package redismodel

import (
	"context"
	"fmt"
	"log/slog"
	"time"

	"git.lzcwy.cn/zhengchiliu/zt-closet-manage-backend/pkg/setting"
	"github.com/redis/go-redis/v9"
)

// RedisPrefix 是所有 Redis key 的全局命名空间前缀，避免多服务共享 Redis 实例时发生 key 冲突。
const RedisPrefix = "ztclosetadmin:"

// NewRedisEngine 根据配置创建 Redis 客户端并验证连接。
func NewRedisEngine(s *setting.RedisSettingS) (*redis.Client, error) {
	client := redis.NewClient(&redis.Options{
		Addr:            fmt.Sprintf("%s:%d", s.Host, s.Port),
		Password:        s.Password,
		DB:              s.DB,
		PoolSize:        s.PoolSize,
		MinIdleConns:    s.MinIdleConns,
		MaxIdleConns:    s.MaxIdleConns,
		MinRetryBackoff: time.Duration(s.MinRetryBackoff) * time.Millisecond,
		MaxRetryBackoff: time.Duration(s.MaxRetryBackoff) * time.Millisecond,
		MaxRetries:      s.MaxRetries,
		// 连接/读写/池超时配置单位为秒（与 config.yaml 注释一致）。
		DialTimeout:  time.Duration(s.DialTimeout) * time.Second,
		ReadTimeout:  time.Duration(s.ReadTimeout) * time.Second,
		WriteTimeout: time.Duration(s.WriteTimeout) * time.Second,
		PoolTimeout:  time.Duration(s.PoolTimeout) * time.Second,
	})

	if err := client.Ping(context.Background()).Err(); err != nil {
		return nil, fmt.Errorf("redis ping failed: %w", err)
	}

	slog.Info("redis connected", "addr", fmt.Sprintf("%s:%d", s.Host, s.Port))
	return client, nil
}