package cache

import (
	"sync"
	"time"

	"git.links123.net/Slate/CorpusAI/config"
	"git.links123.net/links123.com/pkg/middleware/auth"
	"github.com/go-redis/redis"
	"github.com/sirupsen/logrus"
)

var (
	client  *redis.Client
	session auth.Session
	once    = &sync.Once{}
)

// Init 初始化缓存
func Init() {
	once.Do(func() {
		redisConfig := config.C.Redis

		client = redis.NewClient(&redis.Options{
			Addr:     redisConfig.Address,
			Password: redisConfig.Password,
			PoolSize: redisConfig.PoolSize,
		})

		for {
			if err := client.Ping().Err(); err != nil {
				logrus.Warn("waiting for redis server start...")
				time.Sleep(3 * time.Second)
				continue
			}

			logrus.Info("connect to redis successful")

			break
		}

		if config.C.App.Debug {
			session = auth.NewDebugSessionStore()
		} else {
			session = auth.NewRedisSessionStore(redisConfig.Address, redisConfig.Password)
		}
	})
}

// Close 退出时关闭链接
func Close() {
	if client != nil {
		err := client.Close()
		if err != nil {
			logrus.Errorf("close redis connection error: %s", err.Error())
			return
		}
		logrus.Info("redis connection closed")
	}
}