package redisx

import (
	"context"
	"fmt"
	"sync"
	"time"

	"github.com/redis/go-redis/v9"
)

// 统一初始化与连接管理（支持单机、哨兵、集群）

var (
	client redis.UniversalClient
	once   sync.Once
)

type Config struct {
	Mode         string
	Addrs        []string
	Username     string
	Password     string
	DB           int
	MasterName   string
	PoolSize     int
	MinIdleConns int
	DialTimeout  time.Duration
	ReadTimeout  time.Duration
	WriteTimeout time.Duration
}

func Init(cfg *Config) {
	once.Do(func() {
		client = redis.NewUniversalClient(&redis.UniversalOptions{
			Addrs:        cfg.Addrs,
			Username:     cfg.Username,
			Password:     cfg.Password,
			DB:           cfg.DB,
			MasterName:   cfg.MasterName,
			PoolSize:     cfg.PoolSize,
			MinIdleConns: cfg.MinIdleConns,
			DialTimeout:  cfg.DialTimeout,
			ReadTimeout:  cfg.ReadTimeout,
			WriteTimeout: cfg.WriteTimeout,
		})

		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
		defer cancel()
		if ping := client.Do(ctx, "PING"); ping.Err() != nil {
			fmt.Println(cfg.Addrs)
			errStr := fmt.Sprintf("Redis 无法访问: %s", ping.Err().Error())
			panic(errStr)
		}
	})
}

// getClient 获取 Redis 客户端
func getClient() redis.UniversalClient {
	if client == nil {
		panic("redisx not initialized, call redisx.Init() first")
	}
	return client
}

// Close 关闭 Redis 连接
func Close() error {
	if client != nil {
		return client.Close()
	}
	return nil
}