//
// adapter_redis.go
// Copyright (C) 2022 tiglog <me@tiglog.com>
//
// Distributed under terms of the MIT license.
//

package gcache

import (
	"context"
	"sync"
	"time"

	"github.com/go-redis/redis/v8"
)

// 使用 redis 服务缓存
type redisCacheAdapter struct {
	mu    sync.Mutex
	redis *redis.Client
}

func NewRedisCacheAdapter(rds *redis.Client) ICacheAdapter {
	return &redisCacheAdapter{
		redis: rds,
	}
}

func (c *redisCacheAdapter) Get(key string, dest interface{}) error {
	cmd := c.redis.Get(context.Background(), key)
	return cmd.Scan(dest)
}

func (c *redisCacheAdapter) Set(key string, val interface{}, ttl time.Duration) error {
	cmd := c.redis.Set(context.Background(), key, val, ttl)
	return cmd.Err()
}

func (c *redisCacheAdapter) Has(key string) bool {
	cmd := c.redis.Exists(context.Background(), key)
	result, _ := cmd.Result()
	if result == 1 {
		return true
	}
	return false
}

func (c *redisCacheAdapter) Del(keys ...string) (int64, error) {
	cmd := c.redis.Del(context.Background(), keys...)
	return cmd.Result()
}