import { Input } from '../io/Input.js'
import { M } from '../math/Math.js'
import { Vec3 } from '../math/Vec3.js'

export class SimpleController {

    constructor(camera) {
        this.camera = camera
        this.lookSpeed = 100
        this.moveSpeed = 10
    }

    update(dt) {
        var press = Input.isKeyDown
        var rotate = new Vec3();
        if (press('ArrowRight')) rotate.y += 1;
        if (press('ArrowLeft')) rotate.y -= 1;
        if (press('ArrowUp')) rotate.x -= 1;
        if (press('ArrowDown')) rotate.x += 1;
        if(rotate.dot(rotate) > Number.EPSILON) {
            var normal = rotate.normalize()
            this.camera.rotation.x += this.lookSpeed * dt * normal.x;
            this.camera.rotation.y += this.lookSpeed * dt * normal.y;
            this.camera.rotation.z += this.lookSpeed * dt * normal.z;
        }
        this.camera.rotation.x = M.clamp(this.camera.rotation.x, -90, 90)
        this.camera.rotation.y = this.camera.rotation.y % 360
    
        const yaw = this.camera.rotation.y * (Math.PI/180);
        var forward = new Vec3(Math.sin(yaw), 0, Math.cos(yaw))
        var left = new Vec3(-forward.z, 0, forward.x)
        var up = new Vec3(0, 1, 0)
    
        var move = new Vec3();
        if (press('w')) move.add(forward)
        if (press('s')) move.sub(forward)
        if (press('a')) move.add(left)
        if (press('d')) move.sub(left)
        if (press('q')) move.sub(up)
        if (press('e')) move.add(up)
    
        if(move.dot(move) > Number.EPSILON) {
            var normal = move.normalize()
            this.camera.position.x += this.moveSpeed * dt * normal.x;
            this.camera.position.y += this.moveSpeed * dt * normal.y;
            this.camera.position.z += this.moveSpeed * dt * normal.z;
        }
    }

}