// 云函数：updatePushTime
// 更新用户推送时间
const cloud = require('wx-server-sdk')
cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
const db = cloud.database()

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

  // 校验 pushTime 格式 (HH:mm)
  if (!pushTime || !/^([01]\d|2[0-3]):([03]0)$/.test(pushTime)) {
    return { success: false, error: '推送时间格式无效，需为 HH:mm 格式，分钟为 00 或 30' }
  }

  try {
    const existing = await db.collection('subscriptions').where({
      openid: OPENID,
    }).get()

    if (existing.data.length === 0) {
      return { success: false, error: '未找到订阅记录' }
    }

    await db.collection('subscriptions').doc(existing.data[0]._id).update({
      data: {
        pushTime,
        updatedAt: db.serverDate(),
      },
    })

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