package config

import (
	"os"
	"strconv"
)

type Config struct {
	Server   ServerConfig
	Database DatabaseConfig
	Auth     AuthConfig
}

type ServerConfig struct {
	Port string
	Host string
	Env  string
}

type DatabaseConfig struct {
	Type     string // "sqlite" or "mysql"
	Host     string
	Port     string
	User     string
	Password string
	DBName   string
	SQLitePath string
}

type AuthConfig struct {
	JWTSecret     string
	TokenDuration int // in hours
}

func Load() *Config {
	return &Config{
		Server: ServerConfig{
			Port: getEnv("SERVER_PORT", "8080"),
			Host: getEnv("SERVER_HOST", "0.0.0.0"),
			Env:  getEnv("ENV", "development"),
		},
		Database: DatabaseConfig{
			Type:       getEnv("DB_TYPE", "sqlite"),
			Host:       getEnv("DB_HOST", "localhost"),
			Port:       getEnv("DB_PORT", "3306"),
			User:       getEnv("DB_USER", "root"),
			Password:   getEnv("DB_PASSWORD", ""),
			DBName:     getEnv("DB_NAME", "admintemplate"),
			SQLitePath: getEnv("SQLITE_PATH", "./data/admintemplate.db"),
		},
		Auth: AuthConfig{
			JWTSecret:     getEnv("JWT_SECRET", "your-secret-key-change-in-production"),
			TokenDuration: getEnvAsInt("TOKEN_DURATION", 24),
		},
	}
}

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

func getEnvAsInt(key string, defaultValue int) int {
	if value := os.Getenv(key); value != "" {
		if intVal, err := strconv.Atoi(value); err == nil {
			return intVal
		}
	}
	return defaultValue
}