const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
let homeContainer = new THREE.Group()
scene.add(homeContainer)
let home = new THREE.Group()
homeContainer.add(home)

const renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );

const light = new THREE.AmbientLight(0xFFAAAA, 1)
// light.position.z = 100
scene.add(light)

// back the camera up
camera.position.z = 25

// flip home on x axis
home.rotation.x = Math.PI

// Rotate container a bit for comfort
homeContainer.rotation.x = 0.6 * (-Math.PI / 2)

function animate() {
    requestAnimationFrame( animate );

    homeContainer.rotation.z += 0.005;

    renderer.render( scene, camera );
}

animate();

function setPosition(mesh, x, y, z, w, h, d) {
    // position sets the *center* position
    // our coordinates are top/left/bottom

    let meshX = x + w/2
    let meshY = y + h/2
    let meshZ = z - d/2
    mesh.position.x = meshX
    mesh.position.y = meshY
    mesh.position.z = meshZ
}

function configureScene(data) {
    var minX = 1000
    var maxX = -1000
    var minY = minX
    var maxY = maxX

    // Add geometry for the rooms
    for (var room of data.rooms) {
        let roomContainer = new THREE.Group()
        roomContainer.userData = room.name

        let roomGeo = new THREE.BoxGeometry(room.w, room.h, room.d)
        let roomColor = new THREE.Color(room.color)
        let roomBoxMaterial = new THREE.MeshPhysicalMaterial({ color: roomColor })
        roomBoxMaterial.transparent = true
        roomBoxMaterial.opacity = 0.3
        let roomMesh = new THREE.Mesh(roomGeo, roomBoxMaterial)

        roomContainer.add(roomMesh)

        let roomEdgesGeo = new THREE.EdgesGeometry(roomGeo)
        let roomLinesMaterial = new THREE.LineBasicMaterial({ color: roomColor })
        let roomLines = new THREE.LineSegments(roomEdgesGeo, roomLinesMaterial)
        roomContainer.add(roomLines)

        setPosition(roomContainer, room.x, room.y, room.z || 0, room.w, room.h, room.d)
        home.add(roomContainer)

        minX = Math.min(minX, room.x)
        minY = Math.min(minY, room.y)

        maxX = Math.max(maxX, room.x + room.w)
        maxY = Math.max(maxY, room.y + room.h)
    }
    let xExtent = maxX - minX
    let yExtent = maxY - minY
    home.position.x = -1 * (xExtent / 2)
    home.position.y = +1 * (yExtent / 2)
}

async function doLoad() {
    let request = new Request('data.json');
    fetch(request)
    .then(response => {
        return response.json()
    })
    .then(json => {
        configureScene(json)
    })
}

doLoad();