(function() {
    var messageChannel = 'MESSAGE_CHANNEL_GATE_GAME';
    var entityID;
    var scores;

    function sendMessage(message) {
        message.entityID = entityID;
        Messages.sendMessage(
            messageChannel,
            JSON.stringify(message)
        );
    }

    function onReceivedMessage(channel, message, senderID) {
        try {
            var data = JSON.parse(message);
        } catch (e) {
            print('Error parsing message: ' + message);
            return;
        }
        print('data: ' + JSON.stringify(data));

        switch (data.type) {
            case 'PASS':
                if (!scores[data.name]) {
                    scores[data.name] = {};
                    scores[data.name].name = data.name;
                }
                if (!scores[data.name].startTime) {
                    scores[data.name].startTime = Date.now();
                    scores[data.name].time = 'racing...';
                } else {
                    scores[data.name].time = Math.floor((Date.now() - scores[data.name].startTime) / 1000) + ' sec';
                    scores[data.name].startTime = null;
                }
                renderScoreboard();
                break;
        }
    }

    function renderScoreboard() {
        var text = '';
        Object.keys(scores).forEach(function(score) {
            text += score.name + ' ' + score.time + '\n';
        });
        Entities.editEntity(entityID, {
            text: text
        });
    }


    return {
        preload: function(id) {
            entityID = id;
            scores = {};
            Messages.subscribe(messageChannel);
            Messages.messageReceived.connect(null, onReceivedMessage);
            print('Hello Scoreboard');
            Entities.editEntity(entityID, {
                text: 'Hello Scoreboard'
            });
        },
        unload: function(id) {
            Messages.unsubscribe(messageChannel);
            Messages.messageReceived.disconnect(null, onReceivedMessage);
        },
    };
})