/* globals jQuery */

(function($) {
  // Selector to select only not already processed elements
  $.expr[":"].notmdproc = function(obj){
    if ($(obj).data("mdproc")) {
      return false;
    } else {
      return true;
    }
  };

  function _isChar(evt) {
    if (typeof evt.which == "undefined") {
      return true;
    } else if (typeof evt.which == "number" && evt.which > 0) {
      return !evt.ctrlKey
        && !evt.metaKey
        && !evt.altKey
        && evt.which != 8  // backspace
        && evt.which != 9  // tab
        && evt.which != 13 // enter
        && evt.which != 16 // shift
        && evt.which != 17 // ctrl
        && evt.which != 20 // caps lock
        && evt.which != 27; // escape
    }
    return false;
  }

  function _addFormGroupFocus(element){
    var $element = $(element);
    if (!$element.prop('disabled')) {  // this is showing as undefined on chrome but works fine on firefox??
      $element.closest(".form-group").addClass("is-focused");
    }
  }

  function _toggleTypeFocus($input){
    $input.closest('label').hover(function() {
      var $i = $(this).find('input');
      if (!$i.prop('disabled')) { // hack because the _addFormGroupFocus() wasn't identifying the property on chrome
        _addFormGroupFocus($i);     // need to find the input so we can check disablement
      }
    }, function() {
      _removeFormGroupFocus($(this).find('input'));
    });
  }

  function _removeFormGroupFocus(element){
    $(element).closest(".form-group").removeClass("is-focused"); // remove class from form-group
  }

  $.material =  {
    "options": {
      // These options set what will be started by $.material.init()
      "validate": true,
      "input": true,
      "ripples": true,
      "checkbox": true,
      "togglebutton": true,
      "radio": true,
      "arrive": true,
      "autofill": false,

      "withRipples": [
        ".btn:not(.btn-link)",
        ".card-image",
        ".navbar a:not(.withoutripple)",
        ".dropdown-menu a",
        ".nav-tabs a:not(.withoutripple)",
        ".withripple",
        ".pagination li:not(.active):not(.disabled) a:not(.withoutripple)"
      ].join(","),
      "inputElements": "input.form-control, textarea.form-control, select.form-control",
      "checkboxElements": ".checkbox > label > input[type=checkbox]",
      "togglebuttonElements": ".togglebutton > label > input[type=checkbox]",
      "radioElements": ".radio > label > input[type=radio]"
    },
    "checkbox": function(selector) {
      // Add fake-checkbox to material checkboxes
      var $input = $((selector) ? selector : this.options.checkboxElements)
      .filter(":notmdproc")
      .data("mdproc", true)
      .after("<span class='checkbox-material'><span class='check'></span></span>");

      _toggleTypeFocus($input);
    },
    "togglebutton": function(selector) {
      // Add fake-checkbox to material checkboxes
      var $input = $((selector) ? selector : this.options.togglebuttonElements)
      .filter(":notmdproc")
      .data("mdproc", true)
      .after("<span class='toggle'></span>");

      _toggleTypeFocus($input);
    },
    "radio": function(selector) {
      // Add fake-radio to material radios
      var $input = $((selector) ? selector : this.options.radioElements)
      .filter(":notmdproc")
      .data("mdproc", true)
      .after("<span class='circle'></span><span class='check'></span>");

      _toggleTypeFocus($input);
    },
    "input": function(selector) {
      $((selector) ? selector : this.options.inputElements)
      .filter(":notmdproc")
      .data("mdproc", true)
      .each( function() {
        var $input = $(this);

        // Requires form-group standard markup (will add it if necessary)
        var $formGroup = $input.closest(".form-group"); // note that form-group may be grandparent in the case of an input-group
        if($formGroup.length === 0){
          $input.wrap("<div class='form-group'></div>");
          $formGroup = $input.closest(".form-group"); // find node after attached (otherwise additional attachments don't work)
        }

        // Legacy - Add hint label if using the old shorthand data-hint attribute on the input
        if ($input.attr("data-hint")) {
          $input.after("<p class='help-block'>" + $input.attr("data-hint") + "</p>");
          $input.removeAttr("data-hint");
        }

        // Legacy - Change input-sm/lg to form-group-sm/lg instead (preferred standard and simpler css/less variants)
        var legacySizes = {
          "input-lg": "form-group-lg",
          "input-sm": "form-group-sm"
        };
        $.each( legacySizes, function( legacySize, standardSize ) {
          if ($input.hasClass(legacySize)) {
            $input.removeClass(legacySize);
            $formGroup.addClass(standardSize);
          }
        });

        // Legacy - Add label-floating if using old shorthand <input class="floating-label" placeholder="foo">
        if ($input.hasClass("floating-label")) {
          var placeholder = $input.attr("placeholder");
          $input.attr("placeholder", null).removeClass("floating-label");
          var id = $input.attr("id");
          var forAttribute = "";
          if(id) {
            forAttribute = "for='" + id + "'";
          }
          $formGroup.addClass("label-floating");
          $input.after("<label " + forAttribute + "class='control-label'>" + placeholder + "</label>");
        }

        // Set as empty if is empty (damn I must improve this...)
        if ($input.val() === null || $input.val() == "undefined" || $input.val() === "") {
          $formGroup.addClass("is-empty");
        }

          // Add at the end of the form-group
        $formGroup.append("<span class='material-input'></span>");

        // Support for file input
        if ($formGroup.find("input[type=file]").length > 0) {
          $formGroup.addClass("is-fileinput");
        }
      });
    },
    "attachInputEventHandlers": function() {
      var validate = this.options.validate;

      $(document)
      .on("change", ".checkbox input[type=checkbox]", function() { $(this).blur(); })
      .on("keydown paste", ".form-control", function(e) {
        if(_isChar(e)) {
          $(this).closest(".form-group").removeClass("is-empty");
        }
      })
      .on("keyup change", ".form-control", function() {
        var $input = $(this);
        var $formGroup = $input.closest(".form-group");
        var isValid = (typeof $input[0].checkValidity === "undefined" || $input[0].checkValidity());

        if ($input.val() === "" && isValid) {
          $formGroup.addClass("is-empty");
        }
        else {
          $formGroup.removeClass("is-empty");
        }

        // Validation events do not bubble, so they must be attached directly to the input: http://jsfiddle.net/PEpRM/1/
        //  Further, even the bind method is being caught, but since we are already calling #checkValidity here, just alter
        //  the form-group on change.
        //
        // NOTE: I'm not sure we should be intervening regarding validation, this seems better as a README and snippet of code.
        //        BUT, I've left it here for backwards compatibility.
        if(validate) {
          if (isValid) {
            $formGroup.removeClass("has-error");
          }
          else {
            $formGroup.addClass("has-error");
          }
        }
      })
      .on("focus", ".form-control, .form-group.is-fileinput", function() {
        _addFormGroupFocus(this);
      })
      .on("blur", ".form-control, .form-group.is-fileinput", function() {
        _removeFormGroupFocus(this);
      })
      // make sure empty is added back when there is a programmatic value change.
      //  NOTE: programmatic changing of value using $.val() must trigger the change event i.e. $.val('x').trigger('change')
      .on("change", ".form-group input", function() {
        var $input = $(this);
        if($input.attr("type") == "file") {
          return;
        }

        var $formGroup = $input.closest(".form-group");
        var value = $input.val();
        if (value) {
          $formGroup.removeClass("is-empty");
        } else {
          $formGroup.addClass("is-empty");
        }
      })
      // set the fileinput readonly field with the name of the file
      .on("change", ".form-group.is-fileinput input[type='file']", function() {
        var $input = $(this);
        var $formGroup = $input.closest(".form-group");
        var value = "";
        $.each(this.files, function(i, file) {
          value += file.name + ", ";
        });
        value = value.substring(0, value.length - 2);
        if (value) {
          $formGroup.removeClass("is-empty");
        } else {
          $formGroup.addClass("is-empty");
        }
        $formGroup.find("input.form-control[readonly]").val(value);
      });
    },
    "ripples": function(selector) {
      $((selector) ? selector : this.options.withRipples).ripples();
    },
    "autofill": function() {
      // This part of code will detect autofill when the page is loading (username and password inputs for example)
      var loading = setInterval(function() {
        $("input[type!=checkbox]").each(function() {
          var $this = $(this);
          if ($this.val() && $this.val() !== $this.attr("value")) {
            $this.trigger("change");
          }
        });
      }, 100);

      // After 10 seconds we are quite sure all the needed inputs are autofilled then we can stop checking them
      setTimeout(function() {
        clearInterval(loading);
      }, 10000);
    },
    "attachAutofillEventHandlers": function() {
      // Listen on inputs of the focused form (because user can select from the autofill dropdown only when the input has focus)
      var focused;
      $(document)
      .on("focus", "input", function() {
        var $inputs = $(this).parents("form").find("input").not("[type=file]");
        focused = setInterval(function() {
          $inputs.each(function() {
            var $this = $(this);
            if ($this.val() !== $this.attr("value")) {
              $this.trigger("change");
            }
          });
        }, 100);
      })
      .on("blur", ".form-group input", function() {
        clearInterval(focused);
      });
    },
    "init": function(options) {
      this.options = $.extend({}, this.options, options);
      var $document = $(document);

      if ($.fn.ripples && this.options.ripples) {
        this.ripples();
      }
      if (this.options.input) {
        this.input();
        this.attachInputEventHandlers();
      }
      if (this.options.checkbox) {
        this.checkbox();
      }
      if (this.options.togglebutton) {
        this.togglebutton();
      }
      if (this.options.radio) {
        this.radio();
      }
      if (this.options.autofill) {
        this.autofill();
        this.attachAutofillEventHandlers();
      }

      if (document.arrive && this.options.arrive) {
        if ($.fn.ripples && this.options.ripples) {
          $document.arrive(this.options.withRipples, function() {
            $.material.ripples($(this));
          });
        }
        if (this.options.input) {
          $document.arrive(this.options.inputElements, function() {
            $.material.input($(this));
          });
        }
        if (this.options.checkbox) {
          $document.arrive(this.options.checkboxElements, function() {
            $.material.checkbox($(this));
          });
        }
        if (this.options.radio) {
          $document.arrive(this.options.radioElements, function() {
            $.material.radio($(this));
          });
        }
        if (this.options.togglebutton) {
          $document.arrive(this.options.togglebuttonElements, function() {
            $.material.togglebutton($(this));
          });
        }

      }
    }
  };

})(jQuery);