package handlers

import (
	"encoding/json"
	"net/http"
	"strconv"
	"tailly_back_v2/internal/domain"
	"tailly_back_v2/internal/service"
	"tailly_back_v2/internal/ws"

	"github.com/go-chi/chi/v5"
	"github.com/gorilla/websocket"
)

type ChatHandler struct {
	chatService service.ChatService
	hub         *ws.ChatHub
}

var upgrader = websocket.Upgrader{
	CheckOrigin: func(r *http.Request) bool {
		return true // В production заменить на проверку origin
	},
}

func (h *ChatHandler) WebSocketConnection(w http.ResponseWriter, r *http.Request) {
	userID, err := strconv.Atoi(chi.URLParam(r, "userID"))
	if err != nil {
		http.Error(w, "Invalid user ID", http.StatusBadRequest)
		return
	}

	conn, err := upgrader.Upgrade(w, r, nil)
	if err != nil {
		http.Error(w, "Could not open websocket connection", http.StatusBadRequest)
		return
	}

	client := &ws.Client{
		UserID: userID,
		Send:   make(chan *domain.Message, 256),
	}

	h.hub.Register(client)

	// Горутина для чтения сообщений
	go h.readPump(conn, client)
	// Горутина для записи сообщений
	go h.writePump(conn, client)
}

func (h *ChatHandler) readPump(conn *websocket.Conn, client *ws.Client) {
	defer func() {
		h.hub.Unregister(client)
		conn.Close()
	}()

	for {
		_, message, err := conn.ReadMessage()
		if err != nil {
			break
		}
		// Обработка входящих сообщений (если нужно)
	}
}

func (h *ChatHandler) writePump(conn *websocket.Conn, client *ws.Client) {
	defer conn.Close()
	for {
		message, ok := <-client.Send
		if !ok {
			conn.WriteMessage(websocket.CloseMessage, []byte{})
			return
		}

		if err := conn.WriteJSON(message); err != nil {
			return
		}
	}
}