/*
 * jQuery UI Button @VERSION
 *
 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Button
 *
 * Depends:
 *	jquery.ui.core.js
 *	jquery.ui.widget.js
 */
(function( $ ) {

var lastActive,
	baseClasses = "ui-button ui-widget ui-state-default ui-corner-all",
	otherClasses = "ui-state-hover ui-state-active " +
		"ui-button-icons-only ui-button-icon-only ui-button-text-icons ui-button-text-icon ui-button-text-only",
	formResetHandler = function( event ) {
		$( ":ui-button", event.target.form ).each(function() {
			var inst = $( this ).data( "button" );
			setTimeout(function() {
				inst.refresh();
			}, 1 );
		});
	},
	radioGroup = function( radio ) {
		var name = radio.name,
			form = radio.form,
			radios = $( [] );
		if ( name ) {
			if ( form ) {
				radios = $( form ).find( "[name='" + name + "']" );
			} else {
				radios = $( "[name='" + name + "']", radio.ownerDocument )
					.filter(function() {
						return !this.form;
					});
			}
		}
		return radios;
	};

$.widget( "ui.button", {
	options: {
		text: true,
		label: null,
		icons: {
			primary: null,
			secondary: null
		}
	},
	_create: function() {
		this.element.closest( "form" )
			.unbind( "reset.button" )
			.bind( "reset.button", formResetHandler );

		this._determineButtonType();
		this.hasTitle = !!this.buttonElement.attr( "title" );

		var self = this,
			options = this.options,
			toggleButton = this.type === "checkbox" || this.type === "radio",
			hoverClass = "ui-state-hover" + ( !toggleButton ? " ui-state-active" : "" ),
			focusClass = "ui-state-focus";

		if ( options.label === null ) {
			options.label = this.buttonElement.html();
		}

		this.buttonElement
			.addClass( baseClasses )
			.attr( "role", "button" )
			.bind( "mouseenter.button", function() {
				if ( options.disabled ) {
					return;
				}
				$( this ).addClass( "ui-state-hover" );
				if ( this === lastActive ) {
					$( this ).addClass( "ui-state-active" );
				}
			})
			.bind( "mouseleave.button", function() {
				if ( options.disabled ) {
					return;
				}
				$( this ).removeClass( hoverClass );
			})
			.bind( "focus.button", function() {
				// no need to check disabled, focus won't be triggered anyway
				$( this ).addClass( focusClass );
			})
			.bind( "blur.button", function() {
				$( this ).removeClass( focusClass );
			});

		if ( toggleButton ) {
			this.element.bind( "change.button", function() {
				self.refresh();
			});
		}

		if ( this.type === "checkbox") {
			this.buttonElement.bind( "click.button", function() {
				if ( options.disabled ) {
					return;
				}
				$( this ).toggleClass( "ui-state-active" );
				self.buttonElement.attr( "aria-pressed", self.element[0].checked );
			});
		} else if ( this.type === "radio") {
			this.buttonElement.bind( "click.button", function() {
				if ( options.disabled ) {
					return;
				}
				$( this ).addClass( "ui-state-active" );
				self.buttonElement.attr( "aria-pressed", true );

				var radio = self.element[ 0 ];
				radioGroup( radio )
					.not( radio )
					.map(function() {
						return $( this ).button( "widget" )[ 0 ];
					})
					.removeClass( "ui-state-active" )
					.attr( "aria-pressed", false );
			});
		} else {
			this.buttonElement
				.bind( "mousedown.button", function() {
					if ( options.disabled ) {
						return;
					}
					$( this ).addClass( "ui-state-active" );
					lastActive = this;
					$( document ).one( "mouseup", function() {
						lastActive = null;
					});
				})
				.bind( "mouseup.button", function() {
					if ( options.disabled ) {
						return;
					}
					$( this ).removeClass( "ui-state-active" );
				})
				.bind( "keydown.button", function(event) {
					if ( event.keyCode === $.ui.keyCode.SPACE || event.keyCode === $.ui.keyCode.ENTER ) {
						$( this ).addClass( "ui-state-active" );
					}
				})
				.bind( "keyup.button", function() {
					$( this ).removeClass( "ui-state-active" );
				});

			if ( this.buttonElement.is("a") ) {
				this.buttonElement.keyup(function(event) {
					if ( event.keyCode === $.ui.keyCode.SPACE ) {
						// TODO pass through original event correctly (just as 2nd argument doesn't work)
						$( this ).click();
					}
				});
			}
		}

		// TODO: pull out $.Widget's handling for the disabled option into
		// $.Widget.prototype._setOptionDisabled so it's easy to proxy and can
		// be overridden by individual plugins
		$.Widget.prototype._setOption.call( this, "disabled", options.disabled );
		this._resetButton();
	},

	_determineButtonType: function() {
		
		if ( this.element.is(":checkbox") ) {
			this.type = "checkbox";
		} else {
			if ( this.element.is(":radio") ) {
				this.type = "radio";
			} else {
				if (this.element.is("input") ) {
					this.type = "input";
				} else {
					this.type = "button";
				}
			}
		}
		
		if ( this.type === "checkbox" || this.type === "radio" ) {
			// we don't search against the document in case the element
			// is disconnected from the DOM
			this.buttonElement = this.element.parents().last()
				.find( "[for=" + this.element.attr("id") + "]" );
			this.element.addClass('ui-helper-hidden-accessible');

			var checked = this.element.is( ":checked" );
			if ( checked ) {
				this.buttonElement.addClass( "ui-state-active" );
			}
			this.buttonElement.attr( "aria-pressed", checked );
		} else {
			this.buttonElement = this.element;
		}
	},

	widget: function() {
		return this.buttonElement;
	},

	destroy: function() {
		this.buttonElement
			.removeClass( baseClasses + " ui-helper-hidden-accessible " + otherClasses )
			.removeAttr( "role" )
			.removeAttr( "aria-pressed" )
			.html( this.buttonElement.find(".ui-button-text").html() );

		if ( !this.hasTitle ) {
			this.buttonElement.removeAttr( "title" );
		}

		$.Widget.prototype.destroy.call( this );
	},

	_setOption: function( key, value ) {
		$.Widget.prototype._setOption.apply( this, arguments );
		this._resetButton();
	},

	refresh: function() {
		if ( this.type === "radio" ) {
			radioGroup( this.element[0] ).each(function() {
				if ( $( this ).is( ":checked" ) ) {
					$( this ).button( "widget" )
						.addClass( "ui-state-active" )
						.attr( "aria-pressed", true );
				} else {
					$( this ).button( "widget" )
						.removeClass( "ui-state-active" )
						.attr( "aria-pressed", false );
				}
			});
		} else if ( this.type === "checkbox" ) {
			if ( this.element.is( ":checked" ) ) {
				this.buttonElement
					.addClass( "ui-state-active" )
					.attr( "aria-pressed", true );
			} else {
				this.buttonElement
					.removeClass( "ui-state-active" )
					.attr( "aria-pressed", false );
			}
		}
	},

	_resetButton: function() {
		if ( this.type === "input" ) {
			if ( this.options.label ) {
				this.element.val( this.options.label );
			}
			return;
		}
		var buttonElement = this.buttonElement,
			buttonText = $( "<span></span>" )
				.addClass( "ui-button-text" )
				.html( this.options.label )
				.appendTo( buttonElement.empty() )
				.text(),
			icons = this.options.icons,
			multipleIcons = icons.primary && icons.secondary;
		if ( icons.primary || icons.secondary ) {
			buttonElement.addClass( "ui-button-text-icon" +
				( multipleIcons ? "s" : "" ) );
			if ( icons.primary ) {
				buttonElement.prepend( "<span class='ui-button-icon-primary ui-icon " + icons.primary + "'></span>" );
			}
			if ( icons.secondary ) {
				buttonElement.append( "<span class='ui-button-icon-secondary ui-icon " + icons.secondary + "'></span>" );
			}
			if ( !this.options.text ) {
				buttonElement
					.addClass( multipleIcons ? "ui-button-icons-only" : "ui-button-icon-only" )
					.removeClass( "ui-button-text-icons ui-button-text-icon" );
				if ( !this.hasTitle ) {
					buttonElement.attr( "title", buttonText );
				}
			}
		} else {
			buttonElement.addClass( "ui-button-text-only" );
		}
	}
});

$.widget( "ui.buttonset", {
	_create: function() {
		this.element.addClass( "ui-button-set" );
		this.buttons = this.element.find( ":button, :submit, :reset, :checkbox, :radio, a, :data(button)" )
			.button()
			.map(function() {
				return $( this ).button( "widget" )[ 0 ];
			})
				.removeClass( "ui-corner-all" )
				.filter( ":first" )
					.addClass( "ui-corner-left" )
				.end()
				.filter( ":last" )
					.addClass( "ui-corner-right" )
				.end()
			.end();
	},

	_setOption: function( key, value ) {
		if ( key === "disabled" ) {
			this.buttons.button( "option", key, value );
		}

		$.Widget.prototype._setOption.apply( this, arguments );
	},

	destroy: function() {
		this.element.removeClass( "ui-button-set" );
		this.buttons
			.button( "destroy" )
			.removeClass( "ui-corner-left ui-corner-right" );

		$.Widget.prototype.destroy.call( this );
	}
});

}( jQuery ));