import * as THREE from "./lib/three.module.js";
import { PCDLoader } from "./lib/PCDLoader.js";
import { OrbitControls } from "./lib/OrbitControls.js";
import { GUI } from "./lib/dat.gui.module.js";
import { TextFileLoader } from "./text_file_loader.js";

var container, stats;
var camera, controls, scene, renderer;
var camera;

var params = {
  src: true,
  tgt: true,
  out: true,
  reload: load_all,
};

var last_cloud_ind = {
  src: true,
  tgt: true,
  out: true,
};

var clouds = {};

init();
animate();
function init() {
  document.body.addEventListener("keydown", (event) => {
    if (event.ctrlKey && "asdv".indexOf(event.key) !== -1) {
      event.preventDefault();
    }
  });

  scene = new THREE.Scene();

  renderer = new THREE.WebGLRenderer({ antialias: true });
  renderer.setPixelRatio(window.devicePixelRatio);

  camera = new THREE.PerspectiveCamera(
    65,
    window.innerWidth / window.innerHeight,
    1,
    800
  );
  camera.position.x = 0;
  camera.position.z = 50;
  camera.position.y = 0;
  camera.up.set(0, 0, 1);
  camera.lookAt(0, 0, 0);

  controls = new OrbitControls(camera, renderer.domElement);
  controls.addEventListener("change", render); // call this only in static scenes (i.e., if there is no animation loop)

  container = document.createElement("container");

  document.body.appendChild(container);
  container.appendChild(renderer.domElement);

  document.addEventListener("keydown", keydown);

  init_gui();
  //scene.add( new THREE.AxesHelper( 2 ) );

  onWindowResize();
  window.addEventListener("resize", onWindowResize, false);

  load_all();

  render();
}

function load_all() {
  clearAll();
  load_pcd("src", "/temp/src.pcd", 0xff0000);
  load_pcd("tgt", "/temp/tgt.pcd", 0x00ff00);
  load_pcd("out", "/temp/out.pcd", 0xffff00);
  load_transform_matrix();
}

function clearAll() {
  remove(clouds["src"]);
  remove(clouds["tgt"]);
  remove(clouds["out"]);

  clouds["src"] = null;
  clouds["tgt"] = null;
  clouds["our"] = null;

  function remove(p) {
    if (p) {
      scene.remove(p);
      p.geometry.dispose();
      p.material.dispose();
    }
  }
}

function keydown(ev) {
  switch (ev.key) {
    case "+":
      clouds["src"].material.size *= 1.2;
      clouds["tgt"].material.size *= 1.2;
      clouds["out"].material.size *= 1.2;
      break;
    case "-":
      clouds["src"].material.size /= 1.2;
      clouds["tgt"].material.size /= 1.2;
      clouds["out"].material.size /= 1.2;

      break;
  }
}

function onWindowResize() {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
  requestAnimationFrame(animate);
  controls.update();
  render();
  switch_cloud("src");
  switch_cloud("tgt");
  switch_cloud("out");

  function switch_cloud(name) {
    if (params[name] != last_cloud_ind[name]) {
      last_cloud_ind[name] = params[name];
      if (last_cloud_ind[name]) {
        scene.add(clouds[name]);
      } else {
        scene.remove(clouds[name]);
      }
    }
  }
}

function render() {
  renderer.render(scene, camera);
}

function load_transform_matrix() {
  var loader = new TextFileLoader();
  loader.load("/temp/trans.json", function (json) {
    console.log(json);
    var mat = JSON.parse(json);

    var trans_html = "<table><tbody>";
    for (var i = 0; i < 4; i++) {
      trans_html += "<tr>";
      for (var j = 0; j < 4; j++)
        trans_html += "<td>" + mat[i * 4 + j] + "</td>";
      trans_html += "</tr>";
    }
    trans_html += "</tbody></table>";
    document.getElementById("info").innerHTML = trans_html;
  });
}

function load_pcd(name, file, overall_color) {
  var loader = new PCDLoader();

  loader.load(file, function (pcd) {
    var position = pcd.position;
    var color = pcd.color;
    var normal = pcd.normal;
    // build geometry
    var geometry = new THREE.BufferGeometry();
    if (position.length > 0)
      geometry.addAttribute(
        "position",
        new THREE.Float32BufferAttribute(position, 3)
      );
    if (normal.length > 0)
      geometry.addAttribute(
        "normal",
        new THREE.Float32BufferAttribute(normal, 3)
      );
    if (color.length > 0)
      geometry.addAttribute(
        "color",
        new THREE.Float32BufferAttribute(color, 3)
      );

    geometry.computeBoundingSphere();
    // build material

    var material = new THREE.PointsMaterial({ size: 0.005 });

    if (color.length > 0) {
      material.vertexColors = VertexColors;
    } else {
      material.color.setHex(overall_color);
    }

    //material.size = 0.1;

    // build mesh

    var mesh = new THREE.Points(geometry, material);
    mesh.name = "pcd";

    //return mesh;
    if (params[name]) scene.add(mesh);

    clouds[name] = mesh;
    //var center = points.geometry.boundingSphere.center;
    //controls.target.set( center.x, center.y, center.z );
    //controls.update();
  });
}

function init_gui() {
  var gui = new GUI();

  var cfgFolder = gui.addFolder("View");

  cfgFolder.add(params, "src");
  cfgFolder.add(params, "tgt");
  cfgFolder.add(params, "out");
  cfgFolder.add(params, "reload");
  cfgFolder.open();
  gui.open();
}