2048.html
author Oleksandr Gavenko <gavenkoa@gmail.com>
Sat, 17 Mar 2018 16:18:59 +0200
changeset 193 6d35f7e53b7c
parent 190 d1b12b602915
permissions -rw-r--r--
Fixed typo.

<!DOCTYPE html>
<html>
<head>
  <title>2048 AI</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <meta charset="utf-8"/>

  <script src="rule.js"></script>
  <script src="board.js"></script>
  <script src="perf.js"></script>
  <script src="ai.js"></script>

  <link rel="stylesheet" type="text/css" href="rst.css">

  <style>
    body {
      font-size: 11pt;
    }
    h1, div.area {
      text-align: center;
      margin: 10px auto;
    }
    #board {
      margin: 10px auto;
    }
    #board td {
      width: 40px;
      height: 40px;
      border: 1px solid red;
      margin: 0;
      text-align: center;
    }
    div.control {
      text-align: left;
      border: 1px red solid;
      display: inline-block;
      margin: 3px 2px;
      background-color: cornsilk;
      padding: 2px;
    }
    div.move.control button.suggestion {
      background-color: cyan;
    }
    div.wide.control {
      display: block;
    }
    div.ai.control {
      position: relative;
      margin-bottom: 1em;
    }
    div.ai.control.enabled {
      background-color: wheat;
    }
    div.control h5 {
      text-align: center;
      margin: 2px 0;
    }
    div.ai.control h5 {
      margin-left: 6em;
    }
    button.ai {
      position: absolute;
      left: 1em;
      top: -1em;
    }
    button#statistic, button#statistic-clean {
      display: inline-block;
      margin: 3px 4px;
    }
    div.control > div.option {
      display: inline-block;
      margin: 1px 4px;
      padding: 2px;
      border: 1px solid tan;
      border-radius: 4px;
    }
    div.control input {
      text-align: right;
      max-width: 4em;
      margin-right: 2px;
    }
    #test {
      display: none;
    }
    table.report-by-maxval {
      border-collapse: collapse;
      margin: 2px;
      font-size: 10pt;
      text-align: right;
    }
    table.report-by-maxval > tr > th {
      border: 2px solid green;
      padding: 2px;
    }
    table.report-by-maxval > tr > td {
      border: 1px solid green;
      padding: 2px;
    }
    table.report-by-maxval > tr > td:nth-child(3) {
      background-color: gold;
    }
    table.report-by-maxval > tr > td:nth-child(5),
    table.report-by-maxval > tr > td:nth-child(8),
    table.report-by-maxval > tr > td:nth-child(11) {
      background-color: wheat;
    }
  </style>
</head>
<body>

  <div class="area">[ <a href="README.html">About</a> | <a href="CHANGES.html">Changes</a> | <a href="AIs.html">AIs</a> | <a href="HACKING.html">Hacking</a> | <a href="AUTHORS.html">Authors</a> ]</div>

  <h1>2048</h1>

  <div id="score-area" class="area">
    <div class="control">
      Score: <span id="score">0</span>, Max: <span id="max">0</span>, Turn: <span id="turn">0</span>, Speed: <span id="speed">0</span> t/s
    </div>
  </div>

  <div id="message-area" class="area"></div>

  <table id="board">
    <tr>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>
    <tr>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>
  </table>

  <div id="control-area" class="area">
    <div class="control">
      <button id="reset">Reset</button>
      <div class="option"><input type="checkbox" id="2048" checked> 2048</div>
      <div class="option">
        <select id="board-engine">
          <option value="BoardObj">BoardObj</option>
          <option value="BoardArr2d">BoardArr2d</option>
          <option value="BoardArr">BoardArr</option>
        </select> engine
      </div>
    </div>
    <br>
    <div class="control">
      <button id="suggest">Suggest</button>
      <button id="step">Step</button>
      <button id="visual-finish">Visual</button>
      <button id="finish">Finish</button>
      <div class="option"><input type="checkbox" id="profile"> profile</div>
    </div>
    <br>
    <div class="control">
      <button id="until">Continue</button>
      <div class="option">until <input type="text" class="positive" id="until-score" value="10000"> score</div>
      and <div class="option"><input type="text" class="positive" id="until-max-value" value="9"> max value</div>
    </div>
    <br>
    <div class="move control">
      <table>
        <tr>
          <td></td><td><button id="up">↑</button></td><td></td>
        </tr>
        <tr>
          <td><button id="left">←</button></td><td><button id="down">↓</button></td><td><button id="right">→</button></td>
        </tr>
      </table>
      <button id="test">test</button>
    </div>
    <h1>AIs</h1>
    <div class="ai-list">
      <div class="ai wide control" id="ai-blind-random">
        <button class="ai">enable</button>
        <h5>bling random</h5>
      </div>
      <div class="ai wide control" id="ai-always-up">
        <button class="ai">enable</button>
        <h5>always up</h5>
      </div>
      <div class="ai wide control" id="ai-blind-weight-random">
        <button class="ai">enable</button>
        <h5>bling weight random</h5>
        <div class="option">
          <input type="text" name="left" class="positive" pattern="[0-9]*[.]?[0-9]*" value="1"/> left weight
        </div>
        <div class="option">
          <input type="text" name="right" class="positive" pattern="[0-9]*[.]?[0-9]*" value="16"/> right weight
        </div>
        <div class="option">
          <input type="text" name="up" class="positive" pattern="[0-9]*[.]?[0-9]*" value="4"/> up weight
        </div>
        <div class="option">
          <input type="text" name="down" class="positive" pattern="[0-9]*[.]?[0-9]*" value="8"/> down weight
        </div>
      </div>
      <div class="ai wide control" id="ai-blind-cycle">
        <button class="ai">enable</button>
        <h5>blind cycle</h5>
        <div class="option">
          <input type="checkbox" name="clockwise"/> clockwise
        </div>
        <div class="option">
          <input type="checkbox" name="whilePossible"/> max move in one direction
        </div>
      </div>
      <div class="ai wide control" id="ai-one-step-ahead">
        <button class="ai">enable</button>
        <h5>one step ahead</h5>
        <div class="option">
          <input type="text" name="scoreCoef" class="positive" pattern="[0-9]*[.]?[0-9]*" value="1"/> score weight
        </div>
        <div class="option">
          <input type="text" name="maxValCoef" class="positive" pattern="[0-9]*[.]?[0-9]*" value="0"/> max value weight
        </div>
        <div class="option">
          <input type="text" name="cornerBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="100"/> max value at corner bonus
        </div>
        <div class="option">
          <input type="text" name="edgeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="0"/> max value at edge bonus
        </div>
        <div class="option">
          <input type="text" name="freeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="10"/> free cell coefficient
        </div>
      </div>
      <div class="ai wide control" id="ai-static-deep-merges">
        <button class="ai">enable</button>
        <h5>deep merges without random simulation</h5>
        <div class="option">
          <input type="text" name="scoreCoef" class="positive" pattern="[0-9]*[.]?[0-9]*" value="1"/> score weight
        </div>
        <div class="option">
          <input type="text" name="maxValCoef" class="positive" pattern="[0-9]*[.]?[0-9]*" value="0"/> max value weight
        </div>
        <div class="option">
          <input type="text" name="cornerBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="100"/> max value at corner bonus
        </div>
        <div class="option">
          <input type="text" name="edgeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="0"/> max value at edge bonus
        </div>
        <div class="option">
          <input type="text" name="freeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="10"/> free cell coefficient
        </div>
        <div class="option">
          <input type="text" name="utilityThreshold" class="positive" pattern="[0-9]*[.]?[0-9]*" value="10"/> score threshold
        </div>
      </div>
      <div class="ai wide control" id="ai-expectimax">
        <button class="ai">enable</button>
        <h5>expectimax</h5>
        <div class="option">
          <input type="text" name="depth" class="positive" pattern="[0-9]*" value="3"/> recursion depth
        </div>
        <div class="option">
          <input type="text" name="balance" class="positive" pattern="[0-9]*[.]?[0-9]*" value=".9"/> probability of 2
        </div>
        <div class="option">
          <input type="text" name="scoreCoef" class="positive" pattern="[0-9]*[.]?[0-9]*" value="1"/> score weight
        </div>
        <div class="option">
          <input type="text" name="maxValCoef" class="positive" pattern="[0-9]*[.]?[0-9]*" value="0"/> max value weight
        </div>
        <div class="option">
          <input type="text" name="cornerBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="100"/> max value at corner bonus
        </div>
        <div class="option">
          <input type="text" name="edgeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="0"/> max value at edge bonus
        </div>
        <div class="option">
          <input type="text" name="freeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value="10"/> free cell coefficient
        </div>
      </div>
      <div class="ai wide control" id="ai-survive">
        <button class="ai">enable</button>
        <h5>survive</h5>
        <div class="option">
          <input type="text" name="maxDepth" class="positive" pattern="[0-9]*" value="5"/> depth
        </div>
        <div class="option">
          <input type="text" name="freeCells" class="positive" pattern="[1-9][0-9]?" value="8"/> free cells
        </div>
      </div>
      <div class="ai wide control" id="ai-monte-carlo">
        <button class="ai">enable</button>
        <h5>Monte Carlo</h5>
        <div class="option">
          <input type="text" name="maxDepth" class="positive" pattern="[0-9]*" value="4"/> depth limit
        </div>
        <div class="option">
          <input type="text" name="simulations" class="positive" pattern="[0-9]*" value="30"/> simulations
        </div>
        <div class="option">
          <input type="text" name="cornerBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value=".2"/> max value at corner bonus
        </div>
        <div class="option">
          <input type="text" name="edgeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value=".1"/> max value at edge bonus
        </div>
        <div class="option">
          <input type="text" name="freeBonus" class="positive" pattern="[0-9]*[.]?[0-9]*" value=".2"/> free cell coefficient
        </div>
      </div>
    </div>
  </div>

  <div id="report-area" class="area">
    <h1>Reports</h1>
    <div class="control">
      <div class="option">up to <input type="text" id="stat-count-limit" value="100"> times</div>
      <div class="option">up to <input type="text" id="stat-time-limit" value="10"> sec</div>
      <button id="statistic-start">Start</button>
      <button id="statistic-stop">Stop</button>
      <button id="statistic-clean">Clean</button>
      <div class="option"><input type="checkbox" id="report-score"/> score</div>
      <div class="option"><input type="checkbox" id="report-turn"/> turn</div>
      <div class="option"><input type="checkbox" id="report-speed"/> speed</div>
    </div>
    <div id="reports" class="wide control"></div>
  </div>

  <script>
    "use strict";

    var ui = {};

    ////////////////////////////////////////////////////////////////
    // UI widgets.

    ui.dom = {};
    ui.dom.putBr = function(parentDom, text) {
      var lines = text.split('\n');
      parentDom.appendChild(document.createTextNode(lines[0]));
      for (var i = 1; i < lines.length; i++) {
        parentDom.appendChild(document.createElement('br'));
        parentDom.appendChild(document.createTextNode(lines[i]));
      }
    }
    ui.dom.table = function(tbl, cols, cfg) {
      var tableDom = document.createElement('table');
      if (typeof cfg.tblClass === 'string')
        tableDom.classList.add(cfg.tblClass);
      if (typeof cfg.tblTitle === 'string')
        tableDom.title = cfg.tblTitle;
      var trDom = document.createElement('tr');
      for (var i = 0; i < cols.length; i++) {
        var thDom = document.createElement('td');
        ui.dom.putBr(thDom, cols[i]);
        trDom.appendChild(thDom);
      }
      tableDom.appendChild(trDom);
      for (var i = 0; i < tbl.length; i++) {
        var row = tbl[i];
        var trDom = document.createElement('tr');
        for (var j = 0; j < row.length; j++) {
          var tdDom = document.createElement('td');
          tdDom.appendChild(document.createTextNode(row[j]));
          trDom.appendChild(tdDom);
        }
        tableDom.appendChild(trDom);
      }
      return tableDom;
    };

    ////////////////////////////////////////////////////////////////
    // Board.

    var boardDom = document.getElementById("board");
    ui.board = {};
    ui.board.val2048Dom = document.getElementById('2048');
    ui.board.val2048Dom.addEventListener("click", function(event) {
      event.stopPropagation();
      ui.board.update(ui.board.position);
      localStorage.val2048 = ui.board.val2048Dom.checked;
      event.target.blur();
    }, false);
    ui.board.val2048 = function(val) {
      if (ui.board.val2048Dom.checked)
        return Math.pow(2, val);
      return val;
    }
    var boardEngineDom = document.getElementById("board-engine");
    boardEngineDom.addEventListener("change", function() {
      var engine = boardEngineDom.value;
      ui.brdEngine = window[engine];
      localStorage.brdEngine = engine;
    });
    /* 'val' typesafe.  */
    ui.board.set = function(i, j, val) {
      if (typeof val !== 'number')
        val = 0;
      var dom = boardDom.querySelectorAll("tr")[i].querySelectorAll("td")[j];
      if (0 < val && val < 15) {
        dom.innerHTML = ui.board.val2048(val);
        var rgb = 'rgb(255,'+ (255-5*val-2*(val%2)) +','+ (255-10*val-5*((val-1)%2)) +')';
      } else {
        dom.innerHTML = '';
        var rgb = 'white';
      }
      dom.style.backgroundColor = rgb;
    }
    ui.board.update = function(brd) {
      for (var i = 0; i < 4; i++) {
        for (var j = 0; j < 4; j++) {
          ui.board.set(i, j, brd[i][j]);
        }
      }
    }
    ui.board.handleEdit = function(tdDom, i, j) {
      if (!tdDom.firstChild || tdDom.firstChild.nodeType === Node.TEXT_NODE) {
        if (tdDom.firstChild)
          tdDom.removeChild(tdDom.firstChild);
        var inputDom = document.createElement('input');
        inputDom.value = ui.board.position[i][j];
        inputDom.style.width = '1em';
        tdDom.appendChild(inputDom);
        inputDom.focus();
        inputDom.select();
        inputDom.addEventListener("blur", function(tdDom, i, j) {
          return function(event) {
            event.preventDefault(); event.stopPropagation();
            ui.board.handleEdit(tdDom, i, j);
          }
        }(tdDom, i, j), false);
      } else {
        var inputDom = tdDom.firstChild;
        var val = parseInt(inputDom.value);
        if (0 <= val && val < 15) {
          ui.board.position[i][j] = val;
          ui.board.set(i, j, val);
        } else {
          ui.board.set(i, j, ui.board.position[i][j]);
        }
      }
    }
    ui.board.enableEdit = function() {
      var trDoms = boardDom.querySelectorAll("tr");
      for (var i = 0; i < 4; i++) {
        var tdDoms = trDoms[i].querySelectorAll("td");
        for (var j = 0; j < 4; j++) {
          var tdDom = tdDoms[j];
          tdDom.addEventListener("click", function(tdDom, i, j) {
            return function(event) {
              event.preventDefault(); event.stopPropagation();
              ui.board.handleEdit(tdDom, i, j);
            }
          }(tdDom, i, j), false);
          tdDom.addEventListener("keyup", function(tdDom, i, j) {
            return function(event) {
              event.preventDefault(); event.stopPropagation();
              if (event.keyCode === 13)
                ui.board.handleEdit(tdDom, i, j);
            }
          }(tdDom, i, j), false);
        }
      }
    }
    ui.board.enableEdit();

    ////////////////////////////////////////////////////////////////
    // Score statistic.

    ui.score = {};
    var scoreDom = document.getElementById("score");
    var maxDom = document.getElementById("max");
    var speedDom = document.getElementById("speed");
    var turnDom = document.getElementById("turn");
    ui.score.clear = function(brd) {
      scoreDom.innerHTML = '0';
      maxDom.innerHTML = '0';
      speedDom.innerHTML = '0';
      turnDom.innerHTML = '0';
    }
    ui.score.update = function(brd, turn) {
      var score = board.score(brd);
      scoreDom.innerHTML = '' + score.score;
      maxDom.innerHTML = '' + ui.board.val2048(score.max);
      turnDom.innerHTML = '' + turn;
    }
    ui.score.speed = function(speed) {
      speedDom.innerHTML = '' + speed;
    }

    ////////////////////////////////////////////////////////////////
    // Suggestion UI.

    ui.suggestion = {};
    ui.suggestion.btns = document.querySelectorAll('div.move.control button');
    ui.suggestion.clear = function() {
      for (var i = 0; i < ui.suggestion.btns.length; i++)
        ui.suggestion.btns[i].classList.remove('suggestion');
    }
    ui.suggestion.set = function(dir) {
      document.getElementById(dir).classList.add('suggestion');
    }

    ////////////////////////////////////////////////////////////////
    // Game flow.

    ui.game = {};
    ui.game.dirs = ["up", "right", "down", "left"];

    var messageDom = document.getElementById("message-area");
    ui.game.clearMessage = function() {
      messageDom.innerHTML = "";
    }
    ui.game.setMessage = function(msg) {
      messageDom.innerHTML = msg;
    }

    ui.game.checkGameOver = function() {
      if (board.gameOver(ui.board.position)) {
        ui.game.setMessage("Game over!");
        return true;
      } else {
        return false;
      }
    }
    ui.game.checkMoveValid = function(move) {
      var tmpBrd = board.create();
      board.copy(ui.board.position, tmpBrd);
      if (ui.game.dirs.indexOf(move) === -1) {
        ui.game.setMessage("AI can't find move!");
        return false;
      }
      if ( ! board.move[move].call(null, tmpBrd)) {
        ui.game.setMessage("AI move '"+move+"' is ivalid!");
        return false;
      }
      return true;
    }

    ui.game.prepareStep = function() {
      ui.suggestion.clear();
      ui.game.clearMessage();
      if (ui.game.checkGameOver())
        return false;
      return true;
    }
    ui.game.refresh = function() {
      ui.board.update(ui.board.position);
      ui.score.update(ui.board.position, ui.board.turn);
      localStorage.savedBoard = JSON.stringify(ui.board.position);
      localStorage.savedTurn = ui.board.turn;
    }
    ui.game.finishStep = function() {
      board.putRandom(ui.board.position);
      ui.board.turn++;
      ui.game.refresh();
    }

    ////////////////////////////////////////////////////////////////
    // Actions.

    ui.action = {};

    ui.action.reset = function() {
      ui.score.clear();
      ui.suggestion.clear();
      ui.game.clearMessage();
      ui.board.turn = 0;
      ui.board.position = board.create();
      board.putRandom(ui.board.position);
      ui.board.update(ui.board.position);
    }
    document.getElementById("reset").addEventListener("click", ui.action.reset, false);

    for (var i = 0; i < ui.game.dirs.length; i++) {
      var dir = ui.game.dirs[i];
      ui.action[dir] = function(dir) {
        return function(event) {
          event.preventDefault(); event.stopPropagation();
          if (ui.game.checkGameOver())
            return;
          ui.suggestion.clear();
          var updated = board.move[dir](ui.board.position);
          if (updated) {
            ui.game.finishStep();
            ui.ai.current && ui.ai.current.cleanup();
          }
        }
      } (dir);
      document.getElementById(dir).addEventListener("click", ui.action[dir], false);
    }

    document.body.addEventListener("keydown", function(event) {
      if (document.activeElement.value)
        return;
      if (event.altKey || event.ctrlKey || event.shiftKey || event.metaKey)
        return;
      var key = event.keyCode || event.which;
      var keyMoves = {38: "up", 40: "down", 37: "left", 39: "right"};
      if (key in keyMoves) {
        ui.action[keyMoves[key]](event);
      }
    }, false);

    ui.swipe = {startX: 0, startY: 0, endX: 0, endY: 0};
    ui.swipe.direction = function(x, y) {
      var sensitivityThreshold = boardDom.width * boardDom.height / 10;
      if (x*x + y*y < sensitivityThreshold)
        return null;
      if (Math.abs(x) < Math.abs(y)) {
        if (y > 0)
          return "down";
        else
          return "up";
      } else {
        if (x > 0)
          return "right";
        else
          return "left";
      }
    }
    boardDom.addEventListener("touchstart", function(ev) {
      ui.swipe.startX = ev.touches[0].pageX;
      ui.swipe.startY = ev.touches[0].pageY;
      ev.preventDefault();
    }, false);
    boardDom.addEventListener("touchmove", function(ev) {
      ui.swipe.endX = ev.touches[0].pageX;
      ui.swipe.endY = ev.touches[0].pageY;
      ev.preventDefault();
    }, false);
    boardDom.addEventListener("touchend", function(ev) {
      var dir = ui.swipe.direction(ui.swipe.endX - ui.swipe.startX, ui.swipe.endY - ui.swipe.startY);
      if (dir) {
        ui.action[dir](event);
        ev.preventDefault();
      }
    }, false);

    document.getElementById("test").addEventListener("click", function() {
      event.preventDefault(); event.stopPropagation();
      board.move.replaceByBoardJS(ui.brdEngine);
    }, false);

    ui.action.suggest = function(event) {
      event.preventDefault(); event.stopPropagation();
      if ( ! ui.ai.current) {
        ui.game.setMessage('Select AI!');
        return;
      }
      if ( ! ui.game.prepareStep())
        return;
      var tmpBrd = board.create();
      board.copy(ui.board.position, tmpBrd);
      var move = ui.ai.current.analyse(tmpBrd);
      ui.ai.current.cleanup();
      if ( ! ui.game.checkMoveValid(move))
        return;
      ui.suggestion.set(move);
    }
    document.getElementById("suggest").addEventListener("click", ui.action.suggest, false);
    ui.action.step = function() {
      if ( ! ui.ai.current) {
        ui.game.setMessage('Select AI!');
        return;
      }
      if ( ! ui.game.prepareStep())
        return;
      var tmpBrd = board.create();
      board.copy(ui.board.position, tmpBrd);
      var move = ui.ai.current.analyse(tmpBrd);
      ui.ai.current.cleanup();
      if ( ! ui.game.checkMoveValid(move))
        return;
      board.move[move].call(null, ui.board.position);
      ui.game.finishStep();
    }
    document.getElementById("step").addEventListener("click", ui.action.step, false);

    ui.action.visualFinishAux = function() {
      if ( ! ui.game.prepareStep())
        return;
      var brd = board.create();
      board.copy(ui.board.position, brd);
      var move = ui.ai.current.analyse(brd);
      if ( ! ui.game.checkMoveValid(move))
        return;
      board.move[move].call(null, ui.board.position);
      ui.game.finishStep();
      setTimeout(ui.action.visualFinishAux, 10);
    }
    ui.action.visualFinish = function() {
      if ( ! ui.ai.current) {
        ui.game.setMessage('Select AI!');
        return;
      }
      ui.action.visualFinishAux();
    };
    document.getElementById("visual-finish").addEventListener("click", ui.action.visualFinish, false);

    ui.action.finish = function() {
      var isProfile = document.getElementById("profile").checked;
      if (isProfile)
        console.profile();
      if ( ! ui.ai.current) {
        ui.game.setMessage('Select AI!');
        return;
      }
      ui.game.prepareStep();
      var step = 0;
      var safeBdr = board.create();
      var tsFrom = new Date().getTime();
      while (!board.gameOver(ui.board.position)) {
        board.copy(ui.board.position, safeBdr);
        var move = ui.ai.current.analyse(safeBdr);
        if (typeof move === 'undefined') {
          ui.game.setMessage("I don't know how to move!");
          return;
        }
        var updated = board.move[move].call(null, ui.board.position);
        if (updated) {
          board.putRandom(ui.board.position);
        } else {
          ui.board.turn += step;
          ui.game.refresh();
          ui.game.setMessage("Wrong move!");
          return;
        }
        step++; 
      }
      var tsTo = new Date().getTime();
      ui.board.turn += step;
      ui.game.refresh();
      ui.score.speed(parseFloat((step*1000.0/(tsTo-tsFrom)).toPrecision(3)));
      ui.game.setMessage("Game over!");
      ui.ai.current.cleanup();
      if (isProfile)
        console.profileEnd();
    }
    document.getElementById("finish").addEventListener("click", ui.action.finish, false);

    ui.action.until = function() {
      if ( ! ui.ai.current) {
        ui.game.setMessage('Select AI!');
        return;
      }
      if ( ! ui.game.prepareStep())
        return;
      var step = 0;
      var safeBdr = board.create();
      var tsFrom = new Date().getTime();
      var scoreLimit = parseInt(document.getElementById("until-score").value);
      if (!isFinite(scoreLimit) || scoreLimit < 0) {
        scoreLimit = 1;
        document.getElementById("until-score").value = scoreLimit;
      }
      var maxValLimit = parseInt(document.getElementById("until-max-value").value);
      if (!isFinite(maxValLimit) || maxValLimit < 0 || maxValLimit > 13) {
        maxValLimit = 1;
        document.getElementById("until-max-value").value = maxValLimit;
      }
      localStorage.untilScore = scoreLimit;
      localStorage.untilMaxVal = maxValLimit;
      while (true) {
        if (board.gameOver(ui.board.position)) {
          ui.game.setMessage("Game over!");
          break;
        }
        var stat = board.score(ui.board.position);
        if (stat.score >= scoreLimit && stat.max >= maxValLimit)
          break;
        board.copy(ui.board.position, safeBdr);
        var move = ui.ai.current.analyse(safeBdr);
        if (typeof move === 'undefined') {
          ui.game.setMessage("I don't know how to move!");
          return;
        }
        var updated = board.move[move].call(null, ui.board.position);
        if (updated) {
          board.putRandom(ui.board.position);
        } else {
          ui.game.finishStep();
          ui.game.setMessage("Wrong move!");
          return;
        }
        step++; 
      }
      var tsTo = new Date().getTime();
      ui.board.turn += step;
      ui.game.refresh();
      ui.score.speed(parseFloat((step*1000.0/(tsTo-tsFrom)).toPrecision(3)));
      ui.ai.current.cleanup();
    }
    document.getElementById("until").addEventListener("click", ui.action.until, false);

    ////////////////////////////////////////////////////////////////
    // Register AIs.

    ui.ai = {};
    ui.ai.current = null;
    ui.ai.parseCfg = function(aiDom, cfg) {
      cfg = cfg || {};
      var optDoms = aiDom.querySelectorAll("div.option > input.positive[type='text']");
      for (var i = 0; i < optDoms.length; i++) {
        var val = parseFloat(optDoms[i].value);
        if (val === NaN || val < 0) {
          ui.game.setMessage('' + optDoms[i].name + ' is not a positive number!');
          cfg[optDoms[i].name] = 1;
          continue;
        }
        cfg[optDoms[i].name] = val;
      }
      var optDoms = aiDom.querySelectorAll("div.option > input[type='checkbox']");
      for (var i = 0; i < optDoms.length; i++) {
        cfg[optDoms[i].name] = optDoms[i].checked;
      }
      return cfg;
    }
    ui.ai.cfgTitle = function(aiName) {
      var title = JSON.stringify(ui.ai.parseCfg(document.getElementById(aiName))).replace(":", ": ", "g").replace(",", "\n", "g");
      title = title.substr(1);
      title = title.substr(0, title.length-1);
      return title;
    }

    ui.ai.algList = {
      "ai-blind-random": function() {
        return new ai.BlindRandom(ui.brdEngine);
      },
      "ai-always-up": function() {
        return new ai.AlwaysUp(ui.brdEngine);
      },
      "ai-blind-weight-random": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.BlindWeightRandom(ui.brdEngine, cfg);
      },
      "ai-blind-cycle": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.BlindCycle(ui.brdEngine, cfg);
      },
      "ai-one-step-ahead": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.OneStepAhead(ui.brdEngine, cfg);
      },
      "ai-static-deep-merges": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.StaticDeepMerges(ui.brdEngine, cfg);
      },
      "ai-expectimax": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.expectimax(ui.brdEngine, cfg);
      },
      "ai-survive": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.survive(ui.brdEngine, cfg);
      },
      "ai-monte-carlo": function(aiDom) {
        var cfg = ui.ai.parseCfg(aiDom);
        return new ai.MonteCarlo(ui.brdEngine, cfg);
      },
      // "": function() {
      //   return new ai.(ui.brdEngine);
      // },
    };
    ui.ai.domList = document.querySelectorAll('div.ai-list > div.ai');
    for (var i = 0; i < ui.ai.domList.length; i++) {
      ui.ai.domList[i].querySelectorAll('button.ai')[0].addEventListener("click", function (event) {
        ui.ai.enable(event.target.parentNode);
      }, false);
    }

    ui.ai.moveToTop = function(aiDom) {
      for (var i = 0; i < ui.ai.domList.length; i++) {
        ui.ai.domList[i].classList.remove('enabled');
      }
      var rootDom = aiDom.parentNode;
      rootDom.removeChild(aiDom);
      rootDom.insertBefore(aiDom, rootDom.firstChild);
      aiDom.classList.add('enabled');
    }
    ui.ai.enable = function(aiDom) {
      if (ui.ai.current)
        ui.ai.current.cleanup();
      ui.ai.moveToTop(aiDom);
      ui.ai.current = ui.ai.algList[aiDom.id](aiDom);
      ui.ai.currentName = aiDom.id;
    }


    ////////////////////////////////////////////////////////////////
    // Reports and statistic.

    var reportsDom = document.getElementById('reports');

    ui.report = {};
    ui.report.statNo = 1;

    ui.report.update = function(histo, brd, tsDelta, turn) {
      var stat = board.score(brd);
      var speed = turn * 1000 / tsDelta;
      var score = stat.score;
      var max = stat.max;
      if ( ! histo[max]) {
        var row = histo[max] = { n: 1 };
        row.minScore = score; row.meanScore = score; row.maxScore = score;
        row.minSpeed = speed; row.meanSpeed = speed; row.maxSpeed = speed;
        row.minTurn = turn; row.meanTurn = turn; row.maxTurn = turn;
      } else {
        var row = histo[max];
        row.n++;
        row.minScore = Math.min(row.minScore, score);
        row.meanScore += score;
        row.maxScore = Math.max(row.maxScore, score);
        row.minSpeed = Math.min(row.minSpeed, speed);
        row.meanSpeed += speed;
        row.maxSpeed = Math.max(row.maxSpeed, speed);
        row.minTurn = Math.min(row.minTurn, turn);
        row.meanTurn += turn;
        row.maxTurn = Math.max(row.maxTurn, turn);
      }
    }
    ui.report.fix = function(histo) {
      for (var i in histo) {
        var row = histo[i];
        var n = row.n;
        row.meanScore = row.meanScore / n;
        row.meanTurn = row.meanTurn / n;
        row.meanSpeed = row.meanSpeed / n;
      }
    }
    ui.report.show = function(histo, gameCnt) {
      var scoreChecked = document.getElementById('report-score').checked;
      var turnChecked = document.getElementById('report-turn').checked;
      var speedChecked = document.getElementById('report-speed').checked;
      var reportDom = document.createElement('div');
      reportDom.classList.add('option');
      var h5Dom = document.createElement('h5');
      h5Dom.appendChild(document.createTextNode(ui.ai.currentName + " #" + ui.report.statNo++));
      reportDom.appendChild(h5Dom);
      var maxVals = Object.keys(histo).sort(function(a,b){return a - b});
      var tbl = [];
      for (var i = maxVals.length-1; i >= 0; i--) {
        var maxVal = maxVals[i];
        var row = histo[maxVals[i]];
        var perc = parseFloat((100 * row.n / gameCnt).toPrecision(3));
        var tblRow = [maxVal, row.n, perc];
        if (scoreChecked) {
          tblRow.push(row.minScore);
          var meanScore = parseFloat(row.meanScore.toPrecision(3));
          tblRow.push(meanScore);
          tblRow.push(row.maxScore);
        }
        if (turnChecked) {
          tblRow.push(row.minTurn);
          tblRow.push(Math.floor(row.meanTurn));
          tblRow.push(row.maxTurn);
        }
        if (speedChecked) {
          tblRow.push(parseFloat(row.minSpeed.toPrecision(3)));
          tblRow.push(parseFloat(row.meanSpeed.toPrecision(3)));
          tblRow.push(parseFloat(row.maxSpeed.toPrecision(3)));
        }
        tbl.push(tblRow);
      }
      var tblCols = ['max\nval', 'n', '%'];
      if (scoreChecked) {
        tblCols.push('min\nscore');
        tblCols.push('mean\nscore');
        tblCols.push('max\nscore');
      }
      if (turnChecked) {
        tblCols.push('min\nturn');
        tblCols.push('mean\nturn');
        tblCols.push('max\nturn');
      }
      if (speedChecked) {
        tblCols.push('min\nspeed');
        tblCols.push('mean\nspeed');
        tblCols.push('max\nspeed');
      }
      var tableDom = ui.dom.table(tbl, tblCols, { tblClass: 'report-by-maxval', tblTitle: ui.ai.cfgTitle(ui.ai.currentName) });
      reportDom.appendChild(tableDom);
      reportsDom.insertBefore(reportDom, reportsDom.firstChild);
    }
    ui.report.start = function() {
      ui.report.executed = true;
      var histo = {};
      var gameCntLimit = parseInt(document.getElementById('stat-count-limit').value);
      if (isNaN(gameCntLimit) || !isFinite(gameCntLimit) || gameCntLimit < 1)
        gameCntLimit = 100;
      var tsLimit = parseFloat(document.getElementById('stat-count-limit').value);
      if (isNaN(tsLimit) || !isFinite(tsLimit) || tsLimit < 1 || tsLimit > 60)
        tsLimit = 1000 * 10;
      else
        tsLimit = 1000 * tsLimit;
      var safeBdr = board.create();
      function play() {
        var turn = 0;
        var brd = board.create();
        board.putRandom(brd);
        var tsFrom = new Date().getTime();
        while (!board.gameOver(brd)) {
          board.copy(brd, safeBdr);
          var move = ui.ai.current.analyse(safeBdr);
          if (ui.game.dirs.indexOf(move) < 0) {
            ui.game.setMessage("I don't know how to move!");
            throw Error("AI make illegal move '" + move + "'...");
          }
          var updated = board.move[move].call(null, brd);
          if (!updated) {
            ui.game.setMessage("Wrong move!");
            throw Error("AI make illegal move '" + move + "'...");
          }
          board.putRandom(brd);
          turn++;
        }
        var tsTo = new Date().getTime();
        ui.report.update(histo, brd, tsTo-tsFrom, turn);
      }
      var gameCnt = 0;
      var tsFrom = new Date().getTime(), tsFrame = tsFrom;
      function batch() {
        /* console.profile(); */
        while (gameCnt++ < gameCntLimit && ui.report.executed) {
          play();
          var tsTo = new Date().getTime();
          if (tsTo - tsFrame > 7000) {
            tsFrame = tsTo;
            break;
          }
          if (tsTo - tsFrom >= tsLimit)
            break;
        }
        /* console.profileEnd(); */
        if (tsTo - tsFrom >= tsLimit || gameCnt >= gameCntLimit || ! ui.report.executed) {
          ui.report.fix(histo);
          ui.report.show(histo, gameCnt);
        } else {
          setTimeout(batch, 10);
        }
      }
      batch();
    }
    var statisticStartBtn = document.getElementById("statistic-start");
    statisticStartBtn.addEventListener("click", ui.report.start, false);

    ui.report.stop = function() {
      ui.report.executed = false;
    }
    var statisticStopBtn = document.getElementById("statistic-stop");
    statisticStopBtn.addEventListener("click", ui.report.stop, false);

    ui.report.clean = function() {
      while (reportsDom.hasChildNodes()) {
        reportsDom.removeChild(reportsDom.lastChild);
      }
    }
    var statisticCleanBtn = document.getElementById('statistic-clean');
    statisticCleanBtn.addEventListener("click", ui.report.clean, false);

    ////////////////////////////////////////////////////////////////
    // Initialise game.

    if (localStorage.brdEngine) {
      boardEngineDom.value = localStorage.brdEngine;
      ui.brdEngine = window[localStorage.brdEngine];
    } else {
      ui.brdEngine = BoardArr2d;
    }

    if (localStorage.untilScore) {
      var scoreLimit = parseInt(localStorage.untilScore);
      if (isFinite(scoreLimit) && scoreLimit > 0)
        document.getElementById("until-score").value = scoreLimit;
    }
    if (localStorage.untilMaxVal) {
      var maxValLimit = parseInt(localStorage.untilMaxVal);
      if (isFinite(maxValLimit) && maxValLimit > 0 && maxValLimit <= 13)
        document.getElementById("until-max-value").value = maxValLimit;
    }

    if (localStorage.val2048) {
      try {
        ui.board.val2048Dom.checked = JSON.parse(localStorage.val2048);
      } catch (ex) { }
    }
    if (localStorage.savedBoard) {
      try {
        ui.board.position = JSON.parse(localStorage.savedBoard);
        if (localStorage.savedTurn)
          ui.board.turn = JSON.parse(localStorage.savedTurn);
        else
          ui.board.turn = 0;
        ui.board.update(ui.board.position);
        ui.score.update(ui.board.position, ui.board.turn);
        ui.game.checkGameOver();
      } catch (ex) { }
    } else {
      ui.action.reset();
    }

  </script>
  
</body>
</html>