/*	Copyright (c) 2017 Jean-Marc VIGLINO, 
  released under the CeCILL-B license (French BSD license)
  (http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt).
*/

import ol_filter_Base from './Base.js'

/** Make a map or layer look like made of a set of Lego bricks.
 *  @constructor
 * @requires ol_filter
 * @extends {ol_filter_Base}
 * @param {Object} [options]
 *  @param {string} [options.img]
 *  @param {number} [options.brickSize] size of te brick, default 30
 *  @param {null | string | undefined} [options.crossOrigin] crossOrigin attribute for loaded images.
 */
var ol_filter_Lego = class olfilterLego extends ol_filter_Base {
  constructor(options) {
    options = options || {};
    super(options);

    var img = new Image();
    // Default image
    img.src = this.img[options.img] || this.img.ol3;
    img.crossOrigin = options.crossOrigin || null;

    // and pattern 
    this.pattern = {
      canvas: document.createElement('canvas')
    };

    this.setBrick(options.brickSize, img);
    this.internal_ = document.createElement('canvas');
  }
  /** Overwrite to handle brickSize
  * @param {string} key
  * @param {any} val
  */
  set(key, val) {
    super.set(key, val);
    if (key == "brickSize" && this.pattern && this.pattern.canvas.width != val) {
      this.setBrick(val);
    }
  }
  /** Set the current brick
  *	@param {number} width the pattern width, default 30
  *	@param {'brick'|'ol3'|'lego'|undefined} img the pattern, default ol3
  *	@param {string} crossOrigin
  */
  setBrick(width, img, crossOrigin) {
    width = Number(width) || 30;
    if (typeof (img) === 'string') {
      var i = new Image;
      i.src = this.img[img] || this.img.ol3;
      i.crossOrigin = crossOrigin || null;
      img = i;
    }
    if (img)
      this.pattern.img = img;
    if (!this.pattern.img.width) {
      var self = this;
      this.pattern.img.onload = function () {
        self.setBrick(width, img);
      };
      return;
    }
    this.pattern.canvas.width = this.pattern.canvas.height = width;
    this.pattern.ctx = this.pattern.canvas.getContext("2d");
    this.pattern.ctx.fillStyle = this.pattern.ctx.createPattern(this.pattern.img, 'repeat');
    this.set("brickSize", width);
    if (img)
      this.set("img", img.src);
  }
  /** Get translated pattern
  *	@param {number} offsetX x offset
  *	@param {number} offsetY y offset
  */
  getPattern(offsetX, offsetY) {
    if (!this.pattern.ctx)
      return "transparent";
    //return this.pattern.ctx.fillStyle
    var c = this.pattern.canvas;
    var ctx = this.pattern.ctx;
    var sc = c.width / this.pattern.img.width;

    ctx.save();
    ctx.clearRect(0, 0, c.width, c.height);

    ctx.scale(sc, sc);
    offsetX /= sc;
    offsetY /= sc;

    ctx.translate(offsetX, offsetY);
    ctx.beginPath();
    ctx.clearRect(-2 * c.width, -2 * c.height, 4 * c.width, 4 * c.height);
    ctx.rect(-offsetX, -offsetY, 2 * c.width / sc, 2 * c.height / sc);
    ctx.fill();
    ctx.restore();
    return ctx.createPattern(c, 'repeat');
  }
  /** Postcompose operation
  */
  postcompose(e) {
    // Set back color hue
    var ctx = e.context;
    var canvas = ctx.canvas;
    var ratio = e.frameState.pixelRatio;
    /* ol v6+
    if (e.type === 'postrender') {
      ratio = 1;
    }
    */

    ctx.save();

    // resize 
    var step = this.pattern.canvas.width * ratio;
    var p = e.frameState.extent;
    var res = e.frameState.viewState.resolution / ratio;
    var offset = [-Math.round((p[0] / res) % step), Math.round((p[1] / res) % step)];
    var ctx2 = this.internal_.getContext("2d");
    var w = this.internal_.width = canvas.width;
    var h = this.internal_.height = canvas.height;

    // No smoothing please
    ctx2.webkitImageSmoothingEnabled =
      ctx2.mozImageSmoothingEnabled =
      ctx2.msImageSmoothingEnabled =
      ctx2.imageSmoothingEnabled = false;
    var w2 = Math.floor((w - offset[0]) / step);
    var h2 = Math.floor((h - offset[1]) / step);
    ctx2.drawImage(canvas, offset[0], offset[1], w2 * step, h2 * step, 0, 0, w2, h2);
    //
    ctx.webkitImageSmoothingEnabled =
      ctx.mozImageSmoothingEnabled =
      ctx.msImageSmoothingEnabled =
      ctx.imageSmoothingEnabled = false;
    ctx.clearRect(0, 0, w, h);
    ctx.drawImage(this.internal_, 0, 0, w2, h2, offset[0], offset[1], w2 * step, h2 * step);
    /*
        for (var x=offset[0]; x<w; x+=step) for (var y=offset[1]; y<h; y+=step)
        {	if (x>=0 && y<h) ctx2.drawImage (canvas, x, y, 1, 1, x, y, step, step);
        }
        ctx.clearRect (0, 0, w,h);
        ctx.drawImage (c, 0, 0);
    */
    // Draw brick stud
    ctx.scale(ratio, ratio);
    ctx.fillStyle = this.getPattern(offset[0] / ratio, offset[1] / ratio);
    ctx.rect(0, 0, w, h);
    ctx.fill();

    ctx.restore();
  }
}

/** Image definition
*/
ol_filter_Lego.prototype.img = {
  brick: "data:image/png;base64,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",
  ol3: "data:image/png;base64,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",
  lego: "data:image/png;base64,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"
};

export default ol_filter_Lego
