package handlers

import (
	"log"
	"net/http"
	"net/url"

	"github.com/gin-gonic/gin"
	"github.com/gorilla/websocket"
	"github.com/nemunaire/repeater/internal/logging"
)

var upgrader = websocket.Upgrader{
	CheckOrigin: checkSameOrigin,
}

// checkSameOrigin only accepts WebSocket upgrades whose Origin header matches
// the request's Host. Without this, any web page a LAN user visits could open
// a WebSocket against the router's API.
func checkSameOrigin(r *http.Request) bool {
	origin := r.Header.Get("Origin")
	if origin == "" {
		// Non-browser clients (curl, native apps) do not send Origin.
		return true
	}
	u, err := url.Parse(origin)
	if err != nil {
		return false
	}
	return u.Host == r.Host
}

// WebSocketLogs handles WebSocket connections for real-time logs
func WebSocketLogs(c *gin.Context) {
	conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
	if err != nil {
		log.Printf("Erreur WebSocket: %v", err)
		return
	}
	defer conn.Close()

	// Register client
	logging.RegisterWebSocketClient(conn)
	defer logging.UnregisterWebSocketClient(conn)

	// Keep connection alive
	for {
		_, _, err := conn.ReadMessage()
		if err != nil {
			break
		}
	}
}