/*
 * jQuery miniColors: A small color selector
 *
 * Copyright 2011 Cory LaViska for A Beautiful Site, LLC. (http://abeautifulsite.net/)
 *
 * Dual licensed under the MIT or GPL Version 2 licenses
 *
*/
if(jQuery) (function($) {
    
    $.extend($.fn, {
        
        miniColors: function(o, data) {
            
            var create = function(input, o, data) {
                //
                // Creates a new instance of the miniColors selector
                //
                
                // Determine initial color (defaults to white)
                var color = expandHex(input.val());
                if( !color ) color = 'ffffff';
                var hsb = hex2hsb(color);
                
                // Create trigger
                var trigger = $('<a class="miniColors-trigger" style="background-color: #' + color + '" href="#"></a>');
                trigger.insertAfter(input);
                
                // Set input data and update attributes
                input
                    .addClass('miniColors')
                    .data('original-maxlength', input.attr('maxlength') || null)
                    .data('original-autocomplete', input.attr('autocomplete') || null)
                    .data('letterCase', 'uppercase')
                    .data('trigger', trigger)
                    .data('hsb', hsb)
                    .data('change', o.change ? o.change : null)
                    .attr('maxlength', 7)
                    .attr('autocomplete', 'off')
                    .val('#' + convertCase(color, o.letterCase));
                
                // Handle options
                if( o.readonly ) input.prop('readonly', true);
                if( o.disabled ) disable(input);
                
                // Show selector when trigger is clicked
                trigger.bind('click.miniColors', function(event) {
                    event.preventDefault();
                    if( input.val() === '' ) input.val('#');
                    show(input);

                });
                
                // Show selector when input receives focus
                input.bind('focus.miniColors', function(event) {
                    if( input.val() === '' ) input.val('#');
                    show(input);
                });
                
                // Hide on blur
                input.bind('blur.miniColors', function(event) {
                    var hex = expandHex(input.val());
                    input.val( hex ? '#' + convertCase(hex, input.data('letterCase')) : '' );
                });
                
                // Hide when tabbing out of the input
                input.bind('keydown.miniColors', function(event) {
                    if( event.keyCode === 9 ) hide(input);
                });
                
                // Update when color is typed in
                input.bind('keyup.miniColors', function(event) {
                    setColorFromInput(input);
                });
                
                // Handle pasting
                input.bind('paste.miniColors', function(event) {
                    // Short pause to wait for paste to complete
                    setTimeout( function() {
                        setColorFromInput(input);
                    }, 5);
                });
                
            };
            
            var destroy = function(input) {
                //
                // Destroys an active instance of the miniColors selector
                //
                
                hide();
                input = $(input);
                
                // Restore to original state
                input.data('trigger').remove();
                input
                    .attr('autocomplete', input.data('original-autocomplete'))
                    .attr('maxlength', input.data('original-maxlength'))
                    .removeData()
                    .removeClass('miniColors')
                    .unbind('.miniColors');
                $(document).unbind('.miniColors');
            };
            
            var enable = function(input) {
                //
                // Enables the input control and the selector
                //
                input
                    .prop('disabled', false)
                    .data('trigger')
                    .css('opacity', 1);
            };
            
            var disable = function(input) {
                //
                // Disables the input control and the selector
                //
                hide(input);
                input
                    .prop('disabled', true)
                    .data('trigger')
                    .css('opacity', 0.5);
            };
            
            var show = function(input) {
                //
                // Shows the miniColors selector
                //
                if( input.prop('disabled') ) return false;
                
                // Hide all other instances 
                hide();             
                
                // Generate the selector
                var selector = $('<div class="miniColors-selector"></div>');
                selector
                    .append('<div class="miniColors-colors" style="background-color: #FFF;"><div class="miniColors-colorPicker"></div></div>')
                    .append('<div class="miniColors-hues"><div class="miniColors-huePicker"></div></div>')
                    .css({
                        top: input.is(':visible') ? input.offset().top + input.outerHeight() : input.data('trigger').offset().top + input.data('trigger').outerHeight(),
                        left: input.is(':visible') ? input.offset().left : input.data('trigger').offset().left,
                        display: 'none'
                    })
                    .addClass( input.attr('class') );
                
                // Set background for colors
                var hsb = input.data('hsb');
                selector
                    .find('.miniColors-colors')
                    .css('backgroundColor', '#' + hsb2hex({ h: hsb.h, s: 100, b: 100 }));
                
                // Set colorPicker position
                var colorPosition = input.data('colorPosition');
                if( !colorPosition ) colorPosition = getColorPositionFromHSB(hsb);
                selector.find('.miniColors-colorPicker')
                    .css('top', colorPosition.y + 'px')
                    .css('left', colorPosition.x + 'px');
                
                // Set huePicker position
                var huePosition = input.data('huePosition');
                if( !huePosition ) huePosition = getHuePositionFromHSB(hsb);
                selector.find('.miniColors-huePicker').css('top', huePosition.y + 'px');
                
                // Set input data
                input
                    .data('selector', selector)
                    .data('huePicker', selector.find('.miniColors-huePicker'))
                    .data('colorPicker', selector.find('.miniColors-colorPicker'))
                    .data('mousebutton', 0);
                    
                $('BODY').append(selector);
                selector.fadeIn(100);
                
                // Prevent text selection in IE
                selector.bind('selectstart', function() { return false; });
                
                $(document).bind('mousedown.miniColors touchstart.miniColors', function(event) {
                    
                    input.data('mousebutton', 1);
                    
                    if( $(event.target).parents().andSelf().hasClass('miniColors-colors') ) {
                        event.preventDefault();
                        input.data('moving', 'colors');
                        moveColor(input, event);
                    }
                    
                    if( $(event.target).parents().andSelf().hasClass('miniColors-hues') ) {
                        event.preventDefault();
                        input.data('moving', 'hues');
                        moveHue(input, event);
                    }
                    
                    if( $(event.target).parents().andSelf().hasClass('miniColors-selector') ) {
                        event.preventDefault();
                        return;
                    }
                    
                    if( $(event.target).parents().andSelf().hasClass('miniColors') ) return;
                    
                    hide(input);
                });
                
                $(document)
                    .bind('mouseup.miniColors touchend.miniColors', function(event) {
                        event.preventDefault();
                        input.data('mousebutton', 0).removeData('moving');
                    })
                    .bind('mousemove.miniColors touchmove.miniColors', function(event) {
                        event.preventDefault();
                        if( input.data('mousebutton') === 1 ) {
                            if( input.data('moving') === 'colors' ) moveColor(input, event);
                            if( input.data('moving') === 'hues' ) moveHue(input, event);
                        }
                    });
                
            };
            
            var hide = function(input) {
                
                //
                // Hides one or more miniColors selectors
                //
                
                // Hide all other instances if input isn't specified
                if( !input ) input = '.miniColors';
                
                $(input).each( function() {
                    var selector = $(this).data('selector');
                    $(this).removeData('selector');
                    $(selector).fadeOut(100, function() {
                        $(this).remove();
                    });
                });
                
                $(document).unbind('.miniColors');
                
            };
            
            var moveColor = function(input, event) {

                var colorPicker = input.data('colorPicker');
                
                colorPicker.hide();
                
                var position = {
                    x: event.pageX,
                    y: event.pageY
                };
                
                // Touch support
                if( event.originalEvent.changedTouches ) {
                    position.x = event.originalEvent.changedTouches[0].pageX;
                    position.y = event.originalEvent.changedTouches[0].pageY;
                }
                position.x = position.x - input.data('selector').find('.miniColors-colors').offset().left - 5;
                position.y = position.y - input.data('selector').find('.miniColors-colors').offset().top - 5;
                if( position.x <= -5 ) position.x = -5;
                if( position.x >= 144 ) position.x = 144;
                if( position.y <= -5 ) position.y = -5;
                if( position.y >= 144 ) position.y = 144;
                
                input.data('colorPosition', position);
                colorPicker.css('left', position.x).css('top', position.y).show();
                
                // Calculate saturation
                var s = Math.round((position.x + 5) * 0.67);
                if( s < 0 ) s = 0;
                if( s > 100 ) s = 100;
                
                // Calculate brightness
                var b = 100 - Math.round((position.y + 5) * 0.67);
                if( b < 0 ) b = 0;
                if( b > 100 ) b = 100;
                
                // Update HSB values
                var hsb = input.data('hsb');
                hsb.s = s;
                hsb.b = b;
                
                // Set color
                setColor(input, hsb, true);
            };
            
            var moveHue = function(input, event) {
                
                var huePicker = input.data('huePicker');
                
                huePicker.hide();
                
                var position = {
                    y: event.pageY
                };
                
                // Touch support
                if( event.originalEvent.changedTouches ) {
                    position.y = event.originalEvent.changedTouches[0].pageY;
                }
                
                position.y = position.y - input.data('selector').find('.miniColors-colors').offset().top - 1;
                if( position.y <= -1 ) position.y = -1;
                if( position.y >= 149 ) position.y = 149;
                input.data('huePosition', position);
                huePicker.css('top', position.y).show();
                
                // Calculate hue
                var h = Math.round((150 - position.y - 1) * 2.4);
                if( h < 0 ) h = 0;
                if( h > 360 ) h = 360;
                
                // Update HSB values
                var hsb = input.data('hsb');
                hsb.h = h;
                
                // Set color
                setColor(input, hsb, true);
                
            };
            
            var setColor = function(input, hsb, updateInput) {
                input.data('hsb', hsb);
                var hex = hsb2hex(hsb); 
                if( updateInput ) input.val( '#' + convertCase(hex, input.data('letterCase')) );
                input.data('trigger').css('backgroundColor', '#' + hex);
                if( input.data('selector') ) input.data('selector').find('.miniColors-colors').css('backgroundColor', '#' + hsb2hex({ h: hsb.h, s: 100, b: 100 }));
                
                // Fire change callback
                if( input.data('change') ) {
                    if( hex === input.data('lastChange') ) return;
                    input.data('change').call(input.get(0), '#' + hex, hsb2rgb(hsb));
                    input.data('lastChange', hex);
                }
                
            };
            
            var setColorFromInput = function(input) {
                
                input.val('#' + cleanHex(input.val()));
                var hex = expandHex(input.val());
                if( !hex ) return false;
                
                // Get HSB equivalent
                var hsb = hex2hsb(hex);
                
                // If color is the same, no change required
                var currentHSB = input.data('hsb');
                if( hsb.h === currentHSB.h && hsb.s === currentHSB.s && hsb.b === currentHSB.b ) return true;
                
                // Set colorPicker position
                var colorPosition = getColorPositionFromHSB(hsb);
                var colorPicker = $(input.data('colorPicker'));
                colorPicker.css('top', colorPosition.y + 'px').css('left', colorPosition.x + 'px');
                input.data('colorPosition', colorPosition);
                
                // Set huePosition position
                var huePosition = getHuePositionFromHSB(hsb);
                var huePicker = $(input.data('huePicker'));
                huePicker.css('top', huePosition.y + 'px');
                input.data('huePosition', huePosition);
                
                setColor(input, hsb);
                
                return true;
                
            };
            
            var convertCase = function(string, letterCase) {
                if( letterCase === 'lowercase' ) return string.toLowerCase();
                if( letterCase === 'uppercase' ) return string.toUpperCase();
                return string;
            };
            
            var getColorPositionFromHSB = function(hsb) {               
                var x = Math.ceil(hsb.s / 0.67);
                if( x < 0 ) x = 0;
                if( x > 150 ) x = 150;
                var y = 150 - Math.ceil(hsb.b / 0.67);
                if( y < 0 ) y = 0;
                if( y > 150 ) y = 150;
                return { x: x - 5, y: y - 5 };
            };
            
            var getHuePositionFromHSB = function(hsb) {
                var y = 150 - (hsb.h / 2.4);
                if( y < 0 ) h = 0;
                if( y > 150 ) h = 150;              
                return { y: y - 1 };
            };
            
            var cleanHex = function(hex) {
                return hex.replace(/[^A-F0-9]/ig, '');
            };
            
            var expandHex = function(hex) {
                hex = cleanHex(hex);
                if( !hex ) return null;
                if( hex.length === 3 ) hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
                return hex.length === 6 ? hex : null;
            };          
            
            var hsb2rgb = function(hsb) {
                var rgb = {};
                var h = Math.round(hsb.h);
                var s = Math.round(hsb.s*255/100);
                var v = Math.round(hsb.b*255/100);
                if(s === 0) {
                    rgb.r = rgb.g = rgb.b = v;
                } else {
                    var t1 = v;
                    var t2 = (255 - s) * v / 255;
                    var t3 = (t1 - t2) * (h % 60) / 60;
                    if( h === 360 ) h = 0;
                    if( h < 60 ) { rgb.r = t1; rgb.b = t2; rgb.g = t2 + t3; }
                    else if( h < 120 ) {rgb.g = t1; rgb.b = t2; rgb.r = t1 - t3; }
                    else if( h < 180 ) {rgb.g = t1; rgb.r = t2; rgb.b = t2 + t3; }
                    else if( h < 240 ) {rgb.b = t1; rgb.r = t2; rgb.g = t1 - t3; }
                    else if( h < 300 ) {rgb.b = t1; rgb.g = t2; rgb.r = t2 + t3; }
                    else if( h < 360 ) {rgb.r = t1; rgb.g = t2; rgb.b = t1 - t3; }
                    else { rgb.r = 0; rgb.g = 0; rgb.b = 0; }
                }
                return {
                    r: Math.round(rgb.r),
                    g: Math.round(rgb.g),
                    b: Math.round(rgb.b)
                };
            };
            
            var rgb2hex = function(rgb) {
                var hex = [
                    rgb.r.toString(16),
                    rgb.g.toString(16),
                    rgb.b.toString(16)
                ];
                $.each(hex, function(nr, val) {
                    if (val.length === 1) hex[nr] = '0' + val;
                });
                return hex.join('');
            };
            
            var hex2rgb = function(hex) {
                hex = parseInt(((hex.indexOf('#') > -1) ? hex.substring(1) : hex), 16);
                
                return {
                    r: hex >> 16,
                    g: (hex & 0x00FF00) >> 8,
                    b: (hex & 0x0000FF)
                };
            };
            
            var rgb2hsb = function(rgb) {
                var hsb = { h: 0, s: 0, b: 0 };
                var min = Math.min(rgb.r, rgb.g, rgb.b);
                var max = Math.max(rgb.r, rgb.g, rgb.b);
                var delta = max - min;
                hsb.b = max;
                hsb.s = max !== 0 ? 255 * delta / max : 0;
                if( hsb.s !== 0 ) {
                    if( rgb.r === max ) {
                        hsb.h = (rgb.g - rgb.b) / delta;
                    } else if( rgb.g === max ) {
                        hsb.h = 2 + (rgb.b - rgb.r) / delta;
                    } else {
                        hsb.h = 4 + (rgb.r - rgb.g) / delta;
                    }
                } else {
                    hsb.h = -1;
                }
                hsb.h *= 60;
                if( hsb.h < 0 ) {
                    hsb.h += 360;
                }
                hsb.s *= 100/255;
                hsb.b *= 100/255;
                return hsb;
            };          
            
            var hex2hsb = function(hex) {
                var hsb = rgb2hsb(hex2rgb(hex));
                // Zero out hue marker for black, white, and grays (saturation === 0)
                if( hsb.s === 0 ) hsb.h = 360;
                return hsb;
            };
            
            var hsb2hex = function(hsb) {
                return rgb2hex(hsb2rgb(hsb));
            };

            
            // Handle calls to $([selector]).miniColors()
            switch(o) {
            
                case 'readonly':
                    
                    $(this).each( function() {
                        if( !$(this).hasClass('miniColors') ) return;
                        $(this).prop('readonly', data);
                    });
                    
                    return $(this);
                
                case 'disabled':
                    
                    $(this).each( function() {
                        if( !$(this).hasClass('miniColors') ) return;
                        if( data ) {
                            disable($(this));
                        } else {
                            enable($(this));
                        }
                    });
                                        
                    return $(this);
            
                case 'value':
                    
                    // Getter
                    if( data === undefined ) {
                        if( !$(this).hasClass('miniColors') ) return;
                        var input = $(this),
                            hex = expandHex(input.val());
                        return hex ? '#' + convertCase(hex, input.data('letterCase')) : null;
                    }
                    
                    // Setter
                    $(this).each( function() {
                        if( !$(this).hasClass('miniColors') ) return;
                        $(this).val(data);
                        setColorFromInput($(this));
                    });
                    
                    return $(this);
                    
                case 'destroy':
                    
                    $(this).each( function() {
                        if( !$(this).hasClass('miniColors') ) return;
                        destroy($(this));
                    });
                                        
                    return $(this);
                
                default:
                    
                    if( !o ) o = {};
                    
                    $(this).each( function() {
                        
                        // Must be called on an input element
                        if( $(this)[0].tagName.toLowerCase() !== 'input' ) return;
                        
                        // If a trigger is present, the control was already created
                        if( $(this).data('trigger') ) return;
                        
                        // Create the control
                        create($(this), o, data);
                        
                    });
                    
                    return $(this);
                    
            }
            
        }
            
    });
    
})(jQuery);
