/* eslint-disable */
var faceInit = function () {
  var container = document.querySelector("#face_container")
  var camera, controls, scene, renderer
  var mouse = new THREE.Vector2(0.5, 0.5)
  var mouseTarget = new THREE.Vector2(0.5, 0.5)
  var POINT_SCALE = 1.8
  var FACE_POINT_COUNT = 68
  var SWAP_TIME = 500
  var cubes = [], meshes = []
  var currentFace = document.querySelector('.currentFace')
  var faceBuffer = (function () {
    var a = new Array(FACE_POINT_COUNT)
    for (let i = 0; i < FACE_POINT_COUNT; i++) {
      a[i] = new THREE.Vector3()
    }
    return a
  })()
  var lastSprite
  var last_t = 0, start_t = 0
  var bgColor = 0x000000 // 0x191919
  var colors = [
    0xff3333,
    0xff8833,
    0xffff33,
    0x338833,
    0x3388ff,
    0x3333ff,
    0x8833ff,
    0xff3388,
    0xffffff,
  ]
  var swapping = false, swap_count = 0, swapFrom, swapTo, face_names, faces
  init()

  function init() {
    fetch("/assets/data/3dlm_0_10.json")
      .then(req => req.json())
      .then(data => {
        face_names = Object.keys(data)
        faces = face_names.map(name => recenter(data[name]))
        setup()
        build(faces[0])
        updateFace(faces[0])
        setCurrentFace(face_names[0])
        swapTo = faces[0]
        animate()
      })
  }
  function setup() {
    var w = window.innerWidth * 2/3
    var h = Math.min(window.innerWidth / 2, window.innerHeight * 0.7)
    camera = new THREE.PerspectiveCamera(70, w/h, 1, 10000)
    camera.position.x = 0
    camera.position.y = 0
    camera.position.z = 200

    scene = new THREE.Scene()
    // scene.background = new THREE.Color(bgColor)

    renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true })
    renderer.setPixelRatio(window.devicePixelRatio)
    renderer.setSize(w, h)
    renderer.setClearColor(0x000000, 0);
    container.appendChild(renderer.domElement)
    document.body.addEventListener('mousemove', onMouseMove)
    // renderer.domElement.addEventListener('mousedown', swap)
    // oktween.add({
    //   obj: el.style,
    //   units: "px",
    //   from: { left: 0 },
    //   to: { left: 100 },
    //   duration: 1000,
    //   easing: oktween.easing.circ_out,
    //   update: function(obj){
    //     console.log(obj.left)
    //   }
    //   finished: function(){
    //     console.log("done")
    //   }
    // })
    swap()
  }
  function build(points) {
    var matrix = new THREE.Matrix4()
    var quaternion = new THREE.Quaternion()

    for (var i = 0; i < FACE_POINT_COUNT; i++) {
      var p = points[i]
      var geometry = new THREE.BoxBufferGeometry()
      var position = new THREE.Vector3(p[0], p[1], p[2])
      var rotation = new THREE.Euler()
      var scale = new THREE.Vector3()
      var color = new THREE.Color()
      scale.x = scale.y = scale.z = POINT_SCALE
      quaternion.setFromEuler(rotation, false)
      matrix.compose(position, quaternion, scale)
      geometry.applyMatrix(matrix)
      material = new THREE.MeshBasicMaterial({ color: color.setHex(0xffffff) })
      cube = new THREE.Mesh(geometry, material)
      scene.add(cube)
      cubes.push(cube)
    }

    meshes = getLineGeometry(points).map((geometry, i) => {
      var color = new THREE.Color()
      var material = new MeshLineMaterial({
        color: color.setHex(colors[i % colors.length]),
      })
      var line = new MeshLine()
      line.setGeometry(geometry, _ => 1.5)
      var mesh = new THREE.Mesh(line.geometry, material)
      mesh.geometry.dynamic = true
      scene.add(mesh)
      return [line, mesh]
    })
  }
  function lerpPoints(n, A, B, C) {
    for (let i = 0, len = A.length; i < len; i++) {
      lerpPoint(n, A[i], B[i], C[i])
    }
  }
  function lerpPoint(n, A, B, C) {
    C.x = lerp(n, A.x, B.x)
    C.y = lerp(n, A.y, B.y)
    C.z = lerp(n, A.z, B.z)
  }
  function lerp(n, a, b) {
    return (b-a) * n + a
  }
  function swap(){
    swap_count = (swap_count + 1) % faces.length
    swapFrom = swapTo || faces[0]
    swapTo = faces[swap_count]
    setCurrentFace(face_names[swap_count])
    oktween.add({
      from: { n: 0 },
      to: { n: 1 },
      duration: 1000,
      easing: oktween.easing.quad_in_out,
      update: function(obj){
        lerpPoints(obj.n, swapFrom, swapTo, faceBuffer)
        updateFace(faceBuffer)
      },
      finished: function(){
        setTimeout(swap, 2000)
      }
    })
  }
  function setCurrentFace(name) {
    name = name.replace('.png', '').split('_').filter(s => !s.match(/\d+/)).join(' ')
    currentFace.innerHTML = name
    // if (lastSprite) {
    //   scene.remove(lastSprite)
    // }
    // var sprite = new THREE.TextSprite({
    //   textSize: 12,
    //   redrawInterval: 1000,
    //   material: {
    //     color: 0xcccccc,
    //   },
    //   texture: {
    //     text: name,
    //     fontFamily: '"Roboto", "Helvetica", sans-serif',
    //   },
    // });
    // sprite.position
    //   .setX(0)
    //   .setY(0)
    //   .setZ(0)
    // scene.add(sprite);
    // lastSprite = sprite
  }
  function updateFace(points) {
    updateCubeGeometry(points)
    updateLineGeometry(points)
  }
  function updateCubeGeometry(points) {
    cubes.forEach((cube, i) => {
      const p = points[i]
      cube.position.set(p.x, p.y, p.z)
    })
  }
  function updateLineGeometry(points) {
    getLineGeometry(points).map((geometry, i) => {
      var [line, mesh] = meshes[i]
      line.setGeometry(geometry, _ => 1.5)
      mesh.geometry.vertices = line.geometry.vertices
      mesh.geometry.verticesNeedUpdate = true
    })
  }
  function getLineGeometry(points) {
    return [
      points.slice(0, 17),
      points.slice(17, 22),
      points.slice(22, 27),
      points.slice(27, 31),
      points.slice(31, 36),
      points.slice(36, 42),
      points.slice(42, 48),
      points.slice(48)
    ].map((a, i) => {
      var geometry = new THREE.Geometry()
      a.forEach(p => geometry.vertices.push(p))
      if (i > 4) {
        geometry.vertices.push(a[0])
      }
      return geometry
    })
  }
  function getBounds(obj) {
    return obj.reduce((a, p) => {
      return [
        Math.min(a[0], p[0]),
        Math.max(a[1], p[0]),
        Math.min(a[2], p[1]),
        Math.max(a[3], p[1]),
        Math.min(a[4], p[2]),
        Math.max(a[5], p[2]),
      ]
    }, [Infinity, -Infinity, Infinity, -Infinity, Infinity, -Infinity])
  }
  function recenter(obj) {
    const bounds = getBounds(obj)
    const x_width = (bounds[1] - bounds[0]) / 2
    const y_width = (bounds[3] - bounds[2]) / -3
    const z_width = (bounds[5] - bounds[4]) / 2
    return obj.map(p => {
      p[0] = p[0] - bounds[0] - x_width
      p[1] = -p[1] + bounds[1] + y_width
      p[2] = p[2] - bounds[2] + z_width
      return new THREE.Vector3(p[0], p[1], p[2])
    })
  }
  //
  function onMouseMove(e) {
    mouse.x = e.clientX / window.innerWidth
    mouse.y = e.clientY / window.innerHeight
  }
  function animate(t) {
    requestAnimationFrame(animate)
    renderer.render(scene, camera)
    // scene.rotation.y += 0.01 * Math.PI
    mouseTarget.x += (mouse.x - mouseTarget.x) * 0.1
    mouseTarget.y += (mouse.y - mouseTarget.y) * 0.1
    scene.rotation.x = (mouseTarget.y - 0.5) * Math.PI / 2
    scene.rotation.y = (mouseTarget.x - 0.5) * Math.PI
    // scene.rotation.y += 0.01
    last_t = t
  }
}
faceInit()