//===== Constructor
const Controls = function() {
    this.names = {};
//     this.starts = [];
//     this.timers = {};

//     // "Local" and "Global" messages
//     document.addEventListener('L-connected', this.msgConnected.bind(this));
    document.addEventListener('L-stack', this.msgStack.bind(this));
//     document.addEventListener('L-reset', this.msgReset.bind(this));
//     document.addEventListener('L-undo', this.msgUndo.bind(this));

//     document.addEventListener('G-guess', this.msgGuess.bind(this)); 
    document.addEventListener('G-countdown', this.msgCountdown.bind(this)); 
    document.addEventListener('G-players', this.msgPlayers.bind(this)); 
    document.addEventListener('G-skip', this.msgSkip.bind(this));
    document.addEventListener('G-start', this.msgStart.bind(this));
    document.addEventListener('G-stop', this.msgStop.bind(this));
 
    // Click handlers
    document.getElementById('controls-reset').addEventListener('click', this.onClickReset.bind(this));
    document.getElementById('controls-robots').addEventListener('click', this.onClickRobots.bind(this));
    document.getElementById('controls-skip').addEventListener('click', this.onClickSkip.bind(this));
    document.getElementById('controls-start').addEventListener('click', this.onClickStart.bind(this));
    document.getElementById('controls-stop').addEventListener('click', this.onClickStop.bind(this));
    document.getElementById('controls-submit').addEventListener('click', this.onClickSubmit.bind(this));
    document.getElementById('controls-undo').addEventListener('click', this.onClickUndo.bind(this));
    document.getElementById('controls-walls').addEventListener('click', this.onClickWalls.bind(this));
}

//===== Countdown

// Controls.prototype.countdownStart = function(seconds) {
//     clearTimeout(this.timers.countdown);
//     this.timers.countdown = this.countdownTick.bind(this);

//     const countdown = document.getElementById('controls-countdown');
//     countdown.dataset.tick = seconds;

//     this.countdownTick();
// };

// Controls.prototype.countdownTick = function() {
//     const countdown = document.getElementById('controls-countdown');
//     const tick = countdown.dataset.tick * 1;
//     countdown.dataset.tick = tick - 1; 

//     const s = (tick !== 1) ? 's' : '';
//     countdown.innerHTML = `${tick} second${s}!`;

//     if (tick === 0) {
//         this.countdownComplete();
//         return;
//     }

//     this.timers.countdown = setTimeout(this.countdownTick.bind(this), 1000);
// };

// Controls.prototype.countdownComplete = function() {
//     document.getElementById('controls-countdown').dataset.tick = 0;   
// };

//===== UI
// Controls.prototype.showWaiting = function() {
//     document.getElementById('controls-start').parentNode.style.display = '';
//     document.getElementById('controls-walls').parentNode.style.display = '';
//     document.getElementById('controls-robots').parentNode.style.display = '';

//     document.getElementById('controls-stop').parentNode.style.display = 'none';
//     // document.getElementById('controls-moves-reset').parentNode.style.display = 'none';
//     document.getElementById('controls-guesses').style.display = 'none';
//     document.getElementById('controls-panic').style.display = 'none';
// };

// Controls.prototype.showPanic = function() {
//     this.showGuessing();
//     document.getElementById('controls-panic').style.display = '';
// };

//===== Message handlers

Controls.prototype.msgCountdown = function(evt) {
    // this.showWaiting();
    console.error(evt);
    alert("COUNTDOWN RECEIVED");
};

Controls.prototype.msgStack = function(evt) {
    const robots = evt.detail.reduce((acc, { id }) => acc.has(id) ? acc : acc.add(id), new Set());
    const moveCount = evt.detail.length - robots.size;

    document.getElementById('controls-moves').innerHTML = moveCount;
    document.getElementById('controls-undo').style.display = moveCount > 0 ? 'block' : 'none';
};

Controls.prototype.msgPlayers = function(evt) {
    const container = document.getElementById('controls-players');
    const names = evt.detail.body;
    const keys = Object.keys(names);

    if (keys.length > 0) {
        const nobody = document.getElementById('controls-players-nobody');
        nobody && nobody.parentNode.removeChild(nobody);
    }
    
    keys.forEach(connectionId => {
        const id = `player-${connectionId}`;

        if (document.getElementById(id)) {
            return;
        }

        const n = document.createElement('div');
        n.id = id;
        n.innerHTML = names[connectionId];
        n.className = 'controls-player';
        container.appendChild(n)
    });

    this.names = names;

    container.querySelectorAll('.controls-player').forEach(el => {
        const id = el.id.split('player-').pop();
        if (!this.names[id]) {
            container.removeChild(el);
        }
    });
};

Controls.prototype.msgSkip = function() {
    // this.coundownComplete();
};

Controls.prototype.msgStart = function() {
    //
};

Controls.prototype.msgStop = function() {
    // 
}

//===== Click handlers

Controls.prototype.dispatch = function(evt, data) {
    const e = (data ? new CustomEvent(evt, { detail: data }) : new Event(evt));
    document.dispatchEvent(e);
};

Controls.prototype.onClickReset = function() {
    this.dispatch('L-reset');
};

Controls.prototype.onClickRobots = function() {
    this.dispatch('L-robots');
};

Controls.prototype.onClickSkip = function() {
    this.dispatch('L-skip');
};

Controls.prototype.onClickStart = function() {
    this.dispatch('L-start');
};

Controls.prototype.onClickStop = function() {
    this.dispatch('L-stop');
};

Controls.prototype.onClickSubmit = function() {
    this.dispatch('L-submit');
};

Controls.prototype.onClickUndo = function() {
    this.dispatch('L-undo');
};

Controls.prototype.onClickWalls = function() {
    this.dispatch('L-walls');
};

//===== THE TRASH BIN OF HISTORY
// Controls.prototype.msgRobots = function(evt) {
//     this.starts = [];
//     this.moves = [];

//     evt.detail.body.forEach(({ id, i, j}) => {
//         this.starts.push({ id, i, j });
//         this.moves.push({ id, i, j });
//     });
// };

// Controls.prototype.msgGuess = function(evt) { 
//     const blurbs = [ " has a solution: ", " can do it in ", " says, maybe ", " wagers ", 
//         " reckons ", " is pretty sure it's ", ", confidently: ", " wants it to be ", 
//         " says ", " hazards ", " guesses ", " thinks it might be "];
//     const blurb = blurbs[Math.floor(Math.random() * blurbs.length)];

//     const msg = evt.detail;
//     const guess = msg.guess;

//     this.currentWinningGuess = guess;

//     document.getElementById('controls-panic').querySelector('.controls-alert-urgent').innerHTML = (`${this.names[msg.id]}${blurb}${guess} moves.`);
//     this.showPanic();
//     this.countdownStart(5);
// }

// Controls.prototype.msgReset = function() {
//     // Broadcast starting locations.
//     this.moves = [];
//     this.starts.forEach(move => {
//         const evtMove = new CustomEvent('L-move', { detail: move });
//         document.dispatchEvent(evtMove);
//     });
// };

// Controls.prototype.msgUndo = function(evt) {
//     if (this.moves.length <= this.starts.length) {
//         return;
//     }

//     const { id } = this.moves.pop(); 

//     const indexOfPreviousMove = this.moves.reduce((acc, v, i) => (v.id === id ? i : acc), -1);
//     const previousMove = this.moves.splice(indexOfPreviousMove, 1);

//     const evtMove = new CustomEvent('L-move', { detail: previousMove[0] });
//     document.dispatchEvent(evtMove);
// };

// Controls.prototype.msgAttempt = function() {
//     alert("Ready for winning attempt!");
// };