import { Command } from './Command';
import { useDispatchSignal } from "@/hooks";
import App from "../app/App";

/**
 * @param object THREE.Object3D
 * @param newParent THREE.Object3D
 * @param newBefore THREE.Object3D
 * @constructor
 */
class MoveObjectCommand extends Command {
    public object;
    public oldParent;
    public oldIndex;
    public newParent;
    public newIndex;
    public newBefore;

	constructor(object, newParent, newBefore ) {
		super();

		this.type = 'MoveObjectCommand';
		this.name = 'Move object';

		this.object = object;
		this.oldParent = ( object !== undefined ) ? object.parent : undefined;
		this.oldIndex = ( this.oldParent !== undefined ) ? this.oldParent.children.indexOf( this.object ) : undefined;
		this.newParent = newParent;

		if ( newBefore !== undefined ) {
			this.newIndex = ( newParent !== undefined ) ? newParent.children.indexOf( newBefore ) : undefined;
		} else {
			this.newIndex = ( newParent !== undefined ) ? newParent.children.length : undefined;
		}

		if ( this.oldParent === this.newParent && this.newIndex > this.oldIndex ) {
			this.newIndex--;
		}

		this.newBefore = newBefore;
	}

	execute() {
		this.oldParent.remove(this.object);

        /** 放置到新组下时不改变世界坐标 **/
        // this.newParent.updateWorldMatrix(true, false);
        // const _m1 = new Matrix4();
        // _m1.copy(this.newParent.matrixWorld).invert();
        // if (this.object.parent !== null) {
        //     this.object.parent.updateWorldMatrix( true, false );
        //     _m1.multiply( this.object.parent.matrixWorld );
        // }
        // this.object.applyMatrix4( _m1 );
        /** 放置到新组下时不改变世界坐标 End **/

        const children = this.newParent.children;
		children.splice( this.newIndex, 0, this.object );
		this.object.parent = this.newParent;

        /** 放置到新组下时不改变世界坐标 **/
        // this.object.updateWorldMatrix( false, true );
        /** 放置到新组下时不改变世界坐标 End **/

		this.object.dispatchEvent({ type: 'added' });
        useDispatchSignal("sceneGraphChanged");
	}

	undo() {
		this.newParent.remove(this.object);

        /** 撤销时不改变世界坐标 **/
        // this.oldParent.updateWorldMatrix(true, false);
        // const _m1 = new Matrix4();
        // _m1.copy(this.oldParent.matrixWorld).invert();
        // if (this.object.parent !== null) {
        //     this.object.parent.updateWorldMatrix(true, false);
        //     _m1.multiply( this.object.parent.matrixWorld );
        // }
        // this.object.applyMatrix4(_m1);
        /** 撤销时不改变世界坐标 End **/

		const children = this.oldParent.children;
		children.splice( this.oldIndex, 0, this.object );
		this.object.parent = this.oldParent;

        /** 撤销时不改变世界坐标 **/
        // this.object.updateWorldMatrix( false, true );
        /** 撤销时不改变世界坐标 End **/

		this.object.dispatchEvent( { type: 'added' } );
        useDispatchSignal("sceneGraphChanged");
	}

	toJSON() {
		const output = super.toJSON();

		output.objectUuid = this.object.uuid;
		output.newParentUuid = this.newParent.uuid;
		output.oldParentUuid = this.oldParent.uuid;
		output.newIndex = this.newIndex;
		output.oldIndex = this.oldIndex;

		return output;
	}

	fromJSON(json) {
		super.fromJSON(json);

		this.object = App.getObjectByUuid(json.objectUuid);
		this.oldParent = App.getObjectByUuid(json.oldParentUuid);
		if (this.oldParent === undefined) {
			this.oldParent = App.scene;
		}

		this.newParent = App.getObjectByUuid(json.newParentUuid);

		if (this.newParent === undefined) {
			this.newParent = App.scene;
		}

		this.newIndex = json.newIndex;
		this.oldIndex = json.oldIndex;
	}
}

export { MoveObjectCommand };