package configs

import (
	"log"
	"os"
	"strconv"
	"strings"

	"github.com/joho/godotenv"
)

type Config struct {
	Env                      string // örn. development, production
	Port                     string
	DBUrl                    string
	JWTSecret                string
	AppURL                   string
	ApiAppURL                string // örn. https://api.example.com - e-posta doğrulama linkleri için kullanılır
	GoogleClientID           string
	GoogleClientSecret       string
	GithubClientID           string
	GithubClientSecret       string
	GoogleRedirectURL        string
	GithubRedirectURL        string
	ClientCallbackURL        string
	OAuthRedirectURL         string
	RedisUrl                 string
	AccessTokenExpireMinutes int
	RefreshTokenExpireDays   int

	// Avatar Ayarları
	AvatarHeight  int
	AvatarWidth   int
	AvatarQuality int
	AvatarFormat  string
	AvatarMode    string // cover, contain, resize

	// Ana Sayfa Resim Ayarları
	HomeImageHeight  int
	HomeImageWidth   int
	HomeImageQuality int
	HomeImageFormat  string
	HomeImageMode    string // cover, contain, resize

	// Hakkında Resim Ayarları
	AboutImageHeight  int
	AboutImageWidth   int
	AboutImageQuality int
	AboutImageFormat  string
	AboutImageMode    string // cover, contain, resize

	// Servis Resim Ayarları
	ServiceImageHeight  int
	ServiceImageWidth   int
	ServiceImageQuality int
	ServiceImageFormat  string
	ServiceImageMode    string // cover, contain, resize

	// Gönderi Resim Ayarları
	PostImageHeight  int
	PostImageWidth   int
	PostImageQuality int
	PostImageFormat  string
	PostImageMode    string // cover, contain, resize

	// Gönderi Kategori Resim Ayarları
	PostCategoryImageHeight  int
	PostCategoryImageWidth   int
	PostCategoryImageQuality int
	PostCategoryImageFormat  string
	PostCategoryImageMode    string // cover, contain, resize

	// Site Logo Ayarları
	SettingsLogoHeight  int
	SettingsLogoWidth   int
	SettingsLogoQuality int
	SettingsLogoFormat  string
	SettingsLogoMode    string // cover, contain, resize

	// Afiş Resim Ayarları
	BannerImageHeight  int
	BannerImageWidth   int
	BannerImageQuality int
	BannerImageFormat  string
	BannerImageMode    string // cover, contain, resize

	// Afiş Küçük Resim (Thumb) Ayarları
	BannerThumbHeight  int
	BannerThumbWidth   int
	BannerThumbQuality int
	BannerThumbFormat  string
	BannerThumbMode    string // cover, contain, resize

	// E-posta Ayarları
	EmailHost         string
	EmailPort         string
	EmailHostUser     string
	EmailHostPassword string
	EmailFrom         string

	// Debug / Logging
	Debug     bool // SET_DEBUG=true ise middleware ve diğer debug logları açılır
	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 {
		log.Printf("Uyarı: .env dosyası yüklenirken hata oluştu: %v — sistem ortam değişkenleriyle devam ediliyor", err)
	}
	log.Printf(".env ENV YUKLENDI")
	AppConfig = &Config{
		Env:                      getEnv("APP_ENV", "development"),
		Port:                     getEnv("PORT", "8080"),
		DBUrl:                    getEnv("DB_URL", ""),
		JWTSecret:                getEnv("JWT_SECRET", "go-gin-mTFY2jAOMWWxadVIWjRoPG9aOM3z9srCVoU35Gs1VZaRKgXet26cztUE8LLpwok9"),
		AppURL:                   getEnv("APP_URL", "http://localhost:8080"),
		ApiAppURL:                getEnv("BASE_SITE_URL", "http://localhost:3000"),
		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

		// Avatar Varsayılanları
		AvatarHeight:  getEnvAsInt("AVATAR_H", 0),    // Varsayılan 0 (otomatik)
		AvatarWidth:   getEnvAsInt("AVATAR_W", 800),  // Varsayılan 800
		AvatarQuality: getEnvAsInt("AVATAR_Q", 80),   // Varsayılan 80
		AvatarFormat:  getEnv("AVATAR_F", "webp"),    // Varsayılan webp
		AvatarMode:    getEnv("AVATAR_B", "contain"), // Varsayılan contain (Fit)

		// Ana Sayfa Resim Varsayılanları
		HomeImageHeight:  getEnvAsInt("HOME_IMAGE_H", 0),    // Varsayılan 0 (otomatik)
		HomeImageWidth:   getEnvAsInt("HOME_IMAGE_W", 800),  // Varsayılan 800
		HomeImageQuality: getEnvAsInt("HOME_IMAGE_Q", 80),   // Varsayılan 80
		HomeImageFormat:  getEnv("HOME_IMAGE_F", "webp"),    // Varsayılan webp
		HomeImageMode:    getEnv("HOME_IMAGE_B", "contain"), // Varsayılan contain (Fit)

		// Hakkında Resim Varsayılanları
		AboutImageHeight:  getEnvAsInt("ABOUTME_IMAGE_H", getEnvAsInt("ABOUT_IMAGE_H", 0)),
		AboutImageWidth:   getEnvAsInt("ABOUTME_IMAGE_W", getEnvAsInt("ABOUT_IMAGE_W", 800)),
		AboutImageQuality: getEnvAsInt("ABOUTME_IMAGE_Q", getEnvAsInt("ABOUT_IMAGE_Q", 80)),
		AboutImageFormat:  getEnv("ABOUTME_IMAGE_F", getEnv("ABOUT_IMAGE_F", "webp")),
		AboutImageMode:    getEnv("ABOUTME_IMAGE_B", getEnv("ABOUT_IMAGE_B", "contain")),

		// Servis Resim Varsayılanları
		ServiceImageHeight:  getEnvAsInt("SERVICE_IMAGE_H", 256),
		ServiceImageWidth:   getEnvAsInt("SERVICE_IMAGE_W", 256),
		ServiceImageQuality: getEnvAsInt("SERVICE_IMAGE_Q", 90),
		ServiceImageFormat:  getEnv("SERVICE_IMAGE_F", "png"),
		ServiceImageMode:    getEnv("SERVICE_IMAGE_B", "cover"),

		// Gönderi Resim Varsayılanları
		PostImageHeight:  getEnvAsInt("POST_IMAGE_H", 450),
		PostImageWidth:   getEnvAsInt("POST_IMAGE_W", 700),
		PostImageQuality: getEnvAsInt("POST_IMAGE_Q", 90),
		PostImageFormat:  getEnv("POST_IMAGE_F", "webp"),
		PostImageMode:    getEnv("POST_IMAGE_B", "cover"),

		// Gönderi Kategori Resim Varsayılanları
		PostCategoryImageHeight:  getEnvAsInt("POST_CATEGORY_IMAGE_H", 300),
		PostCategoryImageWidth:   getEnvAsInt("POST_CATEGORY_IMAGE_W", 300),
		PostCategoryImageQuality: getEnvAsInt("POST_CATEGORY_IMAGE_Q", 85),
		PostCategoryImageFormat:  getEnv("POST_CATEGORY_IMAGE_F", "png"),
		PostCategoryImageMode:    getEnv("POST_CATEGORY_IMAGE_B", "cover"),

		// Site Logo Varsayılanları
		SettingsLogoHeight:  getEnvAsInt("SETTINGS_LOGO_H", 54),
		SettingsLogoWidth:   getEnvAsInt("SETTINGS_LOGO_W", 165),
		SettingsLogoQuality: getEnvAsInt("SETTINGS_LOGO_Q", 85),
		SettingsLogoFormat:  getEnv("SETTINGS_LOGO_F", "png"),
		SettingsLogoMode:    getEnv("SETTINGS_LOGO_B", "cover"),

		// Afiş Resim Varsayılanları
		BannerImageHeight:  getEnvAsInt("BANNER_IMAGE_H", 700),
		BannerImageWidth:   getEnvAsInt("BANNER_IMAGE_W", 1920),
		BannerImageQuality: getEnvAsInt("BANNER_IMAGE_Q", 85),
		BannerImageFormat:  getEnv("BANNER_IMAGE_F", "webp"),
		BannerImageMode:    getEnv("BANNER_IMAGE_B", "cover"),

		// Afiş Küçük Resim (Thumb) Varsayılanları
		BannerThumbHeight:  getEnvAsInt("BANNER_THUMB_H", 48),
		BannerThumbWidth:   getEnvAsInt("BANNER_THUMB_W", 48),
		BannerThumbQuality: getEnvAsInt("BANNER_THUMB_Q", 90),
		BannerThumbFormat:  getEnv("BANNER_THUMB_F", "png"),
		BannerThumbMode:    getEnv("BANNER_THUMB_B", "cover"),

		// 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"),

		// Debug / Logging
		Debug:     getEnvAsBool("SET_DEBUG", false),
		CorsDebug: getEnvAsBool("CORS_DEBUG", false),
	}
}

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
}