// SPDX-FileCopyrightText: Chris Pressey, the creator of this work, has dedicated it to the public domain.
// For more information, please refer to <https://unlicense.org/>
// SPDX-License-Identifier: Unlicense

function launch(prefix, container, config) {
  if (typeof container === 'string') {
    container = document.getElementById(container);
  }
  config = config || {};

  function loadThese(deps, callback) {
    var loaded = 0;
    for (var i = 0; i < deps.length; i++) {
      var elem = document.createElement('script');
      elem.src = prefix + deps[i];
      elem.onload = function() {
        if (++loaded < deps.length) return;
        callback();
      }
      document.body.appendChild(elem);
    }
  }

  loadThese([
    "yoob/controller.js",
    "yoob/playfield.js",
    "yoob/playfield-canvas-view.js",
    "yoob/cursor.js",
    "dam/dam.js",
    "dam/dam-editable.js",
    "dam/dam-saveable.js"
  ], function() {
    loadThese(["gemooy.js"], function() {
      var div=DAM.maker('div'), textarea=DAM.maker('textarea'), canvas=DAM.maker('canvas');

      var subPanel = div();
      var display = canvas({ width: 400, height: 400, style: "display: inline-block" });
      var editor = textarea({ rows: "25", cols: "40", style: "display: inline-block" });

      var controlPanel = div(
        subPanel,
        div(
          DAM.makeSaveable({
            editor: editor,
            onUpdate: function(text) { c.performReset(text); },
            nameSpacePrefix: "yoob:gemooy.js:",
            presets: examplePrograms
          }),
          DAM.makeEditable({
            editor: editor,
            display: display,
            onEdit: function(text) {
              c.clickReset(text);
              subPanel.style.pointerEvents = "none";
              subPanel.style.opacity = "0.5";
            },
            onUpdate: function(text) {
              c.setResetState(text);
              c.clickReset(text);
              subPanel.style.pointerEvents = "inherit";
              subPanel.style.opacity = "inherit";
            }
          })
        ),
        display,
        editor
      )
      container.appendChild(controlPanel);

      var v = (new yoob.PlayfieldCanvasView()).init({ canvas: display });
      v.setCellDimensions(undefined, 20);

      var c = (new GemooyController()).init({
          panelContainer: subPanel,
          view: v
      });

      function convertControllerToLimiting(controller, getPlayfield) {
        var originalStep = controller.step;
        var consecutiveGrowthSteps = 0;
        var lastPlayfieldSize = null;

        var originalPerformStart = controller.performStart;
        controller.performStart = function() {
          consecutiveGrowthSteps = 0;
          lastPlayfieldSize = null;
          originalPerformStart.call(this);
        };

        controller.step = function() {
          var pf = getPlayfield(this);
          if (pf) {
            var currentSize = pf.getCursoredExtentX() * pf.getCursoredExtentY();
            if (lastPlayfieldSize !== null) {
              if (currentSize > lastPlayfieldSize) {
                consecutiveGrowthSteps++;
                if (consecutiveGrowthSteps >= 100) {
                  return 'stop';
                }
              } else {
                consecutiveGrowthSteps = 0;
              }
            }
            lastPlayfieldSize = currentSize;
          }
          return originalStep.call(this);
        };
      }

      convertControllerToLimiting(c, function() { return c.getPlayfield(); })

      c.clickStop();

      c.performReset(examplePrograms[0][1]);
      editor.value = examplePrograms[0][1];
    });
  });
}