const { Renderer } = require('../');
const { settings } = require('@pixi/settings');
const { ENV } = require('@pixi/constants');
const { skipHello } = require('@pixi/utils');

skipHello();

function withGL(fn)
{
    return !process.env.DISABLE_WEBGL ? (fn || true) : undefined;
}

describe('PIXI.Renderer', function ()
{
    it('setting option legacy should disable VAOs and SPRITE_MAX_TEXTURES', withGL(function ()
    {
        settings.PREFER_ENV = ENV.WEBGL_LEGACY;
        const renderer = new Renderer(1, 1);

        try
        {
            expect(renderer.geometry.hasVao).to.equal(false);
            // expect(renderer.plugins.sprite.MAX_TEXTURES).to.equal(1);
        }
        finally
        {
            renderer.destroy();
        }
        settings.PREFER_ENV = ENV.WEBGL2;
    }));

    it('should allow clear() to work despite no containers added to the renderer', withGL(function ()
    {
        const renderer = new Renderer(1, 1);

        try
        {
            renderer.clear();
        }
        finally
        {
            renderer.destroy();
        }
    }));

    describe('.setObjectRenderer()', function ()
    {
        if (withGL())
        {
            before(function ()
            {
                this.renderer = new Renderer();
            });

            beforeEach(function ()
            {
                this.curRenderer = {
                    start: sinon.spy(),
                    stop: sinon.spy(),
                };
                this.objRenderer = {
                    start: sinon.spy(),
                    stop: sinon.spy(),
                };
                this.renderer.batch.currentRenderer = this.curRenderer;
            });

            after(function ()
            {
                this.renderer.destroy();
                this.renderer = null;
                this.curRenderer = null;
                this.objRenderer = null;
            });
        }

        it('should set objectRenderer as new current renderer', withGL(function ()
        {
            this.renderer.batch.setObjectRenderer(this.objRenderer);
            expect(this.curRenderer.stop).to.be.calledOnce;
            expect(this.renderer.batch.currentRenderer).to.be.equal(this.objRenderer);
            expect(this.objRenderer.start).to.be.calledOnce;
        }));

        it('should do nothing if objectRenderer is already used as current', withGL(function ()
        {
            this.renderer.batch.setObjectRenderer(this.curRenderer);
            expect(this.renderer.batch.currentRenderer).to.be.equal(this.curRenderer);
            expect(this.curRenderer.stop).to.not.be.called;
            expect(this.curRenderer.start).to.not.be.called;
        }));
    });
});