/*
Simple OpenID Connect Plugin
Adapted from http://code.google.com/p/openid-selector/

The original code is licenced under the New BSD License.
*/

var providers = {
	google: {
		name: 'Google',
	}		
};

var openid = {

    cookie_expires: 6*30, // 6 months.
    cookie_name: 'openid_provider',
    cookie_path: '/',
	
    img_path: 'openid_connect/images/',
	
    input_id: "openid_provider",
	
    init: function(input_id) {
        
        var openid_btns = $('#openid_btns');
        
        this.input_id = input_id;
        
        $('#openid_choice').show();
        $('#openid_input_area').empty();
        
        // add box for each provider
        for (id in providers) {
           	openid_btns.append(this.getBoxHTML(id, providers[id]));
        }
        
      	$('#openid_form').submit(this.submit);
        
        var box_id = this.readCookie();
       	if (box_id) {
        	this.highlight(box_id);
		var provider = providers[box_id];
	}  
    },
    getBoxHTML: function(box_id, provider) {
	var image_filename = box_id + ".gif";
	var box_name = box_id;    
	if (provider['image_filename']) {
		image_filename = provider['image_filename'];
	}
	if (provider['name']) {
                box_name = provider['name'];
        }	
        return '<a title="'+box_name+'" href="javascript: openid.signin(\''+ id +'\');"' +
        		' style="background: #FFF url(' + this.img_path + image_filename + ') no-repeat center center" ' + 
        		'class="' + box_id + ' openid_large_btn"></a>';    
    
    },
    /* Provider image click */
    signin: function(box_id, onload) {
		this.highlight(box_id);
		this.setCookie(box_id);
		this.setOpenIdProvider(box_id);
		if (!onload) {
			$('#openid_form').submit();
		}	
    },
    setOpenIdProvider: function (provider) {
    
    	var hidden = $('#'+this.input_id);
    	if (hidden.length > 0) {
    		hidden.value = provider;
    	} else {
    		$('#openid_form').append('<input type="hidden" id="' + this.input_id + '" name="' + this.input_id + '" value="'+provider+'"/>');
    	}
    },
    highlight: function (box_id) {
    	
    	// remove previous highlight.
    	var highlight = $('#openid_highlight');
    	if (highlight) {
    		highlight.replaceWith($('#openid_highlight a')[0]);
    	}
    	// add new highlight.
    	$('.'+box_id).wrap('<div id="openid_highlight"></div>');
    },
    setCookie: function (value) {
    
		var date = new Date();
		date.setTime(date.getTime()+(this.cookie_expires*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
		
		document.cookie = this.cookie_name+"="+value+expires+"; path=" + this.cookie_path;
    },
    readCookie: function () {
		var nameEQ = this.cookie_name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
    }
};