import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:maibu_satabot_v2/features/devices/domain/entities/device_entity.dart';
import 'package:maibu_satabot_v2/features/devices/domain/repositories/device_repository.dart';
import 'package:maibu_satabot_v2/features/devices/domain/usecases/get_user_device_usecase.dart';

import 'devices_state.dart';

class DevicesCubit extends Cubit<DevicesState> {
  final GetUserDeviceUseCase _getUserDeviceUseCase;

  final DeviceRepository repository;

  DevicesCubit(this.repository, this._getUserDeviceUseCase)
    : super(const DevicesState());

  // 获取所有设备列表
  Future<void> fetchAllDevices(String username) async {
    emit(state.copyWith(isLoading: true));
    try {
      // 模拟网络请求获取列表
      var resultEither = await _getUserDeviceUseCase.call(
        GetUserDeviceParams(username),
      );

      resultEither.fold(
        (failure) => emit(
          state.copyWith(
            isLoading: false,
            errorMessage: failure.message, // 假设你的 Failure 类有 message 字段
          ),
        ),
        (deviceList) {
          emit(
            state.copyWith(
              devices: deviceList,
              selectedDevice: deviceList.isNotEmpty ? deviceList.first : null,
              isLoading: false,
            ),
          );
        },
      );
    } catch (e) {
      emit(state.copyWith(isLoading: false, errorMessage: e.toString()));
    }
  }

  // 切换当前选中的设备
  void selectDevice(DeviceEntity device) {
    emit(state.copyWith(selectedDevice: device));
  }

  // 更新单个设备的状态（例如从 Tcp 收到实时电量更新）
  void updateDeviceStatus(DeviceEntity updatedDevice) {
    final newList = state.devices.map((d) {
      return d.deviceName == updatedDevice.deviceName ? updatedDevice : d;
    }).toList();

    // 如果更新的是当前选中的设备，也要同步更新 selectedDevice
    final newSelected =
        state.selectedDevice?.deviceName == updatedDevice.deviceName
        ? updatedDevice
        : state.selectedDevice;

    emit(state.copyWith(devices: newList, selectedDevice: newSelected));
  }

  Future<void> switchDevice(DeviceEntity device) async {
    // 保持现有列表，只改 loading
    emit(state.copyWith(isLoading: true));

    final result = await repository.switchDevice("app", device.deviceName);

    result.fold((l) {
      emit(state.copyWith(isLoading: false, errorMessage: l.message));
      selectDevice(device);
    }, (r) => emit(state.copyWith(isLoading: false, selectedDevice: device)));
  }
}