(function() {
    var messageChannel = 'MESSAGE_CHANNEL_GATE_GAME';
    var scoreboardID;

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

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

        switch (data.type) {
            case 'RENDER':
                renderScoreboard(data.racers);
                break;
        }
    }

    function renderScoreboard(racers) {
        var text = '';
        for (var sessionUUID in racers) {
            var racer = racers[sessionUUID];
            if (racer.isRacing) {
                text += racer.name + ' is racing!\n';
            }
            else {
                text += racer.name + ' ' + racer.finishTime.toFixed(2) + ' / ' + racer.bestTime.toFixed(2) + '\n';
            }
        }
        Entities.editEntity(scoreboardID, {
            text: text
        });
    }


    return {
        preload: function(id) {
            scoreboardID = id;
            Messages.subscribe(messageChannel);
            Messages.messageReceived.connect(null, onReceivedMessage);
        },
        unload: function(id) {
            sendMessage({
                type: 'REMOVE_RACER',
                avatarSessionUUID: MyAvatar.sessionUUID
            });
            Messages.unsubscribe(messageChannel);
            Messages.messageReceived.disconnect(null, onReceivedMessage);
        },
    };
})