package handlers

import (
	"encoding/json"
	"net"
	"net/http"
	"slideshowApp/env"
	"strings"
)

// Helper to get the local network IP address
func getLocalIP() string {
	if env.Host.GetValue() != "0.0.0.0" && env.Host.GetValue() != "localhost" {
		return env.Host.GetValue()
	}

	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return "localhost"
	}
	for _, address := range addrs {
		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				if env.Env.GetValue() == "development" && !strings.Contains(ipnet.IP.String(), "192.168") {
					continue
				}
				return ipnet.IP.String()
			}
		}
	}
	return "localhost"
}

func InfoHandler(w http.ResponseWriter, r *http.Request) {
	port := env.Port.GetValue()
	if port == "" {
		port = "8080"
	}

	speed := env.IntervalDefault.GetValue()
	if speed == "" {
		speed = "10"
	}

	data := map[string]string{
		"ip":    getLocalIP(),
		"port":  port,
		"speed": speed,
	}
	json.NewEncoder(w).Encode(data)
}