package cache

import (
	"context"
	"eta_mini_ht_api/common/component/config"
	logger "eta_mini_ht_api/common/component/log"
	"github.com/go-redis/redis/v8"
	"log"
	"strings"
	"sync"
	"time"
)

var (
	redisCache *RedisCache
	once       sync.Once
)

func GetInstance() *RedisCache {
	once.Do(func() {
		redisConf, ok := config.GetConfig("redis").(*config.RedisConfig)
		// 检查是否成功获取到RedisConfig实例
		if !ok {
			logger.Info("加载redis配置失败")
			return
		}
		opts, ok := redisConf.GetConfig().(config.RedisOpts)
		// 检查Host是否已设置，然后初始化或执行相应操作
		if ok && opts.Host != "" {
			logger.Info("初始化redis")
			// 这里可以添加初始化Redis的逻辑
			redisCache = newRedis(opts)
		} else {
			logger.Info("Redis configuration is incomplete: Host is missing")
			return
		}
	})
	return redisCache
}
func newRedis(opts config.RedisOpts) *RedisCache {
	if &opts == nil || opts.Host == "" {
		log.Fatalf("redis 连接失败")
	}
	redisTemplate := redis.NewUniversalClient(&redis.UniversalOptions{
		Addrs:        strings.Split(opts.Host, ";"),
		DB:           opts.Database,
		Password:     opts.Password,
		IdleTimeout:  time.Second * time.Duration(opts.IdleTimeout),
		MinIdleConns: opts.MaxIdle,
	})
	return &RedisCache{redisTemplate: redisTemplate}
}

// RedisCache
// @Description: redis缓存
type RedisCache struct {
	redisTemplate redis.UniversalClient
}

// GetString  获取一个值
func (r *RedisCache) GetString(key string) string {
	return r.GetStringWithContext(context.Background(), key)

}

// GetStringWithContext  获取一个值
func (r *RedisCache) GetStringWithContext(ctx context.Context, key string) (value string) {
	value, _ = r.redisTemplate.Get(ctx, key).Result()
	return
}

// SetString 设置一个值
func (r *RedisCache) SetString(key string, val string, timeout time.Duration) error {
	return r.redisTemplate.SetEX(context.Background(), key, val, timeout).Err()
}

// SetStringWithContext  设置一个值
func (r *RedisCache) SetStringWithContext(ctx context.Context, key string, val string, timeout time.Duration) error {
	return r.redisTemplate.SetEX(ctx, key, val, timeout).Err()
}

// IsExist 判断key是否存在
func (r *RedisCache) IsExist(key string) bool {
	return r.IsExistWithContext(context.Background(), key)
}

// IsExistWithContext 判断key是否存在
func (r *RedisCache) IsExistWithContext(ctx context.Context, key string) bool {
	result, _ := r.redisTemplate.Exists(ctx, key).Result()
	return result > 0
}

// Delete 删除
func (r *RedisCache) Delete(key string) error {
	return r.DeleteWithContext(context.Background(), key)
}

// DeleteWithContext  删除
func (r *RedisCache) DeleteWithContext(ctx context.Context, key string) error {
	return r.redisTemplate.Del(ctx, key).Err()
}

// Do	执行指令
func (r *RedisCache) Do(commandName string, args ...interface{}) (reply interface{}, err error) {
	return r.DoWithContext(context.Background(), commandName, args...)
}

// DoWithContext 执行指令
func (r *RedisCache) DoWithContext(ctx context.Context, commandName string, args ...interface{}) (reply interface{}, err error) {
	newArgs := []interface{}{commandName}
	newArgs = append(newArgs, args...)
	return r.redisTemplate.Do(ctx, newArgs...).Result()
}