/**
 * 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 i18n from '@/i18n';
import { logger } from '@/utils/logger';
import dayjs from 'dayjs';
import * as Notifications from 'expo-notifications';
import { SleepAnalysisData } from './sleepMonitor';

const t = (key: string, options?: Record<string, unknown>) => i18n.t(`sleepNotification.${key}`, options);

/**
 * 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 body = t('body', { 
    duration: sleepDuration, 
    efficiency: sleepEfficiency.toFixed(0), 
    score: sleepScore 
  });

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

  // 计算睡眠日期
  // 睡眠详情页面使用的日期逻辑是：传入的日期会查询从前一天18:00到当天12:00的数据
  // 所以我们应该传递醒来的日期（sessionEnd），这样用户点击通知后能看到正确的睡眠数据
  const sleepDate = analysis.sessionEnd 
    ? dayjs(analysis.sessionEnd).format('YYYY-MM-DD')
    : dayjs().format('YYYY-MM-DD');

  return {
    title,
    body: `${body}\n${suggestion}`,
    data: {
      type: 'sleep_analysis',
      score: sleepScore,
      quality,
      date: sleepDate, // 添加日期参数，用于点击通知后跳转
      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: Record<string, { emoji: string; title: string }> = {
    excellent: {
      emoji: '🥳',
      title: t('quality.excellent'),
    },
    good: {
      emoji: '☀️',
      title: t('quality.good'),
    },
    fair: {
      emoji: '🌤️',
      title: t('quality.fair'),
    },
    poor: {
      emoji: '🌛',
      title: t('quality.poor'),
    },
    very_poor: {
      emoji: '🫂',
      title: t('quality.veryPoor'),
    },
  };

  return configs[quality] || {
    emoji: '🛏️',
    title: t('quality.default'),
  };
}

/**
 * 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 t('duration.hoursOnly', { hours: h });
  }
  return t('duration.hoursAndMinutes', { hours: h, minutes: m });
}

/**
 * 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 - 给予鼓励
  if (quality === 'excellent' || quality === 'good') {
    const tips = [
      t('tips.excellent.keepItUp'),
      t('tips.excellent.greatJob'),
      t('tips.excellent.energized'),
      t('tips.excellent.proud'),
    ];
    return `✨ ${tips[Math.floor(Math.random() * tips.length)]}`;
  }

  // 根据具体问题给出温暖的建议
  const suggestions: string[] = [];

  if (totalSleepHours < 7) {
    suggestions.push(t('tips.suggestions.shortSleep'));
  } else if (totalSleepHours > 9) {
    suggestions.push(t('tips.suggestions.longSleep'));
  }

  if (deepSleepPercentage < 13) {
    suggestions.push(t('tips.suggestions.lowDeepSleep'));
  }

  if (remSleepPercentage < 20) {
    suggestions.push(t('tips.suggestions.lowRemSleep'));
  }

  if (sleepEfficiency < 85) {
    suggestions.push(t('tips.suggestions.lowEfficiency'));
  }

  // 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 `💡 ${t('tips.general')}`;
}