package config

import (
	"os"
	"time"
)

type Config struct {
	ServerPort   string
	SM3Salt      string
	SM4Key       string
	ReadTimeout  time.Duration
	WriteTimeout time.Duration
}

func LoadConfig() *Config {
	port := getEnv("SERVER_PORT", "8080")
	sm3Salt := getEnv("SM3_SALT", "default_salt_change_me")
	sm4Key := getEnv("SM4_KEY", "default_key_16by")

	return &Config{
		ServerPort:   port,
		SM3Salt:      sm3Salt,
		SM4Key:       sm4Key,
		ReadTimeout:  30 * time.Second,
		WriteTimeout: 30 * time.Second,
	}
}

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