(function() {
    'use strict';

    var lift = {};

    var buttonSheet, background = null;
    var buttons = [];
    var roomState = {
        bridgeAccessible: false,
        hydroDoorBroken: true
    };


    var createButtonEntity = function(i, room) {
        var e = muri.get('entity')
            .create('lift.button'+i,
                    kontra.sprite({x: 59, y: i*2+8+i*2,
                                   animations: buttonSheet.animations}))
            .addCallback(function() {
                buttons.forEach(function(b) { b.sprite.playAnimation('off'); });

                if (room === 'bridge' && !roomState.bridgeAccessible) {
                    muri.get('bubble')
                        .talk([
                            'The bridge is not accessible.',
                            'You have no sufficient permission to do that.']);
                    return;
                }

                if (room === 'hydro' && roomState.hydroDoorBroken) {
                    muri.get('bubble')
                        .talk([
                            'The hyperlift moved, but to door to the hydro deck does not open.',
                            'You can\'t access this deck with a broken door.'
                        ]);
                    return;
                }

                if (room === 'shot') {
                    muri.end([
                        'You stepped into a pressure shot ... ',
                        'Which is broken on this ship.',
                        'It takes no more than a second to drag you into space.',
                        'You are lost ... ....',
                        '... and die.']);
                    return;
                }

                muri.get('entity').get('lift.button'+i).sprite.playAnimation('on');
                var goMessage = muri.ra([
                    'Sure, ' + room,
                    'Okay, straight to ' + room,
                    'Set ' + room + ' for destination',
                    room + ', okay'
                ]);
                muri.get('bubble')
                    .talk([goMessage])
                    .then(function() {
                        muri.changeRoom(room);
                    });
            });
        e.sprite.playAnimation('off');
        return e;
    };

    lift.init = function() {
        buttonSheet = kontra.spriteSheet({
            image: kontra.assets.images.lift_button,
            frameWidth: 2, frameHeight: 2,
            animations: {
                on: {frames: 1},
                off: {frames: 0}
            }
        });

        background = muri.bg('lift');
        buttons = [
            createButtonEntity(0, 'bridge'), // Bridge
            createButtonEntity(1, 'hydro'),  // Hydro Deck
            createButtonEntity(2, 'stasis'), // Stasis
            createButtonEntity(3, 'shot'),   // Shot
            createButtonEntity(4, 'engine')  // Engine room
        ];
        buttons[2].sprite.playAnimation('on');
    };

    lift.onEnter = function(fromRoom) {
        var welcomeMessage = muri.ra([
            'Welcome on board, where do you want?',
            'Please specify your destination.',
            'Insert desired deck on console.',
            'What level please?'
        ]);
        muri.get('bubble').talk([welcomeMessage]);
    };

    lift.update = function() {};

    lift.render = function() {
        background.render();
    };
    
    lift.name = 'lift';
    muri.rooms.push(lift);
}());