/**
 * 睡眠通知服务
 * 
 * 负责在睡眠分析完成后发送通知，提供睡眠质量评估和建议
 */

import { logger } from '@/utils/logger';
import * as Notifications from 'expo-notifications';
import { SleepAnalysisData } from './sleepMonitor';

/**
 * 分析睡眠数据并发送通知
 */
export async function analyzeSleepAndSendNotification(
  analysis: SleepAnalysisData
): Promise<void> {
  try {
    logger.info('开始分析睡眠并发送通知:', {
      score: analysis.sleepScore,
      quality: analysis.quality,
      duration: analysis.totalSleepHours,
    });

    // 构建通知内容
    const notification = buildSleepNotification(analysis);

    // 发送通知
    await Notifications.scheduleNotificationAsync({
      content: notification,
      trigger: null, // 立即发送
    });

    logger.info('睡眠分析通知已发送');
  } catch (error) {
    logger.error('发送睡眠分析通知失败:', error);
    throw error;
  }
}

/**
 * 构建睡眠通知内容
 */
function buildSleepNotification(analysis: SleepAnalysisData): Notifications.NotificationContentInput {
  const { sleepScore, quality, totalSleepHours, sleepEfficiency } = analysis;

  // 根据质量等级选择emoji和标题
  const qualityConfig = getQualityConfig(quality);
  
  // 构建通知标题
  const title = `${qualityConfig.emoji} ${qualityConfig.title}`;

  // 构建通知正文
  const sleepDuration = formatSleepDuration(totalSleepHours);
  const efficiencyText = `睡眠效率 ${sleepEfficiency.toFixed(0)}%`;
  const body = `您昨晚睡了 ${sleepDuration}，${efficiencyText}。评分：${sleepScore}分`;

  // 获取建议
  const suggestion = getSleepSuggestion(analysis);

  return {
    title,
    body: `${body}\n${suggestion}`,
    data: {
      type: 'sleep_analysis',
      score: sleepScore,
      quality,
      analysis: JSON.stringify(analysis),
      url: '/sleep-detail', // 点击通知跳转到睡眠详情页
    },
    sound: 'default',
    badge: 1,
  };
}

/**
 * 获取质量配置
 */
function getQualityConfig(quality: string): {
  emoji: string;
  title: string;
} {
  const configs = {
    excellent: {
      emoji: '😴',
      title: '睡眠质量优秀',
    },
    good: {
      emoji: '😊',
      title: '睡眠质量良好',
    },
    fair: {
      emoji: '😐',
      title: '睡眠质量一般',
    },
    poor: {
      emoji: '😟',
      title: '睡眠质量较差',
    },
    very_poor: {
      emoji: '😰',
      title: '睡眠质量很差',
    },
  };

  return configs[quality as keyof typeof configs] || {
    emoji: '💤',
    title: '睡眠分析完成',
  };
}

/**
 * 格式化睡眠时长
 */
function formatSleepDuration(hours: number): string {
  const h = Math.floor(hours);
  const m = Math.round((hours - h) * 60);
  
  if (m === 0) {
    return `${h}小时`;
  }
  return `${h}小时${m}分钟`;
}

/**
 * 获取睡眠建议
 */
function getSleepSuggestion(analysis: SleepAnalysisData): string {
  const { quality, totalSleepHours, deepSleepPercentage, remSleepPercentage, sleepEfficiency } = analysis;

  // 优秀或良好的睡眠
  if (quality === 'excellent' || quality === 'good') {
    const tips = [
      '继续保持良好的睡眠习惯！',
      '坚持规律作息，身体会感谢你！',
      '优质睡眠让你精力充沛！',
    ];
    return tips[Math.floor(Math.random() * tips.length)];
  }

  // 根据具体问题给出建议
  const suggestions: string[] = [];

  if (totalSleepHours < 7) {
    suggestions.push('建议增加睡眠时间至7-9小时');
  } else if (totalSleepHours > 9) {
    suggestions.push('睡眠时间偏长，注意睡眠质量');
  }

  if (deepSleepPercentage < 13) {
    suggestions.push('深度睡眠不足，睡前避免使用电子设备');
  }

  if (remSleepPercentage < 20) {
    suggestions.push('REM睡眠不足，保持规律的作息时间');
  }

  if (sleepEfficiency < 85) {
    suggestions.push('睡眠效率较低，改善睡眠环境');
  }

  // 如果有具体建议，返回第一条；否则返回通用建议
  if (suggestions.length > 0) {
    return `💡 ${suggestions[0]}`;
  }

  return '建议关注睡眠质量，保持良好作息';
}

/**
 * 发送简单的睡眠提醒（用于测试）
 */
export async function sendSimpleSleepReminder(userName: string = '朋友'): Promise<void> {
  try {
    await Notifications.scheduleNotificationAsync({
      content: {
        title: '😴 睡眠质量分析',
        body: `${userName}，您的睡眠数据已更新，点击查看详细分析`,
        data: {
          type: 'sleep_reminder',
          url: '/sleep-detail',
        },
        sound: 'default',
      },
      trigger: null,
    });

    logger.info('简单睡眠提醒已发送');
  } catch (error) {
    logger.error('发送简单睡眠提醒失败:', error);
  }
}