/* help button pointing to an online documentation
   for components contained in a modal window
*/
/*global
  proxmoxOnlineHelpInfo
*/
Ext.define('Proxmox.button.Help', {
    extend: 'Ext.button.Button',
    xtype: 'proxmoxHelpButton',

    text: gettext('Help'),

    // make help button less flashy by styling it like toolbar buttons
    iconCls: ' x-btn-icon-el-default-toolbar-small fa fa-question-circle',
    cls: 'x-btn-default-toolbar-small proxmox-inline-button',

    hidden: true,

    listenToGlobalEvent: true,

    controller: {
	xclass: 'Ext.app.ViewController',
	listen: {
	    global: {
		proxmoxShowHelp: 'onProxmoxShowHelp',
		proxmoxHideHelp: 'onProxmoxHideHelp'
	    }
	},
	onProxmoxShowHelp: function(helpLink) {
	    var me = this.getView();
	    if (me.listenToGlobalEvent === true) {
		me.setOnlineHelp(helpLink);
		me.show();
	    }
	},
	onProxmoxHideHelp: function() {
	    var me = this.getView();
	    if (me.listenToGlobalEvent === true) {
		me.hide();
	    }
	}
    },

    getOnlineHelpInfo: function (ref) {
	var helpMap;
	if (typeof proxmoxOnlineHelpInfo !== 'undefined') {
	    helpMap = proxmoxOnlineHelpInfo;
	} else if (typeof pveOnlineHelpInfo !== 'undefined') {
	    // be backward compatible with older pve-doc-generators
	    helpMap = pveOnlineHelpInfo;
	} else {
	    throw "no global OnlineHelpInfo map declared";
	}

	return helpMap[ref];
    },

    // this sets the link and the tooltip text
    setOnlineHelp:function(blockid) {
	var me = this;

	var info = me.getOnlineHelpInfo(blockid);
	if (info) {
	    me.onlineHelp = blockid;
	    var title = info.title;
	    if (info.subtitle) {
		title += ' - ' + info.subtitle;
	    }
	    me.setTooltip(title);
	}
    },

    // helper to set the onlineHelp via a config object
    setHelpConfig: function(config) {
	var me = this;
	me.setOnlineHelp(config.onlineHelp);
    },

    handler: function() {
	var me = this;
	var docsURI;

	if (me.onlineHelp) {
	    var info = me.getOnlineHelpInfo(me.onlineHelp);
	    if (info) {
		docsURI = window.location.origin + info.link;
	    }
	}

	if (docsURI) {
	    window.open(docsURI);
	} else {
	    Ext.Msg.alert(gettext('Help'), gettext('No Help available'));
	}
    },

    initComponent: function() {
	/*jslint confusion: true */
	var me = this;

	me.callParent();

	if  (me.onlineHelp) {
	    me.setOnlineHelp(me.onlineHelp); // set tooltip
	}
    }
});