import { generate_keypair } from "../crypto/main.js";
import { Random } from "./random.js";
import { Barrier } from "./barrier.js";
import { Packet } from "./packet.js";
import { updateDom } from "./dom.js";

export const ID = window.crypto.randomUUID();
export let us = null;

export const game = new Game();

export let socket;
let random;
let barrier;
let keys;

// Not totally reliable but better than nothing.
window.addEventListener("beforeunload", () => {
    socket.emit("message", Packet.createDisconnect());
});

document.addEventListener("DOMContentLoaded", () => {
    socket = io();
    random = new Random();
    barrier = new Barrier();
    keys = generate_keypair();

    socket.on("connect", () => {
        window.console.log("Connected!");
        socket.emit("message", Packet.createAnnounce());
        game.addPlayer(ID, name, true);
    });

    socket.on("message", async (data) => {
        // todo validate signature

        switch (data.type) {
            case "RANDOM":
                if (data.author === ID) {
                    return;
                }
                await random.processCooperativeRandom(data);
                break;

            case "BARRIER":
                if (data.author === ID) {
                    return;
                }
                barrier.resolve(data);
                break;

            default:
                const event = new CustomEvent(data.type, { detail: data });
                document.dispatchEvent(event);
                break;
        }
    });
});

/**
 * Process player connect packets: these inform that a new player has joined.
 *
 * @param data Packet received
 */
document.addEventListener("ANNOUNCE", (data) => {
    if (data.author === ID) return;

    let is_new = game.addPlayer(data.author, data.name, false);

    // When a new player is seen, all announce to ensure they know all players.
    if (is_new) {
        socket.emit("message", Packet.createAnnounce());
    }
});

document.addEventListener("DISCONNECT", (data) => {
    game.removePlayer(data.author);
});

/**
 * Process keep-alive packets: these are packets that check players are still online.
 *
 * @param data Packet received
 */
document.addEventListener("KEEPALIVE", (data) => {
    game.keepAlive(data.author);
});

document.addEventListener("ACT", async (data) => {
    if (data.author !== game.currentPlayer().id) {
        if (data.action === "DEFENSE") {
            await game.players[data.author].setDefense(data.amount);
        }

        return;
    }

    if (game.isWaiting()) {
        game.setReady(data.author, data.ready);
    } else if (game.isPregame()) {
        if (!Region.allRegionsClaimed()) {
            // Claim a region in the pregame.
            if (game.currentPlayer().claim(data)) {
                // Increment to next player.
                game.currentPlayer().endTurn();
            }
        } else if (!Region.allReinforcementsPlaced()) {
            if (game.currentPlayer().reinforce(data)) {
                game.currentPlayer().endTurn();
            }
        }

        if (Region.allReinforcementsPlaced()) {
            game.incrementState();
        }
    } else {
        if (await game.currentPlayer().act(data)) {
            game.currentPlayer().endTurn();
        }
    }
});

export async function startPregame() {
    gameState = PRE_GAME;

    let firstPlayerIndex = await random.get(Object.keys(players).length, "first-player");

    let firstPlayer = Object.values(players).sort((a, b) => (a.id < b.id ? -1 : 1))[
        firstPlayerIndex
    ];

    firstPlayer.isPlaying = true;
    await barrier.wait();
    updateDom();
}