import {
    Color,
    ColorRepresentation,
    Mesh,
    MeshBasicMaterial,
    Object3D,
    TorusGeometry,
    Vector3,
} from 'three';
import { UI_LAYER_MASK } from '../../constant/VisibilityLayerMask';
import { DIVEHoverable } from '../../interface/Hoverable';
import { DraggableEvent } from '../../toolbox/BaseTool';
import { DIVERotateGizmo } from '../rotate/RotateGizmo';
import { DIVEDraggable } from '../../interface/Draggable';

export class DIVERadialHandle
    extends Object3D
    implements DIVEHoverable, DIVEDraggable
{
    readonly isHoverable: true = true;
    readonly isDraggable: true = true;

    public set debug(value: boolean) {
        this._colliderMesh.visible = value;
    }

    public parent: DIVERotateGizmo | null = null;

    public axis: 'x' | 'y' | 'z';

    private _color: Color = new Color(0xff00ff);
    private _colorHover: Color;
    private _hovered: boolean;
    private _highlight: boolean;
    public get highlight(): boolean {
        return this._highlight;
    }
    public set highlight(highlight: boolean) {
        this._highlight = highlight;
        this._lineMaterial.color =
            this._highlight || this._hovered ? this._colorHover : this._color;
    }

    private _lineMaterial: MeshBasicMaterial;

    private _colliderMesh: Mesh;

    public get forwardVector(): Vector3 {
        return new Vector3(0, 0, 1)
            .applyQuaternion(this.quaternion)
            .normalize();
    }

    public get rightVector(): Vector3 {
        return new Vector3(1, 0, 0)
            .applyQuaternion(this.quaternion)
            .normalize();
    }

    public get upVector(): Vector3 {
        return new Vector3(0, 1, 0)
            .applyQuaternion(this.quaternion)
            .normalize();
    }

    constructor(
        axis: 'x' | 'y' | 'z',
        radius: number,
        arc: number,
        direction: Vector3,
        color: ColorRepresentation,
    ) {
        super();

        this.name = 'DIVERadialHandle';
        this.axis = axis;

        this._color.set(color);
        this._colorHover = this._color.clone().multiplyScalar(2);
        this._hovered = false;
        this._highlight = false;

        // create line
        const lineGeo = new TorusGeometry(radius, 0.01, 13, 48, arc);
        this._lineMaterial = new MeshBasicMaterial({
            color: color,
            depthTest: false,
            depthWrite: false,
        });
        const lineMesh = new Mesh(lineGeo, this._lineMaterial);
        lineMesh.layers.mask = UI_LAYER_MASK;
        lineMesh.renderOrder = Infinity;
        this.add(lineMesh);

        // create collider
        const colliderGeo = new TorusGeometry(radius, 0.1, 3, 48, arc);
        const colliderMaterial = new MeshBasicMaterial({
            color: 0xff00ff,
            transparent: true,
            opacity: 0.15,
            depthTest: false,
            depthWrite: false,
        });
        this._colliderMesh = new Mesh(colliderGeo, colliderMaterial);
        this._colliderMesh.visible = false;
        this._colliderMesh.layers.mask = UI_LAYER_MASK;
        this._colliderMesh.renderOrder = Infinity;

        this.add(this._colliderMesh);

        this.lookAt(direction);
    }

    public reset(): void {
        this._lineMaterial.color = this._color;
    }

    public onPointerEnter(): void {
        this._hovered = true;
        if (this.parent) {
            this.parent.onHandleHover(this, true);
        }
    }

    public onPointerLeave(): void {
        this._hovered = false;
        if (this.parent) {
            this.parent.onHandleHover(this, false);
        }
    }

    public onDragStart(): void {
        if (this.parent) {
            this.parent.onHandleDragStart(this);
        }
    }

    public onDrag(e: DraggableEvent): void {
        if (this.parent) {
            this.parent.onHandleDrag(this, e);
        }
    }

    public onDragEnd(): void {
        if (this.parent) {
            this.parent.onHandleDragEnd(this);
        }
    }
}