import { Server } from "socket.io";
import axios from "axios";
import { handleConnectionEvents } from "./events/connection.js";
import { addUser, removeUser } from "./state/connection.js";
import gameEvents from "./events/game.js";
import matchEvents from "./events/match.js";

export const server = {
    io: null,
};

const API_URL = "http://localhost:8000/api/v1";

const disconnectTimers = new Map();
const RECONNECT_GRACE_PERIOD = 1 * 60 * 1000;

const userId = (socket) => socket.user && socket.user.id;

export const serverStart = (port) => {
    server.io = new Server(port, {
        cors: {
            origin: "*",
        },
    });

    server.io.use(async (socket, next) => {
        let token = socket.handshake.auth.token;

        if (!token) {
            return next(new Error("Authentication error: No token provided"));
        }

        if (!token.startsWith("Bearer ")) {
            token = "Bearer " + token;
        }

        try {
            const response = await axios.get(`${API_URL}/users/me`, {
                headers: {
                    Authorization: token,
                    Accept: "application/json"
                },
            });

            const user = response.data.data || response.data;

            if (!user || !user.id) {
                return next(new Error("Authentication error: User data not found"));
            }

            socket.user = user;
            socket.token = token;
            socket.handshake.auth.token = token;

            if (disconnectTimers.has(user.id)) {
                console.log(`[Connection] User ${user.id} reconnected! Cancelling surrender timer.`);
                clearTimeout(disconnectTimers.get(user.id));
                disconnectTimers.delete(user.id);
            }

            addUser(socket.id, user);

            next();
        } catch (error) {
            if (error.response) {
                console.error(
                    "❌ Erro Laravel:",
                    error.response.status,
                    error.response.data
                );
            } else {
                console.error("❌ Erro Rede:", error.message);
            }
            next(new Error("Authentication error: Invalid token"));
        }
    });

    server.io.on("connection", (socket) => {
        gameEvents(server.io, socket);
        matchEvents(server.io, socket);

        handleConnectionEvents(server.io, socket);

        socket.on("notify_disconnect", () => {
            socket.isVoluntaryDisconnect = true;
        });

        socket.on("disconnect", () => {
            removeUser(socket.id);

            if (socket.isVoluntaryDisconnect) {
                console.log(`[Disconnect] User ${userId} disconnected voluntarily. No surrender needed.`);
                return;
            }

            if (userId) {
                console.log(`[Disconnect] User ${userId} disconnected. Waiting ${RECONNECT_GRACE_PERIOD / 1000}s...`);
                const timer = setTimeout(async () => {
                    console.log(`[Timeout] User ${userId} did not return. Forcing surrender.`);

                    const gameId = socket.activeGameId;

                    if (gameId) {
                        try {
                            await axios.post(`${API_URL}/games/${gameId}/resign`, {}, {
                                headers: {
                                    Authorization: socket.handshake.auth.token,
                                    Accept: "application/json"
                                }
                            });

                            server.io.to(gameId).emit("game_over", {
                                winner: "opponent",
                                reason: "disconnect"
                            });

                            console.log(`[Timeout] Successfully resigned game ${gameId} for user ${userId}`);
                        } catch (err) {
                            console.error(`[Timeout] Failed to resign game for user ${userId}:`, err.message);
                        }
                    }

                    disconnectTimers.delete(userId);
                }, RECONNECT_GRACE_PERIOD);

                disconnectTimers.set(userId, timer);
            }
        });
    });
};