package config

import (
	"encoding/hex"
	"fmt"
	"os"
)

type Config struct {
	DatabaseURL   string
	JWTSecret     string
	EncryptionKey []byte
	Port          string
	ScraperURL    string
	AdminEmail    string
	AdminPassword string
}

func Load() (*Config, error) {
	dbURL := os.Getenv("DATABASE_URL")
	if dbURL == "" {
		return nil, fmt.Errorf("DATABASE_URL is required")
	}

	jwtSecret := os.Getenv("JWT_SECRET")
	if jwtSecret == "" {
		return nil, fmt.Errorf("JWT_SECRET is required")
	}

	encHex := os.Getenv("ENCRYPTION_KEY")
	if encHex == "" {
		return nil, fmt.Errorf("ENCRYPTION_KEY is required")
	}
	encKey, err := hex.DecodeString(encHex)
	if err != nil || len(encKey) != 32 {
		return nil, fmt.Errorf("ENCRYPTION_KEY must be a valid 32-byte hex string")
	}

	port := os.Getenv("PORT")
	if port == "" {
		port = "8080"
	}

	scraperURL := os.Getenv("SCRAPER_URL")
	if scraperURL == "" {
		scraperURL = "http://scraper:3001"
	}

	return &Config{
		DatabaseURL:   dbURL,
		JWTSecret:     jwtSecret,
		EncryptionKey: encKey,
		Port:          port,
		ScraperURL:    scraperURL,
		AdminEmail:    os.Getenv("ADMIN_EMAIL"),
		AdminPassword: os.Getenv("ADMIN_PASSWORD"),
	}, nil
}