package config

import (
	"fmt"
	"os"

	"github.com/joho/godotenv"
)

type Config struct {
	DBPath             string
	Port               string
	AppURL             string
	JWTSecret          string
	JWTExpiry          string
	RefreshTokenExpiry string
	DefaultTimezone    string
	SMTPHost           string
	SMTPPort           string
	SMTPUser           string
	SMTPPassword       string
	SMTPFrom           string
	SupportEmail       string
	SendWelcomeEmail   string
	RegistrationMode   string
}

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

	cfg := &Config{
		DBPath:             os.Getenv("DB_PATH"),
		Port:               getEnvOrDefault("PORT", "8080"),
		AppURL:             getEnvOrDefault("APP_URL", "http://localhost:8080"),
		JWTSecret:          os.Getenv("JWT_SECRET"),
		JWTExpiry:          os.Getenv("JWT_EXPIRY"),
		RefreshTokenExpiry: os.Getenv("REFRESH_TOKEN_EXPIRY"),
		DefaultTimezone:    os.Getenv("DEFAULT_TIMEZONE"),
		SMTPHost:           os.Getenv("SMTP_HOST"),
		SMTPPort:           getEnvOrDefault("SMTP_PORT", "587"),
		SMTPUser:           os.Getenv("SMTP_USER"),
		SMTPPassword:       os.Getenv("SMTP_PASSWORD"),
		SMTPFrom:           os.Getenv("SMTP_FROM"),
		SupportEmail:       getEnvOrDefault("SUPPORT_EMAIL", "contact@apocapoc.app"),
		SendWelcomeEmail:   getEnvOrDefault("SEND_WELCOME_EMAIL", "false"),
		RegistrationMode:   getEnvOrDefault("REGISTRATION_MODE", "open"),
	}

	if cfg.DBPath == "" {
		return nil, fmt.Errorf("DB_PATH is required")
	}
	if cfg.AppURL == "" {
		return nil, fmt.Errorf("APP_URL is required")
	}
	if cfg.JWTSecret == "" {
		return nil, fmt.Errorf("JWT_SECRET is required")
	}
	if cfg.JWTExpiry == "" {
		return nil, fmt.Errorf("JWT_EXPIRY is required")
	}
	if cfg.RefreshTokenExpiry == "" {
		return nil, fmt.Errorf("REFRESH_TOKEN_EXPIRY is required")
	}
	if cfg.DefaultTimezone == "" {
		return nil, fmt.Errorf("DEFAULT_TIMEZONE is required")
	}

	return cfg, nil
}

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