class Visual {
    constructor() {
        this.data = []; //for drawing
        this.dataArray = [];
    }

    updateData() {

    }

    draw() {
    }

    setup() {
    }
}

class VisualDrawer {
    constructor() {
        this.visuals = {
            "sphere": new Sphere(),
            "wave": new Wave(),
            "water": new Water()
        }
    }

    init() {
        this.switch('wave');
        this.updateLoop();
    }

    switch(visual) {
        if (this.visuals[visual] != null) {
            this.c = visual;
            vConf.loadConfigByName(this.c);
            this.visuals[this.c].setup();
        }
    }

    updateLoop() {
        let self = this;
        let pro = shaderHandler.use(self.c);
        let vis = self.visuals[self.c];
        vis.updateData();
        this.prepare();
        vis.draw(pro);
        requestAnimationFrame(self.updateLoop.bind(self))
    }

    prepare() {
        c.width = window.innerWidth;
        c.height = window.innerHeight;
        gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
        gl.clearColor(0, 0, 0, parseFloat(pConf.get("alphaValue", 0)));
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
        gl.enable(gl.DEPTH_TEST);
        gl.depthFunc(gl.LEQUAL);
        gl.enable(gl.CULL_FACE);
    }
}