/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */

"use strict";

(function() {

gapp.register("mesh.model", [
    "add.three",    // dep: add.three
    "moto.license", // dep: moto.license
    "mesh.group",   // dep: mesh.group
]);

let mesh = self.mesh = self.mesh || {};
if (mesh.model) return;

/** default materials **/
mesh.material = {
    solid: new THREE.MeshPhongMaterial({
        transparent: true,
        shininess: 100,
        specular: 0x181818,
        color: 0xffff00,
        opacity: 1
    })
};

/** 3D model rendered on plaform **/
mesh.model = class MeshModel {
    constructor(data) {
        let { file, mesh } = data;

        if (!mesh) {
            dbug.error(`'${file}' missing mesh data`);
            return;
        }

        this.file = file;
        this.mesh = this.load(mesh);
    }

    bounds() {
        return new THREE.Box3().setFromObject(this.mesh);
    }

    load(vertices, indices) {
        let geo = new THREE.BufferGeometry();
        if (indices) geo.setIndex(new THREE.BufferAttribute(indices, 1));
        geo.setAttribute('position', new THREE.BufferAttribute(vertices, 3));
        geo.setAttribute('normal', undefined);
        let meh = new THREE.Mesh(geo, mesh.material.solid);
        geo.computeFaceNormals();
        geo.computeVertexNormals();
        meh.material.side = THREE.DoubleSide;
        meh.receiveShadow = true;
        meh.castShadow = true;
        meh.renderOrder = 1;
        return meh;
    }

    get group() {
        return this._group;
    }

    set group(gv) {
        if (gv && this._group && this._group !== gv) {
            throw "models can only belong to one group";
        }
        this._group = gv;
    }

    opacity(ov) {
        let mat = this.mesh.material;
        if (ov === undefined) {
            return mat.opacity;
        }
        if (ov <= 0.0) {
            mat.transparent = false;
            mat.opacity = 1;
            mat.visible = false;
        } else {
            mat.transparent = ov < 1.0;
            mat.opacity = ov;
            mat.visible = true;
        }
        moto.Space.update();
    }

    wireframe(bool, opt = {}) {
        if (bool === undefined) {
            return this._wire ? {
                enabled: true,
                opacity: this._wireo,
                color: this._wire ? this._wire.material.color : undefined,
            } : {
                enabled: false
            };
        }
        if (this._wire) {
            this.mesh.remove(this._wire);
            this._wire = undefined;
            this.opacity(this._wireo);
        }
        if (bool) {
            this._wireo = this.opacity();
            this._wire = new THREE.LineSegments(
                new THREE.WireframeGeometry(this.mesh.geometry),
                new THREE.LineBasicMaterial({ color: opt.color || 0 }));
            this.mesh.add(this._wire);
            this.opacity(opt.opacity || 0);
        }
        moto.Space.update();
    }

    remove() {
        mesh.api.model.remove(this);
    }
};

})();