import dayjs from 'dayjs';
import HealthKitManager, { HealthKitUtils } from './healthKit';

// 睡眠阶段枚举
export enum SleepStage {
  InBed = 'INBED',
  Asleep = 'ASLEEP',
  Awake = 'AWAKE',
  Core = 'CORE',
  Deep = 'DEEP',
  REM = 'REM'
}

// 睡眠质量评级
export enum SleepQuality {
  Poor = 'poor',
  Fair = 'fair',
  Good = 'good',
  Excellent = 'excellent'
}

// 睡眠样本数据类型
export type SleepSample = {
  startDate: string;
  endDate: string;
  value: SleepStage;
  sourceName?: string;
  sourceId?: string;
};

// 睡眠阶段统计
export type SleepStageStats = {
  stage: SleepStage;
  duration: number;
  percentage: number;
  quality: SleepQuality;
};

// 心率数据类型
export type HeartRateData = {
  timestamp: string;
  value: number;
};

// 完整睡眠详情数据
export type CompleteSleepData = {
  sleepScore: number;
  totalSleepTime: number;
  sleepQualityPercentage: number;
  bedtime: string;
  wakeupTime: string;
  timeInBed: number;
  sleepStages: SleepStageStats[];
  rawSleepSamples: SleepSample[];
  averageHeartRate: number | null;
  sleepHeartRateData: HeartRateData[];
  sleepEfficiency: number;
  qualityDescription: string;
  recommendation: string;
};

/**
 * 创建睡眠日期范围 (从前一天 18:00 到当天 12:00)
 */
const createSleepDateRange = (date: Date): { startDate: Date; endDate: Date } => {
  return {
    startDate: dayjs(date).subtract(1, 'day').hour(18).minute(0).second(0).millisecond(0).toDate(),
    endDate: dayjs(date).hour(12).minute(0).second(0).millisecond(0).toDate()
  };
};

/**
 * 映射 HealthKit 睡眠值到自定义枚举
 * react-native-health 库返回的睡眠分析值是字符串:
 * "INBED" = InBed (在床时间)
 * "ASLEEP" = Asleep (睡着但未分阶段)
 * "AWAKE" = Awake (醒来时间)
 * "CORE" = Core (核心睡眠/浅度睡眠)
 * "DEEP" = Deep (深度睡眠)
 * "REM" = REM (快速眼动睡眠)
 */
const mapHealthKitSleepValue = (value: string): SleepStage => {
  switch (value) {
    case 'INBED':
      return SleepStage.InBed;
    case 'ASLEEP':
      return SleepStage.Asleep;
    case 'AWAKE':
      return SleepStage.Awake;
    case 'CORE':
      return SleepStage.Core;
    case 'DEEP':
      return SleepStage.Deep;
    case 'REM':
      return SleepStage.REM;
    default:
      console.warn(`[Sleep] 未识别的睡眠阶段值: ${value}`);
      return SleepStage.Asleep;
  }
};

/**
 * 获取睡眠样本数据
 */
export const fetchSleepSamples = async (date: Date): Promise<SleepSample[]> => {
  try {
    const dateRange = createSleepDateRange(date);
    console.log('[Sleep] 查询睡眠数据范围:', {
      startDate: dayjs(dateRange.startDate).format('YYYY-MM-DD HH:mm:ss'),
      endDate: dayjs(dateRange.endDate).format('YYYY-MM-DD HH:mm:ss')
    });

    const options = {
      startDate: dateRange.startDate.toISOString(),
      endDate: dateRange.endDate.toISOString(),
    };

    // return new Promise((resolve) => {
    //   HealthKitManager.(options, (error: string, results: any[]) => {
    //     if (error) {
    //       console.error('[Sleep] 获取睡眠数据失败:', error);
    //       resolve([]); // 返回空数组而非拒绝，以便于处理
    //       return;
    //     }

    //     if (!results || results.length === 0) {
    //       console.warn('[Sleep] 未找到睡眠数据');
    //       resolve([]);
    //       return;
    //     }

    //     console.log('[Sleep] 获取到原始睡眠样本:', results.length, '条');

    //     // 过滤并转换数据格式
    //     const sleepSamples: SleepSample[] = results
    //       .filter(sample => {
    //         const sampleStart = new Date(sample.startDate).getTime();
    //         const sampleEnd = new Date(sample.endDate).getTime();
    //         const rangeStart = dateRange.startDate.getTime();
    //         const rangeEnd = dateRange.endDate.getTime();

    //         return (sampleStart >= rangeStart && sampleStart < rangeEnd) ||
    //           (sampleStart < rangeEnd && sampleEnd > rangeStart);
    //       })
    //       .map(sample => {
    //         console.log('[Sleep] 原始睡眠样本:', {
    //           startDate: sample.startDate,
    //           endDate: sample.endDate,
    //           value: sample.value,
    //           sourceName: sample.sourceName
    //         });

    //         return {
    //           startDate: sample.startDate,
    //           endDate: sample.endDate,
    //           value: mapHealthKitSleepValue(sample.value),
    //           sourceName: sample.sourceName,
    //           sourceId: sample.sourceId || sample.uuid
    //         };
    //       });

    //     console.log('[Sleep] 过滤后的睡眠样本:', sleepSamples.length, '条');
    //     resolve(sleepSamples);
    //   });
    // });

  } catch (error) {
    console.error('[Sleep] 获取睡眠样本失败:', error);
    return [];
  }
};

/**
 * 获取睡眠期间心率数据
 */
export const fetchSleepHeartRateData = async (bedtime: string, wakeupTime: string): Promise<HeartRateData[]> => {
  try {
    const options = {
      startDate: bedtime,
      endDate: wakeupTime,
    };

    // return new Promise((resolve) => {
    //   HealthKit.getHeartRateSamples(options, (error: string, results: any[]) => {
    //     if (error) {
    //       console.error('[Sleep] 获取心率数据失败:', error);
    //       resolve([]);
    //       return;
    //     }

    //     if (!results || results.length === 0) {
    //       console.log('[Sleep] 未找到心率数据');
    //       resolve([]);
    //       return;
    //     }

    //     const heartRateData: HeartRateData[] = results
    //       .filter(sample => {
    //         const sampleTime = new Date(sample.startDate).getTime();
    //         const bedtimeMs = new Date(bedtime).getTime();
    //         const wakeupTimeMs = new Date(wakeupTime).getTime();
    //         return sampleTime >= bedtimeMs && sampleTime <= wakeupTimeMs;
    //       })
    //       .map(sample => ({
    //         timestamp: sample.startDate,
    //         value: Math.round(sample.value)
    //       }))
    //       .sort((a, b) => new Date(a.timestamp).getTime() - new Date(b.timestamp).getTime());

    //     console.log('[Sleep] 获取到睡眠心率数据:', heartRateData.length, '个样本');
    //     resolve(heartRateData);
    //   });
    // });

  } catch (error) {
    console.error('[Sleep] 获取睡眠心率数据失败:', error);
    return [];
  }
};

/**
 * 计算睡眠阶段统计
 */
export const calculateSleepStageStats = (samples: SleepSample[]): SleepStageStats[] => {
  console.log('[Sleep] 开始计算睡眠阶段统计，原始样本数:', samples.length);

  const stageMap = new Map<SleepStage, number>();

  // 统计各阶段持续时间
  samples.forEach(sample => {
    const startTime = dayjs(sample.startDate);
    const endTime = dayjs(sample.endDate);
    const duration = endTime.diff(startTime, 'minute');

    console.log(`[Sleep] 阶段: ${sample.value}, 持续时间: ${duration}分钟`);

    const currentDuration = stageMap.get(sample.value) || 0;
    stageMap.set(sample.value, currentDuration + duration);
  });

  console.log('[Sleep] 阶段时间统计:', Array.from(stageMap.entries()));

  // 计算实际睡眠时间（排除在床时间，但包含醒来时间）
  const actualSleepTime = Array.from(stageMap.entries())
    .filter(([stage]) => stage !== SleepStage.InBed)
    .reduce((total, [, duration]) => total + duration, 0);

  console.log('[Sleep] 实际睡眠时间（包含醒来）:', actualSleepTime, '分钟');

  const stats: SleepStageStats[] = [];

  stageMap.forEach((duration, stage) => {
    // 不处理在床时间，但处理所有其他阶段包括醒来时间
    if (stage === SleepStage.InBed) return;

    const percentage = actualSleepTime > 0 ? (duration / actualSleepTime) * 100 : 0;
    let quality: SleepQuality;

    // 根据不同阶段的标准百分比评估质量
    switch (stage) {
      case SleepStage.Deep:
        quality = percentage >= 15 ? SleepQuality.Excellent :
          percentage >= 10 ? SleepQuality.Good :
            percentage >= 5 ? SleepQuality.Fair : SleepQuality.Poor;
        break;
      case SleepStage.REM:
        quality = percentage >= 20 ? SleepQuality.Excellent :
          percentage >= 15 ? SleepQuality.Good :
            percentage >= 10 ? SleepQuality.Fair : SleepQuality.Poor;
        break;
      case SleepStage.Core:
        quality = percentage >= 45 ? SleepQuality.Excellent :
          percentage >= 35 ? SleepQuality.Good :
            percentage >= 25 ? SleepQuality.Fair : SleepQuality.Poor;
        break;
      case SleepStage.Asleep:
        // 未分阶段的睡眠时间，按中等质量处理
        quality = SleepQuality.Fair;
        break;
      case SleepStage.Awake:
        // 醒来时间越少越好
        quality = percentage <= 5 ? SleepQuality.Excellent :
          percentage <= 10 ? SleepQuality.Good :
            percentage <= 15 ? SleepQuality.Fair : SleepQuality.Poor;
        break;
      default:
        quality = SleepQuality.Fair;
    }

    stats.push({
      stage,
      duration,
      percentage: Math.round(percentage),
      quality
    });

    console.log(`[Sleep] 阶段统计: ${stage}, 时长: ${duration}分钟, 百分比: ${Math.round(percentage)}%, 质量: ${quality}`);
  });

  const sortedStats = stats.sort((a, b) => b.duration - a.duration);
  console.log('[Sleep] 最终睡眠阶段统计:', sortedStats);

  return sortedStats;
};

/**
 * 计算睡眠得分
 */
export const calculateSleepScore = (
  sleepStages: SleepStageStats[],
  sleepEfficiency: number,
  totalSleepTime: number
): number => {
  let score = 0;

  // 睡眠时长得分 (30%)
  const idealSleepHours = 8 * 60;
  const sleepDurationScore = Math.min(30, (totalSleepTime / idealSleepHours) * 30);
  score += sleepDurationScore;

  // 睡眠效率得分 (25%)
  const efficiencyScore = (sleepEfficiency / 100) * 25;
  score += efficiencyScore;

  // 深睡眠得分 (25%)
  const deepSleepStage = sleepStages.find(stage => stage.stage === SleepStage.Deep);
  const deepSleepScore = deepSleepStage ? Math.min(25, (deepSleepStage.percentage / 20) * 25) : 0;
  score += deepSleepScore;

  // REM睡眠得分 (20%)
  const remSleepStage = sleepStages.find(stage => stage.stage === SleepStage.REM);
  const remSleepScore = remSleepStage ? Math.min(20, (remSleepStage.percentage / 25) * 20) : 0;
  score += remSleepScore;

  return Math.round(Math.min(100, score));
};

/**
 * 获取睡眠质量描述和建议
 */
export const getSleepQualityInfo = (sleepScore: number): { description: string; recommendation: string } => {
  if (sleepScore >= 85) {
    return {
      description: '你身心愉悦并且精力充沛',
      recommendation: '恭喜你获得优质的睡眠！如果你感到精力充沛，可以考虑中等强度的运动，以维持健康的生活方式，并进一步减轻压力，以获得最佳睡眠。'
    };
  } else if (sleepScore >= 70) {
    return {
      description: '睡眠质量良好，精神状态不错',
      recommendation: '你的睡眠质量还不错，但还有改善空间。建议保持规律的睡眠时间，睡前避免使用电子设备，营造安静舒适的睡眠环境。'
    };
  } else if (sleepScore >= 50) {
    return {
      description: '睡眠质量一般，可能影响日间表现',
      recommendation: '你的睡眠需要改善。建议制定固定的睡前例行程序，限制咖啡因摄入，确保卧室温度适宜，考虑进行轻度运动来改善睡眠质量。'
    };
  } else {
    return {
      description: '睡眠质量较差，建议重视睡眠健康',
      recommendation: '你的睡眠质量需要严重关注。建议咨询医生或睡眠专家，检查是否有睡眠障碍，同时改善睡眠环境和习惯，避免睡前刺激性活动。'
    };
  }
};

/**
 * 主函数：获取完整的睡眠详情数据
 */
export const fetchCompleteSleepData = async (date: Date): Promise<CompleteSleepData | null> => {
  try {
    console.log('[Sleep] 开始获取完整睡眠数据...', dayjs(date).format('YYYY-MM-DD'));
    // 检查HealthKit是否可用
    if (!HealthKitUtils.isAvailable()) {
      console.log('HealthKit不可用，可能运行在Android设备或模拟器上');
      return null;
    }

    const res = await HealthKitManager.requestAuthorization()
    const status = await HealthKitManager.getAuthorizationStatus()
    console.log('status~~~', status);
    // await ensureHealthPermissions()
    // 获取睡眠样本
    const sleepSamples = await fetchSleepSamples(date);

    if (sleepSamples.length === 0) {
      console.warn('[Sleep] 没有找到睡眠数据');
      return null;
    }

    // 计算入睡和起床时间
    const sortedSamples = sleepSamples.sort((a, b) =>
      new Date(a.startDate).getTime() - new Date(b.startDate).getTime()
    );

    const bedtime = sortedSamples[0].startDate;
    const wakeupTime = sortedSamples[sortedSamples.length - 1].endDate;

    console.log('[Sleep] 计算睡眠时间范围:');
    console.log('- 入睡时间:', dayjs(bedtime).format('YYYY-MM-DD HH:mm:ss'));
    console.log('- 起床时间:', dayjs(wakeupTime).format('YYYY-MM-DD HH:mm:ss'));

    // 计算在床时间
    let timeInBed: number;
    const inBedSamples = sleepSamples.filter(sample => sample.value === SleepStage.InBed);

    if (inBedSamples.length > 0) {
      const sortedInBedSamples = inBedSamples.sort((a, b) =>
        new Date(a.startDate).getTime() - new Date(b.startDate).getTime()
      );

      const inBedStart = sortedInBedSamples[0].startDate;
      const inBedEnd = sortedInBedSamples[sortedInBedSamples.length - 1].endDate;
      timeInBed = dayjs(inBedEnd).diff(dayjs(inBedStart), 'minute');

      console.log('[Sleep] 在床时间:', timeInBed, '分钟');
    } else {
      timeInBed = dayjs(wakeupTime).diff(dayjs(bedtime), 'minute');
      console.log('[Sleep] 使用睡眠时间作为在床时间:', timeInBed, '分钟');
    }

    // 计算睡眠阶段统计
    const sleepStages = calculateSleepStageStats(sleepSamples);

    // 计算总睡眠时间（排除在床时间和醒来时间）
    const actualSleepStages = sleepStages.filter(stage =>
      stage.stage !== SleepStage.InBed
    );
    const totalSleepTime = actualSleepStages.reduce((total, stage) => total + stage.duration, 0);

    // 重新计算睡眠效率
    const sleepEfficiency = timeInBed > 0 ? Math.round((totalSleepTime / timeInBed) * 100) : 0;

    console.log('[Sleep] 睡眠效率计算:');
    console.log('- 总睡眠时间（不含醒来）:', totalSleepTime, '分钟');
    console.log('- 在床时间:', timeInBed, '分钟');
    console.log('- 睡眠效率:', sleepEfficiency, '%');

    // 获取睡眠期间心率数据
    const sleepHeartRateData = await fetchSleepHeartRateData(bedtime, wakeupTime);
    const averageHeartRate = sleepHeartRateData.length > 0 ?
      Math.round(sleepHeartRateData.reduce((sum, data) => sum + data.value, 0) / sleepHeartRateData.length) :
      null;

    // 计算睡眠得分和质量信息
    const sleepScore = calculateSleepScore(sleepStages, sleepEfficiency, totalSleepTime);
    const qualityInfo = getSleepQualityInfo(sleepScore);

    console.log('[Sleep] 睡眠数据处理完成:');
    console.log('- 总睡眠时间:', totalSleepTime, '分钟');
    console.log('- 睡眠效率:', sleepEfficiency, '%');
    console.log('- 睡眠得分:', sleepScore);

    return {
      sleepScore,
      totalSleepTime,
      sleepQualityPercentage: sleepScore,
      bedtime,
      wakeupTime,
      timeInBed,
      sleepStages,
      rawSleepSamples: sleepSamples,
      averageHeartRate,
      sleepHeartRateData,
      sleepEfficiency,
      qualityDescription: qualityInfo.description,
      recommendation: qualityInfo.recommendation
    };

  } catch (error) {
    console.error('[Sleep] 获取完整睡眠数据失败:', error);
    return null;
  }
};

/**
 * 工具函数：格式化睡眠时间显示
 */
export const formatSleepTime = (minutes: number): string => {
  const hours = Math.floor(minutes / 60);
  const mins = minutes % 60;
  if (hours > 0 && mins > 0) {
    return `${hours}h ${mins}m`;
  } else if (hours > 0) {
    return `${hours}h`;
  } else {
    return `${mins}m`;
  }
};

/**
 * 工具函数：格式化时间显示
 */
export const formatTime = (dateString: string): string => {
  return dayjs(dateString).format('HH:mm');
};

/**
 * 工具函数：获取睡眠阶段颜色
 */
export const getSleepStageColor = (stage: SleepStage): string => {
  switch (stage) {
    case SleepStage.Deep:
      return '#3B82F6';
    case SleepStage.Core:
      return '#8B5CF6';
    case SleepStage.REM:
    case SleepStage.Asleep:
      return '#EC4899';
    case SleepStage.Awake:
      return '#F59E0B';
    case SleepStage.InBed:
      return '#6B7280';
    default:
      return '#9CA3AF';
  }
};