,
      );
      _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=${user.orgId ?? 0}, siteId=$siteId');
      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 siteId = siteCubit.state.selectedSite?.id;

      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: user.orgId ?? 0,
        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=${user.orgId ?? 0}, siteId=$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 siteId = siteCubit.state.selectedSite?.id;

      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: user.orgId ?? 0,
        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=${user.orgId ?? 0}, siteId=$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) {
    emit(state.copyWith(currentTaskId: taskId));
    _logger.logWithLevel('🔄 更新当前任务ID: $taskId');
  }

  /// 🔥 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');
  }
}