// TimeStamper namespace
var TS = {};

/* Setup after the document is ready for manipulation. */
$(document).ready(function(){

    // ======== DEFINE MODELS ========//

    /* Entry model.
     * Attributes
     *  - id
     *  - mark
     *  - notes
     *  - start
     */
    TS.EntryModel = Backbone.Model.extend({

    });

    /* Timeline model.
     * Attributes:
     *  - id
     *  - desc
     *  - created
     */
    TS.TimelineModel = Backbone.Model.extend({

    });

    /* User model.
     * Attributes:
     *  - username
     *  - fullname
     *  - email
     *  - join_date
     */
    TS.UserModel = Backbone.Model.extend({

    });

    TS.EntryList = Backbone.Collection.extend({
        model: TS.EntryModel,
        
        comparator: function(entry) { return entry.get('timestamp'); },

        initialize: function(model, options) {
            if (options.timeline == undefined) {
                throw "Cannot create an EntryList without a TimelineModel reference."
            } else { this.timeline = options.timeline; }

            _.bindAll(this, "url");
        },

        url: function() {
            return "/entries/" + this.timeline.get('user_id') + "/" + this.timeline.get('id');
        }
    });

    TS.TimelineList = Backbone.Collection.extend({
        model: TS.TimelineModel,

        initialize: function(models, options) {
            if (options.user == undefined) {
                throw "Cannot create a TimelineList without a UserModel reference.";
            } else { this.user = options.user; }

            _.bindAll(this, 'url');
        },

        url: function() {
            return "/ts_api/timelines/" + this.user.get('id');
        }
    });


    // ======== DEFINE VIEWS ========//

    /* Entry view
     */
    TS.EntryView = Backbone.View.extend({

        model: TS.EntryModel,

        events: {
            "dblclick div.mark"         : "editMark",
            "dblclick div.timestamp"    : "editTimestamp",
            "keypress .mark-input"      : "updateOnEnter"
            "keypress .timestamp-input" : "updateOnEnter"
        },

        initialize: function() {
            _.bindAll(this, 'render', 'close');
            this.model.bind('change', this.render);
            this.model.view = this;
        },

        render: function() {
            $(this.el).html(ich.entry(this.model.toJSON()));
            return this;
        },

        editMark: function() {
            $(this.el).addClass('edit-mark');
            this.$('.mark-input').focus();
            return this;
        },

        editTimestamp: function() {
            $(this.el).addClass('edit-timestamp');
            this.$('timestamp-input').focus();
            return this;
        },

        close: function() {
            this.model.save({
                mark: this.$('.mark-input').val(), 
                timestamp: this.$('.timestamp-input').val()});
            $(this.el).removeClass('edit-mark edit-timestamp');
        },

        updateOnEnter: function(e) {
            if(e.keyCode == 13) this.close();
        }
    });

    TS.EntryListView = Backbone.View.extend({
        
        el: $("#entries"),

        initialize: function() {
            _.bindAll(this, 'addOne', 'render');
            this.collection.bind('add', this.addOne);
            this.collection.bind('refresh', this.render);
            this.collection.view = this;
        },

        addOne: function(entry) {
            $(this.el).append(entry.view.render().el);
        },

        render: function() {
            $(this.el).empty();
            this.collection.each(this.addOne);
        }
    });

    TS.TimelineView = Backbone.View.extend({

        el: $("#timeline"),

        model: TS.TimelineModel,

        events: {
            "dblclick .timeline-id"         : "editId",
            "dblclick .timeline-desc"       : "editDesc",
            "keypress .timeline-id-input"   : "updateOnEnter",
            "keypress .timeline-desc-input" : "updateOnEnter"
        },

        initialize: function() {
            _.bindAll(this, 'render', 'close', 'editId', 'editDesc',
                'updateOnEnter');
            this.model.bind('change', this.render);
            this.model.view = this;
        },

        render: function() {
            this.$('.timeline-id').html('( ' +
                this.model.get('id') + ' )');
            this.$('.timeline-desc').text(this.model.get('desc'));
            return this;
        },

        editId: function() {
            $(this.el).addClass('edit-id');
            this.$('.timeline-id-input').focus();
            return this;
        },

        editDesc: function() {
            $(this.el).addClass('edit-desc');
            this.$('.timeline-desc-input').focus();
            return this;
        };

        close: function() {
            this.model.save({
                id: this.$('timeline-id-input').val(),
                desc: this.$('.timeline-desc-input').val()});
            $(this.el).removeClass('.edit-id .edit-desc');
        },

        updateOnEnter: function(e) {
            if (e.keyCode == 13) this.close();
        }
    });

    TS.TimelineListView = Backbone.View.extend({

        el: $("#timeline .drop-menu-items"),

        events: {
            'click #timeline .drop-menu-items a':   'selectTimeline'
        },

        initialize: function() {
            _.bindAll(this, 'addOne', 'render');
            this.collection.bind('add', this.addOne);
            this.collection.bind('refresh', this.refresh);
            this.collection.view = this;
        },

        addOne: function(timeline) {
            $(this.el).append(ich.timelineLink(timeline.toJSON()));
        },

        render: function() {
            $(this.el).empty();
            this.collection.each(this.addOne);
            return this;
        },

        selectTimeline: function() {
            // note that this refers to the element that initiated this event
            // TODO
        }
    });

    TS.UserView = Backbone.View.extend({
        
        el: $("user"),

        model: TS.UserModel,

        events: {
            'dblclick .fullname':       'editFullname',
            'keypress .fullname-input': 'updateOnEnter'
        },

        initialize: function() {
            _.bindAll(this, 'render', 'close', 'editFullname', 'updateOnEnter');
            this.model.bind('change', this.render);
            this.model.view = this;
        },

        render: function() {
            this.$('.fullname').text(this.model.get('name'));
            this.$('.username').text(this.model.get('id'));
            return this;
        },

        editFullname: function() {
            $(this.el).addClass('.edit-fullname');
            this.$('.fullname-input').focus();
            return this;
        },

        close: function() {
            this.model.set({name: this.$('.fullname-input').val()});
            this.model.save();
            $(this.el).removeClass('.edit-fullname');
        },

        updateOnEnter: function(e) {
            if (keyCode == 13) this.close();
        }
    });

})

function login() {
    // lookup the login dialog elements
    var name = $("#login-name");
    var pwd = $("#login-password");

    // call the API via AJAX
    $.ajax({
        url: "/ts_api/login",
        processData: false,
        data: JSON.stringify({username: name.val(), password: pwd.val()}),
        type: "POST",

        error: function(jqXHR, textStatus, error) {
            // assuming bad credentials (possible server error or bad request,
            // we should check that, FIXME
            var tips = $(".validate-tips");
            tips.text("Incorrect username/password combination.");
            tips.addClass("ui-state-error");
            tips.slideDown();
        },

        success: function(data, textStatus, jqXHR) {

            // initialize the app data 
            // TODO: possiblty replace by script generated server-side

            // create the user model
            TS.user = new TS.UserModel({
                id: name.val();,
                name: '' });

            // create the user view
            new TS.UserView({model: TS.user});

            // fetch the initial user data from the server
            TS.user.fetch();

            // create the user's timelines
            TS.timelineList = new TS.TimelineList([], {user: TS.user});

            // create the timeline list view
            new TS.TimelineListView({collection: TS.timelineList});
            TS.timelineList.fetch();

            // load the current timeline
            TS.currentTimeline = TS.timelineList.at(0);

            // create the timeline view
            new TS.TimelineView({model: TS.currentTimeline});

            // render the timeline view
            TS.currentTimeline.view.render();

            // load the entries for this timeline
            TS.entryList = new TS.EntryList([], {timeline: TS.currentTimeline});

            // create the new entry list view
            new TS.EntryListView
        }});
}