package config

import (
	"fmt"
	"os"
	"strconv"
	"strings"
)

type Config struct {
	AppEnv      string
	Port        string
	DatabaseURL string
	FrontendURL string
	JWTSecret   string
	NeonAuthURL string

	SMTPHost     string
	SMTPPort     int
	SMTPUsername string
	SMTPPassword string
	EmailFrom    string

	GoogleClientID     string
	GoogleClientSecret string
	GoogleRedirectURL  string

	StripeSecretKey     string
	StripeWebhookSecret string
	StripePriceIDs      map[string]string
}

func Load() (*Config, error) {
	port := getEnv("PORT", "8081")

	dbURL := getEnv("DATABASE_URL", "")
	if dbURL == "" {
		return nil, fmt.Errorf("DATABASE_URL is required")
	}

	smtpPort, _ := strconv.Atoi(getEnv("SMTP_PORT", "465"))

	return &Config{
		AppEnv:      getEnv("APP_ENV", "development"),
		Port:        port,
		DatabaseURL: dbURL,
		FrontendURL: getEnv("FRONTEND_URL", "http://localhost:3000"),
		JWTSecret:   getEnv("JWT_SECRET", "change-me-in-production"),
		NeonAuthURL: getEnv("NEON_AUTH_URL", ""),

		SMTPHost:     getEnv("SMTP_HOST", "smtp.purelymail.com"),
		SMTPPort:     smtpPort,
		SMTPUsername: getEnvAllowEmpty("SMTP_USERNAME", "noreply@tdvorak.dev"),
		SMTPPassword: getEnv("SMTP_PASSWORD", ""),
		EmailFrom:    getEnv("EMAIL_FROM", "noreply@tdvorak.dev"),

		GoogleClientID:     getEnv("GOOGLE_CLIENT_ID", ""),
		GoogleClientSecret: getEnv("GOOGLE_CLIENT_SECRET", ""),
		GoogleRedirectURL:  getEnv("GOOGLE_REDIRECT_URL", ""),

		StripeSecretKey:     getEnv("STRIPE_SECRET_KEY", ""),
		StripeWebhookSecret: getEnv("STRIPE_WEBHOOK_SECRET", ""),
		StripePriceIDs: map[string]string{
			"monthly":        getEnv("STRIPE_PRICE_ID", ""),
			"starter":        getEnv("STRIPE_STARTER_PRICE_ID", ""),
			"growth":         getEnv("STRIPE_GROWTH_PRICE_ID", ""),
			"multi-location": getEnv("STRIPE_MULTI_LOCATION_PRICE_ID", ""),
			"pro":            getEnv("STRIPE_PRO_PRICE_ID", ""),
			"business":       getEnv("STRIPE_BUSINESS_PRICE_ID", ""),
			"starter:czk":    getEnv("STRIPE_STARTER_CZK_PRICE_ID", ""),
			"starter:usd":    getEnv("STRIPE_STARTER_USD_PRICE_ID", ""),
			"pro:czk":        getEnv("STRIPE_PRO_CZK_PRICE_ID", ""),
			"pro:usd":        getEnv("STRIPE_PRO_USD_PRICE_ID", ""),
			"business:czk":   getEnv("STRIPE_BUSINESS_CZK_PRICE_ID", ""),
			"business:usd":   getEnv("STRIPE_BUSINESS_USD_PRICE_ID", ""),
		},
	}, nil
}

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

func getEnvAllowEmpty(key, defaultVal string) string {
	if v, ok := os.LookupEnv(key); ok {
		return v
	}
	return defaultVal
}

func (cfg *Config) StripeSecretConfigured() bool {
	return strings.TrimSpace(cfg.StripeSecretKey) != ""
}

func (cfg *Config) StripeWebhookConfigured() bool {
	return strings.TrimSpace(cfg.StripeWebhookSecret) != ""
}

func (cfg *Config) StripeHasAnyPriceConfigured() bool {
	for _, priceID := range cfg.StripePriceIDs {
		if strings.TrimSpace(priceID) != "" {
			return true
		}
	}
	return false
}

func (cfg *Config) StripeCheckoutReady() bool {
	return cfg.StripeSecretConfigured() && cfg.StripeHasAnyPriceConfigured()
}