// 云函数 getDogDetail — 狗狗主页聚合：dog + 成就墙 + 近期记录
// 契约见 docs/03-云函数设计.md §5
const cloud = require('wx-server-sdk');
cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV });
const db = cloud.database();

const TOTAL_ACHIEVEMENTS = 6; // 与 miniprogram/utils/achievements.js 保持一致

exports.main = async (event) => {
  const { OPENID } = cloud.getWXContext();
  const { dogId } = event;
  if (!dogId) return { ok: false, code: 'INVALID', msg: '缺少 dogId' };

  // 校验归属
  const dogRes = await db.collection('dogs').doc(dogId).get().catch(() => null);
  if (!dogRes || !dogRes.data || dogRes.data._openid !== OPENID) {
    return { ok: false, code: 'FORBIDDEN', msg: '无权访问' };
  }

  const unlocked = await db.collection('dog_achievements')
    .where({ dogId })
    .orderBy('unlockedAt', 'desc')
    .get();

  // dogIds 是数组，等值查询匹配「数组包含」语义
  const recent = await db.collection('walks')
    .where({ _openid: OPENID, dogIds: dogId })
    .orderBy('startAt', 'desc')
    .limit(10)
    .get();

  return {
    ok: true,
    data: {
      dog: dogRes.data,
      achievements: { unlocked: unlocked.data, total: TOTAL_ACHIEVEMENTS },
      recentWalks: recent.data,
    },
  };
};