package config

import (
	"os"
	"strconv"

	"github.com/joho/godotenv"
)

type Config struct {
	Port           string
	Secret         string
	Env            string
	DatabaseURL    string
	AdminEmail     string
	AdminPassword  string
	AdminName      string
	PostgresHost   string
	PostgresPort   string
	PostgresDB     string
	PostgresUser   string
	PostgresPass   string
}

func Load() (*Config, error) {
	_ = godotenv.Load()

	// Dokploy / PaaS often set PORT; prefer APP_PORT, then PORT.
	port := getEnv("APP_PORT", "")
	if port == "" {
		port = getEnv("PORT", "8080")
	}

	cfg := &Config{
		Port:          port,
		Secret:        getEnv("APP_SECRET", "dev-secret-change-me"),
		Env:           getEnv("APP_ENV", "development"),
		DatabaseURL:   os.Getenv("DATABASE_URL"),
		AdminEmail:    getEnv("ADMIN_EMAIL", "admin@panel.local"),
		AdminPassword: getEnv("ADMIN_PASSWORD", "Admin123!ChangeMe"),
		AdminName:     getEnv("ADMIN_NAME", "Administrator"),
		PostgresHost:  getEnv("POSTGRES_HOST", "localhost"),
		PostgresPort:  getEnv("POSTGRES_PORT", "5432"),
		PostgresDB:    getEnv("POSTGRES_DB", "vpn_panel"),
		PostgresUser:  getEnv("POSTGRES_USER", "vpn_admin"),
		PostgresPass:  getEnv("POSTGRES_PASSWORD", "VpnDb_Secure_Pass_17"),
	}

	if cfg.DatabaseURL == "" {
		cfg.DatabaseURL = "postgres://" + cfg.PostgresUser + ":" + cfg.PostgresPass +
			"@" + cfg.PostgresHost + ":" + cfg.PostgresPort + "/" + cfg.PostgresDB + "?sslmode=disable"
	}

	return cfg, nil
}

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

func (c *Config) PortInt() int {
	n, err := strconv.Atoi(c.Port)
	if err != nil {
		return 8080
	}
	return n
}