/*
 * Copyright 2012 LinkedIn Corp.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

$.namespace('azkaban');

var flowTableView;
azkaban.FlowTableView = Backbone.View.extend({
	events : {
		"click .flow-expander": "expandFlowProject",
		"mouseover .expanded-flow-job-list li": "highlight",
		"mouseout .expanded-flow-job-list li": "unhighlight",
		"click .runJob": "runJob",
		"click .runWithDep": "runWithDep",
		"click .execute-flow": "executeFlow",
		"click .viewFlow": "viewFlow",
		"click .viewJob": "viewJob"
	},

	initialize: function(settings) {
	},

	expandFlowProject: function(evt) {
		if (evt.target.tagName == "A" || evt.target.tagName == "BUTTON") {
			return;
		}
		
		var target = evt.currentTarget;
		var targetId = target.id;
		var requestURL = contextURL + "/manager";

		var targetExpanded = $('#' + targetId + '-child');
		var targetTBody = $('#' + targetId + '-tbody');
		
		var createJobListFunction = this.createJobListTable;
		if (target.loading) {
			console.log("Still loading.");
		}
		else if (target.loaded) {
			$(targetExpanded).collapse('toggle');
			var expander = $(target).children('.flow-expander-icon')[0];
			if ($(expander).hasClass('glyphicon-chevron-down')) {
				$(expander).removeClass('glyphicon-chevron-down');
				$(expander).addClass('glyphicon-chevron-up');
			}
			else {
				$(expander).removeClass('glyphicon-chevron-up');
				$(expander).addClass('glyphicon-chevron-down');
			}
		}
		else {
			// projectName is available
			target.loading = true;
			var requestData = {
				"project": projectName, 
				"ajax": "fetchflowjobs", 
				"flow": targetId
			};
			var successHandler = function(data) {
				console.log("Success");
				target.loaded = true;
				target.loading = false;
				createJobListFunction(data, targetTBody);
				$(targetExpanded).collapse('show');
				var expander = $(target).children('.flow-expander-icon')[0];
				$(expander).removeClass('glyphicon-chevron-down');
				$(expander).addClass('glyphicon-chevron-up');
			};
			$.get(requestURL, requestData, successHandler, "json");
		}
	},
	
	createJobListTable: function(data, innerTable) {
		var nodes = data.nodes;
		var flowId = data.flowId;
		var project = data.project;
		var requestURL = contextURL + "/manager?project=" + project + "&flow=" + flowId + "&job=";
		for (var i = 0; i < nodes.length; i++) {
			var job = nodes[i];
			var name = job.id;
			var level = job.level;
			var nodeId = flowId + "-" + name;
	
			var li = document.createElement('li');
			$(li).addClass("list-group-item");
			$(li).attr("id", nodeId);
			li.flowId = flowId;
			li.dependents = job.dependents;
			li.dependencies = job.dependencies;
			li.projectName = project;
			li.jobName = name;

			if (execAccess) {
				var hoverMenuDiv = document.createElement('div');
				$(hoverMenuDiv).addClass('pull-right');
				$(hoverMenuDiv).addClass('job-buttons');
				
				var divRunJob = document.createElement('button');
				$(divRunJob).attr('type', 'button');
				$(divRunJob).addClass("btn");
				$(divRunJob).addClass("btn-success");
				$(divRunJob).addClass("btn-xs");
				$(divRunJob).addClass("runJob");
				$(divRunJob).text("Run Job");
				divRunJob.jobName = name;
				divRunJob.flowId = flowId;
				$(hoverMenuDiv).append(divRunJob);
				
				var divRunWithDep = document.createElement("button");
				$(divRunWithDep).attr('type', 'button');
				$(divRunWithDep).addClass("btn");
				$(divRunWithDep).addClass("btn-success");
				$(divRunWithDep).addClass("btn-xs");
				$(divRunWithDep).addClass("runWithDep");
				$(divRunWithDep).text("Run With Dependencies");
				divRunWithDep.jobName = name;
				divRunWithDep.flowId = flowId;
				$(hoverMenuDiv).append(divRunWithDep);
				
				$(li).append(hoverMenuDiv);
			}
			
			var ida = document.createElement("a");
			$(ida).css("margin-left", level * 20);
			$(ida).attr("href", requestURL + name);
			$(ida).text(name);

			$(li).append(ida);
			$(innerTable).append(li);
		}
	},
	
	unhighlight: function(evt) {
		var currentTarget = evt.currentTarget;
		$(".dependent").removeClass("dependent");
		$(".dependency").removeClass("dependency");
	},

	highlight: function(evt) {
		var currentTarget = evt.currentTarget;
		$(".dependent").removeClass("dependent");
		$(".dependency").removeClass("dependency");
		this.highlightJob(currentTarget);
	},

	highlightJob: function(currentTarget) {
		var dependents = currentTarget.dependents;
		var dependencies = currentTarget.dependencies;
		var flowid = currentTarget.flowId;
		
		if (dependents) {
			for (var i = 0; i < dependents.length; ++i) {
				var depId = flowid + "-" + dependents[i];
				$("#"+depId).toggleClass("dependent");
			}
		}
		
		if (dependencies) {
			for (var i = 0; i < dependencies.length; ++i) {
				var depId = flowid + "-" + dependencies[i];
				$("#"+depId).toggleClass("dependency");
			}
		}
	},

	viewFlow: function(evt) {
		console.log("View Flow");
		var flowId = evt.currentTarget.flowId;
		location.href = contextURL + "/manager?project=" + projectName + "&flow=" + flowId;
	},

	viewJob: function(evt) {
		console.log("View Job");
		var flowId = evt.currentTarget.flowId;
		var jobId = evt.currentTarget.jobId;
		location.href = contextURL + "/manager?project=" + projectName + "&flow=" + flowId + "&job=" + jobId;
	},

	runJob: function(evt) {
		console.log("Run Job");
		var jobId = evt.currentTarget.jobName;
		var flowId = evt.currentTarget.flowId;
		
		var executingData = {
			project: projectName,
			ajax: "executeFlow",
			flow: flowId,
			job: jobId
		};
		
		this.executeFlowDialog(executingData);
	},

	runWithDep: function(evt) {
		var jobId = evt.currentTarget.jobName;
		var flowId = evt.currentTarget.flowId;
		console.log("Run With Dep");
		
		var executingData = {
			project: projectName,
			ajax: "executeFlow",
			flow: flowId,
			job: jobId,
			withDep: true
		};
		this.executeFlowDialog(executingData);
	},

	executeFlow: function(evt) {
		console.log("Execute Flow");
		var flowId = $(evt.currentTarget).attr('flowid');
		
		var executingData = {
			project: projectName,
			ajax: "executeFlow",
			flow: flowId
		};
		
		this.executeFlowDialog(executingData);
	},

	executeFlowDialog: function(executingData) {
		flowExecuteDialogView.show(executingData);
	},

	render: function() {
	}
});

$(function() {
	flowTableView = new azkaban.FlowTableView({el:$('#flow-tabs')});
});
