// 云函数：subscribe
// 用户订阅每日运势推送，存储生辰信息和订阅偏好
const cloud = require('wx-server-sdk')
cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
const db = cloud.database()

exports.main = async (event, context) => {
  const { birthInfo, templateId, pushTime } = event
  const { OPENID } = cloud.getWXContext()

  // 参数校验
  if (!birthInfo || !templateId) {
    return { success: false, error: '参数不完整' }
  }

  if (!birthInfo.birthDate || birthInfo.birthHour == null || birthInfo.gender == null) {
    return { success: false, error: '生辰信息不完整' }
  }

  try {
    // 检查是否已存在订阅
    const existing = await db.collection('subscriptions').where({
      openid: OPENID,
    }).get()

    const subData = {
      openid: OPENID,
      templateId,
      birthInfo: {
        birthDate: birthInfo.birthDate,
        birthHour: birthInfo.birthHour,
        birthMinute: birthInfo.birthMinute || 0,
        birthPlace: birthInfo.birthPlace || '',
        longitude: birthInfo.longitude || 0,
        latitude: birthInfo.latitude || 0,
        gender: birthInfo.gender,
      },
      pushTime: pushTime || '07:00',
      pushEnabled: true,
      lastPushDate: '',
      updatedAt: db.serverDate(),
    }

    if (existing.data.length > 0) {
      // 更新现有订阅
      await db.collection('subscriptions').doc(existing.data[0]._id).update({
        data: subData,
      })
    } else {
      // 新建订阅
      subData.subscribedAt = db.serverDate()
      await db.collection('subscriptions').add({
        data: subData,
      })
    }

    return { success: true }
  } catch (err) {
    console.error('[subscribe] Error:', err)
    return { success: false, error: err.message }
  }
}