package config

import (
	"errors"
	"os"
	"strings"
)

type Config struct {
	Environment       string
	Port              string
	APIURL            string
	FrontendURL       string
	DatabaseURL       string
	DatabaseDirectURL string
	NeonAuthURL       string
	JobRunnerKey      string
	EmailFrom         string
	SMSFrom           string
	StripeSecretKey   string
	StripeWebhookKey  string
	StripePriceIDs    map[string]string
}

func Load() (Config, error) {
	cfg := Config{
		Environment:       valueOrDefault("BOOKRA_APP_ENV", "development"),
		Port:              valueOrDefault("BOOKRA_API_PORT", "8080"),
		APIURL:            valueOrDefault("BOOKRA_API_URL", "http://localhost:8080"),
		FrontendURL:       valueOrDefault("BOOKRA_FRONTEND_URL", "http://localhost:3000"),
		DatabaseURL:       strings.TrimSpace(os.Getenv("BOOKRA_DATABASE_URL")),
		DatabaseDirectURL: strings.TrimSpace(os.Getenv("BOOKRA_DATABASE_DIRECT_URL")),
		NeonAuthURL:       strings.TrimSpace(os.Getenv("BOOKRA_NEON_AUTH_URL")),
		JobRunnerKey:      strings.TrimSpace(os.Getenv("BOOKRA_JOB_RUNNER_KEY")),
		EmailFrom:         valueOrDefault("BOOKRA_EMAIL_FROM", "noreply@bookra.dev"),
		SMSFrom:           valueOrDefault("BOOKRA_SMS_FROM", "Bookra"),
		StripeSecretKey:   strings.TrimSpace(os.Getenv("BOOKRA_STRIPE_SECRET_KEY")),
		StripeWebhookKey:  strings.TrimSpace(os.Getenv("BOOKRA_STRIPE_WEBHOOK_SECRET")),
		StripePriceIDs: map[string]string{
			"starter":        strings.TrimSpace(os.Getenv("BOOKRA_STRIPE_STARTER_PRICE_ID")),
			"growth":         strings.TrimSpace(os.Getenv("BOOKRA_STRIPE_GROWTH_PRICE_ID")),
			"multi-location": strings.TrimSpace(os.Getenv("BOOKRA_STRIPE_MULTI_LOCATION_PRICE_ID")),
		},
	}

	if cfg.FrontendURL == "" {
		return Config{}, errors.New("BOOKRA_FRONTEND_URL is required")
	}

	return cfg, nil
}

func valueOrDefault(key string, fallback string) string {
	if value := strings.TrimSpace(os.Getenv(key)); value != "" {
		return value
	}
	return fallback
}