// vim: et:ts=4:sw=4:sts=4:ft=javascript
/*@
Ox.Dialog <f:Ox.Element> Dialog object
    () ->              <f> Dialog object
    (options) ->       <f> Dialog object
    (options, self) -> <f> Dialog object
    options <o> Options object
        draggable       <b|true> is window draggable
        fullscreenable  <b|true> fixme: silly name
        height          <n|200>  height
        resizeable      <b|true> resizeable
        scaleable       <b|true> sccaleable
        width           <n|400>  width
    self <o>    Shared private variable
@*/

Ox.Dialog = function(options, self) {

    // fixme: use controlsTop/controlsBottom options, like in VideoPlayer (????)

    self = self || {};
    var that = Ox.Element({}, self)
            .defaults({
                buttons: [],
                controlsBottom: [],
                controlsTop: [],
                closeButton: false,
                content: null,
                fixedCenter: false,
                fixedSize: false,
                fixedRatio: false,
                focus: true,
                height: 200,
                keys: {},
                maxHeight: Infinity,
                maximizeButton: false,
                maxWidth: Infinity,
                minHeight: 64,
                minWidth: 128,
                title: '',
                width: 400
            })
            .options(options || {})
            .addClass('OxDialog')
            .bindEvent({
                key_enter: function() {
                    keypress('enter');
                },
                key_escape: function() {
                    keypress('escape');
                }
            })
            .hide()
            .appendTo(Ox.UI.$body);

    self.hasButtons = !!self.options.buttons.length;
    self.barsHeight = 24 + 24 * self.hasButtons;
    self.initialMaxHeight = self.options.maxHeight;
    self.initialMaxWidth = self.options.maxWidth;
    self.titleMargin = 8 + (self.options.closeButton ? 20 : 0)
        + (self.options.maximizeButton ? 20 : 0);

    if (self.options.focus) {
        self.$layer = Ox.Element() // fixme: Layer widget that would handle click?
            .addClass('OxLayer')
            .mousedown(mousedownLayer)
            .mouseup(mouseupLayer)
            .hide()
            .appendTo(Ox.UI.$body);
    }

    self.$box = $('<div>')
        .addClass('OxDialogBox')
        .css({zIndex: 11});

    self.$titlebar = Ox.Bar({
            size: 24
        })
        .addClass('OxTitlebar')
        .appendTo(that);

    if (self.options.closeButton) {
        self.$closeButton = Ox.Button({
                title: 'close',
                type: 'image'
            })
            .css({
                top: '4px',
                left: '4px'
            })
            .bindEvent({
                click: function() {
                    that.close();
                }
            })
            .appendTo(self.$titlebar);
    }

    if (self.options.maximizeButton) {
        self.$maximizeButton = Ox.Button({
                title: [
                    {id: 'add', title: 'add'},
                    {id: 'remove', title: 'remove'}
                ],
                type: 'image'
            })
            .css({
                top: '4px',
                left: '24px'
            })
            .bindEvent({
                click: maximize
            })
            .appendTo(self.$titlebar);
    }

    self.$title = Ox.Element()
        .addClass('OxTitle')
        .css({
            marginLeft: self.titleMargin + 'px',
            marginRight: self.titleMargin + 'px'
        })
        .html(self.options.title)
        .appendTo(self.$titlebar);

    setContent();

    if (self.hasButtons) {
        self.$buttonsbar = Ox.Bar({
                size: 24
            })
            .addClass('OxButtonsbar')
            .appendTo(that);
        self.$buttonsLeft = $('<div>')
            .addClass('OxButtonsLeft')
            .appendTo(self.$buttonsbar.$element);
        self.$buttonsRight = $('<div>')
            .addClass('OxButtonsRight')
            .appendTo(self.$buttonsbar.$element);
        setButtons();
    }

    if (!self.options.fixedCenter) {        
        self.$titlebar.css({
                cursor: 'move'
            })
            .bindEvent({
                doubleclick: function() {
                    !self.centered && center(true);
                },
                dragstart: dragstart,
                drag: drag,
                dragend: dragend,
            });
        self.hasButtons && self.$buttonsbar.css({
                cursor: 'move'
            })
            .bindEvent({
                doubleclick: function() {
                    !self.centered && center(true);
                },
                dragstart: dragstart,
                drag: drag,
                dragend: dragend
            });        
    }

    !self.options.fixedSize && [
        'TopLeft', 'Top', 'TopRight', 'Left', 'Right', 'BottomLeft', 'Bottom', 'BottomRight'
    ].forEach(function(edge) {
        Ox.Element()
            .addClass('OxResize OxResize' + edge)
            .bindEvent({
                doubleclick: function() {
                    reset(true);
                },
                dragstart: resizestart,
                drag: resize,
                dragend: resizeend
            })
            .appendTo(that);
    });

    function center(animate) {
        var ms = animate ? 100 : 0;
        self.centered && decenter();
        that.animate({
            left: Math.round(
                (window.innerWidth - self.options.width) / 2
            ) + 'px',
            top: Math.round(
                (window.innerHeight - self.options.height - self.barsHeight) * 0.4
            ) + 'px',
            width: self.options.width + 'px',
            height: self.options.height + self.barsHeight + 'px'
        }, ms, function() {
            that.css({
                left: 0,
                top: 0,
                right: 0,
                bottom: Math.round(
                    (window.innerHeight - self.options.height - self.barsHeight) * 0.2
                ) + 'px',
                margin: 'auto'
            });
            self.centered = true;
            Ox.isFunction(animate) && animate();
        });
    }

    function decenter() {
        var offset = that.offset();
        if (self.centered) {
            that.css({
                left: offset.left + 'px',
                top: offset.top + 'px',            
                margin: 0
            });
            self.centered = false;
        }
    }

    function dragstart(event) {
        var offset;
        if (!$(event.target).is('.OxButton')) {
            offset = that.offset();
            self.drag = {
                left: offset.left,
                top: offset.top,
                x: event.clientX,
                y: event.clientY
            };
            decenter();
            that.wrap(self.$box);
        }
    }

    function drag(event) {
        Ox.print(document.body.scrollTop, '...')
        var left, top;
        if (!$(event.target).is('.OxButton')) {
            left = Ox.limit(
                self.drag.left - self.drag.x + event.clientX,
                self.minLeft, self.maxLeft
            );
            top = Ox.limit(
                self.drag.top - self.drag.y + event.clientY,
                self.minTop, self.maxTop
            );
            setCSS({
                left: left,
                top: top
            });
        }
    }

    function dragend() {
        that.unwrap();
    }

    function getButtonById(id) {
        var ret = null;
        Ox.forEach(self.options.buttons, function(button) {
            //Ox.print(button.options(), button.options('id'))
            if (button.options && button.options('id') == id) {
                ret = button;
                return false;
            }
        });
        return ret;
    }

    function keypress(key) {
        var id = self.options.keys[key];
        Ox.print(id, getButtonById(id));
        id && getButtonById(id).$element.trigger('click');
    }

    function maximize() {
        var offset = that.offset();
        decenter();
        if (!self.maximized) {
            self.originalLeft = offset.left;
            self.originalTop = offset.top;
            self.originalWidth = self.options.width;
            self.originalHeight = self.options.height;
        }
        setCSS(self.maximized ? {
            left: self.originalLeft,
            top: self.originalTop,
            width: self.originalWidth,
            height: self.originalHeight
        } : {
            left: Math.round((window.innerWidth - self.options.maxWidth) / 2),
            top: Math.round((window.innerHeight - self.options.maxHeight - self.barsHeight) / 2),
            width: self.options.maxWidth,
            height: self.options.maxHeight
        }, true);
        self.maximized = !self.maximized;
    }

    function mousedownLayer() {
        self.$layer.stop().animate({
            opacity: 0.5
        }, 0);
    }

    function mouseupLayer() {
        self.$layer.stop().animate({
            opacity: 0
        }, 0);
    }

    function reset(animate) {
        var offset, left, top;
        if (!self.centered) {
            offset = that.offset();
            left = Ox.limit(
                offset.left + Math.round((self.options.width - self.initialWidth) / 2),
                self.minLeft, self.maxLeft
            );
            top = Ox.limit(
                offset.top + Math.round((self.options.height - self.initialHeight) / 2),
                self.minTop, self.maxTop
            );
        }
        setCSS(Ox.extend({
            width: self.initialWidth,
            height: self.initialHeight
        }, self.centered ? {} : {
            left: left,
            top: top
        }), animate);
    }

    function resizestart(event) {
        var edge = event.target.className.substr(17).toLowerCase(),
            offset = that.offset();
        self.drag = {
            edge: edge,
            height: self.options.height,
            isLeft: edge.indexOf('left') > -1,
            isTop: edge.indexOf('top') > -1,
            isRight: edge.indexOf('right') > -1,
            isBottom: edge.indexOf('bottom') > -1,
            left: offset.left,
            top: offset.top,
            width: self.options.width
        };
        decenter();
        if (self.maximized) {
            self.$maximizeButton.toggleTitle();
            self.maximized = false;
        }
        that.wrap(self.$box);
    }

    function resize(event) {
        var ratio = self.drag.width / self.drag.height, horizontal, vertical;
        if (!self.drag.fixedRatio && event.shiftKey) {
            self.drag.centerX = Math.round(self.drag.left + self.drag.width / 2);
            self.drag.centerY = Math.round(self.drag.top + self.drag.height / 2);
        }
        self.drag.fixedCenter = self.options.fixedCenter || event.altKey;
        self.drag.fixedRatio = self.options.fixedRatio || event.shiftKey;
        horizontal = self.drag.edge == 'left' || self.drag.edge == 'right'
            || ratio >= 1 || !self.drag.fixedRatio;
        vertical = self.drag.edge == 'top' || self.drag.edge == 'bottom'
            || ratio < 1 || !self.drag.fixedRatio;
        if (self.drag.isLeft && horizontal) {
            self.options.width = Ox.limit(
                self.options.width + (
                    self.drag.left - Math.min(event.clientX, self.maxLeft)
                ) * (self.drag.fixedCenter ? 2 : 1),
                self.options.minWidth,
                self.options.maxWidth
            );
            if (self.drag.fixedRatio) {
                self.options.height = Ox.limit(
                    Math.round(self.options.width / ratio),
                    self.options.minHeight,
                    self.options.maxHeight
                );
                self.options.width = Math.round(self.options.height * ratio);
            }
            setCSS(Ox.extend({
                left: self.drag.left + (
                    self.drag.width - self.options.width
                ) / (self.drag.fixedCenter ? 2 : 1),
                width: self.options.width,
            }, self.drag.fixedRatio ? {
                top: Math.max(Math.round(
                    self.drag.edge == 'topleft'
                    ? self.drag.top + self.drag.height - self.options.height
                    : self.drag.edge == 'bottomleft'
                    ? self.drag.top
                    : self.drag.centerY - self.options.height / 2
                ), self.minTop),
                height: self.options.height
            } : {}));
        }
        if (self.drag.isTop && vertical) {
            self.options.height = Ox.limit(
                self.options.height + (
                    self.drag.top - Ox.limit(event.clientY, self.minTop, self.maxTop)
                ) * (self.drag.fixedCenter ? 2 : 1),
                self.options.minHeight,
                self.options.maxHeight
            );
            if (self.drag.fixedRatio) {
                self.options.width = Ox.limit(
                    Math.round(self.options.height * ratio),
                    self.options.minWidth,
                    self.options.maxWidth
                );
                self.options.height = Math.round(self.options.width / ratio);
            }
            setCSS(Ox.extend({
                top: Math.max(self.drag.top + (
                    self.drag.height - self.options.height
                ) / (self.drag.fixedCenter ? 2 : 1), self.minTop),
                height: self.options.height,
            }, (self.drag.fixedRatio) ? {
                left: Math.round(
                    self.drag.edge == 'topleft'
                    ? self.drag.left + self.drag.width - self.options.width
                    : self.drag.edge == 'topright'
                    ? self.drag.left
                    : self.drag.centerX - self.options.width / 2
                ),
                width: self.options.width
            } : {}));
        }
        if (self.drag.isRight && horizontal) {
            self.options.width = Ox.limit(
                self.options.width + (
                    Math.max(event.clientX, 24) - self.drag.left - self.drag.width
                ) * (self.drag.fixedCenter ? 2 : 1),
                self.options.minWidth,
                self.options.maxWidth
            );
            if (self.drag.fixedRatio) {
                self.options.height = Ox.limit(
                    Math.round(self.options.width / ratio),
                    self.options.minHeight,
                    self.options.maxHeight
                );
                self.options.width = Math.round(self.options.height * ratio);
            }
            setCSS(Ox.extend({
                width: self.options.width,
            }, self.drag.fixedCenter ? {
                left: self.drag.left + (
                    self.drag.width - self.options.width
                ) / 2
            } : {}, self.drag.fixedRatio ? {
                top: Math.max(Math.round(
                    self.drag.edge == 'topright'
                    ? self.drag.top + self.drag.height - self.options.height
                    : self.drag.edge == 'bottomright'
                    ? self.drag.top
                    : self.drag.centerY - self.options.height / 2
                ), self.minTop),
                height: self.options.height
            } : {}));
        }
        if (self.drag.isBottom && vertical) {
            self.options.height = Ox.limit(
                self.options.height + (
                    Math.max(event.clientY, 24) - self.drag.top - self.drag.height - self.barsHeight
                ) * (self.drag.fixedCenter ? 2 : 1),
                self.options.minHeight,
                self.options.maxHeight
            );
            if (self.drag.fixedRatio) {
                self.options.width = Ox.limit(
                    Math.round(self.options.height * ratio),
                    self.options.minWidth,
                    self.options.maxWidth
                );
                self.options.height = Math.round(self.options.width / ratio);
            }
            setCSS(Ox.extend({
                height: self.options.height,
            }, self.drag.fixedCenter ? {
                top: Math.max(self.drag.top + (
                    self.drag.height - self.options.height
                ) / 2, self.minTop)
            } : {}, self.drag.fixedRatio && self.drag.edge == 'bottom' ? {
                left: Math.round(
                    self.drag.edge == 'bottomleft'
                    ? self.drag.left + self.drag.width - self.options.width
                    : self.drag.edge == 'bottomright'
                    ? self.drag.left
                    : self.drag.centerX - self.options.width / 2
                ),
                width: self.options.width
            } : {}));
        }
        var offset = that.offset();
        self.drag.left = offset.left;
        self.drag.top = offset.top;
        self.drag.width = self.options.width;
        self.drag.height = self.options.height;
        self.drag.minLeft = 24 - self.options.width;
        self.drag.minTop = self.hasButtons ? 24 - self.options.height - self.barsHeight : 0;
        that.triggerEvent('resize', {
            width: self.options.width,
            height: self.options.height
        });
    }

    function resizeend() {
        that.unwrap();
        that.triggerEvent('resizeend', {
            width: self.options.width,
            height: self.options.height
        });
    }

    function setButtons() {
        var buttonsLeft,
            buttonsRight,
            index = Ox.map(self.options.buttons, function(v, i) {
                return Ox.isEmpty(v) ? i : null;
            })[0];
        if (index) {
            buttonsLeft = Ox.sub(self.options.buttons, 0, index);
            buttonsRight = Ox.sub(self.options.buttons, index + 1);
        } else {
            buttonsLeft = [];
            buttonsRight = self.options.buttons;
        }
        self.$buttonsLeft.empty();
        buttonsLeft.forEach(function($button) {
            $button.addClass('OxLeft').appendTo(self.$buttonsLeft);
        });
        self.$buttonsRight.empty();
        buttonsRight.forEach(function($button) {
            $button.addClass('OxRight').appendTo(self.$buttonsRight);
        });
    }

    function setContent() {
        var animate = !!self.$content
            isImage = !self.options.content.ox && self.options.content.is('img');
        if (animate) {
            self.$content.animate({
                opacity: 0
            }, 250, function() {
                $(this).remove() // fixme: removeElement?
            });
            self.options.content.css({
                opacity: 0
            });
        }
        self.$content = (isImage ? self.options.content : Ox.Element())
            .addClass('OxContent')
            .css(self.hasButtons ? {
                bottom: '24px'
            } : {
                bottom: 0,
                borderBottomLeftRadius: '8px',
                borderBottomRightRadius: '8px'
            })
            .appendTo(that.$element);
        !isImage && self.$content.append(
            self.options.content.css(self.hasButtons ? {} : {
                borderBottomLeftRadius: '8px',
                borderBottomRightRadius: '8px'
            })
        );
        animate && self.options.content.animate({
            opacity: 1
        }, 250);
    }

    function setCSS(css, animate) {
        var ms = animate ? 100 : 0,
            offset = that.offset(),
            triggerEvent = (css.width && css.width != self.options.width)
                || (css.height && css.height != self.options.height)
        css = Ox.extend({
            left: offset.left,
            top: offset.top,
            width: self.options.width,
            height: self.options.height
        }, css);
        that.animate({
            left: css.left + 'px',
            top: css.top + 'px',
            width: css.width + 'px',
            height: css.height + self.barsHeight + 'px'
        }, ms, function() {
            self.options.width = css.width;
            self.options.height = css.height;
            self.minLeft = 24 - self.options.width;
            self.minTop = self.hasButtons ? 24 - self.options.height - self.barsHeight : 0;
            triggerEvent && that.triggerEvent('resize', {
                width: self.options.width,
                height: self.options.height
            });
            Ox.isFunction(animate) && animate();
        });
    }

    function setMinAndMax() {
        var ratio, maxRatio, minRatio;
        self.maxLeft = window.innerWidth - 24;
        self.maxTop = window.innerHeight - 24;
        self.minLeft = 24 - self.options.width;
        self.minTop = self.hasButtons ? 24 - self.options.height : 0;
        self.options.maxHeight = Ox.limit(self.initialMaxHeight, 64, window.innerHeight - self.barsHeight);
        self.options.maxWidth = Ox.limit(self.initialMaxWidth, 128, window.innerWidth);
        if (self.options.fixedRatio) {
            ratio = self.options.width / self.options.height;
            maxRatio = self.options.maxWidth / self.options.maxHeight;
            minRatio = self.options.minWidth / self.options.minHeight;
            if (maxRatio > ratio) {
                self.options.maxWidth = Math.round(self.options.maxHeight * ratio);
            } else if (maxRatio < ratio) {
                self.options.maxHeight = Math.round(self.options.maxWidth / ratio);
            } 
            if (minRatio > ratio) {
                self.options.minWidth = Math.round(self.options.minHeight * ratio);
            } else if (minRatio < ratio) {
                self.options.minHeight = Math.round(self.options.minWidth / ratio);
            }
        }
        Ox.print('sMM', self, window.innerHeight, maxRatio)
    }

    self.setOption = function(key, value) {
        if (key == 'buttons') {
            setButtons();
        } else if (key == 'content') {
            setContent();
        } else if (key == 'height') {
            setMinAndMax();
            setCSS({height: value});
        } else if (key == 'title') {
            self.$title.animate({
                opacity: 0
            }, 50, function() {
                self.$title.html(value).animate({
                    opacity: 1
                }, 50);
            });
        } else if (key == 'width') {
            setMinAndMax();
            setCSS({width: value});
        }
    };

    that.close = function(callback) {
        that.animate({
            opacity: 0
        }, 100, function() {
            //that.removeElement();
            that.hide();
            callback && callback();
        });
        if (self.maximized) {
            self.$maximizeButton.toggleTitle();
            self.maximized = false;
        }
        if (self.options.focus) {
            self.$layer.hide();
            that.loseFocus();
            Ox.UI.$window.unbind({mouseup: mouseupLayer});                
        }
        that.triggerEvent('close');
        return that;
    };

    that.disableButton = function(id) {
        getButtonById(id).options({disabled: true});
        return that;
    };

    that.enableButton = function(id) {
        getButtonById(id).options({disabled: false});
        return that;
    };

    that.open = function() {
        self.initialHeight = self.options.height;    
        self.initialWidth = self.options.width;
        setMinAndMax();
        center();
        reset();
        that.css({
            opacity: 0
        }).show().animate({
            opacity: 1
        }, 100);
        if (self.options.focus) {
            self.$layer.show();
            that.gainFocus();
            Ox.UI.$window.bind({mouseup: mouseupLayer});
        }
        Ox.UI.$window.bind({
            resize: function() {
                var offset = that.offset();
                setMinAndMax();
                if (self.centered) {
                    center();
                } else {
                    that.css({
                        left: Math.min(offset.left, self.maxLeft) + 'px',
                        top: Math.min(offset.top, self.maxTop) + 'px'
                    });
                }
            }
        });
        return that;        
    };

    that.setSize = function(width, height) {
        self.options.width = width;
        self.options.height = height;
        setMinAndMax();
        if (self.maximized) {
            self.originalWidth = width;
            self.originalHeight = height;
            self.options.width = self.options.maxWidth;
            self.options.height = self.options.maxHeight;
        }
        center(true);
        that.triggerEvent('resize', {
            width: self.options.width,
            height: self.options.height
        });
    };

    return that;

};