//
// emojiTablet.js
// A tablet app for sending emojis to other users
// 
// Author: Elisa Lupin-Jimenez
// Copyright High Fidelity 2017
//
// Licensed under the Apache 2.0 License
// See accompanying license file or http://apache.org/
//
// All assets are under CC Attribution Non-Commerical
// http://creativecommons.org/licenses/
//

var library = Script.require(Script.resolvePath("./emojiLib.js"));

(function() {

    var APP_NAME = "EMOJIS";
    var APP_URL = Script.resolvePath("./emojiTabletUI.html");
    var APP_ICON = Script.resolvePath("./icons/emoji-i.svg");
    var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");

    var DISTANCE = 0.5;
    var WANT_DEBUG = false;

    var button = tablet.addButton({
        icon: APP_ICON,
        text: APP_NAME
    });

    // Activates tablet UI when selected from menu
    function onClicked() {
        tablet.gotoWebScreen(APP_URL);
    }
    button.clicked.connect(onClicked);

    // Gives position right in front of user's avatar
    function getPositionToCreateEntity() {
        var direction = Quat.getFront(MyAvatar.orientation);
        var distance = DISTANCE;
        var position = Vec3.sum(MyAvatar.position, Vec3.multiply(direction, distance));
        position.y += DISTANCE;
        return position;
    }

    var emojiJSON = null;

    // Handles emoji button clicks to retrieve the link to the emoji JSON from emojiLib
    function onWebEventReceived(event) {
        if (JSON.parse(event).type === "emoji-click") {
            var emojiName = (JSON.parse(event)).data;
            var url = library.getEmoji(emojiName, library.emojiLib);
            if (url !== null) {
                emojiJSON = Script.require(url);
                create3DEmoji(emojiJSON, null);
            } else if (WANT_DEBUG) {
                print("Unable to create emoji");
            }
        }
    }
    tablet.webEventReceived.connect(onWebEventReceived);

    function create3DEmoji(emojiJSON, userName) {
        if (WANT_DEBUG) {
            print("Creating " + emojiJSON.name + " emoji");
        }
        emojiJSON.position = getPositionToCreateEntity(emojiJSON.personified);
        Entities.addEntity(emojiJSON);
    }

    // When tablet UI is closed and app is removed from menu
    function cleanup() {
        tablet.removeButton(button);
    }
    Script.scriptEnding.connect(cleanup);

}());