// --- Global Variables ---
let scene, camera, renderer, tvScreen, videoTexture, dust, screenLight, lampLightPoint, lampLightSpot;

// VCR Display related variables
let simulatedPlaybackTime = 0;
let lastUpdateTime = -1;
let baseTime = 0;
let isVideoLoaded = false;
let videoUrls = []; // Array to hold all video URLs
let currentVideoIndex = -1; // Index of the currently playing video

const originalLampIntensity = 0.8; // Base intensity for the flickering lamp
const originalScreenIntensity = 0.2; // Base intensity for the screen glow
const screenIntensityPulse = 0.2;

const roomSize = 5;
const roomHeight = 3;

const container = document.body;
const videoElement = document.getElementById('video');
const fileInput = document.getElementById('fileInput');
const loadTapeButton = document.getElementById('loadTapeButton');
const loader = new THREE.TextureLoader();

const debugLight = false;

const FLIES_COUNT = 2; // Flies
const flies = [];
let landingSurfaces = []; // Array to hold floor and table for fly landings
const raycaster = new THREE.Raycaster();

// --- Configuration ---
const ROOM_SIZE = roomSize;
const FLIGHT_HEIGHT_MIN = 0.5; // Min height for flying
const FLIGHT_HEIGHT_MAX = roomHeight * 0.9; // Max height for flying
const FLY_FLIGHT_SPEED_FACTOR = 0.01; // How quickly 't' increases per frame
const DAMPING_FACTOR = 0.05;
const FLY_WAIT_BASE = 1000;
const FLY_LAND_CHANCE = 0.3;

// --- Seedable Random Number Generator (Mulberry32) ---
let seed = 12345; // Default seed, will be overridden per shelf