package config

import (
	"fmt"
	"os"
	"strconv"

	"github.com/joho/godotenv"
)

// Config holds the application configuration
type Config struct {
	ServerPort       string
	DatabaseURL      string
	JWTSecret        string
	CheckInInterval  int
	OfflineThreshold int
	Timezone         string
}

// Load reads configuration from environment variables
func Load() (*Config, error) {
	// Load .env file if it exists (for development)
	_ = godotenv.Load()

	checkInInterval, _ := strconv.Atoi(getEnv("CHECK_IN_INTERVAL", "300"))
	offlineThreshold, _ := strconv.Atoi(getEnv("OFFLINE_THRESHOLD", "600"))

	cfg := &Config{
		ServerPort:       getEnv("SERVER_PORT", "8080"),
		DatabaseURL:      getEnv("DATABASE_URL", "postgres://aggregator:aggregator@localhost:5432/aggregator?sslmode=disable"),
		JWTSecret:        getEnv("JWT_SECRET", "test-secret-for-development-only"),
		CheckInInterval:  checkInInterval,
		OfflineThreshold: offlineThreshold,
		Timezone:         getEnv("TIMEZONE", "UTC"),
	}

	// Debug: Log what JWT secret we're using (remove in production)
	if cfg.JWTSecret == "test-secret-for-development-only" {
		fmt.Printf("🔓 Using development JWT secret\n")
	}

	return cfg, nil
}

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