package utils

import (
	"context"
	"fmt"
	"go-policy-service/config"
	"time"

	"github.com/go-redis/redis/v8"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
)

var Db *gorm.DB
var Rdb *redis.Client

func InitDB(cfg *config.Config) error {
	dsn := getDSN(cfg)
	conn, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
	if err != nil {
		return err
	}
	Db = conn
	return nil
}

func getDSN(cfg *config.Config) string {
	return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8mb4",
		cfg.DBUser,
		cfg.DBPassword,
		cfg.DBHost,
		cfg.DBPort,
		cfg.DBName)
}

// 初始化 Redis
func InitRedis(cfg *config.Config) error {
	Rdb = redis.NewClient(&redis.Options{
		Addr:     fmt.Sprintf("%s:%d", cfg.RedisHost, cfg.RedisPort),
		Password: cfg.RedisPassword,
		DB:       cfg.RedisDB,
	})
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	if _, err := Rdb.Ping(ctx).Result(); err != nil {
		return fmt.Errorf("redis connection failed: %w", err)
	}

	return nil
}