import * as THREE from './threejs/build/three.module.js';
import { keys } from './Core.js';
import { GLTFLoader } from './threejs/examples/jsm/loaders/GLTFLoader.js';

export class Ship {
    constructor(scene) {
        this.scene = scene;
        this.targetAngle = 0;
        this.angle = 0;
        this.speed = 0.01;
        this.turnSpeed = 60 * Math.PI / 180;
        this.position = new THREE.Vector3();
        this.velocity = new THREE.Vector3();
        this.acceleration = new THREE.Vector3();
        this.drag = new THREE.Vector3(0.97, 1, 0.97);
        this.clock = new THREE.Clock();
    }

    static loadShip() {
        return new Promise((resolve, reject) => {
            var gltfloader = new GLTFLoader();
            return gltfloader.load(
                './models/Models/glTF format/ship_light.gltf',
                function (gltf) {
                    resolve(gltf);
                },
                function (xhr) { },
                function (error) {
                    reject(error);
                }
            );
        });
    }

    init() {
        this.scene.traverse(function (node) {
            if (node.isMesh) { /*node.castShadow = true;*/ node.receiveShadow = true; }
        });

        let starboardLight = new THREE.PointLight(0x80ffff, 0.8, 5, 1);
        starboardLight.position.set(1.25, 2.05, 2);
        starboardLight.castShadow = true;
        this.scene.add(starboardLight);

        let portLight = new THREE.PointLight(0xff80ff, 0.8, 5, 1);
        portLight.position.set(-2.5, 2.05, 2);
        portLight.castShadow = true;
        this.scene.add(portLight);

        let bowLight = new THREE.PointLight(0xffff80, 0.8, 5, 1);
        bowLight.position.set(-0.75, 1.40, -4.75);
        bowLight.castShadow = true;
        this.scene.add(bowLight);
    }

    handleInput() {
        if (keys["KeyA"]) { //left
            this.targetAngle += this.turnSpeed;
        }
        if (keys["KeyD"]) { //right
            this.targetAngle += -this.turnSpeed;
        }
        this.acceleration.set(0, 0, 0);

        if (keys["KeyW"]) { //up
            this.acceleration.set(this.speed * Math.sin((180 + this.angle) * Math.PI / 180), 0, this.speed * Math.cos((180 + this.angle) * Math.PI / 180));
            //this.targetAngle = 0;
        }

        if (keys["KeyS"]) { //down
            //this.acceleration.set(this.speed * Math.cos(this.angle), 0, this.speed * Math.sin(this.angle));
            //this.targetAngle = 180;
        }
    }

    computeWave() {
        let u_time = this.clock.getElapsedTime();
        let p = this.position;
        let wave = {
            x: 0,
            z: 0
        };

        wave.x = Math.sin(2.5 * (u_time + (p.z * 0.1)));
        wave.x += Math.sin(3.5 * (u_time + (p.x * 0.1)));

        wave.z = Math.sin(2.5 * (u_time + (p.z * 0.1)));
        wave.z += Math.sin(3.5 * (u_time + (p.x * 0.1)));

        return wave;
    }

    updateModel() {
        if (this.angle != this.targetAngle) {
            this.angle += this.turnSpeed * (this.angle - this.targetAngle > 0 ? -1 : 1);
            if (Math.abs(this.angle - this.targetAngle) < this.turnSpeed) {
                this.angle = this.targetAngle;
            }
        }

        let wave = this.computeWave();
        this.position.add(this.velocity.add(this.acceleration).multiply(this.drag));
        this.position.setY(0.3 * wave.x + 0.4);
        //this.position.setY(0.20 * Math.sin(new Date().getTime() / 500) - 0.5);

        this.scene.rotation.set(
            0.05 * wave.x,
            this.angle * Math.PI / 180,
            0.05 * wave.z);
        this.scene.position.set(this.position.x, this.position.y, this.position.z);
    }
}