"use strict";

const ElevatorMaterialGame = (function(){

    const ElevatorMaterialGame = function(hollow_bond){

        let cabin_mat = null;
        let light_mat = null;

        this.get_cabin_material = () => {
            if(cabin_mat) return cabin_mat;

            const def = (hollow_bond.theme && hollow_bond.theme.elevator_cabin) ? hollow_bond.theme.elevator_cabin : {
                vertex: `
                    varying vec3 vNormal;
                    void main(){
                        vNormal = normalize(normalMatrix * normal);
                        gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
                    }
                `,
                fragment: `
                    varying vec3 vNormal;
                    void main(){
                        gl_FragColor = vec4(vec3(0.35) + abs(vNormal.y) * 0.1, 1.0);
                    }
                `
            };

            cabin_mat = new THREE.ShaderMaterial({
                vertexShader: def.vertex,
                fragmentShader: def.fragment,
                side: THREE.DoubleSide
            });

            return cabin_mat;
        };

        this.get_light_material = () => {
            if(light_mat) return light_mat;

            const def = (hollow_bond.theme && hollow_bond.theme.elevator_light) ? hollow_bond.theme.elevator_light : {
                vertex: `
                    void main(){ gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0); }
                `,
                fragment: `
                    void main(){ gl_FragColor = vec4(0.95, 0.92, 0.82, 1.0); }
                `
            };

            light_mat = new THREE.ShaderMaterial({
                vertexShader: def.vertex,
                fragmentShader: def.fragment,
                side: THREE.DoubleSide
            });

            return light_mat;
        };

        this.reset = () => {
            if(cabin_mat){ cabin_mat.dispose(); cabin_mat = null; }
            if(light_mat){ light_mat.dispose(); light_mat = null; }
        };

    };

    return ElevatorMaterialGame;
})();