//
// Carnegie Mellon Univerity, Human Computer Interaction Institute
// Copyright 2005
// All Rights Reserved
//
// Author: Benjamin Billings
// Version: $Revision: 1.28 $
// Last modified by: $Author: alida $
// Last modified on: $Date: 2009/08/19 19:47:47 $
// $KeyWordsOff: $
//

/** Observers which will be invoked when the field is updated */
var problemObserver = new Observer("problemUpdate");
var sampleObserver = new Observer("sampleUpdate");
var skillObserver = new Observer("skillUpdate");
var studentObserver = new Observer("studentUpdate");

/** UI Lists */
var problemList = null;
var skillList = null;
var studentList = null;
var modelList = null;

/** Initialize all necessary Lists and listeners */
function initDefaultNavigation(problemMultiSelect) {
    
    if (problemMultiSelect !== false) { problemMultiSelect = true; }

    if ($('samples')) { new NavigationBox.Base("samples"); }

    if ($('problems')) {
        var options = {multiSelect:problemMultiSelect, observer:problemObserver, itemInfo:true};
        problemList = new NavigationBox.Component(
                   "problems", "Problems", window.location.pathname, options);
    	sampleObserver.addListener(refreshProblemList);  
    }

    if ($('skills')) {
        var options = {multiSelect:true, observer:skillObserver};
        skillList = new NavigationBox.Component(
                   "skills", "Knowledge Components", window.location.pathname, options);
    	sampleObserver.addListener(refreshSkillList);  
        //look at the first H2 which is the title and insert the wrench icon
        $("skills").down('span').insert({before : '<span id="navManageKCsetsButton" title="Add, edit, or load KC sets" class="wrench"></span>'});
    }
    
    if ($('students')) {
        var options = {multiSelect:true, observer:studentObserver};
        studentList = new NavigationBox.Component(
                   "students", "Students", window.location.pathname, options);
    	sampleObserver.addListener(refreshStudentList);  
    }
    
    if ($('skillModels')) {
        modelList = new SkillModelList($("skillModels"), false);
    }
}

function refreshProblemList() {
    problemList.refreshList();
}

function refreshSkillList() {
    skillList.refreshList();
}

function refreshStudentList() {
    studentList.refreshList();
}


/* Makes a call to select the sample as a full page refresh */
function selectSample(sampleId) {
	if (sampleId != null) {
		var sampleSelectForm = document.createElement('FORM');
		sampleSelectForm.setAttribute('name', 'sample_select_form');
		sampleSelectForm.setAttribute('id', 'sample_select_form');
		sampleSelectForm.setAttribute('form', 'text/plain');
		sampleSelectForm.setAttribute('action', window.location.href);
		sampleSelectForm.setAttribute('method', 'POST');
	
		var sampleIdInput = document.createElement('input');
		sampleIdInput.name="sampleId";
		sampleIdInput.type="hidden";
		sampleIdInput.value=sampleId;
		sampleSelectForm.appendChild(sampleIdInput);

		document.getElementsByTagName('body').item(0).appendChild(sampleSelectForm);
		sampleSelectForm.submit();
	}
}

function refreshSampleList(sampleId) {	
	//build the parameters string
	/* Want a full page refresh and not just an ajax request.
	var postParams = { 
                requestingMethod: "Navigation.refreshSampleList",
                datasetId: dataset,
		sampleListRefresh: "true"
		}
	if (sampleId != null) {
		postParams['updatedSample'] = sampleId;
	}

	new Ajax.Request(window.location.href, {
		parameters: postParams,
		onComplete: processSampleRefresh,
		onException: function (request, exception) {
			throw(exception);
		}
	});
	*/
	
	var sampleSelectForm = document.createElement('FORM');
	sampleSelectForm.setAttribute('name', 'sample_select_form');
	sampleSelectForm.setAttribute('id', 'sample_select_form');
	sampleSelectForm.setAttribute('form', 'text/plain');
	sampleSelectForm.setAttribute('action', window.location.href);
	sampleSelectForm.setAttribute('method', 'POST');
	
	var datasetIdInput = document.createElement('input');
	datasetIdInput.name="datasetId";
	datasetIdInput.type="hidden";
	datasetIdInput.value=dataset;
	sampleSelectForm.appendChild(datasetIdInput);

	var sampleListRefreshInput = document.createElement('input');
	sampleListRefreshInput.name="sampleListRefresh";
	sampleListRefreshInput.type="hidden";
	sampleListRefreshInput.value="true";
	sampleSelectForm.appendChild(sampleListRefreshInput);
	
	if (sampleId != null) {
	    var updatedSampleInput = document.createElement('input');
	    updatedSampleInput.name="updatedSample";
	    updatedSampleInput.type="hidden";
	    updatedSampleInput.value=sampleId;
	    sampleSelectForm.appendChild(updatedSampleInput);
	}

	document.getElementsByTagName('body').item(0).appendChild(sampleSelectForm);
	sampleSelectForm.submit();
}

function processSampleRefresh(transport) {
	var sampleDiv = document.getElementById('samples');
	response = transport.responseText.evalJSON();
	sampleDiv.innerHTML = response.sampleNavDiv;
	var contentSampleNameElement = $("contentSampleName");
	if (contentSampleNameElement) {
	    contentSampleNameElement.innerHTML = "Sample(s): " + response.sampleNames; 
	} else {
	    var contentBoxElement = $("contentHeaderCol1");
	    if (contentBoxElement) {
	        var newH1 = "<h1 id=\"contentSampleName\" class=\"samplename\">Sample(s): "
	                + response.sampleNames + "</h1>";
	        contentBoxElement.insert(newH1);
	    }
	}
	sampleObserver.invoke();
}

function selectSkillModel() {
	var modelSelector = document.getElementById("skill_model_select");
	var modelId = modelSelector.options[modelSelector.selectedIndex].value;

	if (modelId != null) {
		var newForm = document.createElement('FORM');
		newForm.setAttribute('name', 'skill_model_select_form');
		newForm.setAttribute('id', 'skill_model_select_form');
		newForm.setAttribute('form', 'text/plain');
		newForm.setAttribute('action', window.location.pathname);
		newForm.setAttribute('method', 'POST');
	
		var newInput = document.createElement('input');
		newInput.name="skillModelId";
		newInput.type="hidden";
		newInput.value=modelId;
		
		newForm.appendChild(newInput);
		
		document.getElementsByTagName('body').item(0).appendChild(newForm);
		newForm.submit();
	}
}

function selectSecondarySkillModel() {
    var modelSelector = document.getElementById("secondary_skill_model_select");
	var modelId = modelSelector.options[modelSelector.selectedIndex].value;

	if (modelId != null) {
		var newForm = document.createElement('FORM');
		newForm.setAttribute('name', 'secondary_skill_model_select_form');
		newForm.setAttribute('id', 'secondary_skill_model_select_form');
		newForm.setAttribute('form', 'text/plain');
		newForm.setAttribute('action', window.location.pathname);
		newForm.setAttribute('method', 'POST');
	
		var newInput = document.createElement('input');
		newInput.name="secondarySkillModelId";
		newInput.type="hidden";
		newInput.value=modelId;
		
		newForm.appendChild(newInput);
		
		document.getElementsByTagName('body').item(0).appendChild(newForm);
		newForm.submit();
	}
}