package homeser

import (
	"encoding/json"
	"time"
	"videoweb/app/api/proto"
	"videoweb/pub/common/log"
	"videoweb/pub/redis"
)

const (
	appHomeCacheKey = "app:home:data"
	appHomeCacheTTL = time.Minute * 5
)

// getHomeDataCache 读取 APP 首页 Redis 缓存，缓存异常时降级查库
func getHomeDataCache() *proto.DataResp {
	cacheData, err1 := redis.Get(appHomeCacheKey)
	if err1 != nil {
		log.Warn("读取APP首页缓存失败", log.Any("cacheKey", appHomeCacheKey), log.E(err1))
		return nil
	}
	if cacheData == nil || *cacheData == "" {
		return nil
	}
	resp := &proto.DataResp{}
	if err1 := json.Unmarshal([]byte(*cacheData), resp); err1 != nil {
		log.Warn("解析APP首页缓存失败", log.Any("cacheKey", appHomeCacheKey), log.E(err1))
		return nil
	}
	return resp
}

// setHomeDataCache 写入 APP 首页 Redis 缓存，缓存异常不影响主流程
func setHomeDataCache(resp proto.DataResp) {
	bytes, err1 := json.Marshal(resp)
	if err1 != nil {
		log.Warn("序列化APP首页缓存失败", log.Any("cacheKey", appHomeCacheKey), log.E(err1))
		return
	}
	if err1 := redis.Set(appHomeCacheKey, string(bytes), appHomeCacheTTL); err1 != nil {
		log.Warn("写入APP首页缓存失败", log.Any("cacheKey", appHomeCacheKey), log.E(err1))
	}
}