import * as THREE from 'three';

import Config from '../../data/config';

// Sets up and places all lights in scene
export default class Light {
  constructor(scene) {
    this.scene = scene;

    this.init();
  }

  init() {
    // Ambient
    this.ambientLight = new THREE.AmbientLight(Config.ambientLight.color);
    this.ambientLight.visible = Config.ambientLight.enabled;

    // Point light
    this.pointLight = new THREE.PointLight(Config.pointLight.color, Config.pointLight.intensity, Config.pointLight.distance);
    this.pointLight.position.set(Config.pointLight.x, Config.pointLight.y, Config.pointLight.z);
    this.pointLight.visible = Config.pointLight.enabled;

    // Directional light
    this.directionalLight = new THREE.DirectionalLight(Config.directionalLight.color, Config.directionalLight.intensity);
    this.directionalLight.position.set(Config.directionalLight.x, Config.directionalLight.y, Config.directionalLight.z);
    this.directionalLight.visible = Config.directionalLight.enabled;

    // Shadow map
    this.directionalLight.castShadow = Config.shadow.enabled;
    this.directionalLight.shadow.bias = Config.shadow.bias;
    this.directionalLight.shadow.camera.near = Config.shadow.near;
    this.directionalLight.shadow.camera.far = Config.shadow.far;
    this.directionalLight.shadow.camera.left = Config.shadow.left;
    this.directionalLight.shadow.camera.right = Config.shadow.right;
    this.directionalLight.shadow.camera.top = Config.shadow.top;
    this.directionalLight.shadow.camera.bottom = Config.shadow.bottom;
    this.directionalLight.shadow.mapSize.width = Config.shadow.mapWidth;
    this.directionalLight.shadow.mapSize.height = Config.shadow.mapHeight;

    // Shadow camera helper
    this.directionalLightHelper = new THREE.CameraHelper(this.directionalLight.shadow.camera);
    this.directionalLightHelper.visible = Config.shadow.helperEnabled;

    // Hemisphere light
    this.hemiLight = new THREE.HemisphereLight(Config.hemiLight.color, Config.hemiLight.groundColor, Config.hemiLight.intensity);
    this.hemiLight.position.set(Config.hemiLight.x, Config.hemiLight.y, Config.hemiLight.z);
    this.hemiLight.visible = Config.hemiLight.enabled;
  }

  place(lightName) {
    switch(lightName) {
      case 'ambient':
        this.scene.add(this.ambientLight);
        break;

      case 'directional':
        this.scene.add(this.directionalLight);
        this.scene.add(this.directionalLightHelper);
        break;

      case 'point':
        this.scene.add(this.pointLight);
        break;

      case 'hemi':
        this.scene.add(this.hemiLight);
        break;
    }
  }
}