/*!
 * jQuery Blinds
 * http://www.littlewebthings.com/projects/blinds
 *
 * Copyright 2010, Vassilis Dourdounis
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
(function($){

  $.fn.blinds = function (options) {
    $(this).find('li').hide();
    $(this).addClass('blinds_slideshow');

    settings = {};
    settings.tile_orchestration = this.tile_orchestration;

    settings.h_res = 12;
    settings.v_res = 1;

    settings.width = $(this).find('li:first').width();
    settings.height = $(this).find('li:first').height();

    jQuery.extend(settings, options);

    tiles_width = settings.width / settings.h_res;
    tiles_height = settings.height / settings.v_res;

    // Get image list
    blinds_images = [];
    $(this).find('img').each(function (i, e) {
      blinds_images[blinds_images.length] = {'title': e.alt, 'src': e.src}
    });

    // Create blinds_container
    $(this).append('<div class="blinds_container"></div>');

    blinds_container = $(this).find('.blinds_container');
    blinds_container.css({
      'position'  : 'absolute', 
      'display'   : 'block', 
      'width'     : settings.width, 
      'height'    : settings.height, 
      'background': 'transparent url("' + blinds_images[1]['src'] + '") 0px 0px no-repeat'
    } );
    // Setup tiles
    for (i = 0; i < settings.h_res; i++) {
      for (j = 0; j < settings.v_res; j++) {
        if (tile = $(this).find('.tile_' + i + '_' + j)) {
          h = '<div class="outer_tile_' + i + '_' + j + '"><div class="tile_' + i + '_' + j + '"></div></div>';
          blinds_container.append(h);
          outer_tile = $(this).find('.outer_tile_' + i + '_' + j);
          outer_tile.css({
            'position'  : 'absolute',
            'width'     : tiles_width,
            'height'    : tiles_height,
            'left'      : i * tiles_width,
            'top'       : j * tiles_height
          })

          tile = $(this).find('.tile_' + i + '_' + j);
          tile.css({
            'position'  : 'absolute',
            'width'     : tiles_width,
            'height'    : tiles_height,
            'left'      : 0,
            'top'       : 0,
            'background': 'transparent url("' + blinds_images[0]['src'] + '") -' + (i * tiles_width) + 'px -' + (j * tiles_height) + 'px no-repeat' 
          })
          
          jQuery.data($(tile)[0], 'blinds_position', {'i': i, 'j': j});
        }
      }
    }

    jQuery.data(this[0], 'blinds_config', {
      'h_res': settings.h_res,
      'v_res': settings.v_res,
      'tiles_width': tiles_width,
      'tiles_height': tiles_height,
      'images': blinds_images,
      'img_index': 0,
      'change_buffer': 0,
      'tile_orchestration': settings.tile_orchestration
    });
  }
  
  $.fn.blinds_change = function (img_index) {

    // reset all sprites
    config = jQuery.data($(this)[0], 'blinds_config');
    for (i = 0; i < config.h_res; i++) {
      for (j = 0; j < config.v_res; j++) {
        $(this).find('.tile_' + i + '_' + j).show().css('background', 'transparent ' + 'url("' + config.images[config.img_index]['src'] + '") -' + (i * config.tiles_width) + 'px -' + (j * config.tiles_height) + 'px no-repeat');
      }
    }

    $(this).children('.blinds_container').css('background', 'transparent url("' + blinds_images[img_index]['src'] + '") 0px 0px no-repeat' );

    config.img_index = img_index;
    jQuery.data($(this)[0], 'blinds_config', config);

    for (i = 0; i < config.h_res; i++) {
      for (j = 0; j < config.v_res; j++) {
        t = config.tile_orchestration(i, j, config.h_res, config.v_res);
        
        config = jQuery.data($(this)[0], 'blinds_config');
        config.change_buffer = config.change_buffer + 1;
        jQuery.data(this[0], 'blinds_config', config);

        $(this).find('.tile_' + i + '_' + j).fadeOut(t, function() {
          blinds_pos = jQuery.data($(this)[0], 'blinds_position');
          config = jQuery.data($(this).parents('.blinds_slideshow')[0], 'blinds_config');

          $(this).css('background', 'transparent ' + 'url("' + config.images[config.img_index]['src'] + '") -' + (blinds_pos.i * config.tiles_width) + 'px -' + (blinds_pos.j * config.tiles_height) + 'px no-repeat');

          config.change_buffer = config.change_buffer - 1;
          jQuery.data($(this).parents('.blinds_slideshow')[0], 'blinds_config', config);

          if (config.change_buffer == 0) {
            $(this).parent().parent().children().children().show();
          }

        });
      }
    }
  }

  $.fn.tile_orchestration = function (i, j, total_x, total_y) {
    return (Math.abs(i-total_x/2)+Math.abs(j-total_y/2))*100;
  }

})(jQuery);