package configs

import (
	"os"
	"strconv"
	"strings"

	"github.com/joho/godotenv"
	"go.uber.org/zap"
)

type Config struct {
	Env                      string // örn. development, production
	Port                     string
	DBUrl                    string
	DBPGUrl                    string
	JWTSecret                string
	AppURL                   string // örn. https://api.example.com - e-posta doğrulama linkleri için kullanılır
	ImageAPIURL              string // Harici resim işleme servisi
	ImageAPIKey              string
	ImageAPIEmail            string
	ImageAPIPassword         string
	GoogleClientID           string
	GoogleClientSecret       string
	GithubClientID           string
	GithubClientSecret       string
	GoogleRedirectURL        string
	GithubRedirectURL        string
	ClientCallbackURL        string
	OAuthRedirectURL         string
	RedisUrl                 string
	AccessTokenExpireMinutes int
	RefreshTokenExpireDays   int
	// E-posta Ayarları
	EmailHost         string
	EmailPort         string
	EmailHostUser     string
	EmailHostPassword string
	EmailFrom         string
	CorsDebug         bool
}

var AppConfig *Config

func LoadConfig() {
	err := godotenv.Load()
	if err != nil {
		// Eğer proje kök dizininden çalıştırılmıyorsa (örn: cmd/app içinden), üst dizinleri kontrol et
		err = godotenv.Load(".env")
		//err = godotenv.Load("../../.env")
	}
	if err != nil {
		// Logger henüz hazır olmayabilir; varsa kullan
		if Logger != nil {
			Logger.Warn("Uyarı: .env dosyası yüklenirken hata oluştu, sistem ortam değişkenleriyle devam ediliyor", zapFieldsForEnvError(err)...)
		}
	}

	AppConfig = &Config{
		Env:                      getEnv("APP_ENV", "development"),
		Port:                     getEnv("PORT", "8080"),
		DBUrl:                    getEnv("DB_URL", ""),
		DBPGUrl:                  getEnv("DB_URL_PG", ""),
		JWTSecret:                getEnv("JWT_SECRET", "default_secret"),
		AppURL:                   getEnv("APP_URL", "http://localhost:8080"),
		GoogleClientID:           getEnv("GOOGLE_CLIENT_ID", ""),
		GoogleClientSecret:       getEnv("GOOGLE_CLIENT_SECRET", ""),
		GithubClientID:           getEnv("GITHUB_CLIENT_ID", ""),
		GithubClientSecret:       getEnv("GITHUB_CLIENT_SECRET", ""),
		GoogleRedirectURL:        getEnv("GOOGLE_REDIRECT_URL", "http://localhost:8080/api/v1/auth/google/callback"),
		GithubRedirectURL:        getEnv("GITHUB_REDIRECT_URL", "http://localhost:8080/api/v1/auth/github/callback"),
		ClientCallbackURL:        getEnv("CLIENT_CALLBACK_URL", ""),
		OAuthRedirectURL:         getEnv("OAUTH_REDIRECT_URL", ""),
		RedisUrl:                 getEnv("REDIS_URL", ""),
		AccessTokenExpireMinutes: getEnvAsInt("ACCESS_TOKEN_EXPIRE_MINUTES", 120), // Varsayılan 120 dakika
		RefreshTokenExpireDays:   getEnvAsInt("REFRESH_TOKEN_EXPIRE_DAYS", 30),    // Varsayılan 30 gün

		// E-posta Varsayılanları
		EmailHost:         getEnv("EMAIL_HOST", "localhost"),
		EmailPort:         getEnv("EMAIL_PORT", "1025"),
		EmailHostUser:     getEnv("EMAIL_HOST_USER", ""),
		EmailHostPassword: getEnv("EMAIL_HOST_PASSWORD", ""),
		EmailFrom:         getEnv("EMAIL_FROM", "noreply@gauth.local"),
		CorsDebug:         getEnvAsBool("CORS_DEBUG", false),
		ImageAPIURL:       getEnv("IMAGE_API_URL", "https://v2.beyhano.com.tr"),
		ImageAPIKey:       getEnv("IMAGE_API_KEY", ""),
		ImageAPIEmail:     getEnv("IMAGE_API_EMAIL", ""),
		ImageAPIPassword:  getEnv("IMAGE_API_PASSWORD", ""),
	}
}

func getEnv(key, fallback string) string {
	if value, exists := os.LookupEnv(key); exists {
		return value
	}
	return fallback
}

func getEnvAsInt(key string, fallback int) int {
	valueStr := getEnv(key, "")
	if valueStr == "" {
		return fallback
	}
	value, err := strconv.Atoi(valueStr)
	if err != nil {
		return fallback
	}
	return value
}

func getEnvAsBool(key string, fallback bool) bool {
	valueStr := strings.TrimSpace(getEnv(key, ""))
	if valueStr == "" {
		return fallback
	}
	value, err := strconv.ParseBool(valueStr)
	if err != nil {
		return fallback
	}
	return value
}

func zapFieldsForEnvError(err error) []zap.Field {
	return []zap.Field{
		zap.String("error", err.Error()),
	}
}