package config

import (
	"os"
	"strings"

	"github.com/joho/godotenv"
	"go.uber.org/zap"
)

type Config struct {
	URI      string
	Username string
	Password string
	Topics   []string
}

func NewConfig(logger *zap.Logger) *Config {
	err := godotenv.Load()
	if err != nil {
		logger.Warn("Error loading .env file, using environment variables")
	}

	uri := os.Getenv("MQTT_URI")
	if uri == "" {
		logger.Fatal("MQTT_URI is not set")
	}

	username := os.Getenv("MQTT_USERNAME")
	if username == "" {
		logger.Warn("MQTT_USERNAME is not set")
	}

	password := os.Getenv("MQTT_PASSWORD")
	if password == "" {
		logger.Warn("MQTT_PASSWORD is not set")
	}

	topicsEnv := os.Getenv("MQTT_TOPICS")
	var topics []string
	if topicsEnv == "" {
		logger.Warn("MQTT_TOPICS is not set, defaulting to #")
		topics = []string{"#"}
	} else {
		parts := strings.Split(topicsEnv, ",")
		for _, p := range parts {
			t := strings.TrimSpace(p)
			if t != "" {
				topics = append(topics, t)
			}
		}
	}

	return &Config{
		URI:      uri,
		Username: username,
		Password: password,
		Topics:   topics,
	}
}