import dayjs from 'dayjs';
import type { HealthActivitySummary, HealthKitPermissions } from 'react-native-health';
import AppleHealthKit from 'react-native-health';

const PERMISSIONS: HealthKitPermissions = {
  permissions: {
    read: [
      AppleHealthKit.Constants.Permissions.StepCount,
      AppleHealthKit.Constants.Permissions.ActiveEnergyBurned,
      AppleHealthKit.Constants.Permissions.SleepAnalysis,
      AppleHealthKit.Constants.Permissions.HeartRateVariability,
      AppleHealthKit.Constants.Permissions.ActivitySummary,
    ],
    write: [
      // 支持体重写入
      AppleHealthKit.Constants.Permissions.Weight,
    ],
  },
};

export type TodayHealthData = {
  steps: number;
  activeEnergyBurned: number; // kilocalories
  sleepDuration: number; // 睡眠时长（分钟）
  hrv: number | null; // 心率变异性 (ms)
  // 健身圆环数据
  activeCalories: number;
  activeCaloriesGoal: number;
  exerciseMinutes: number;
  exerciseMinutesGoal: number;
  standHours: number;
  standHoursGoal: number;
};

export async function ensureHealthPermissions(): Promise<boolean> {
  return new Promise((resolve) => {
    console.log('开始初始化HealthKit...');

    AppleHealthKit.initHealthKit(PERMISSIONS, (error) => {
      if (error) {
        console.error('HealthKit初始化失败:', error);
        // 常见错误处理
        if (typeof error === 'string') {
          if (error.includes('not available')) {
            console.warn('HealthKit不可用 - 可能在模拟器上运行或非iOS设备');
          }
        }
        resolve(false);
        return;
      }
      console.log('HealthKit初始化成功');
      resolve(true);
    });
  });
}

export async function fetchHealthDataForDate(date: Date): Promise<TodayHealthData> {
  console.log('开始获取指定日期健康数据...', date);

  const start = dayjs(date).startOf('day').toDate();
  const end = dayjs(date).endOf('day').toDate();

  const options = {
    startDate: start.toISOString(),
    endDate: end.toISOString()
  } as any;

  const activitySummaryOptions = {
    startDate: start.toISOString(),
    endDate: end.toISOString()
  };

  console.log('查询选项:', options);

  // 并行获取所有健康数据，包括ActivitySummary
  const [steps, calories, sleepDuration, hrv, activitySummary] = await Promise.all([
    // 获取步数
    new Promise<number>((resolve) => {
      AppleHealthKit.getStepCount({
        date: dayjs(date).toISOString()
      }, (err, res) => {
        if (err) {
          console.error('获取步数失败:', err);
          return resolve(0);
        }
        if (!res) {
          console.warn('步数数据为空');
          return resolve(0);
        }
        console.log('步数数据:', res);
        resolve(res.value || 0);
      });
    }),

    // 获取消耗卡路里
    new Promise<number>((resolve) => {
      AppleHealthKit.getActiveEnergyBurned(options, (err, res) => {
        if (err) {
          console.error('获取消耗卡路里失败:', err);
          return resolve(0);
        }
        if (!res || !Array.isArray(res) || res.length === 0) {
          console.warn('卡路里数据为空或格式错误');
          return resolve(0);
        }
        console.log('卡路里数据:', res);
        // 求和该日内的所有记录（单位：千卡）
        const total = res.reduce((acc: number, item: any) => acc + (item?.value || 0), 0);
        resolve(total);
      });
    }),

    // 获取睡眠时长
    new Promise<number>((resolve) => {
      AppleHealthKit.getSleepSamples(options, (err, res) => {
        if (err) {
          console.error('获取睡眠数据失败:', err);
          return resolve(0);
        }
        if (!res || !Array.isArray(res) || res.length === 0) {
          console.warn('睡眠数据为空或格式错误');
          return resolve(0);
        }
        console.log('睡眠数据:', res);

        // 计算总睡眠时间（单位：分钟）
        let totalSleepDuration = 0;
        res.forEach((sample: any) => {
          if (sample && sample.startDate && sample.endDate) {
            const startTime = new Date(sample.startDate).getTime();
            const endTime = new Date(sample.endDate).getTime();
            const durationMinutes = (endTime - startTime) / (1000 * 60);
            totalSleepDuration += durationMinutes;
          }
        });

        resolve(totalSleepDuration);
      });
    }),

    // 获取HRV数据
    new Promise<number | null>((resolve) => {
      AppleHealthKit.getHeartRateVariabilitySamples(options, (err, res) => {
        if (err) {
          console.error('获取HRV数据失败:', err);
          return resolve(null);
        }
        if (!res || !Array.isArray(res) || res.length === 0) {
          console.warn('HRV数据为空或格式错误');
          return resolve(null);
        }
        console.log('HRV数据:', res);

        // 获取最新的HRV值
        const latestHrv = res[res.length - 1];
        if (latestHrv && latestHrv.value) {
          resolve(Math.round(latestHrv.value * 1000));
        } else {
          resolve(null);
        }
      });
    }),

    // 获取ActivitySummary数据（健身圆环数据）
    new Promise<HealthActivitySummary | null>((resolve) => {
      AppleHealthKit.getActivitySummary(
        activitySummaryOptions,
        (err: Object, results: HealthActivitySummary[]) => {
          if (err) {
            console.error('获取ActivitySummary失败:', err);
            return resolve(null);
          }
          if (!results || results.length === 0) {
            console.warn('ActivitySummary数据为空');
            return resolve(null);
          }
          console.log('ActivitySummary数据:', results[0]);
          resolve(results[0]);
        },
      );
    })
  ]);

  console.log('指定日期健康数据获取完成:', { steps, calories, sleepDuration, hrv, activitySummary });

  return {
    steps,
    activeEnergyBurned: calories,
    sleepDuration,
    hrv,
    // 健身圆环数据
    activeCalories: activitySummary?.activeEnergyBurned || 0,
    activeCaloriesGoal: activitySummary?.activeEnergyBurnedGoal || 350,
    exerciseMinutes: activitySummary?.appleExerciseTime || 0,
    exerciseMinutesGoal: activitySummary?.appleExerciseTimeGoal || 30,
    standHours: activitySummary?.appleStandHours || 0,
    standHoursGoal: activitySummary?.appleStandHoursGoal || 12
  };
}

export async function fetchTodayHealthData(): Promise<TodayHealthData> {
  return fetchHealthDataForDate(new Date());
}

// 新增：专门获取HRV数据的函数
export async function fetchHRVForDate(date: Date): Promise<number | null> {
  console.log('开始获取指定日期HRV数据...', date);

  const start = new Date(date);
  start.setHours(0, 0, 0, 0);
  const end = new Date(date);
  end.setHours(23, 59, 59, 999);

  const options = {
    startDate: start.toISOString(),
    endDate: end.toISOString()
  } as any;

  return new Promise<number | null>((resolve) => {
    AppleHealthKit.getHeartRateVariabilitySamples(options, (err, res) => {
      if (err) {
        console.error('获取HRV数据失败:', err);
        return resolve(null);
      }
      if (!res || !Array.isArray(res) || res.length === 0) {
        console.warn('HRV数据为空或格式错误');
        return resolve(null);
      }
      console.log('HRV数据:', res);

      // 获取最新的HRV值
      const latestHrv = res[res.length - 1];
      if (latestHrv && latestHrv.value) {
        resolve(latestHrv.value);
      } else {
        resolve(null);
      }
    });
  });
}

// 新增：获取今日HRV数据
export async function fetchTodayHRV(): Promise<number | null> {
  return fetchHRVForDate(new Date());
}

// 更新healthkit中的体重
export async function updateWeight(weight: number) {
  return new Promise((resolve) => {
    AppleHealthKit.saveWeight({
      value: weight,
    }, (err, res) => {
      if (err) {
        console.error('更新体重失败:', err);
        return resolve(false);
      }
      console.log('体重更新成功:', res);
      resolve(true);
    });
  });
}