// $Id: ganttresourcecontroller.js 32761 2015-11-02 11:50:21Z schaap $

var ganttResourceControllerMod = angular.module('GanttResourceControllerMod', [
                                        'gantt',
                                        'gantt.sortable',
                                        'gantt.movable',
                                        'gantt.drawtask',
                                        'gantt.tooltips',
                                        'gantt.bounds',
                                        'gantt.progress',
                                        'gantt.tree',
                                        'gantt.groups',
                                        'gantt.overlap',
                                        'gantt.resizeSensor',
                                        'gantt.contextmenu']).config(['$compileProvider', function($compileProvider) {
    $compileProvider.debugInfoEnabled(false); // Remove debug info (angularJS >= 1.3)
}]);

ganttResourceControllerMod.controller('GanttResourceController', ['$scope', 'dataService', function($scope, dataService) {

    var self = this;

    $scope.dataService = dataService;
    $scope.ganttData = []
    $scope.enabled = true;

    self.taskStatusColors = dataService.taskStatusColors;
    self.resourceClaimStatusColors = dataService.resourceClaimStatusColors;

    $scope.options = {
        mode: 'custom',
        viewScale: '1 hours',
        currentDate: 'line',
        currentDateValue: $scope.dataService.lofarTime,
        columnMagnet: '1 minutes',
        timeFramesMagnet: false,
        sideMode: 'Tree',
        autoExpand: 'both',
        taskOutOfRange: 'truncate',
        api: function(api) {
            // API Object is used to control methods and events from angular-gantt.
            $scope.api = api;

            api.core.on.ready($scope, function () {
                    api.tasks.on.moveEnd($scope, moveHandler);
                    api.tasks.on.resizeEnd($scope, moveHandler);
            });

            api.directives.on.new($scope, function(directiveName, directiveScope, directiveElement) {
                if (directiveName === 'ganttRow' || directiveName === 'ganttRowLabel' ) {
                    directiveElement.bind('click', function(event) {
                        if(directiveScope.row.model.resource) {
                            $scope.dataService.selected_resource_id = directiveScope.row.model.resource.id;
                        } else if(directiveScope.row.model.resourceGroup) {
                            $scope.dataService.selected_resourceGroup_id = directiveScope.row.model.resourceGroup.id;
                        }
                    });
                } else if (directiveName === 'ganttTask') {
                    directiveElement.bind('click', function(event) {
                        if(directiveScope.task.model.raTask) {
                            if(event.ctrlKey) {
                                $scope.dataService.toggleTaskSelection(directiveScope.task.model.raTask.id);
                            } else {
                                $scope.dataService.setSelectedTaskId(directiveScope.task.model.raTask.id);
                            }
                        }
                        if(directiveScope.task.model.claim) {
                            $scope.dataService.selected_resourceClaim_id = directiveScope.task.model.claim.id;
                        }
                    });
                    directiveElement.bind('contextmenu', function(event) {
                        //search for already existing contextmenu element
                        if(directiveElement.find('#gantt-resource-context-menu').length) {
                            //found, remove it, so we can create a fresh one
                            directiveElement.find('#gantt-resource-context-menu')[0].remove();
                        }

                        //create contextmenu element
                        //with list of menu items,
                        //each with it's own action
                        var contextmenuElement = angular.element('<div id="gantt-resource-context-menu"></div>');
                        ulElement = angular.element('<ul style="z-index:10000; position:fixed; top:initial; left:initial; display:block;" role="menu" class="dropdown-menu"></ul>');
                        contextmenuElement.append(ulElement);
                        liElement = angular.element('<li><a href="#">Copy Task</a></li>');
                        ulElement.append(liElement);
                        liElement.on('click', function() {
                            $scope.dataService.copyTask(directiveScope.task.model.raTask);
                            closeContextMenu();
                        });

                        var closeContextMenu = function() {
                            contextmenuElement.remove();
                            angular.element(document).unbind('click', closeContextMenu);
                        };

                        //click anywhere to remove the contextmenu
                        angular.element(document).bind('click', closeContextMenu);

                        //add contextmenu to clicked element
                        directiveElement.append(contextmenuElement);

                        //prevent bubbling event upwards
                        return false;
                    });
                }
            });

            api.directives.on.destroy($scope, function(directiveName, directiveScope, directiveElement) {
                if (directiveName === 'ganttRow' || directiveName === 'ganttRowLabel' || directiveName === 'ganttTask') {
                    directiveElement.unbind('click');
                    directiveElement.unbind('contextmenu');
                }
            });
        }
    };

    function moveHandler(item)
    {
        var task = item.model.raTask;
        var updatedTask = {
            id: task.id,
            starttime: item.model.from._d,
            endtime: item.model.to._d
        };
        $scope.dataService.putTask(updatedTask);
    };

    function updateGanttDataAsync() {
        $scope.$evalAsync(updateGanttData);
    };

    function updateGanttData() {
        if(!dataService.initialLoadComplete) {
            return;
        }

        var ganttRowsDict = {};

        var resourceGroupsDict = $scope.dataService.resourceGroupsDict;
        var resourceGroups = $scope.dataService.resourceGroups;
        var numResourceGroups = resourceGroups.length;

        var resourceDict = $scope.dataService.resourceDict;
        var resources = $scope.dataService.resources;
        var numResources = resources.length;

        var resourceGroupMemberships = $scope.dataService.resourceGroupMemberships;

        var taskDict = $scope.dataService.filteredTaskDict;
        var numTasks = $scope.dataService.filteredTasks.length;

        var resourceClaimDict = $scope.dataService.resourceClaimDict;
        var resourceClaims = $scope.dataService.resourceClaims;
        var numResourceClaims = resourceClaims.length;

        if(numResourceGroups == 0 || numResources == 0 || !$scope.enabled){
            $scope.ganttData = [];
            return;
        }

        $scope.options.fromDate = $scope.dataService.viewTimeSpan.from;
        $scope.options.toDate = $scope.dataService.viewTimeSpan.to;
        var fullTimespanInMinutes = ($scope.options.toDate - $scope.options.fromDate) / (60 * 1000);

        if(fullTimespanInMinutes > 14*24*60) {
            $scope.options.viewScale = '1 days';
        } else if(fullTimespanInMinutes > 7*24*60) {
            $scope.options.viewScale = '6 hours';
        } else if(fullTimespanInMinutes > 2*24*60) {
            $scope.options.viewScale = '3 hours';
        } else if(fullTimespanInMinutes > 12*60) {
            $scope.options.viewScale = '1 hours';
        } else {
            $scope.options.viewScale = '10 minutes';
        }

        var editableTaskStatusIds = $scope.dataService.editableTaskStatusIds;

        //dict resourceGroup2GanttRows for fast lookup of ganttrows based on groupId
        var resourceGroup2GanttRows = {};

        // recursive method which creates ganttrows for a resourceGroup(Id),
        // and its childs, and adds the subtree to the parentRow
        var createGanttRowTree = function(groupId, parentRow) {
            var resourceGroup = resourceGroupsDict[groupId];

            if(resourceGroup) {
                var groupRowId = 'group_' + groupId;
                if(parentRow) {
                    groupRowId += '_parent' + parentRow.id;
                }

                var ganttRow = {
                    id: groupRowId,
                    parent: parentRow ? parentRow.id : null,
                    name: resourceGroup.name,
                    resourceGroup: resourceGroup,
                    tasks: []
                };

                ganttRowsDict[groupRowId] = ganttRow;

                //store ganttRow also in dict resourceGroup2GanttRows for fast lookup based on groupId
                if(!resourceGroup2GanttRows.hasOwnProperty(groupId)) {
                    resourceGroup2GanttRows[groupId] = [];
                }
                resourceGroup2GanttRows[groupId].push(ganttRow);

                //recurse over the childs
                var numChilds = resourceGroupMemberships.groups[groupId].child_ids.length;
                for(var i = 0; i < numChilds; i++) {
                    var childGroupId = resourceGroupMemberships.groups[groupId].child_ids[i];
                    createGanttRowTree(childGroupId, ganttRow);
                }
            }
        };

        //build tree of resourceGroups
        //note that one resourceGroup can be a child of multiple parents
        if(resourceGroupMemberships.hasOwnProperty('groups')) {
            var rootGroupIds = [];

            for(var groupId in resourceGroupMemberships.groups) {
                if(resourceGroupMemberships.groups[groupId].parent_ids.length == 0) {
                    rootGroupIds.push(groupId);
                }
            }

            if(rootGroupIds.length == 1)
            {
                //don't show single rootnode
                var rootChildGroupIds = resourceGroupMemberships.groups[rootGroupIds[0]].child_ids;
                for(var i = 0; i < rootChildGroupIds.length; i++) {
                    createGanttRowTree(rootChildGroupIds[i], null);
                }
            } else {
                for(var i = 0; i < rootGroupIds.length; i++) {
                    createGanttRowTree(rootGroupIds[i], null);
                }
            }
        }

        //dict resource2GanttRows for fast lookup of ganttrows based on resourceId
        var resource2GanttRows = {};

        //add resources to their parent resourceGroups
        //note that one resource can be a child of multiple parent resourceGroups
        if(resourceGroupMemberships.hasOwnProperty('resources')) {
            for(var resourceId in resourceGroupMemberships.resources) {
                var resource = resourceDict[resourceId];
                if(resource) {
                    //of which parent(s) is this resource a child?
                    var parentGroupIds = resourceGroupMemberships.resources[resourceId].parent_group_ids;

                    //loop over parents
                    //add a ganttRow for the resource to each parent ganttRow
                    for(var parentGroupId of parentGroupIds) {
                        //note that one parentResourceGroup can actually have multiple rows
                        //since each resourceGroup itself can have multiple parents
                        var parentGanttRows = resourceGroup2GanttRows[parentGroupId];

                        if(parentGanttRows) {
                            for(var parentGanttRow of parentGanttRows) {
                                var resourceGanttRowId = 'resource_' + resource.id + '_' + parentGanttRow.id;
                                var ganttRow = {
                                    id: resourceGanttRowId,
                                    parent: parentGanttRow.id,
                                    name: resource.name,
                                    tasks: [],
                                    resource: resource
                                };

                                ganttRowsDict[resourceGanttRowId] = ganttRow;

                                //store ganttRow also in dict resource2GanttRows for fast lookup based on groupId
                                if(!resource2GanttRows.hasOwnProperty(resourceId)) {
                                    resource2GanttRows[resourceId] = [];
                                }
                                resource2GanttRows[resourceId].push(ganttRow);
                            }
                        }
                    }
                }
            }
        }

        //there are also resources which are not part of a group
        //add these as well.
        for(var resourceId in resourceDict) {
            var resource = resourceDict[resourceId];

            if(!resource2GanttRows.hasOwnProperty(resourceId)) {
                var resourceGanttRowId = 'resource_' + resource.id;
                var ganttRow = {
                    id: resourceGanttRowId,
                    name: resource.name,
                    tasks: []
                };

                ganttRowsDict[resourceGanttRowId] = ganttRow;
                resource2GanttRows[resourceId] = [ganttRow];
            }
        }

        if(numResourceClaims > 0 && numTasks > 0) {
            //dict resource2Claims for fast lookup of claims based on resourceId
            var resource2Claims = {};

            //and finally assign each resourceclaim to its resource in each group
            for(var claim of resourceClaims) {
                var resourceId = claim.resource_id;
                var task = taskDict[claim.task_id];

                if(!task) {
                    continue;
                }

                if(!resource2Claims.hasOwnProperty(resourceId)) {
                    resource2Claims[resourceId] = [];
                }
                resource2Claims[resourceId].push(claim);

                var ganttRows = resource2GanttRows[resourceId];

                if(!ganttRows) {
                    continue;
                }

                for(var ganttRow of ganttRows) {
                    var claimTask = {
                        id: claim.id,
                        name: task.name,
                        from: claim.starttime,
                        to: claim.endtime,
                        color: self.resourceClaimStatusColors[claim.status],
                        classes: 'claim-task-status-' + task.status,
                        raTask: task,
                        claim: claim,
                        movable: $.inArray(task.status_id, editableTaskStatusIds) > -1
                    };

                    if(claim.id == dataService.selected_resourceClaim_id) {
                        claimTask.classes += ' claim-selected-claim';
                    } else if(dataService.isTaskIdSelected(task.id)) {
                        claimTask.classes += ' claim-selected-task';
                    }

                    ganttRow.tasks.push(claimTask);
                }
            }

            // recursive method which aggregates the properties of the descendants tree
            var aggregateDescendants = function(groupId) {
                var aggregatedClaims = {};

                var resourceIds = resourceGroupMemberships.groups[groupId].resource_ids;

                for(var resourceId of resourceIds) {
                    var claims = resource2Claims[resourceId];

                    if(claims) {
                        for(var claim of claims) {
                            var taskId = claim.task_id;
                            var task = taskDict[taskId];
                            if(taskId in aggregatedClaims) {
                                if(claim.starttime < aggregatedClaims[taskId].starttime) {
                                    aggregatedClaims[taskId].starttime = claim.starttime.getTime() > task.starttime.getTime() ? claim.starttime : task.starttime;
                                }
                                if(claim.endtime > aggregatedClaims[taskId].endtime) {
                                    aggregatedClaims[taskId].endtime = claim.endtime.getTime() < task.endtime.getTime() ? claim.endtime: task.endtime;
                                }
                                if(claim.status == 'conflict') {
                                    aggregatedClaims[taskId].status = 'conflict';
                                } else if(claim.status != aggregatedClaims[taskId].status && aggregatedClaims[taskId].status != 'conflict') {
                                    aggregatedClaims[taskId].status = 'mixed';
                                }
                            } else {
                                aggregatedClaims[taskId] = { starttime: claim.starttime,
                                                             endtime: claim.endtime,
                                                             status: claim.status
                                };
                            }
                        }
                    }
                }

                var childGroupIds = resourceGroupMemberships.groups[groupId].child_ids;

                for(var childGroupId of childGroupIds) {

                    var subAggregatedClaims = aggregateDescendants(childGroupId);

                    for(var taskId in subAggregatedClaims) {
                        var subAggregatedClaim = subAggregatedClaims[taskId];
                        if(taskId in aggregatedClaims) {
                            if(subAggregatedClaim.starttime < aggregatedClaims[taskId].starttime) {
                                aggregatedClaims[taskId].starttime = subAggregatedClaim.starttime;
                            }
                            if(subAggregatedClaim.endtime > aggregatedClaims[taskId].endtime) {
                                aggregatedClaims[taskId].endtime = subAggregatedClaim.endtime;
                            }
                            if(subAggregatedClaim.status == 'conflict') {
                                aggregatedClaims[taskId].status = 'conflict';
                            } else if(subAggregatedClaim.status != aggregatedClaims[taskId].status && aggregatedClaims[taskId].status != 'conflict') {
                                aggregatedClaims[taskId].status = 'mixed';
                            }
                        } else {
                            aggregatedClaims[taskId] = { starttime: subAggregatedClaim.starttime,
                                                         endtime: subAggregatedClaim.endtime,
                                                         status: subAggregatedClaim.status };
                        }
                    }
                }

                var ganttRows = resourceGroup2GanttRows[groupId];
                if(ganttRows) {
                    for(var ganttRow of ganttRows) {
                        for(var taskId in aggregatedClaims) {
                            var aggClaimForTask = aggregatedClaims[taskId];
                            var task = taskDict[taskId];
                            if(task) {
                                var claimTask = {
                                    id: 'aggregatedClaimForTask_' + taskId + '_' + ganttRow.id,
                                    name: task.name,
                                    from: aggClaimForTask.starttime,
                                    to: aggClaimForTask.endtime,
                                    color: self.resourceClaimStatusColors[aggClaimForTask.status],
                                    classes: 'claim-task-status-' + task.status,
                                    raTask: task,
                                    movable: $.inArray(task.status_id, editableTaskStatusIds) > -1
                                };

                                if(dataService.isTaskIdSelected(task.id)) {
                                    claimTask.classes += ' claim-selected-task';
                                }

                                ganttRow.tasks.push(claimTask);
                            }
                        }
                    }
                }
                return aggregatedClaims;
            };

            //now that the whole tree has been built,
            //and all resourceClaims are processed
            //loop over the root resourceGroup again
            //and aggregate the claims of the subtrees
            if(resourceGroupMemberships.hasOwnProperty('groups')) {
                for(var groupId in resourceGroupMemberships.groups) {
                    if(resourceGroupMemberships.groups[groupId].parent_ids.length == 0) {
                        //resourceGroup is a root item (no parents)
                        //aggregate the claims of the subtrees
                        aggregateDescendants(groupId);
                    }
                }
            }
        }

        var ganttRows = [];

        for (var rowId in ganttRowsDict)
            ganttRows.push(ganttRowsDict[rowId]);

        $scope.ganttData = ganttRows;
    };

    $scope.$watch('dataService.initialLoadComplete', updateGanttDataAsync);
    $scope.$watch('dataService.selected_task_ids', updateGanttDataAsync, true);
    $scope.$watch('dataService.viewTimeSpan', updateGanttDataAsync, true);
    $scope.$watch('dataService.claimChangeCntr', updateGanttDataAsync);
    $scope.$watch('dataService.filteredTaskChangeCntr', updateGanttDataAsync);
    $scope.$watch('enabled', updateGanttDataAsync);
    $scope.$watch('dataService.lofarTime', function() {
        $scope.$evalAsync(function() {
            if($scope.dataService.lofarTime.getSeconds() % 10 == 0) {
                $scope.options.currentDateValue= $scope.dataService.lofarTime;}
        });
    });
}
]);