// modules/problem/controllers/problem_controller.dart
import 'dart:developer';

import 'package:dio/dio.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart' hide MultipartFile, FormData;
import 'package:flutter/material.dart';
import 'package:problem_check_system/data/repositories/problem_repository.dart';
import 'package:problem_check_system/modules/problem/views/widgets/custom_data_range_dropdown.dart';
import 'package:problem_check_system/data/models/problem_model.dart';

class ProblemController extends GetxController
    with GetSingleTickerProviderStateMixin {
  /// 依赖问题数据
  final ProblemRepository problemRepository;

  /// 最近问题列表
  final RxList<Problem> problems = <Problem>[].obs;

  /// 历史问题列表
  final RxList<Problem> historyProblems = <Problem>[].obs;

  /// 未上传的问题列表
  final RxList<Problem> unUploadedProblems = <Problem>[].obs;
  final Rx<bool> allSelected = false.obs;
  final RxDouble uploadProgress = 0.0.obs;
  // Dio 的取消令牌，用于取消正在进行的请求
  late CancelToken _cancelToken;

  int get selectedCount {
    return unUploadedProblems.where((problem) => problem.isChecked).length;
  }

  List<Problem> get selectedProblems {
    return unUploadedProblems.where((problem) => problem.isChecked).toList();
  }

  /// 筛选条件
  final Rx<DateRange> selectedDateRange = DateRange.oneWeek.obs;
  final RxString selectedUploadStatus = '全部'.obs;
  final RxString selectedBindingStatus = '全部'.obs;

  /// 是否加载中
  final RxBool isLoading = false.obs;

  late TabController tabController;

  /// floatingButton 拖动
  final double _fabSize = 56.0;
  final double _edgePaddingX = 27.0.w;
  final double _edgePaddingY = 111.0.h;
  final fabUploadPosition = Offset(337.0, 703.7).obs;

  /// get 选中的
  RxBool get isOnline => problemRepository.isOnline;

  ProblemController({required this.problemRepository});

  @override
  void onInit() {
    super.onInit();
    tabController = TabController(length: 2, vsync: this);
    tabController.addListener(_onTabChanged);
    loadProblems();
    // 查询未上传问题
    loadUnUploadedProblems();
  }

  @override
  void onClose() {
    tabController.dispose();
    super.onClose();
  }

  // #region 问题上传
  /// 当单个问题的选中状态改变时调用
  void onProblemCheckedChange() {}

  /// 选择全部问题
  void selectAll() {
    final bool newState = !allSelected.value;
    for (var problem in unUploadedProblems) {
      problem.isChecked = newState;
    }
    allSelected.value = newState;
    // _updateSelectedList();
  }

  // 启动上传流程
  Future<void> handleUpload() async {
    if (selectedProblems.isEmpty) {
      Get.snackbar('提示', '请选择要上传的问题');
      return;
    }

    uploadProgress.value = 0.0;
    _cancelToken = CancelToken();

    // 显示上传对话框
    showUploadProgressDialog();

    try {
      // 直接将问题列表传递给 Repository
      await problemRepository.uploadProblems(
        selectedProblems,
        cancelToken: _cancelToken,
        onProgress: (progress) {
          uploadProgress.value = progress;
        },
      );

      Get.back();
      Get.snackbar('成功', '所有问题已成功上传！', snackPosition: SnackPosition.BOTTOM);
    } on DioException catch (e) {
      Get.back();
      if (CancelToken.isCancel(e)) {
        Get.snackbar('提示', '上传已取消', snackPosition: SnackPosition.BOTTOM);
      } else {
        Get.snackbar(
          '上传失败',
          '错误: ${e.message}',
          snackPosition: SnackPosition.BOTTOM,
        );
      }
    } catch (e) {
      Get.back();
      Get.snackbar('上传失败', '发生未知错误', snackPosition: SnackPosition.BOTTOM);
    }
  }

  /// 显示上传对话框
  void showUploadProgressDialog() {
    // 显示对话框
    Get.defaultDialog(
      title: '上传问题中...',
      content: Obx(() {
        // final progress = (uploadProgress.value * 100).toInt();
        return Column(
          // mainAxisSize: MainAxisSize.min,
          children: [
            SizedBox(height: 16.h),
            LinearProgressIndicator(
              value: uploadProgress.value,
              backgroundColor: Colors.grey[300],
              valueColor: const AlwaysStoppedAnimation<Color>(Colors.blue),
            ),
            SizedBox(height: 16.h),
            // Text('已完成: $progress%'),
            Text('已上传: ${unUploadedProblems.length} / $selectedCount'),
          ],
        );
      }),
      barrierDismissible: false, // 防止用户点击外部关闭对话框
      // 添加一个 "取消" 按钮
      cancel: ElevatedButton(
        onPressed: () {
          // 调用 controller 中的取消方法
          cancelUpload();
        },
        child: Text('取消', style: TextStyle(color: Colors.red)),
      ),
    );
    // 启动上传逻辑
    // ...
  }

  void cancelUpload() {
    // 在这里实现你的取消逻辑
    // 1. 停止上传任务（例如，取消 HTTP 请求）
    // 2. 将上传进度重置为0
    uploadProgress.value = 0.0;
    // 3. 关闭对话框
    Get.back();
    // 4. 可以添加一个提示，例如：
    // Get.snackbar('提示', '上传已取消');
  }

  void uploadProblems() async {
    // if (selectedUnUploadedProblems.isEmpty) return;
    // // 实际的上传逻辑，例如调用 API
    // // 上传完成后，清空列表或更新状态
    // selectedUnUploadedProblems.clear();
    // for (var problem in selectedUnUploadedProblems) {
    //   await uploadProblem(problem);
    // }
  }

  // #endregion

  // #region 悬浮按钮
  /// floatingButton更新位置
  void updateFabUploadPosition(Offset delta) {
    final screenWidth = ScreenUtil().screenWidth;
    final screenHeight = ScreenUtil().screenHeight;

    Offset newPosition = fabUploadPosition.value + delta;

    // 限制水平范围：按钮左边缘与屏幕左边缘的距离
    double clampedDx = newPosition.dx.clamp(
      _edgePaddingX,
      screenWidth - _fabSize - _edgePaddingX,
    );

    // 限制垂直范围：按钮上边缘与屏幕上边缘的距离
    double clampedDy = newPosition.dy.clamp(
      _edgePaddingY,
      screenHeight - _fabSize - _edgePaddingY,
    );

    fabUploadPosition.value = Offset(clampedDx, clampedDy);
  }

  /// floatingButton 贴靠
  void snapToEdge() {
    final screenWidth = ScreenUtil().screenWidth;

    // 获取当前按钮的水平中心点
    final buttonCenterDx = fabUploadPosition.value.dx + _fabSize / 2;

    double newDx;

    // 判断按钮中心点位于屏幕的左半部分还是右半部分
    if (buttonCenterDx < screenWidth / 2) {
      // 贴靠到左侧，按钮左边缘与屏幕左边缘距离为 _edgePaddingX
      newDx = _edgePaddingX;
    } else {
      // 贴靠到右侧，按钮右边缘与屏幕右边缘距离为 _edgePaddingX
      newDx = screenWidth - _fabSize - _edgePaddingX;
    }

    // 关键：只更新水平位置，垂直位置保持不变
    fabUploadPosition.value = Offset(newDx, fabUploadPosition.value.dy);
  }

  // #endregion

  // #region ta按钮
  void _onTabChanged() {
    if (!tabController.indexIsChanging) {
      selectedDateRange.value = DateRange.oneWeek;
      selectedUploadStatus.value = '全部';
      selectedBindingStatus.value = '全部';
      loadProblems();
    }
  }
  // #endregion

  ///  加载
  Future<void> loadProblems() async {
    isLoading.value = true;
    try {
      // 根据 Tab 索引设置查询参数的默认值
      final bool isProblemListTab = tabController.index == 0;

      final DateTime startDate = isProblemListTab
          ? selectedDateRange.value.startDate
          : DateTime(2000); // 历史列表从很早的日期开始

      final DateTime endDate = DateTime.now();

      final String uploadStatus = isProblemListTab
          ? selectedUploadStatus.value
          : '全部';

      final String bindStatus = isProblemListTab
          ? selectedBindingStatus.value
          : '全部';

      // 只执行一次数据库查询
      final loadedProblems = await problemRepository.getProblems(
        startDate: startDate,
        endDate: endDate,
        uploadStatus: uploadStatus,
        bindStatus: bindStatus,
      );

      // 根据 Tab 索引将数据分配给正确的列表
      if (isProblemListTab) {
        problems.assignAll(loadedProblems);
      } else {
        historyProblems.assignAll(loadedProblems);
      }
    } catch (e) {
      Get.snackbar('错误', '加载问题失败: $e');
    } finally {
      isLoading.value = false;
    }
  }

  /// 筛选问题
  void updateFiltersAndLoadProblems({
    DateRange? newDateRange,
    String? newUploadStatus,
    String? newBindingStatus,
  }) {
    if (newDateRange != null) {
      selectedDateRange.value = newDateRange;
    }
    if (newUploadStatus != null) {
      selectedUploadStatus.value = newUploadStatus;
    }
    if (newBindingStatus != null) {
      selectedBindingStatus.value = newBindingStatus;
    }

    // 只要调用此方法，就重新加载数据
    loadProblems();
  }

  // 新增方法：查询所有未上传的问题
  Future<void> loadUnUploadedProblems() async {
    isLoading.value = true;
    try {
      // 调用 _localDatabase.getProblems 并只筛选 '未上传' 的问题
      unUploadedProblems.value = await problemRepository.getProblems(
        uploadStatus: '未上传',
      );
    } catch (e) {
      Get.snackbar('错误', '加载未上传问题失败: $e');
    } finally {
      isLoading.value = false;
    }
  }

  Future<void> addProblem(Problem problem) async {
    try {
      await problemRepository.insertProblem(problem);
      loadProblems();
    } catch (e) {
      Get.snackbar('错误', '保存问题失败: $e');
      rethrow;
    }
  }

  Future<void> updateProblem(Problem problem) async {
    try {
      await problemRepository.updateProblem(problem);
      loadProblems();
    } catch (e) {
      Get.snackbar('错误', '更新问题失败: $e');
      rethrow;
    }
  }

  Future<void> deleteProblem(Problem problem) async {
    try {
      if (problem.id != null) {
        await problemRepository.deleteProblem(problem.id!);
        await _deleteProblemImages(problem);
        loadProblems();
      }
    } catch (e) {
      Get.snackbar('错误', '删除问题失败: $e');
      rethrow;
    }
  }

  Future<void> _deleteProblemImages(Problem problem) async {
    // for (var imagePath in problem.imageUrls) {
    //   try {
    //     final file = File(imagePath);
    //     if (await file.exists()) {
    //       await file.delete();
    //     }
    //   } catch (e) {
    //     throw Exception(e);
    //   }
    // }
  }

  /// 显示日期选择器
  ///
  Future<void> selectDateRange(BuildContext context) async {
    final initialDateRange = DateTimeRange(
      start: DateTime.now().subtract(const Duration(days: 7)),
      end: DateTime.now(),
    );

    final DateTimeRange? picked = await showDateRangePicker(
      context: context,
      firstDate: DateTime(2025, 8, 1), // 可选的最早日期
      lastDate: DateTime(2101), // 可选的最晚日期
      initialDateRange: initialDateRange,
    );

    if (picked != null) {
      // 处理用户选择的日期范围
      log('选择的日期范围是: ${picked.start} 到 ${picked.end}');
    }
  }
}