package config

import (
	"os"
	"strconv"
)

// Config 全局基础配置（仅保留服务启动及基础设施参数）
// 业务参数（极验、短信、微信、审核时限等）已统一移入 MySQL 数据库 yz_pw_system_configs 表管理
type Config struct {
	Port         string
	JWTSecret    string
	JWTExpireHrs int
	UploadDir    string

	// MySQL
	DBHost     string
	DBPort     string
	DBUser     string
	DBPassword string
	DBName     string
	DBCharset  string

	// 平台管理员账号（首次启动自动创建）
	AdminUsername string
	AdminPassword string

	// Redis（缓存/验证码/限流，连接失败自动降级内存）
	RedisHost     string
	RedisPort     string
	RedisPassword string
	RedisDB       int
}

var C *Config

func Load() *Config {
	C = &Config{
		Port:          getEnv("PORT", "8010"),
		JWTSecret:     getEnv("JWT_SECRET", "photowall-dev-secret-change-in-prod"),
		JWTExpireHrs:  getEnvInt("JWT_EXPIRE_HOURS", 3),
		UploadDir:     getEnv("UPLOAD_DIR", "uploads"),
		DBHost:        getEnv("DB_HOST", "212.64.112.158"),
		DBPort:        getEnv("DB_PORT", "3388"),
		// DBHost:      getEnv("DB_HOST", "10.31.100.3"),
		// DBPort:      getEnv("DB_PORT", "3306"),
		DBUser:        getEnv("DB_USER", "photowall"),
		DBPassword:    getEnv("DB_PASSWORD", "Dfn47yeKpyJfwz8n"),
		DBName:        getEnv("DB_NAME", "photowall"),
		DBCharset:     getEnv("DB_CHARSET", "utf8mb4"),
		AdminUsername: getEnv("ADMIN_USERNAME", "hero920103"),
		AdminPassword: getEnv("ADMIN_PASSWORD", "920103"),
		// Redis
		RedisHost:     getEnv("REDIS_HOST", "localhost"),
		RedisPort:     getEnv("REDIS_PORT", "6379"),
		RedisPassword: getEnv("REDIS_PASSWORD", ""),
		RedisDB:       getEnvInt("REDIS_DB", 0),
	}
	return C
}

// DSN 生成 MySQL 连接串
func (c *Config) DSN() string {
	return c.DBUser + ":" + c.DBPassword + "@tcp(" + c.DBHost + ":" + c.DBPort + ")/" +
		c.DBName + "?charset=" + c.DBCharset + "&parseTime=True&loc=Local"
}

func getEnv(key, def string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return def
}

func getEnvInt(key string, def int) int {
	if v := os.Getenv(key); v != "" {
		if n, err := strconv.Atoi(v); err == nil {
			return n
		}
	}
	return def
}