// Creating variables
var geometry = new THREE.SphereGeometry( 0.1, 10, 10 );
var material = new THREE.MeshPhongMaterial();
//https://pastebin.com/5ubWeen3

let segments = [];
segments.push(new THREE.Mesh(geometry, material));
segments[0].position.set(0, 0, 0);
scene.add(segments[0]);

let element = document.getElementById('userData');

for(let i = 0;i < 4;i ++) {
    grow();
}

let moveAngle1 = 0;
//let moveAngle2 = 0;
//camera.position.set(100, 100, 100);
//camera.lookAt(0, 0, 0);

var light = new THREE.PointLight( );
var light2 = new THREE.PointLight( );
light.position.set(2,2,3);
light2.position.set(-2, -2, 3);
scene.add( light );
scene.add( light2 );

function grow() {
    let prevIdx = segments.length - 1;
    var material = new THREE.MeshPhongMaterial();
    segments.push(new THREE.Mesh(geometry, material));
    segments[prevIdx+1].position.set(segments[prevIdx].position.x
                                    ,segments[prevIdx].position.y
                                    ,segments[prevIdx].position.z);
    scene.add(segments[prevIdx+1]);
    element.innerHTML = 'size: ' + segments.length;
}

function update() {
    if(isKeyPressed[65]) {
        moveAngle1 += Math.PI / 180 * 2;
    }
    if(isKeyPressed[68]) {
        moveAngle1 -= Math.PI / 180 * 2;
    }

    //camera.position.x = segments[segments.length-1].position.x;
    //camera.position.y = segments[segments.length-1].position.y;
    //camera.position.z = segments[segments.length-1].position.z;
    //camera.lookAt(segments[0].position);

    segments[0].position.x += Math.cos(moveAngle1) / 100;
    segments[0].position.y += Math.sin(moveAngle1) / 100;
    //segments[0].position.y += Math.cos(moveAngle2) / 100;
    segments[0].position.z += isKeyPressed[87] / 10;
    segments[0].position.z -= isKeyPressed[83] / 10;

    for(let i = 1;i < segments.length;i ++) {
        let prev = segments[i-1].position;
        let curr = segments[i].position;
        curr.x += (prev.x - curr.x) / 10;
        curr.y += (prev.y - curr.y) / 10;
        curr.z += (prev.z - curr.z) / 10;
    }
    for(let s1 = 0;s1 < segments.length;s1 ++) {
        segments[s1].material.color.setHex(0xffffff);
    }
    for(let s1 = 0;s1 < segments.length;s1 ++) {
        for(let s2 = s1 + 7;s2 < segments.length;s2 ++) {
            if(segments[s1].position.distanceTo(segments[s2].position) < 0.2) {
                segments[s1].material.color.setHex(0x2e0e33);
                segments[s2].material.color.setHex(0x2e0e33);
                //console.log("colision");
            }
        }
    }
    //segments[0].position.z += moveDirection.z;
}

setInterval(grow, 300);

function keyup(key) {
	// Show the pressed keycode in the console
	console.log("Pressed", key);
}
function mouseup() {
	// Show coordinates of mouse on click
	console.log("Mouse clicked at", mouseX, mouseY);
}