/**
 *  workspace-draggable.js - what a drag
 *    Applied to odkControl and toolButton; basic dragging functionality
 *      onto the workspace and interactions with existing controls.
 */

var workspace_init =function($)
{
    // private methods
    var scrollTimer;
    var scrolling = false;
    var checkScroll = function(position, config)
    {
        var $workspaceScrollArea = $('.workspaceScrollArea:visible');
        var workspaceOffset = $workspaceScrollArea.offset();

        if (position.top < (workspaceOffset.top + config.scrollMargin))
        {
            if (!scrolling)
            {
                scrolling = true;
                clearInterval(scrollTimer);

                scrollTimer = setInterval(function()
                {
                    $workspaceScrollArea.scrollTop($workspaceScrollArea.scrollTop() - config.scrollSpeed);
                }, config.scrollSpeed);
            }
        }
        else if (position.top > (workspaceOffset.top + $workspaceScrollArea.outerHeight(false) - config.scrollMargin))
        {
            if (!scrolling)
            {
                scrolling = true;
                clearInterval(scrollTimer);

                scrollTimer = setInterval(function()
                {
                    $workspaceScrollArea.scrollTop($workspaceScrollArea.scrollTop() + config.scrollSpeed);
                }, config.scrollSpeed);
            }
        }
        else
        {
            scrolling = false;
            clearInterval(scrollTimer);
        }
    };

    var checkElemHover = function($elem, position, config, $container, thisControl, targetUI)
    {
		// Process for Invoice Table
		if (checkCanDropIntoGroup(thisControl, $elem) == false) {
			return false;
		}
		if(thisControl.is('.multi-selected') && multiSelectedControls){
			for (var key in multiSelectedControls) {
				if(key == '__CTRLS__' || key == '__LAST_SEL__'){
					continue;
				}
				if (checkCanDropIntoGroup(multiSelectedControls['__CTRLS__'][key], $elem) == false) {
					return false;
				}
			}
		}

		var properties = thisControl.data('odkControl-properties');
		if(!isVersion(VERSION_STRICT_FORM_BUILDER) && isFormOpenSpecial && !isVersion(VERSION_ADD_DEL_CTRL_OSP) && (!isVersion(VERSION_ADD_CTRL_OSP) || (properties && properties.name.isOldCtrl))){
			if(!properties){
				return false;
			}else if(properties.ctrlDesc){
				if(!isVersion(VERSION_FORM_BUILDER_EDIT_STOP_MOVETO_CONTAINER)){
					if(properties.ctrlDesc.isInsideTheRepeat || 
						properties.ctrlDesc.isInsideTheTable){
						return false;
					}
				}else{
					if(properties.ctrlDesc.isInsideTheRepeat || 
						properties.ctrlDesc.isInsideTheTable || 
						properties.ctrlDesc.isInsideTheGrid || 
						properties.ctrlDesc.isInsideTheButtonGrid || 
						properties.ctrlDesc.isInsideThePOD){
						return false;
					}
				}
			}
		}
        // if element is clearly beyond our scope, clear placeholders and abort
        if (position.top > $elem.innerHeight())
        {
            $elem.find('.placeholder')
                .addClass('closing')
                .slideUp('normal', function()
                {
                    $(this).remove();
                });
           return false;
        }

        // set $container to self if not defined
        if (($container === undefined) || ($container === null))
            $container = $elem;

        // otherwise, if there are no controls in the container, add a
        // placeholder and return as found
        if ($container.children(':not(.placeholder)').length === 0)
        {
            if ($container.find('.placeholder').length === 0){
                config.dragCallback($container, 0);
			}
            return true;
        }

        var stackHeight = $container.offset().top - $elem.offset().top;
        var found = false;

        $container.children().each(function()
        {
            var $control = $(this);

            // Skip the placeholder; special case for groups/branches
            if ($control.is('.placeholder'))
            {
                stackHeight += $control.outerHeight(true);
                return;
            }
            else if ($control.is('.group'))
            {
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlTable'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlSchedule'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlPOD'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlScoreTable'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlButtonGrid'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlGrid'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            } else if ($control.is('.ctrlBreakPointData'))
            {           	
				if (position.top > (stackHeight + 30)){
					var $groupContainer = $control.children('.workspaceInnerWrapper').children('.workspaceInner');
					found = checkElemHover($control, { top: position.top - stackHeight, left: position.left }, config, $groupContainer, thisControl, $control);
					if (found)
						return false;
				}
            }

            var threshold = $control.innerHeight() / 3;

            // Check the top of the current block
            if (position.top < (stackHeight + threshold))
            {
                if (! $control.prev().is('.placeholder'))
				{
                    config.dragCallback($control, -1);
				}
                found = true;
                return false;
            }

            // Add the height
            stackHeight += $control.outerHeight(true);

            // Check the bottom of the current block
            if ((position.top > (stackHeight - threshold)) &&
                (position.top < stackHeight))
            {
                if (! $control.next().is('.placeholder')){
                    config.dragCallback($control, 1);
				}
                found = true;
                return false;
            }
        });
		
        return found;
    };

    var checkHover = function($this, position, config)
    {
		var properties = $this.data('odkControl-properties');
		if(!isVersion(VERSION_STRICT_FORM_BUILDER) && isFormOpenSpecial && !isVersion(VERSION_ADD_DEL_CTRL_OSP) && (!isVersion(VERSION_ADD_CTRL_OSP) || (properties && properties.name.isOldCtrl))){
			if(!properties){
				return false;
			}else if(properties.ctrlDesc){
				if(!isVersion(VERSION_FORM_BUILDER_EDIT_STOP_MOVETO_CONTAINER)){
					if(properties.ctrlDesc.isInsideTheRepeat || 
						properties.ctrlDesc.isInsideTheTable){
						return false;
					}
				}else{
					if(properties.ctrlDesc.isInsideTheRepeat || 
						properties.ctrlDesc.isInsideTheTable || 
						properties.ctrlDesc.isInsideTheGrid || 
						properties.ctrlDesc.isInsideTheButtonGrid || 
						properties.ctrlDesc.isInsideThePOD){
						return false;
					}
				}
			}
		}
        // Check bounds
        var $workspaceScrollArea = $('.workspaceScrollArea:visible');
        var workspaceOffset = $workspaceScrollArea.offset();
        if ((position.left < workspaceOffset.left) ||
            (position.left > (workspaceOffset.left + $workspaceScrollArea.outerWidth(false))) ||
            (position.top < workspaceOffset.top) ||
            (position.top > (workspaceOffset.top + $workspaceScrollArea.outerHeight(false))))
            return;

        // Append as necessary
        var $workspace = $('.workspace:visible');
        var stackHeight = workspaceOffset.top - $workspaceScrollArea.scrollTop() +
                          $workspaceScrollArea.spacingTop() + $workspace.spacingTop();
        position.top -= stackHeight;

        // Fallback: if we haven't matched any of the above cases
        // we're at the end of the line, so just add it after here.
        if((!checkElemHover($workspace, position, config, null, $this)) && ($workspace.children(':last-child').is(':not(.placeholder)'))){
			config.dragCallback($workspace.children(':last-child'), 1);
		}
    };

    $.fn.workspaceDraggable = function(options)
    {
		if(isVersion(VERSION_STRICT_FORM_BUILDER) && isFormOpenSpecial && !isVersion(VERSION_ADD_DEL_CTRL_OSP) && !isVersion(VERSION_ADD_CTRL_OSP)){
			return false;
		}
        var options = $.extend({}, $.fn.workspaceDraggable.defaults, options);

        return this.each(function()
        {
			if(!isVersion(VERSION_STRICT_FORM_BUILDER) && isFormOpenSpecial && !isVersion(VERSION_ADD_DEL_CTRL_OSP) && !isVersion(VERSION_ADD_CTRL_OSP)){
				return false;
			}
			
            var $this = $(this);

            // Support the metadata plugin
            var config = $.meta ? $.extend({}, options, $this.data()) : options;
			
            $(this).draggable($.extend({}, {
                addClass: false,
                appendTo: 'body',
                distance: 5,
                helper: 'clone',
                opacity: 0.8,
                scroll: false,
                drag: function(event, ui)
                {
					if($this.hasClass('inputDiable')){
						return;
					}
					if($this.hasClass('inputDiableForDsp')){
						return;
					}
					if($this.hasClass('scheduleSpecialCtrl')){
						//return;
					}
					if($this.hasClass('podSpecialCtrl')){
						//return;
					}
					if($this.hasClass('invSpecialCtrl')){
						//return;
					}
					if($this.hasClass('ctrlDataSource')){
						return;
					}
					if($this.hasClass('ctrlHeaderGrid')){
						return;
					}
					if($this.hasClass('ctrlDataFilter')){
						return;
					}
					if($this.hasClass('ctrlReportBreakPoint')){
						return;
					}
					if($this.hasClass('ctrlBreakPointData')){
						return;
					}
					if($this.hasClass('ctrlFooterGrid')){
						return;
					}
					if($this.hasClass('ctrlEmailSchedule')){
						return;
					}
					if($(this).is('.multi-selected')){
						$('.workspaceScrollArea:visible .multi-selected').addClass('hideSessionForMoveImp');
					}
                    checkScroll({ left: ui.position.left, top: ui.position.top }, config);
                    checkHover($this, { left: ui.position.left, top: ui.position.top }, config);
                },
                stop: function(event, ui)
                {
					if($(this).is('.multi-selected')){
						$('.workspaceScrollArea:visible .multi-selected').removeClass('hideSessionForMoveImp');
					}
					if($this.hasClass('scheduleSpecialCtrl')){
						//return;
					}
					if($this.hasClass('podSpecialCtrl')){
						//return;
					}
					if($this.hasClass('invSpecialCtrl')){
						//return;
					}
					if($this.hasClass('ctrlDataSource')){
						return;
					}
					if($this.hasClass('ctrlHeaderGrid')){
						return;
					}
					if($this.hasClass('ctrlDataFilter')){
						return;
					}
					if($this.hasClass('ctrlReportBreakPoint')){
						return;
					}
					if($this.hasClass('ctrlBreakPointData')){
						return;
					}
					if($this.hasClass('ctrlFooterGrid')){
						return;
					}
					if($this.hasClass('ctrlEmailSchedule')){
						return;
					}
					clearInterval(scrollTimer);
					var currentPlaceHolder = $('.placeholder:first');
                	
					// If the control is inside an Invoice Table, we will confirm with user
					if ( (isInsideTheInvoiceTable(currentPlaceHolder) || isInsideTheGrid($this))
						&& ($this.is('.inputText') || $this.is('.inputNumeric') || $this.is('.inputTrends')) ) {
						config.dropCallback(ui.helper);
					} else if ( isInsideThePOD(currentPlaceHolder)
						&& ($this.is('.inputLabel')) ) {
						config.dropCallback(ui.helper);
					} else if($this.is('.ctrlBreakPointDataElement')){
						if(isInsideTheBreakPointData(currentPlaceHolder)){
							config.dropCallback(ui.helper);
						}else{
							currentPlaceHolder
								.addClass('closing')
								.slideUp('normal', function()
								{
									$(this).remove();
								});
							config.dropCallback(ui.helper);
						}
					} else {
						// Normal processing
						config.dropCallback(ui.helper);
					}
                }
            }, options.draggableOptions));
        });
    };

    $.fn.workspaceDraggable.defaults = {
        dragCallback: function($control, direction) {},
        draggableOptions: {},
        dropCallback: function() {},
        insertCallback: function() {},
        scrollInterval: 10,
        scrollMargin: 40,
        scrollSpeed: 10
    };
};

;(function($){
	workspace_init($);
})(jQuery);