//Polyfill from https://github.com/kevlatus/polyfill-array-includes/blob/3eb7ee5/array-includes.js
if (!Array.prototype.includes) {
  Object.defineProperty(Array.prototype, 'includes', {
    value: function (searchElement, fromIndex) {

      // 1. Let O be ? ToObject(this value).
      if (this == null) {
        throw new TypeError('"this" is null or not defined');
      }

      var o = Object(this);

      // 2. Let len be ? ToLength(? Get(O, "length")).
      var len = o.length >>> 0;

      // 3. If len is 0, return false.
      if (len === 0) {
        return false;
      }

      // 4. Let n be ? ToInteger(fromIndex).
      //    (If fromIndex is undefined, this step produces the value 0.)
      var n = fromIndex | 0;

      // 5. If n ≥ 0, then
      //  a. Let k be n.
      // 6. Else n < 0,
      //  a. Let k be len + n.
      //  b. If k < 0, let k be 0.
      var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);

      function sameValueZero(x, y) {
        return x === y || (typeof x === 'number' && typeof y === 'number' && isNaN(x) && isNaN(y));
      }

      // 7. Repeat, while k < len
      while (k < len) {
        // a. Let elementK be the result of ? Get(O, ! ToString(k)).
        // b. If SameValueZero(searchElement, elementK) is true, return true.
        // c. Increase k by 1.
        if (sameValueZero(o[k], searchElement)) {
          return true;
        }
        k++;
      }

      // 8. Return false
      return false;
    }
  });
}

// It is possible that a module may have already defined the ExternalModules object
// via one more more initializeJavascriptModuleObject() calls.
if(!ExternalModules){
	var ExternalModules = {}
}

ExternalModules = $.extend(ExternalModules, {
	initModuleTable: function(){
		this.initExportModal()
		this.initImportModal()
	},

	getEnabledModulesTable: function(){
		return $('#external-modules-enabled')
	},

	initExportModal: function(){
		var modal = $('#external-modules-export-settings-modal')
		
		var initSelectAllOrNone = function(selector, value){
			modal.find(selector).click(function(){
				modal.find('input[type=checkbox]').prop('checked', value)
			})
		}

		initSelectAllOrNone('button.select-all', true)
		initSelectAllOrNone('button.deselect-all', false)
		
		var checkboxes = ''
		ExternalModules.getEnabledModulesTable().find('tr').each(function(index, row){
			row = $(row)
			checkboxes += '<br><label><input type="checkbox" name="prefixes[]" value="' + row.data('module') + '"> <b>' + row.find('.module-name').text() + '</b></label>'
		})

		var form = modal.find('form')
		form.find('.checkboxes').html(checkboxes)
		modal.find('button.export').click(function(){
			modal.modal('hide')

			ExternalModules.showLoadingDialog(ExternalModules.$lang.tt('em_manage_96'), function(){
				fetch(
					'ajax/export-settings.php?pid=' + pid,
					{
						method: 'POST',
						headers: {
							"Content-Type": "application/x-www-form-urlencoded",
						},
						body: form.serialize()
					}
				)
				.then(response => response.json())
				.then(response => {
					if(response.downloadUrl){
						location.href = response.downloadUrl + '?pid=' + pid
					}

					ExternalModules.hideLoadingDialog(function(){	
						simpleDialog(response.message)
					})
				})
			})
		})

		$('#external-modules-export-settings-button').click(function(){
			modal.modal('show')
		})
	},

	initImportModal: function(){
		var modal = $('#external-modules-import-settings-modal')
		var fileInput = modal.find('input[type=file]')
		var confirmationCheckbox = modal.find('input.confirmation-checkbox')
		var importButton = modal.find('button.import')

		confirmationCheckbox.change(function(){
			importButton.prop('disabled', !confirmationCheckbox.prop('checked'))
		})

		importButton.click(function(){
			modal.modal('hide')

			ExternalModules.showLoadingDialog(ExternalModules.$lang.tt('em_manage_111'), function(){
				var formData = new FormData();
				formData.append('redcap_csrf_token', redcap_csrf_token)
				formData.append('file', fileInput[0].files[0]);
	
				$.ajax({
					url: 'ajax/import-settings.php?pid=' + pid,
					dataType: 'json',
					data: formData,
					type: 'POST',
					contentType: false, // NEEDED, DON'T OMIT THIS (requires jQuery 1.6+)
					processData: false, // NEEDED, DON'T OMIT THIS
					success: function(data){
						ExternalModules.hideLoadingDialog(function(){
							simpleDialog(data.message)
						})
					}
				});
			})
		})

		$('#external-modules-import-settings-button').click(function(){
			fileInput.val('')
			confirmationCheckbox.prop('checked', false)
			importButton.prop('disabled', true)
			modal.modal('show')
		})
	},

	getLoadingDialog: function(){
		return $('#external-modules-loading-modal')
	},

	showLoadingDialog: function(message, afterAction){
		var dialog = ExternalModules.getLoadingDialog()
		dialog.find('.message').html(message)
		
		var spinner = dialog.find('.spinner').html('')
		spinner.html('') // remove any previous spinners
		new Spinner().spin(spinner[0])

		var handler = function (e) {
			afterAction()
			dialog.off('shown.bs.modal', handler)
		}

		dialog.on('shown.bs.modal', handler)
		dialog.modal('show')
	},

	hideLoadingDialog: function(afterAction){
		var dialog = ExternalModules.getLoadingDialog()

		var handler = function (e) {
			afterAction()
			dialog.off('hidden.bs.modal', handler)
		}

		dialog.on('hidden.bs.modal', handler)
		dialog.modal('hide')
	},

	validateSettings: function(configureModal) {
		var errorMessages = [
			this.validateDateSettings(configureModal),
			this.validateEmailSettings(configureModal)
		].filter(function(message){
			// Exclude any value that's not truthy from the array.
			return message
		})

		// Just return the first message, or null if there aren't any.
		return errorMessages[0]
	},

	validateEmailSettings: function(configureModal){
		var errorMessage = null
		configureModal.find('input.external-modules-input-element[type=email]').each(function(index, input){
			input = $(input)
			var value = input.val();
			if(value && !ExternalModules.validateEmail(value)){
				var label = input.closest('tr').find('label').text()
				//= The email address entered for the following field is not valid:
				errorMessage = ExternalModules.$lang.tt('em_errors_91') + '<br><br>' + label
			}
		})

		return errorMessage
	},

	// Taken from https://stackoverflow.com/questions/46155/how-to-validate-an-email-address-in-javascript
	validateEmail: function(email){
		var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
		return re.test(String(email).toLowerCase());
	},

	validateDateSettings: function(configureModal){
		var errorMessage = null
		configureModal.find('input.external-modules-input-element.datepicker').each(function(index, input){
			var value = $(input).val().trim()
			if(value === ''){
				return
			}

			var parts = value.split('/')
			if(parts.length === 3) {
				// parseInt() to remove leading zeros and make the types match
				var monthIndex = parseInt(parts[0]) - 1 // subtract one since Date's months are zero based
				var day = parseInt(parts[1])
				var year = parseInt(parts[2])

				var date = new Date(year, monthIndex, day)

				if (
					date.getFullYear() === year &&
					date.getMonth() === monthIndex &&
					date.getDate() === day
				) {
					// The date is valid.  Let's make sure leading zeros are included just for normalization purposes.

					var month = monthIndex+1
					if(month < 10){
						month = '0' + month
					}

					if(day < 10){
						day = '0' + day
					}

					$(input).val(month + '/' + day + '/' + year)

					return
				}
			}

			// Only support the jquery UI datepicker's default date format for now.
			//= Dates must be specified in MM/DD/YYYY format. The following value is not a valid date:
			errorMessage = ExternalModules.$lang.tt('em_errors_92') + '<br><br>' + value
		})

		return errorMessage
	},

	validateJson: function(json) {
			let $field = $(json);
			let ugly = $field.val();
			if (ugly) {
				try {
					let pretty = JSON.stringify(JSON.parse(ugly), undefined, 2);
					$field.val(pretty);
				} catch (err) {
					if (err instanceof SyntaxError) {
						alert("There is an error in your JSON syntax:\n" + err.message);
					}
				}
			}
		}
})

ExternalModules.Settings = function(){}

ExternalModules.Settings.prototype.addEscapedAttribute = function(elementHtml, name, value){
	var element = $(elementHtml)
	element.attr(name, value)

	return element[0].outerHTML
}

// Function to get the HTML for all the setting rows
ExternalModules.Settings.prototype.getSettingRows = function(configSettings, savedSettings,instance){
	var rowsHtml = '';
	var settingsObject = this;
	configSettings.forEach(function(setting){
		var setting = $.extend({}, setting);
		rowsHtml += settingsObject.getSettingColumns(setting,savedSettings,instance);
	});

	return rowsHtml;
};

ExternalModules.Settings.prototype.getSettingColumns = function(setting,savedSettings,previousInstance) {
	var settingsObject = this;
	var rowsHtml = '';

	if(typeof previousInstance === 'undefined') {
		previousInstance = [];
	}

	var thisSavedSettings = undefined
	if(!Array.isArray(savedSettings)){
		// Only try to get the setting key if the object is not an array.
		// Otherwise we could incorrectly interpret an Array function name as a setting key (like 'keys' on the Census Geocoder module).
		thisSavedSettings = savedSettings[setting.key];
	}
	
	if(typeof(ExternalModules.resetFileFields) == "undefined") {
		ExternalModules.resetFileFields = [];
	}

	if(typeof thisSavedSettings === "undefined") {
		thisSavedSettings = [{}];
	}
	else if (thisSavedSettings.value.length == 0) {
		thisSavedSettings = [{}];
	}
	else {
		thisSavedSettings = thisSavedSettings.value;
		for(var i = 0; i < previousInstance.length; i++) {
			// If this setting is currently a string because of prior saves, but now it's in a repeating sub-setting
			// make it an array
			if(typeof(thisSavedSettings) == "string" && previousInstance[i] === 0) {
				thisSavedSettings = [thisSavedSettings];
				if(setting.type == "file") {
					ExternalModules.resetFileFields.push(setting.key + "____0");
				}
			}

			if(thisSavedSettings.hasOwnProperty(previousInstance[i]) && thisSavedSettings[previousInstance[i]] !== null) {
				thisSavedSettings = thisSavedSettings[previousInstance[i]];
			}
			else {
				thisSavedSettings = [{}];
			}

		}
	}

	if(typeof thisSavedSettings === 'undefined') {
		thisSavedSettings = [{}];
	}

	if(!Array.isArray(thisSavedSettings)) {
		if(typeof thisSavedSettings === 'object'){
			// Recover from this bug: https://github.com/vanderbilt-redcap/external-module-framework/issues/616
			thisSavedSettings = Object.values(thisSavedSettings);
		}
		else{
			// Assume this value was saved before this setting was made repeatable
			thisSavedSettings = [thisSavedSettings];
		}
	}

	thisSavedSettings.forEach(function(settingValue,instance) {
		var subInstance  = previousInstance.slice();
		subInstance.push(instance);
		if(setting.type == "sub_settings") {
			rowsHtml += settingsObject.getColumnHtml(setting);
			setting.sub_settings.forEach(function(settingDetails){
				rowsHtml += settingsObject.getSettingRows([settingDetails],savedSettings,subInstance);
			});
			rowsHtml += "<tr style='display:none' class='sub_end' field='" + setting.key + "'></tr>";
		}
		else {
			if(['string', 'boolean'].indexOf(typeof settingValue) == -1) {
				settingValue = "";
			}

			rowsHtml += settingsObject.getColumnHtml(setting, settingValue);
		}
	});

	return rowsHtml;
};

ExternalModules.Settings.prototype.processBranchingLogicCondition = function(condition) {
	if (typeof condition.field === 'undefined' || typeof condition.value === 'undefined') {
		return false;
	}

	var info = ExternalModules.Settings.__branchingLogicInfo[condition.field];
	if (info.repeatable || info.type === 'sub_settings') {
		// Repeatable and sub settings fields are not supported as
		// condition fields.
		return false;
	}

	var fieldName = condition.field;
	if (info.isSubSetting) {
		// Adding suffix to fetch sub settings condition field.
		fieldName += '____0';
	}

	var $field = $('#external-modules-configure-modal [name="' + fieldName + '"]');
	if ($field.length === 0) {
		return false;
	}

	if (info.type === 'checkbox') {
		var isChecked = $field.is(':checked');
		return (isChecked && condition.value != false) || (!isChecked && condition.value == false);
	}

	if (info.type == 'radio') {
		return $field.filter('[value="' + condition.value + '"]').is(':checked');
	}

	var val = $field.val();
	var op = typeof condition.op === 'undefined' ? '=' : condition.op;
	switch (op) {
		case '=':
			return val == condition.value;
		case '>':
			return val > condition.value;
		case '>=':
			return val >= condition.value;
		case '<':
			return val < condition.value;
		case '<=':
			return val <= condition.value;
		case '<>':
		case '!=':
			return val != condition.value;
	}

	return false;
}

ExternalModules.Settings.prototype.getConfigFieldElement = function(fieldName) {
	return $('#external-modules-configure-modal [field="' + fieldName + '"]');
}

ExternalModules.Settings.prototype.hideConfigField = function(fieldName) {
	var $row = ExternalModules.Settings.prototype.getConfigFieldElement(fieldName);
	if ($row.hasClass('requiredm')) {
		$row.data('required', true);
	}

	$row.hide();
	$row.removeClass('requiredm');
}

ExternalModules.Settings.prototype.showConfigField = function(fieldName) {
	var $row = ExternalModules.Settings.prototype.getConfigFieldElement(fieldName);
	$row.show();
	if ($row.data('required')) {
		$row.addClass('requiredm');
	}
}

ExternalModules.Settings.prototype.doBranching = function(settings) {
	if (!settings) {
		var $modal = $('#external-modules-configure-modal');
		var settings = ExternalModules.configsByPrefix[$modal.data('module')];
		settings = ExternalModules.PID ? settings['project-settings'] : settings['system-settings'];

		var blInfo = {};
		settings.forEach(function(setting) {
			blInfo[setting.key] = {
				type: setting.type,
				isSubSetting: false,
				repeatable: typeof setting.repeatable === 'undefined' ? false : setting.repeatable
			};

			if (setting.type === 'sub_settings' && typeof setting.sub_settings !== false) {
				setting.sub_settings.forEach(function(subSetting) {
					blInfo[subSetting.key] = {
						type: subSetting.type,
						isSubSetting: true,
						repeatable: typeof subSetting.repeatable === 'undefined' ? false : subSetting.repeatable
					};
				});
			}
		});

		ExternalModules.Settings.__branchingLogicInfo = blInfo;
	}

	settings.forEach(function(setting) {
		if (typeof setting.branchingLogic !== 'undefined') {
			var bl = setting.branchingLogic;

			if (typeof bl.conditions === 'undefined') {
				elementVisible = ExternalModules.Settings.prototype.processBranchingLogicCondition(bl);
			}
			else {
				if (typeof bl.type === 'undefined' || bl.type.toLowerCase() !== 'or') {
					for (i = 0; i < bl.conditions.length; i++) {
						var elementVisible = true;
						if (!ExternalModules.Settings.prototype.processBranchingLogicCondition(bl.conditions[i])) {
							elementVisible = false;
							break;
						}
					}
				}
				else {
					for (i = 0; i < bl.conditions.length; i++) {
						var elementVisible = false;
						if (ExternalModules.Settings.prototype.processBranchingLogicCondition(bl.conditions[i])) {
							elementVisible = true;
							break;
						}
					}
				}
			}

			if (elementVisible) {
				ExternalModules.Settings.prototype.showConfigField(setting.key);

				if (setting.type === 'sub_settings') {
					setting.sub_settings.forEach(function(subSetting) {
						ExternalModules.Settings.prototype.showConfigField(subSetting.key);
					});
				}
			}
			else {
				ExternalModules.Settings.prototype.hideConfigField(setting.key);

				if (setting.type === 'sub_settings') {
					setting.sub_settings.forEach(function(subSetting) {
						ExternalModules.Settings.prototype.hideConfigField(subSetting.key);
					});

					return;
				}
			}
		}

		if (setting.type === 'sub_settings') {
			// Applying branching logic to sub settings.
			ExternalModules.Settings.prototype.doBranching(setting.sub_settings);
		}
	});
}

ExternalModules.Settings.prototype.addSelectedProjectIdChoiceIfNeeded = function(setting, value){
	if(value == "") {
		return
	}

	for(var i=0; i<setting.choices.length; i++){
		var choiceValue = setting.choices[i].value
		if(choiceValue == value){
			// The current user has design rights for the selected project, so it will already appear in their dropdown list.
			return
		}
	}

	// The current user does not have design rights for the selected project.
	// Add it to the list so it can be selected and displayed correctly in the config dialog.
	setting.choices.splice(1, 0, {
		value: value,
		// TODO - tt
		name: '(' + value + ') You do not have design rights for the selected project'
	});
}

ExternalModules.Settings.prototype.getColumnHtml = function(setting,value,className){
	var type = setting.type;
	var key = setting.key;

	if(setting['super-users-only'] && !ExternalModules.SUPER_USER){
		return '';
	}

	if(typeof className === "undefined") {
		className = "";
	}
	var trClass = className;
	
	var colspan = '';
	if(type == 'descriptive'){
		colspan = " colspan='3'";
	}

	var instanceLabel = "";
	if (typeof instance != "undefined") {
		instanceLabel = (instance+1)+". ";
	}
	var html = "<td></td>";
	if(type != 'sub_settings') {
		var reqLabel = '';
		if(setting.required) {
			//= * must provide value
			reqLabel = '<div class="requiredlabel">' + ExternalModules.$lang.tt('em_manage_72') + '</div>';
		}

		let settingName = setting.name
		if(setting['allow-project-overrides'] && pid === ''){
			settingName += '<br>' + ExternalModules.$lang.tt('em_manage_121')
		}

		html = "<td" + colspan + "><span class='external-modules-instance-label'>" + instanceLabel + "</span><label>" + settingName + (type == 'descriptive' ? '' : ':') + "</label>" + reqLabel + "</td>";
	}

	if (typeof instance != "undefined") {
		// for looping for repeatable elements
		if (typeof header == "undefined" && typeof value != "undefined" && value !== null) {
			value = value[instance];
		}
		key = this.getInstanceName(key, instance);
	}

	var inputHtml;
	if(['dropdown', 'field-list', 'form-list', 'event-list', 'arm-list', 'report-list', 'user-list', 'user-role-list', 'dag-list', 'dashboard-list', 'project-id'].includes(type)){
		inputHtml = this.getSelectElement(key, setting, value);
	}
	else if(type == 'textarea'){
		inputHtml = this.getTextareaElement(key, value, {"rows" : "6"});
	}
	else if(type == 'rich-text') {
		inputHtml = this.getRichTextElement(key, value);
	}
	else if(type == 'sub_settings'){
		inputHtml = "<span class='external-modules-instance-label'>"+instanceLabel+"</span><label name='"+key+"'>" + setting.name + ":</label><input type='hidden' value='true' name='key' />";
		trClass += ' sub_start sub_parent';
	}
	else if(type == 'radio'){
		inputHtml = "";
		for(var i in setting.choices ){
			var choice = setting.choices[i];

			var inputAttributes = [];
			if(choice.value == value) {
				inputAttributes["checked"] = "true";
			}

			inputHtml += this.getInputElement(type, key, choice.value, inputAttributes) + '<label>' + choice.name + '</label><br>';
		}
	}else if(type == 'button'){
		inputHtml = this.getButtonElement(type, key, setting.url.name,setting.url.value, inputAttributes);
	}
	else if(type == 'json') {
		let inputAttributes = [];
		// NOTE: Logic Editor is not available in the Control Center
		inputAttributes['onfocus'] = (typeof openLogicEditor === "function") ? "openLogicEditor($(this));" : '';
		inputAttributes['rows'] = "6";

		const json_lint_button = $("<input type='button'/>")
			  .attr("onclick", "ExternalModules.validateJson($(this).next())")
			  .attr("value", ExternalModules.$lang.tt('em_manage_135'));

		// NOTE: inserting button after getTextareaElement results in ${em_manage_135} being saved as the value
		inputHtml = json_lint_button.clone().prop('outerHTML');
		inputHtml += this.getTextareaElement(key, value, inputAttributes);
	}
	else if(type == 'custom') {
		inputHtml = this.getInputElement(type, key, value, inputAttributes);
	} else {
		var inputAttributes = [];
		if(type == 'checkbox' && value == 1){
			inputAttributes['checked'] = 'checked';
		} else if (type == 'text' && typeof setting.validation != "undefined") {
			var validation = setting.validation;
			var validation_min = (typeof setting.validation_min == "undefined") ? "" : setting.validation_min;
			var validation_max = (typeof setting.validation_max == "undefined") ? "" : setting.validation_max;
			inputAttributes['onblur'] = "redcap_validate(this,'"+validation_min+"','"+validation_max+"','soft_typed','"+validation+"',1);";
		}

		inputHtml = this.getInputElement(type, key, value, inputAttributes);
	}

	if (typeof setting.functionName !== 'undefined') {
		inputHtml += "<script type='text/javascript'>" + setting.functionName + "($('input[name=\"" + key + "\"]'));</script>";
	}
	
	if(type != 'descriptive'){
		html += "<td class='external-modules-input-td'>" + inputHtml + "</td>";
	}
	
	if(setting.required) {
		trClass += ' requiredm';
	}
	
	if(setting.repeatable) {
		// Add repeatable buttons
		html += "<td class='external-modules-add-remove-column'>";
		html += "<button class='external-modules-add-instance' setting='" + setting.key + "'>+</button>";
		html += "<button class='external-modules-remove-instance' >-</button>";
		html += "</td>";

		trClass += ' repeatable';
	}
	else {
		html += "<td></td>";
	}

	var outputHtml = "<tr" + (trClass === "" ? "" : " class='" + trClass + "'") + " field='" + setting.key + "'>" + html + "</tr>";

	return outputHtml;
};

ExternalModules.Settings.prototype.getSelectElement = function(name, setting, selectedValue){
	var choices = setting.choices
	var isProjectId = setting.type === 'project-id'
	
	var selectAttributes = {
		class: ''
	}

	if (
		isProjectId
		||
		typeof setting.autocomplete !== 'undefined' && setting.autocomplete == true
	){
		selectAttributes.class += " external-modules-autocomplete-dropdown";
	}

	if(isProjectId){
		this.addSelectedProjectIdChoiceIfNeeded(setting, selectedValue)
	}

	var optionsHtml = '';
	var choiceHasBlankValue = false;
	for(var i in choices ){
		var choice = choices[i];
		var value = choice.value;		
		if (value == '') choiceHasBlankValue = true;

		var optionAttributes = ''
		if(value == selectedValue){
			optionAttributes += 'selected'
		}

		var option = '<option ' + optionAttributes + '>' + choice.name + '</option>'
		option = this.addEscapedAttribute(option, 'value', value)

		optionsHtml += option
	}
	
	if (!choiceHasBlankValue) {
		optionsHtml = '<option value=""></option>' + optionsHtml;
	}

	var defaultAttributes = {"class" : "external-modules-input-element"};
	var attributeString = this.getElementAttributes(defaultAttributes,selectAttributes);

	return '<select ' + attributeString + ' name="' + name + '" >' + optionsHtml + '</select>';
}

ExternalModules.Settings.prototype.getInputElement = function(type, name, value, inputAttributes){
	if (typeof value == "undefined") {
		value = "";
	}

	if (type == "file") {
		if (ExternalModules.PID) {
			return this.getProjectFileFieldElement(name, value, inputAttributes);
		} else {
			return this.getSystemFileFieldElement(name, value, inputAttributes);
		}
	} else {
		var classes = 'external-modules-input-element'
		if(type === 'date'){
			// Switch the type back to text so that built-in browser date pickers aren't used.
			// We use jquery UI's datepicker instead, since it supports IE.
			type = 'text'
			classes += ' datepicker'
		}

		var input = '<input type="' + type + '" name="' + name + '" ' + this.getElementAttributes({"class":classes},inputAttributes) + '>';
		input = this.addEscapedAttribute(input, 'value', value)
		return input
	}
}

// abstracted because file fields need to be reset in multiple places
ExternalModules.Settings.prototype.getSystemFileFieldElement = function(name, value, inputAttributes) {
	return this.getFileFieldElement(name, value, inputAttributes, "");
}

// abstracted because file fields need to be reset in multiple places
ExternalModules.Settings.prototype.getProjectFileFieldElement = function(name, value, inputAttributes) {
	return this.getFileFieldElement(name, value, inputAttributes, "pid=" + ExternalModules.PID);
}

// abstracted because file fields need to be reset in multiple places
ExternalModules.Settings.prototype.getFileFieldElement = function(name, value, inputAttributes, pid) {
	var attributeString = this.getElementAttributes([],inputAttributes);
	var type = "file";
	if ((typeof value != "undefined") && (value !== "")) {
		var input = $('<input type="hidden" name="' + name + '">');
		var html = this.addEscapedAttribute(input, 'value', value);
		html += '<span class="external-modules-edoc-file"></span>';
		html += '<button class="external-modules-delete-file" '+attributeString+'>'+ExternalModules.$lang.tt('em_manage_73')+'</button>'; //= Delete File
		$.post('ajax/get-edoc-name.php?' + pid, { edoc : value }, function(data) {
			//Name starts with
			$("[name^='"+name+"'][value='"+value+"']").closest("tr").find(".external-modules-edoc-file").html("<b>" + data.doc_name + "</b><br>");
		});
		return html;
	} else {
		attributeString = this.getElementAttributes({"class":"external-modules-input-element"},inputAttributes);
		return '<input type="' + type + '" name="' + name + '" ' + attributeString + '>';
	}
}

ExternalModules.Settings.prototype.getButtonElement = function(name, value, btnname,btnvalue, inputAttributes){
	var btn = '<a name="' + value + '" class="btn btn-primary btn-sm" style="color:#fff" onclick="">'+btnname+'</a>';
    $.post('ajax/get-url.php', { pid:pid,prefix: this.getPrefix(),page:btnvalue}, function(result){
    	var data = jQuery.parseJSON(result);
        var url = data.url;
        if(data.status == 'success'){
                url = "javascript:$.post('"+data.url+"',''," + "function(result){" +
                		"var mdata = jQuery.parseJSON(result);"+
						"if(mdata.status == 'success' || mdata.status == 'warning' || mdata.status == 'danger'){"+
							"var border = '';"+
							"if(mdata.status == 'success'){border = 'border-color:#d0e9c6 !important';}"+
							"else if(mdata.status == 'warning'){border = 'border-color:#faebcc !important';}"+
							"if(mdata.message != '' && mdata.message != undefined){"+
								"$('[name ="+value+"]').parent().html( '<div class=\"alert alert-'+mdata.status+'\" style=\"margin-bottom:0;'+border+'\">'+mdata.message+'</div>')" +
							"}"+
						"}"+
					"});";
                $('[name ='+value+']').attr('onclick',url);
        }else{
        	return;
		}
    });
    return btn;
}

ExternalModules.Settings.prototype.getTextareaElement = function(name, value, inputAttributes){
	if (typeof value == "undefined") {
		value = "";
	}

	var textarea = $('<textarea contenteditable="true" name="' + name + '" ' + this.getElementAttributes([],inputAttributes) + '></textarea>');
	textarea.html(value)
	return textarea[0].outerHTML
}

ExternalModules.Settings.prototype.getRichTextElement = function(name, value) {
	if (!value) {
		value = '';
	}

	return '<textarea class="external-modules-rich-text-field" name="' + name + '">' + value + '</textarea>';
};

ExternalModules.Settings.prototype.getElementAttributes = function(defaultAttributes, additionalAttributes) {
	var attributeString = "";

	for (var tag in additionalAttributes) {
		if(defaultAttributes[tag]) {
			attributeString += tag + '="' + defaultAttributes[tag] + ' ' + additionalAttributes[tag] + '" ';
			delete defaultAttributes[tag];
		}
		else {
			attributeString += tag + '="' + additionalAttributes[tag] + '" ';
		}
	}

	for (var tag in defaultAttributes) {
		attributeString += tag + '="' + defaultAttributes[tag] + '" ';
	}

	return attributeString;
}

ExternalModules.Settings.prototype.getInstanceSymbol = function(){
	return "____";
}

ExternalModules.Settings.prototype.findSettings = function(config,name) {
	var configSettings = [config['project-settings'],config['system-settings']];
	var activeSetting = false;

	configSettings.forEach(function(configType) {
		var matchedSetting = ExternalModules.Settings.prototype.parseSettings(configType, name);

		if(matchedSetting !== false) {
			activeSetting = matchedSetting;
		}
	});

	return activeSetting;
};

ExternalModules.Settings.prototype.parseSettings = function(configType, name) {
	var activeSetting = false;
	configType.forEach(function(setting) {
		if(setting.key == name) {
			activeSetting = setting;
		}
		else if(setting.type == 'sub_settings') {
			var matchedSetting = ExternalModules.Settings.prototype.parseSettings(setting.sub_settings,name);

			if(matchedSetting !== false) {
				activeSetting = matchedSetting;
			}
		}
	});

	return activeSetting;
};

ExternalModules.Settings.prototype.getEndOfSub = function(startTr) {
	var currentTr = startTr;
	var reachedEnd = false;
	var currentDepth = 1;

	// Loop through subsequent <tr> elements until finding its end element
	while(!reachedEnd) {
		currentTr = currentTr.next();

		// If reaching end of a sub-setting, decrement depth and check if reached
		// the end of the original element
		if(currentTr.hasClass("sub_end")) {
			currentDepth--;
			reachedEnd = currentDepth < 1;
		}

		// If nested sub-setting, increment the depth counter
		if(currentTr.hasClass("sub_start")) {
			currentDepth++;
		}
	}

	return currentTr;
};

//Returns prefix. Added so it can be called globally for tinymce
ExternalModules.Settings.prototype.getPrefix = function() {
	return $('#external-modules-configure-modal').data('module');
};

ExternalModules.Settings.prototype.configureSettings = function() {
	// Reset the instances so that things will be saved correctly
	// This has to run before initializing rich text fields so that the names are correct
	this.resetConfigInstances();

	// Set up other functions that need configuration
	this.initializeRichTextFields();

	$('input.external-modules-input-element.datepicker').datepicker()

	$('input.external-modules-input-element[type=color-picker]').spectrum({
		showAlpha: true,
		allowEmpty: true,
		preferredFormat: "hex",
		chooseText: "Save",
		cancelText: "Cancel",

		// If the following is not set, the color is not actually saved on clickout (even though it looks like it is).
		clickoutFiresChange: false
	})
}

ExternalModules.Settings.prototype.resetConfigInstances = function() {
	var currentInstance = [];
	var currentFields = [];
	var lastWasEndNode = false;

	// Sync textarea and rich text divs before renaming
	tinyMCE.triggerSave();


	// Loop through each config row to find it's place in the loop
	$("#external-modules-configure-modal tr").each(function() {
		var lastField = currentFields.slice(-1);
		lastField = (lastField.length > 0 ? lastField[0] : false);

		// End current count if next node is different field
		if(lastWasEndNode) {
			if($(this).attr("field") != lastField) {
				// If there's only one instance of the previous field, hide "-" button
				if(currentInstance[currentInstance.length - 1] == 0) {
					var previousLoopField = currentFields[currentFields.length - 1];
					var currentTr = $(this).prev();

					// If merely a single repeating field
					if(!currentTr.hasClass("sub_end")) {
						currentTr.find(".external-modules-remove-instance").hide();
					}
					else {
						// Loop backwards until finding a start element matching the previousLoopField
						while((typeof currentTr !== "undefined") && !(currentTr.hasClass("sub_start") && (currentTr.attr("field") == previousLoopField))) {
							currentTr = currentTr.prev();
						}
						currentTr.find(".external-modules-remove-instance").hide();
					}
				}
				currentInstance.pop();
				currentFields.pop();
			}
		}

		// Increment or start count on current loop
		if($(this).hasClass("sub_start") || $(this).hasClass("repeatable")) {
			if(lastField == $(this).attr("field")) {
				currentInstance[currentInstance.length - 1]++;
			}
			else {
				currentInstance.push(0);
				currentFields.push($(this).attr("field"));
			}

           	if($(this).hasClass("sub_start") && currentInstance.length > 1){
                $(this).addClass("sub_child");
                $(this).removeClass("sub_parent");
    		}
		}

		lastWasEndNode = ($(this).hasClass("repeatable") && !$(this).hasClass("sub_start")) || $(this).hasClass("sub_end");

		// Update the number scheme on label and input names
		var currentLabel = "";
		var currentName = "";
		// Use PHP/JSON instance keys, so need to add one to make it look normal
		for(var i = 0; i < currentInstance.length; i++) {
			currentLabel += (currentInstance[i] + 1) + ".";
			currentName += ExternalModules.Settings.prototype.getInstanceSymbol() + currentInstance[i];
		}

		const label = $(this).find(".external-modules-instance-label")[0]
		if(label){
			label.innerHTML = currentLabel + " "
		}

		$(this).find("input, select, textarea").attr("name",$(this).attr("field") + currentName);

		// The following is required because browsers will only check the last radio button
		// if two checked radio buttons are inserted into the DOM with the same name.  For example:
		//    document.body.innerHtml = '<input type="radio" name="test" checked><input type="radio" name="test" checked>'
		// We must go back through and check them manually AFTER field names have been adjusted to account for repeatable/subsetting instances.
		$(this).find("input[type=radio][checked]").prop('checked', true)
    });
};

ExternalModules.Settings.prototype.initializeRichTextFields = function(){
	document.querySelectorAll("#external-modules-configure-modal .external-modules-autocomplete-dropdown").forEach((node) => {
		if(node.getAttribute('data-select2-id') === null){
			$(node).select2({
				dropdownParent: $('#external-modules-configure-modal')
			});
		}
		else{
			/**
			 * This dropdown has already been initialized.
			 * Do NOT reinitialize it, which becomes slow with dozens/hundreds of repeating settings.
			 */
		}
	})

	var settingsObject = this;

	// The decision to use TinyMCE was not taken lightly.  We tried integrating Quill, Trix, and Summernote as well, but they either
	// didn't work as well out of the box when placed inside the configuration model, or were not as flexible/customizable.
	var tinyLang = ExternalModules.$lang.tt('em_tinymce_language');
	if (tinyLang == null) tinyLang = 'en_US';
	// Since the corresponding en_US.js is missing in the 'tinymce/langs' directory, unset if en_US.
	if (tinyLang == "en_US") tinyLang = undefined;
	tinymce.init({
		license_key: 'gpl',
		font_family_formats: 'Open Sans=Open Sans; Andale Mono=andale mono,times; Arial=arial,helvetica,sans-serif; Arial Black=arial black,avant garde; Book Antiqua=book antiqua,palatino; Comic Sans MS=comic sans ms,sans-serif; Courier New=courier new,courier; Georgia=georgia,palatino; Helvetica=helvetica; Impact=impact,chicago; Symbol=symbol; Tahoma=tahoma,arial,helvetica,sans-serif; Terminal=terminal,monaco; Times New Roman=times new roman,times; Trebuchet MS=trebuchet ms,geneva; Verdana=verdana,geneva; Webdings=webdings; Wingdings=wingdings,zapf dingbats',
		promotion: false,
		entity_encoding: "raw",
		default_link_target: '_blank',
		selector: '.external-modules-rich-text-field',
		language: tinyLang, 
		height: 400,
		menubar: false,
		branding: false,
		elementpath: false, // Hide this, since it oddly renders below the textarea.
		plugins: 'lists link image charmap hr anchor pagebreak searchreplace code fullscreen insertdatetime media nonbreaking table directionality imagetools',
		toolbar1: 'undo redo | insert | styleselect | bold italic strikethrough alignleft aligncenter alignright alignjustify | outdent indent | bullist numlist | table | forecolor backcolor | searchreplace fullscreen code',
		toolbar_groups: {
			insert: {
				icon: 'plus',
				tooltip: 'Insert',
				items: 'link image media'
			}
		},
		relative_urls : true, // force image urls to be absolute
		document_base_url : "http://www.example.com/path1/",
		file_picker_callback: function(callback, value, meta){
			var prefix = settingsObject.getPrefix();
			tinymce.activeEditor.windowManager.openUrl({
				title: 'Files',
				url: ExternalModules.APP_URL_EXTMOD_RELATIVE + 'manager/rich-text/get-uploaded-file-list.php?prefix=' + prefix + '&pid=' + pid
			});

			ExternalModules.currentFilePickerCallback = function(url){
				tinymce.activeEditor.windowManager.close()
				callback(url)
			}
		}
	});
}

$(function(){
	var settings = new ExternalModules.Settings();

	var onValueChange = function() {
		var val;
		if (this.type == "checkbox") {
			val = $(this).is(":checked");
		} else {
			val = $(this).val();
		}

		ExternalModules.Settings.prototype.doBranching();
	};

	$('#external-modules-configure-modal').on('change', '.external-modules-input-element', onValueChange);
	$('#external-modules-configure-modal').on('check', '.external-modules-input-element', onValueChange);

	/**
	 * Function to add new elements
	 */
	$('#external-modules-configure-modal').on('click', '.external-modules-add-instance-subsettings, .external-modules-add-instance', function(){
		// Get the full configuration for the active module from the global variable
		var config = ExternalModules.configsByPrefix[configureModal.data('module')];

		// Find the setting currently being added to and its configuration
		var name = $(this).attr('setting');
		var setting = ExternalModules.Settings.prototype.findSettings(config,name);
		//console.log(config);
		//console.log(name);
		//console.log(setting);
		if(typeof setting !== "undefined") {
			// Create new html for this setting
			var html = ExternalModules.Settings.prototype.getSettingRows([setting],[{}]);

			var thisTr = $(this).closest("tr");

			if(thisTr.hasClass("sub_start")) {
				thisTr = ExternalModules.Settings.prototype.getEndOfSub(thisTr);
			}
			thisTr.after(html);
		}

		settings.configureSettings();
	});

	/**
	 * function to remove the elements
	 */
	$('#external-modules-configure-modal').on('click', '.external-modules-remove-instance-subsettings, .external-modules-remove-instance', function(){
		var startTr = $(this).closest('tr');

		// If this element is a sub_setting element, loop through until reaching the end
		// of this setting's rows
		if(startTr.hasClass("sub_start")) {
			var lastTr = ExternalModules.Settings.prototype.getEndOfSub(startTr);

			// Remove all the elements between start and end. Then remove last element.
			startTr.nextUntil(lastTr).remove();
			lastTr.remove();
		}

		// Clean up by removing the original element
		startTr.remove();

		tinymce.get().forEach(function(editor, index){
			if(!document.body.contains(editor.getElement())){
				// The element for this editor was removed from the DOM.  Destroy the editor.
				editor.remove()
			}
		})

		settings.resetConfigInstances();
	});

	// Merged from updated enabled-modules, may need to reconfigure
	ExternalModules.configsByPrefix = ExternalModules.configsByPrefixJSON;
	ExternalModules.versionsByPrefix = ExternalModules.versionsByPrefixJSON;

	var pid = ExternalModules.PID;
	var pidString = pid;
	if(pid === null){
		pidString = '';
	}
	var configureModal = $('#external-modules-configure-modal');

	$('#external-modules-enabled').on('click', '.external-modules-configure-button', function(){
		// find the module directory prefix from the <tr>
		var moduleDirectoryPrefix = $(this).closest('tr').data('module');
		configureModal.data('module', moduleDirectoryPrefix);

		var config = ExternalModules.configsByPrefix[moduleDirectoryPrefix];
		configureModal.find('.module-name').html(config.name);
		var tbody = configureModal.find('tbody');

		var loading = $('<div style="margin-top: 400px">')
		new Spinner().spin(loading[0]);
		tbody.html(loading);

		// Param list to pass to get-settings.php
		var params = {moduleDirectoryPrefix: moduleDirectoryPrefix};
		if (pid) {
			params['pid'] = pidString;
		}

		var getSettings = function(callback){
			// Get the existing values for this module through ajax
			$.get('ajax/get-settings.php', params, function(data){
				if(data.status != 'success'){
					return;
				}

				// Update the config so that the redcap_module_custom_field_configuration() hook gets applied.
				config = data.config
				ExternalModules.configsByPrefix[moduleDirectoryPrefix] = data.config

				var savedSettings = data.settings;

				// Get the html for the configuration
				var settingsHtml = "";

				if(pid) {
					settingsHtml += settings.getSettingRows(config['project-settings'], savedSettings);
				}
				else {
					settingsHtml += settings.getSettingRows(config['system-settings'], savedSettings);
				}

				// Add blank tr to end of table to make resetConfigInstances work better
				settingsHtml += "<tr style='display:none'></tr>";

				tbody.html(settingsHtml);

				callback()
			});
		}

		configureModal.on('shown.bs.modal', function () {
			configureModal.off('shown.bs.modal')

			getSettings(function(){
				settings.configureSettings();
				settings.doBranching();
			})
		})

		configureModal.modal('show');
	});

	var deleteFile = function(ob) {
		var moduleDirectoryPrefix = configureModal.data('module');

		var row = ob.closest("tr");
		var input = row.find("input[type=hidden]");
		var disabled = input.prop("disabled");
		var deleteFileButton = row.find("button.external-modules-delete-file");
		if (deleteFileButton) {
			deleteFileButton.hide();
		}

		$.post("ajax/delete-file.php?pid="+pidString, { moduleDirectoryPrefix: moduleDirectoryPrefix, key: input.attr('name'), edoc: input.val() }, function(data) {
			if (data.status == "success") {
			    console.log(JSON.stringify(data))
				var inputAttributes = "";
				if (disabled) {
					inputAttributes = "disabled";
				}
				row.find(".external-modules-edoc-file").html(settings.getProjectFileFieldElement(input.attr('name'), "", inputAttributes));
				input.remove();
			} else {		// failure
				//= The file was not able to be deleted.
				alert(ExternalModules.$lang.tt('em_errors_94')+' '+JSON.stringify(data));
			}
		});
	};
	configureModal.on('click', '.external-modules-delete-file', function() {
		deleteFile($(this));
	});

	var resetSaveButton = function() {
		if ($(this).val() != "") {
			//= Save and Upload
			$(".save").html(ExternalModules.$lang.tt('em_manage_74')); 
		}
		var allEmpty = true;
		$("input[type=file]").each(function() {
			if ($(this).val() !== "") {
				allEmpty = false;
			}
		});
		if (allEmpty) {
			//= Save
			$(".save").html(ExternalModules.$lang.tt('em_manage_13')); 
		}
	}

	configureModal.on('change', 'input[type=file]', resetSaveButton);

	// helper method for saving
	var saveFilesIfTheyExist = function(url, files, callbackWithNoArgs) {
		var lengthOfFiles = 0;
		var formData = new FormData();
		for (var name in files) {
			lengthOfFiles++;
			formData.append(name, files[name]);   // filename agnostic
		}
		
		formData.append('redcap_csrf_token', redcap_csrf_token)

		if (lengthOfFiles > 0) {
			// AJAX rather than $.post
			$.ajax({
				url: url,
				data: formData,
				processData: false,
				contentType: false,
				async: false,
				type: 'POST',
				success: function(returnData) {
					if (returnData.status != 'success') {
						//= One or more of the files could not be saved.
						alert(ExternalModules.$lang.tt('em_errors_95')+' '+JSON.stringify(returnData));
					}
					// proceed anyways to save data
					callbackWithNoArgs();
				},
				error: function(e) {
					//= One or more of the files could not be saved.
					alert(ExternalModules.$lang.tt('em_errors_95')+' '+JSON.stringify(e));
					callbackWithNoArgs();
				}
			});
		} else {
			callbackWithNoArgs();
		}
	}

	// helper method for saving
	var saveSettings = function(pidString, moduleDirectoryPrefix, version, data) {
		$.post(
			'ajax/save-settings.php?pid=' + pidString + '&moduleDirectoryPrefix=' + moduleDirectoryPrefix,
			{
				// Pass the JSON data as a form parameter instead of directly so that REDCap automatic CSRF token adding/checking/removing works properly.
				settings: JSON.stringify(data)
			}
		).done( function(returnData){
			if(returnData.status != 'success'){
				//= An error occurred while saving settings:
				alert(ExternalModules.$lang.tt('em_errors_96')+'\n\n'+returnData);
				configureModal.show();
				return;
			}

			// Reload the page reload after saving settings,
			// in case a settings affects some page behavior (like which menu items are visible).
			location.reload();
		});
	}

	configureModal.on('click', 'button.save', function(){
		var moduleDirectoryPrefix = configureModal.data('module');
		var version = ExternalModules.versionsByPrefix[moduleDirectoryPrefix];

		var errorMessage = ExternalModules.validateSettings(configureModal)
		if(errorMessage){
			simpleDialog(errorMessage, 
				//= Error
				ExternalModules.$lang.tt('em_manage_75')) 
			return
		}

		var data = {};
		var files = {};
		var requiredFieldErrors = 0;
		configureModal.find('tr.requiredm td.external-modules-input-td :input').each(function(index, element){
			let val
			if ($(this).hasClass('external-modules-rich-text-field')) {
				const id = $(this).attr('id')
				val = tinymce.get(id).getContent()
			}
			else{
				val = $(this).val()
			}

			if (val == '' && $(this).attr('type') != 'checkbox' && !$(this).is('button')) {
				requiredFieldErrors++;
			}
		});
		//= SOME SETTINGS REQUIRE A VALUE!
		//=
		//= It appears that some settings are required but are missing a value. If you wish to go back and enter more values, click CANCEL. If you wish to save the current settings, click OK.
		if (requiredFieldErrors > 0 && !confirm(ExternalModules.$lang.tt('em_manage_76'))) {
			return;
		}
		
		configureModal.hide();

		configureModal.find('input, select, textarea').each(function(index, element){
			var element = $(element);
			var name = element.attr('name');
			var type = element[0].type;

			if(!name || (type == 'radio' && !element.is(':checked'))){
				return;
			}

			if (type == 'file') {
				// We do not reach this point for previously saved file fields (is that intentional?!?!?!).
				// only store one file per variable - the first file
				jQuery.each(element[0].files, function(i, file) {
					if (typeof files[name] == "undefined") {
						files[name] = file;
					}
				});
			} else if(ExternalModules.resetFileFields.indexOf(name) !== -1) {
				var url = 'ajax/save-file.php?pid=' + pidString +
						'&moduleDirectoryPrefix=' + moduleDirectoryPrefix +
						'&moduleDirectoryVersion=' + version;

				$.ajax({
					url: url,
					data: {
						redcap_csrf_token: redcap_csrf_token,
						name: element.val()
					},
					type: 'POST',
					success: function(returnData) {
					},
					error: function(e) {
						//= Error cleaning {0}
						alert(ExternalModules.$lang.tt('em_errors_97', name)); 
					}
				});
			} else {
				var value;
				if(type == 'checkbox'){
					if(element.prop('checked')){
						value = true;
					}
					else{
						value = false;
					}
				}
				else if(element.hasClass('external-modules-rich-text-field')){
					var id = element.attr('id');
					value = tinymce.get(id).getContent();
				}
				else{
					value = element.val();
				}

				data[name] = value;
			}
		});

		var url = 'ajax/save-file.php?pid=' + pidString +
			'&moduleDirectoryPrefix=' + moduleDirectoryPrefix +
			'&moduleDirectoryVersion=' + version;
		saveFilesIfTheyExist(url, files, function() {
	         saveSettings(pidString, moduleDirectoryPrefix, version, data);
		});
	});

	configureModal.on('hidden.bs.modal', function () {
		tinymce.remove()
	})

	$('.external-modules-usage-button').click(function(){
		var row = $(this).closest('tr');
		var prefix = row.data('module')
		ExternalModules.currentPrefix = prefix
		$.get('ajax/usage.php', {prefix: prefix}, function(data){
			if(data == ''){
				data = ExternalModules.$lang.tt('em_manage_77') //= None
			}

			var modal = $('#external-modules-usage-modal')
			//= Project Usage:
			modal.find('.modal-title').html(ExternalModules.$lang.tt('em_manage_78')+'<br><b>' + row.find('.external-modules-title').text() + '</b>')
			modal.find('.modal-body .module-usage-project-list').html(data)
			modal.modal('show')
		})
	})
});
