/*
 inspired by the lightbox plugin adapted to jquery by leandro vieira pinho (http://leandrovieira.com)
 
 @author  : nicolas turlais : nicolas-at-insipi.de
 @version : v0.3.1 - june 2012
 @license : licensed under ccattribution-sharealike
 @website : http://chocolat.insipi.de
 
*/
(function ($) {
  images = [];
  var calls = 0;
  $.fn.chocolat = function (settings) {
    settings = $.extend({
      container: $('body'),
      displayasalink: false,
      linkimages: true,
      linkscontainer: 'choco_links_container',
      overlayopacity: 0.9,
      overlaycolor: '#fff',
      fadeinoverlayduration: 500,
      fadeinimageduration: 500,
      fadeoutimageduration: 500,
      vache: true,
      separator1: ' | ',
      separator2: '/',
      leftimg: 'images/left.gif',
      rightimg: 'images/right.gif',
      closeimg: 'images/close.gif',
      loadingimg: 'images/loading.gif',
      currentimage: 0,
      setindex: 0,
      settitle: '',
      lastimage: 0
    }, settings);

    calls++;
    settings.setindex = calls;
    images[settings.setindex] = [];

    //images:
    this.each(function (index) {
      if (index == 0 && settings.linkimages && settings.settitle == '') {
        settings.settitle = isset($(this).attr('rel'), ' ');
      }
      $(this).each(function () {
        images[settings.setindex]['displayasalink'] = settings.displayasalink;
        images[settings.setindex][index] = [];
        images[settings.setindex][index]['adress'] = isset($(this).attr('href'), ' ');
        images[settings.setindex][index]['caption'] = isset($(this).attr('title'), ' ');
        if (!settings.displayasalink) {
          $(this).unbind('click').bind('click', {
            id: settings.setindex,
            nom: settings.settitle,
            i: index
          }, _initialise);
        }
      })
    });

    //setindex:
    for (var i = 0; i < images[settings.setindex].length; i++) {
      if (images[settings.setindex]['displayasalink']) {
        if ($('#' + settings.linkscontainer).size() == 0) {
          this.filter(":first").before('<ul id="' + settings.linkscontainer + '"></ul>');
        }
        $('#' + settings.linkscontainer).append('<li><a href="#" id="choco_numsetindex_' + settings.setindex + '" class="choco_link">' + settings.settitle + '</a></li>');
        e = this.parent();
        $(this).remove();
        if ($.trim(e.html()) == "") { //if parent empty : remove it
          e.remove();
        }
        return $('#choco_numsetindex_' + settings.setindex).unbind('click').bind('click', {
          id: settings.setindex,
          nom: settings.settitle,
          i: settings.currentimage
        }, _initialise);
      }
    }

    function _initialise(event) {

      settings.currentimage = event.data.i;
      settings.setindex = event.data.id;
      settings.settitle = event.data.nom;
      settings.lastimage = images[settings.setindex].length - 1;
      showchocolat();
      return false;
    }

    function _interface() {
      //html
      clear();
      settings.container.append('<div id="choco_overlay"></div><div id="choco_content"><div id="choco_close"></div><div id="choco_loading"></div><div id="choco_container_photo"><img id="choco_bigimage" src="" /></div><div id="choco_container_description"><span id="choco_container_title"></span><span id="choco_container_via"></span></div><div id="choco_left_arrow" class="choco_arrows"></div><div id="choco_right_arrow" class="choco_arrows"></div></div>');
      $('#choco_left_arrow').css('background-image', 'url(' + settings.leftimg + ')');
      $('#choco_right_arrow').css('background-image', 'url(' + settings.rightimg + ')');
      $('#choco_close').css('background-image', 'url(' + settings.closeimg + ')');
      $('#choco_loading').css('background-image', 'url(' + settings.loadingimg + ')');
      if (settings.container.get(0).nodename.tolowercase() !== 'body') {
        settings.container.css({
          'position': 'relative',
          'overflow': 'hidden',
          'line-height': 'normal'
        }); //yes, yes
        $('#choco_content').css('position', 'relative');
        $('#choco_overlay').css('position', 'absolute');
      }
      //events
      $(document).unbind('keydown').bind('keydown', function (e) {
        switch (e.keycode) {
          case 37:
            changepagechocolat(-1);
            break;
          case 39:
            changepagechocolat(1);
            break;
          case 27:
            close();
            break;
        };
      });
      if (settings.vache) {
        $('#choco_overlay').click(function () {
          close();
          return false;
        });
      }
      $('#choco_left_arrow').unbind().bind('click', function () {
        changepagechocolat(-1);
        return false;
      });
      $('#choco_right_arrow').unbind().bind('click', function () {
        changepagechocolat(1);
        return false;
      });
      $('#choco_close').unbind().bind('click', function () {
        close();
        return false;
      });
      $(window).resize(function () {
        load(settings.currentimage, true);
      });

    }

    function showchocolat() {
      _interface();
      load(settings.currentimage, false);
      $('#choco_overlay')
        .css({
          'background-color': settings.overlaycolor,
          'opacity': settings.overlayopacity
        })
        .fadein(settings.fadeinoverlayduration);
      $('#choco_content').fadein(settings.fadeinimageduration, function () {});

    }

    function load(image, resize) {
      settings.currentimage = image;
      $('#choco_loading').fadein(settings.fadeinimageduration);
      var imgpreloader = new image();
      imgpreloader.onload = function () {
        $('#choco_bigimage').attr('src', images[settings.setindex][settings.currentimage]['adress']);
        var ajustees = iwanttheperfectimagesize(imgpreloader.height, imgpreloader.width);
        chocolat(ajustees['hauteur'], ajustees['largeur'], resize);
        $('#choco_loading').stop().fadeout(settings.fadeoutimageduration);
      };
      imgpreloader.src = images[settings.setindex][settings.currentimage]['adress'];
      preload();
      upadtedescription();
    }

    function changepagechocolat(signe) {
      if (!settings.linkimages || (settings.currentimage == 0 && signe == -1) || (settings.currentimage == settings.lastimage && signe == 1)) {
        return false;
      } else {
        //$('#choco_container_description').fadeto(settings.fadeoutimageduration,0); making a weird bug with firefox 17
        $('#choco_container_description').css('visibility', 'hidden');
        $('#choco_bigimage').fadeto(settings.fadeoutimageduration, 0, function () {
          load(settings.currentimage + parseint(signe), false);
        });
      }
    }

    function chocolat(hauteur_image, largeur_image, resize) {

      if (resize) {
        $('#choco_container_photo, #choco_content, #choco_bigimage').stop(true, false).css({
          'overflow': 'visible'
        });
        $('#choco_bigimage').animate({
          'height': hauteur_image + 'px',
          'width': largeur_image + 'px'
        }, settings.fadeinimageduration);
      }
      $('#choco_container_photo').animate({
        'height': hauteur_image,
        'width': largeur_image
      }, settings.fadeinimageduration);
      $('#choco_content').animate({
        'height': hauteur_image,
        'width': largeur_image,
        'marginleft': -largeur_image / 2,
        'margintop': -(hauteur_image) / 2
      }, settings.fadeinimageduration, 'swing', function () {
        $('#choco_bigimage').fadeto(settings.fadeinimageduration, 1).height(hauteur_image).width(largeur_image);
        if (!resize) {
          arrowsmanaging();
          //$('#choco_container_description').fadeto(settings.fadeinimageduration,1); making a weird bug with firefox 17
          $('#choco_container_description').css('visibility', 'visible');
          $('#choco_close').fadein(settings.fadeinimageduration);
        }
      }).
      css('overflow', 'visible');
    }

    function arrowsmanaging() {
      if (settings.linkimages) {
        var what = ['choco_right_arrow', 'choco_left_arrow'];
        for (var i = 0; i < what.length; i++) {
          hide = false;
          if (what[i] == 'choco_right_arrow' && settings.currentimage == settings.lastimage) {
            hide = true;
            $('#' + what[i]).fadeout(300);
          } else if (what[i] == 'choco_left_arrow' && settings.currentimage == 0) {
            hide = true;
            $('#' + what[i]).fadeout(300);
          }
          if (!hide) {
            $('#' + what[i]).fadein(settings.fadeoutimageduration);
          }
        }
      }
    }

    function preload() {
      if (settings.currentimage !== settings.lastimage) {
        i = new image;
        z = settings.currentimage + 1;
        i.src = images[settings.setindex][z]['adress'];
      }
    }

    function upadtedescription() {
      var current = settings.currentimage + 1;
      var last = settings.lastimage + 1;
      $('#choco_container_title').html(images[settings.setindex][settings.currentimage]['caption']);
      $('#choco_container_via').html(settings.settitle + settings.separator1 + current + settings.separator2 + last);
    }

    function isset(variable, defaultvalue) {
      // return variable === undefined ? defaultvalue : variable; ?
      if (variable === undefined) {
        return defaultvalue;
      } else {
        return variable;
      }
    }

    function iwanttheperfectimagesize(himg, limg) {
      //28% = 14% + 14% margin
      var lblock = limg + (limg * 28 / 100);
      var heightdescandclose = $('#choco_container_description').height() + $('#choco_close').height();
      var hblock = himg + heightdescandclose;
      var k = limg / himg;
      var kk = himg / limg;
      if (settings.container.get(0).nodename.tolowercase() == 'body') {
        windowheight = $(window).height();
        windowwidth = $(window).width();
      } else {
        windowheight = settings.container.height();
        windowwidth = settings.container.width();
      }
      notfitting = true;
      while (notfitting) {
        var lblock = limg + (limg * 28 / 100);
        var hblock = himg + heightdescandclose;
        if (lblock > windowwidth) {
          limg = windowwidth * 100 / 128;

          himg = kk * limg;
        } else if (hblock > windowheight) {
          himg = (windowheight - heightdescandclose);
          limg = k * himg;
        } else {
          notfitting = false;
        };
      };
      return {
        largeur: limg,
        hauteur: himg
      };

    }

    function clear() {
      $('#choco_overlay').remove();
      $('#choco_content').remove();
    }

    function close() {
      $('#choco_overlay').fadeout(900, function () {
        $('#choco_overlay').remove()
      });
      $('#choco_content').fadeout(500, function () {
        $('#choco_content').remove()
      });
      settings.currentimage = 0;
    }

  };
})(jquery);