/**
 * Project: AMDA-NG
 * Name: EpnTapUI.js
 * @class amdaUI.EpnTapUI
 * @extends Ext.tab.Panel
 * @author Nathanael JOURDANE
 * 24/10/2016: file creation
 */

// TODO: Déplacer les stores dans un fichier séparé dans js.stores !

/**
`productTypesStore`: An ExtJS Store containing the list of the different data product types defined on all granules, on
all available EPN-TAP services (defined in `generic_data/EpnTapData/metadata.json`, updated periodically with a cron
script).

This list is used to fill the `productTypeCB` combo box, which is initilized in `EpnTapModule` at the panel creation.

- `id`: the data product type IDs, according to the EPN-TAP specification (see
		https://voparis-confluence.obspm.fr/pages/viewpage.action?pageId=1148225);
- `name`: the data product name, according to the EPN-TAP specification (ibid).

These IDs and names are hard-defined in the JSon file `generic_data/EpnTapData/dataproduct_types.json`.

Notes:
- if a granule contains a data product type which is not conform to the EPN-TAP definition (ibid), it is not displayed
in this store and an information message is displayed on the JavaScript console during the panel creation.
- if a data product type is not present in any of the granules from the EPN-TAP services, it is not present in this
store.
*/
Ext.create('Ext.data.Store', {
	storeId:'productTypesStore',
	fields: ['id', 'name']
});

/**
`targetClassesStore`: An ExtJS Store containing the list of the different target classes defined on all granules, on
all available EPN-TAP services (defined in `generic_data/EpnTapData/metadata.json`, updated periodically with a cron
script), which match with the selected data product type.

This list is used to fill the `targetClassCB` combo box, which is updated by `EpnTapModule` each time a new product type
is selected.

- `id`: the target class in lowercase, with the underscore between each word;
- `name`: the target class, capitalized with spaces between each word (done `EpnTapModule.prettify()`).
*/
Ext.create('Ext.data.Store', {
	storeId:'targetClassesStore',
	fields: ['id', 'name']
});

/**
`targetNamesStore`: An ExtJS Store containing the list of the different target names defined on all granules, on
all available EPN-TAP services (defined in `generic_data/EpnTapData/metadata.json`, updated periodically with a cron
script), which match with the selected data product and target class.

This list is used to fill the `targetNameCB` combo box, which is updated by `EpnTapModule` each time a new target class
(or, by transitivity, product type) is selected.

- `id`: the target name in lowercase, with the underscore between each word;
- `name`: the target name, capitalized with spaces between each word (done `EpnTapModule.prettify()`).
*/
Ext.create('Ext.data.Store', {
	storeId: 'targetNamesStore',
	fields: ['id', 'name']
});

/**
`servicesStore`: An ExtJS Store containing the list of the EPN-TAP services (defined in
`generic_data/EpnTapData/metadata.json`, updated periodically with a cron script), which contains at least one granule
matching with the granules filter (the selected data product type, target class and target name).

This list is used to fill the `servicesGrid` table, which is updated by `EpnTapModule` each time a new target name
(or, by transitivity, target class or product type) is selected.

- `id`: the database name of the service, according to the `table_name` column from the `rr.res_table` in the
		registry database;
- `nbResults`: the number of granules matching with the granules filter for this service;
- `shortName`: the service short name, according to the `short_name` column from the `rr.resource` table in the registry
		database;
- `title`: the service title, according to the `res_title` column from the `rr.resource` table in the registry database;
- `accessURL`: the service access URL, according to the `access_url` column from the `rr.interface` table in the
		registry database.
*/
Ext.create('Ext.data.Store', {
	storeId: 'servicesStore',
	fields: ['id', 'nbResults', 'shortName', 'title', 'accessURL']
});

/**
`granulesStore`: An ExtJS Store containing the list of granules of the selected service (on `servicesGrid`), which match
with tge granules filter (the selected data product type, target class and target name).

This list is used to fill the `granulesGrid` table, which is updated by `EpnTapModule` each time a new service is
selected.

- `num`: the line number, according to the order of the query response and the current page (see `currentPageLb`);
- `dataproduct_type`: the dataproduct_type EPN-TAP parameter, as defined in
	https://voparis-confluence.obspm.fr/display/VES/EPN-TAP+V2.0+parameters.
- `target_name`: the target_name EPN-TAP parameter (ibid);
- `time_min`: the time_min EPN-TAP parameter (ibid);
- `time_max`: the time_max EPN-TAP parameter (ibid);
- `access_format`: the access_format EPN-TAP parameter (ibid);
- `granule_uid`: the granule_uid EPN-TAP parameter (ibid);
- `access_estsize`: the access_estsize EPN-TAP parameter (ibid);
- `access_url`: the access_url EPN-TAP parameter (ibid);
- `thumbnail_url`: the thumbnail_url EPN-TAP parameter (ibid).
*/
Ext.create('Ext.data.Store', {
	storeId:'granulesStore',
	fields:['num', 'dataproduct_type', 'target_name', 'time_min', 'time_max', 'access_format', 'granule_uid', 'access_estsize', 'access_url', 'thumbnail_url']
});

/**
`EpnTapUI`: The view of the AMDA EPN-TAP module, allowing the user to query and display granules information from
EPN-TAP services.

Note: The controller part of this module is defined in `js/app/controller/EpnTapModule`.
*/
Ext.define('amdaUI.EpnTapUI', {
	extend: 'Ext.panel.Panel',
	alias: 'widget.panelEpnTap',
	requires: ['amdaUI.IntervalUI'],

	/**
	Method constructor, which basically call the `init()` method to create the EpnTap panel.
	*/
	constructor: function(config) {
		this.init(config);
		this.callParent(arguments);
	},

	/**
	Create all the EpnTapPanel UI elements, and apply the AMDA module `config` (which includes the created items).

	When the panel is correctly rendered, the panel triggers `EpnTapModule.onWindowLoaded()`.

	Note: All the UI elements creation are defined as functions in this init method and not as methods in order to make
	them private (ie. to avoid `EpnTapUI.createServicesGrid();`, which doesn't make sense).
	*/
	init: function(config) {
		var mod = myDesktopApp.getLoadedModule(myDesktopApp.dynamicModules.epntap.id);

		/************
		*** Grids ***
		************/

		/**
		Create `epnTapServicesGrid`, an ExtJS grid containing the EPN-TAP services matching with the filter form
		(`serviceFilterPanel`).

		For each service, this grid displays:
		- the service name;
		- the number of granules matching with the filter.

		Other informations are available through the tooltip `serviceTooltip`.

		A click on a service triggers `EpnTapModule.onServiceSelected()`, which basically fills `GranulesGrid` by the
		service granules.
		*/
		var createServicesGrid = function() {
			return new Ext.grid.Panel({
				id: 'epnTapServicesGrid',
				title: 'Services',
				store: Ext.data.StoreManager.lookup('servicesStore'),
				flex: 1,
				columns: [
					{text: 'Name', dataIndex: 'id', flex: 3},
					{text: 'Results', dataIndex: 'nbResults', flex: 2}
				],
				renderer: function(value, metadata,record) {
					return getExpandableImage(value, metadata,record);
				},
				listeners: {
					'cellclick': function(grid, td, cellIndex, record) { mod.onServiceSelected(record.data['id']); }
				},
				renderTo: Ext.getBody()
			});
		};

		/**
		Create `epnTapServiceTooltip`, an ExtJS tooltip for the `servicesGrid` rows, in order to display additional
		information for each service, such as:
			- short name;
			- title;
			- access URL.
		*/
		var createServiceTooltip = function() {
			return new Ext.tip.ToolTip({
				id: 'epnTapServiceTooltip',
				target: Ext.getCmp('epnTapServicesGrid').getView().el,
				delegate: Ext.getCmp('epnTapServicesGrid').getView().itemSelector,
				trackMouse: true,
				listeners: {
					beforeshow: function updateTipBody(tooltip) {
						var service = Ext.getCmp('servicesGrid').getView().getRecord(tooltip.triggerElement);
						var ttContent = '<h3>' + service.get('shortName') + '</h3>';
						ttContent += '<p>' + service.get('title') + '</p>';
						ttContent += '<p>' + service.get('accessURL') + '</p>';
						tooltip.update(ttContent);
					}
				},
				renderTo: Ext.getBody()
			});
		};

		/**
		Create `epnTapGranulesGrid`, an ExtJS grid containing the granules of the selected service in
		`epnTapServiceGrid`.

		For each granule, this grid displays:
			- the row number;
			- the dataproduct type;
			- the target name;
			- the min and max times;
			- the format;
			- the UID (granule identifier);
			- the estimated size;
			- the URL;
			- the thumbnail.

		For more information about these parameters, see https://voparis-confluence.obspm.fr/display/VES/EPN-TAP+V2.0+parameters.
		Each of these information are displayed in a specific rendering to improve user experience.
		Other informations are available through the tooltip `granuleTooltip`.

		A click on a granule triggers `EpnTapModule.onGranuleSelected()`.
		*/
		var createGranulesGrid = function() {
			var txtRender = function(val) {
				return '<p style="white-space: normal;">' + val + '</p>';
			};
			var linkRender = function(val) {
				return '<a href="' + val + '">data</a>';
			};
			var imgRender = function(val) {
				return '<img width="40px height="40px" src="' + val + '">';
			};
			var dptRender = function(val) {
				return (val in mod.productTypeDict) ? '<p style="white-space: normal;">' + mod.productTypeDict[val] + '</p>' : '<em>' + val + '</em>';
			};
			var formatRender = function(val) {
				return (val in mod.mimetypeDict) ? mod.mimetypeDict[val] : '<em style="white-space: normal;">' + val + '</em>';
			};
			var sizeRender = function(val) {
				var size = parseInt(val);
				if (isNaN(size)) {
					return '';
				} else if (size >= 1024*1024) {
					return (size/(1024*1024)).toPrecision(3) + 'Go';
				} else if (size >= 1024) {
					return (size/1024).toPrecision(3) + 'Mo';
				} else {
					return size + 'Ko';
				}
			};

			return new Ext.grid.Panel({
				id: 'epnTapGranulesGrid',
				title: 'Granules',
				store: Ext.data.StoreManager.lookup('granulesStore'),
				flex: 5,
				columns: [
					{ text: 'Num',  dataIndex: 'num', flex: 1, renderer: txtRender },
					{ text: 'Type',  dataIndex: 'dataproduct_type', flex: 2, renderer: dptRender },
					{ text: 'Target', dataIndex: 'target_name', flex: 2, renderer: txtRender },
					{ text: 'Time min', dataIndex: 'time_min', flex: 2, renderer: txtRender },
					{ text: 'Time max', dataIndex: 'time_max', flex: 2, renderer: txtRender },
					{ text: 'Format', dataIndex: 'access_format', flex: 2, renderer: formatRender },
					{ text: 'uid', dataIndex: 'granule_uid', flex: 2, renderer: txtRender },
					{ text: 'Size', dataIndex: 'access_estsize', flex: 1, renderer: sizeRender },
					{ text: 'URL', dataIndex: 'access_url', flex: 1, renderer: linkRender },
					{ text: 'Thumb.', dataIndex: 'thumbnail_url', flex: 1, renderer: imgRender}
				],
				listeners: {
					'cellclick': function(grid, td, cellIndex, record) { mod.onGranuleSelected(record.data['id']); }
				},
				renderTo: Ext.getBody()
			});
		};

		/**
		Create `epnTapGranuleTooltip`, an ExtJS tooltip for the `granulesGrid` rows, in order to display additional
		information for each granule which is currently only the granule thumbnail, in full size.
		*/
		var createGranuleTooltip = function() {
			return new Ext.tip.ToolTip({
				id: 'epnTapGranuleTooltip',
				target: Ext.getCmp('granulesGrid').getView().el,
				delegate: Ext.getCmp('granulesGrid').getView().itemSelector,
				trackMouse: true,
				listeners: {
					beforeshow: function updateTipBody(tooltip) {
						var thumb = Ext.getCmp('granulesGrid').getView().getRecord(tooltip.triggerElement).get('thumbnail_url');
						tooltip.update('<img src="' + thumb + '">');
					}
				},
				renderTo: Ext.getBody()
			});
		};

		/**
		Create `epnTapGridsPanel`, an ExtJS Panel, containing `epnTapServicesGrid` and `epnTapGranulesGrid`.

		After the rendering of the grids, it triggers `epnTapModule.onWindowLoaded()`, which basically fill
		`epnTapServicesGrid` for the first time.
		*/
		var createGridsPanel = function() {
			var self = this;
			return new Ext.panel.Panel({
				id: 'epnTapGridsPanel',
				region: 'center',
				height: 350,
				layout: { type: 'hbox', pack: 'start', align: 'stretch' },
				items: [
					createServicesGrid(),
					createGranulesGrid()
				],
				listeners: {
					afterrender: function() { mod.onWindowLoaded(self); }
				}
			});
		};

		/***************************
		*** Service filter panel ***
		***************************/

		/**
		Create `epnTapProductTypeCB`, an ExtJS ComboBox, containing a list of product types as defined in
		`epnTapProductTypesStore`, which is initilized by `EpnTapModule`.

		The selection of a produt type triggers `EpnTapModule.onProductTypeCBChanged()`, which basically update
		`epnTapTargetClassCB` and `epnTapGranulesGrid`.
		*/
		var createProductTypeCB = function() {
			return new Ext.form.field.ComboBox({
				id: 'epnTapProductTypeCB',
				fieldLabel: 'Product type',
				store: Ext.data.StoreManager.lookup('productTypesStore'),
				queryMode: 'local',
				displayField: 'name',
				valueField: 'id',
				name: 'productType',
				editable: false,
				listeners: {
					'select': function(combo) { mod.onProductTypeCBChanged(combo.value); }
				}
			});
		};

		/**
		Create `epnTapTargetClassCB`, an ExtJS ComboBox, containing a list of target classes corresponding to the
		selected product type, as defined in `targetClassesStore`, which is initilized by `EpnTapModule`.

		The selection of a target class triggers the `EpnTapModule.onTargetClassCBChanged()`, which basically updates
		`targetNameCB` and `granulesGrid`.
		*/
		var createTargetClassCB = function() {
			return new Ext.form.field.ComboBox({
				id: 'epnTapTargetClassCB',
				fieldLabel: 'Target class',
				store: Ext.data.StoreManager.lookup('targetClassesStore'),
				queryMode: 'local',
				displayField: 'name',
				valueField: 'id',
				name: 'targetClass',
				editable: false,
				listeners: {
					'select': function(combo) { mod.onTargetClassCBChanged(combo.value); }
				}
			});
		};

		/**
		Create `epnTapTargetNameCB`, an ExtJS ComboBox, containing a list of target names corresponding to the selected
		target class, as defined in `targetNamesStore`, which is initilized by `EpnTapModule`.

		The selection of a target name triggers `EpnTapModule.onTargetNameCBChanged()`, which basically updates
		`granulesGrid`.
		*/
		var createTargetNameCB = function() {
			return new Ext.form.field.ComboBox({
				id: 'epnTapTargetNameCB',
				fieldLabel: 'Target name',
				store: Ext.data.StoreManager.lookup('targetNamesStore'),
				queryMode: 'local',
				displayField: 'name',
				valueField: 'id',
				name: 'targetName',
				triggerAction: 'all',
				typeAhead: true,
				mode: 'remote',
				minChars: 2,
				forceSelection: true,
				listeners: {
					'select': function(combo) { mod.onTargetNameCBChanged(combo.value); }
				}
			});
		};

		/**
		Create `epnTapServiceFilterPanel`, an ExtJS Panel containing two containers:
		- the left container, containing the combo boxes (for product type, target class and target name)
			and the navigation panel;
		- the right container, containing the time selector.
		*/
		var createServiceFilterPanel = function() {
			return new Ext.panel.Panel({
				id: 'epnTapServiceFilterPanel',
				region : 'north',
				layout: { type: 'hbox', pack: 'start', align: 'stretch' },
				defaults: { margin: 5 },
				items: [{ // Left part
					xtype : 'container',
					layout: 'form',
					flex: 2,
					items: [
						createProductTypeCB(),
						createTargetClassCB(),
						createTargetNameCB(),
						{
							xtype: 'panel',
							layout: { type: 'hbox', pack: 'start', align: 'stretch' },
							border: false,
							items: [
								createRowPerPageNf(),
								createNavigationPanel()
							]
						}
					]
				}, { // Right part
					xtype : 'form',
					id: 'epnTapIntervalSelector',
					layout: 'form',
					border: 'false',
					flex: 2,
					items: [
						createTimeSelector()
					]
				}]
			});
		};

		/**
		Create `epnTapTimeSelector`, an IntervalUI object, allowing the user to select a time interval (by filling two
		dates and/or a duration).

		See `js/app/views/IntervalUI.js` for more information about this component.
		*/
		var createTimeSelector = function() {
			return Ext.create('amdaUI.IntervalUI', {
				id: 'epnTapTimeSelector',
				durationLimit: 99999
			});
		};

		/***********************
		*** Navigation panel ***
		***********************/

		/**
		Create `epnTapRowsPerPageNf`, a ExtJS Number field, allowing the user to select the number of rows to display in
		`epnTapGranulesGrid`.

		When a new number is entered, it triggers `EpnTapModule.onRowsPerPageChanged()`.
		*/
		var createRowPerPageNf = function() {
			return new Ext.form.field.Number({
				id: 'epnTapRowsPerPageNf',
				fieldLabel: 'Rows per page',
				margin: '4 0 4 0',
				width: 160,
				height: 20,
				value: 20,
				minValue: 1,
				maxValue: 2000,
				listeners: {
					'change': function(rowPerPageNf, newValue) { mod.onRowsPerPageChanged(newValue); }
				}
			});
		};

		/**
		Create `epnTapNavigationPanel`, an ExtJSPanel containing several elements in order to navigate through the
		different pages of the query result. If the number of results is highter than the `epnTapRowsPerPageNf` field
		value, the result appears to be displayed in different pages. This panel is used to select and display the page
		number, mainly with these following elements:
		- `epnTapFirstPageBtn`: an ExtJS Button, used to come back to the first page of result,
				handling `EpnTapModule.onFirstPageBtnClicked()`;
		- `epnTapPreviousPageBtn`: an ExtJS Button, used to come back to the previous page of result,
				handling `EpnTapModule.onPreviousPageBtnClicked()`;
		- `epnTapCurrentPageLb`: an ExtJS Label, displaying the actual current page; TODO: use a Number field instead!
		- `epnTapTotalPagesLb`: an ExtJS Label, displaying the total page number of results (according to the
		`epnTapRowsPerPageNf` field value);
		- `epnTapNextPageBtn`: an ExtJS Button, used to go to the next page of result,
				handling `EpnTapModule.onNextPageBtnClicked()`;
		- `epnTapLastPageBtn`: an ExtJS Button, used to come back to the last page of result,
				handling `EpnTapModule.onLastPageBtnClicked()`.

		Note: Pages are not actually a "graphical filter": when the user navigate through the pages, a new query is send
		to the server with the corresponding range, which improves the response time on large requests.
		*/
		var createNavigationPanel = function() {
			return new Ext.panel.Panel({
				name: 'epnTapNavigationPanel',
				border: false,
				margin: '2 0 2 50',
				defaults: { margin: '0 5 0 5', width: 20, xtype: 'button', disabled: true},
				items: [{
					xtype: 'label',
					text: 'Page:'
				}, {
					id: 'epnTapFirstPageBtn',
					text: '|<',
					tooltip: 'First page',
					handler: function() { mod.onFirstPageBtnClicked(); }
				}, {
					id: 'epnTapPreviousPageBtn',
					text: '<',
					tooltip: 'Previous page',
					handler: function() { mod.onPreviousPageBtnClicked(); }
				}, {
					xtype: 'label',
					id: 'epnTapCurrentPageLb',
					tooltip: 'Current page',
					text: '-'
				}, {
					xtype: 'label',
					text: '/'
				}, {
					xtype: 'label',
					id: 'epnTapTotalPagesLb',
					tooltip: 'Total pages',
					text: '-'
				}, {
					id: 'epnTapNextPageBtn',
					text: '>',
					tooltip: 'Next page',
					handler: function() { mod.onNextPageBtnClicked(); }
				}, {
					id: 'epnTapLastPageBtn',
					text: '>|',
					tooltip: 'Last page',
					handler: function() { mod.onLastPageBtnClicked(); }
				}]
			});
		};

		/*******************
		*** Other panels ***
		*******************/

		/**
		Create `epnTapInfoPanel`, an ExtJS Panel used to display a brief user guide about how to use this module.
		*/
		var createInfoPanel = function() {
			return new Ext.panel.Panel({
				id: 'epnTapInfoPanel',
				region: 'south',
				title: 'Information',
				collapsible: true,
				flex: 0,
				height: 100,
				autoHide: false,
				bodyStyle: 'padding: 5px',
				iconCls: 'icon-information',
				loader: { autoLoad: true, url: helpDir + 'epnTapHOWTO' }
			});
		};

		// TODO tester ceci:
		// config.title = 'EPN-TAP';
		// config.layout = 'border';
		// config.items = [
		// 	createServiceFilterPanel(config.targetName),
		// 	createGridsPanel(),
		// 	createInfoPanel()
		// ];
		// Ext.apply(this, Ext.apply(arguments, config));

		var myConf = {
			width: 1000,
			height: 550,
			layout: 'border',
			items: [
				createServiceFilterPanel(),
				createGridsPanel(),
				createInfoPanel()
			]
		};
		Ext.apply(this, Ext.apply(arguments, myConf));
	}
});