//Some documentation
//https://developers.google.com/api-client-library/javascript/features/authentication
//https://developers.google.com/api-client-library/javascript/features/cors
//https://developers.google.com/google-apps/contacts/v3/

// loadGoogleAuth will be called once the google authentication script has
// been loaded, and we don't load the script until the document is ready so
// the body of loadGoogleAuth can assume the document is ready.
function loadGoogleAuth() {
    var btn = $("#google-auth-button");


    var handleAuth = function(authResult) {
        if (authResult && !authResult.error) {
            btn.addClass("hidden");
        } else {
            btn.removeClass("hidden");
        }
    };

    btn.on('click', function() {
        gapi.auth.authorize({client_id: btn.data("notmuch-client-id")
                            , scope: 'https://www.google.com/m8/feeds'
                            , immediate: false
                            }, handleAuth);

    });

    // Check auth on document load
    gapi.auth.authorize({client_id: btn.data("notmuch-client-id")
                        , scope: 'https://www.google.com/m8/feeds'
                        , immediate: true
                        }, handleAuth);

    var searchGoogleContacts = function(input, page, callback) {
        $.ajax({ url: 'https://www.google.com/m8/feeds/contacts/default/thin'
               , dataType: 'json'
               , data: { 'access_token' : gapi.auth.getToken().access_token
                       , q : input
                       , 'max-results' : 20
                       , 'start-index': (page-1)*20 + 1
                       , 'alt' : "json"
                       , 'v' : '3.0'
                       }
        })
        .done(function(data) {
            var num = data.feed["openSearch$totalResults"]["$t"];
            var addrs = [];
            $(data.feed.entry).each(function() {
                var name = this.title["$t"];
                if ("gd$email" in this) {
                    $(this["gd$email"]).each(function() {
                        var a = name + " <" + this.address + ">"
                        addrs.push({id: a, text: a});
                    });
                }
            });
            if (callback)
                callback({results: addrs, more: num >= 20});
            else
                console.log(addrs);
        })
        .fail(function(xhr, st, err) {
            alert("Error " + err);
        });
    };

    // Set the address book based on the dropdown
    $("#addressbooktype").change(function() {
        if ($(this).val() == 2)
            window.searchContacts = searchGoogleContacts;
    });

    if ($("#addressbooktype").val() == 2)
        window.searchContacts = searchGoogleContacts;
}

$(document).ready(function() {
    $.getScript("https://apis.google.com/js/auth.js?onload=loadGoogleAuth");
});