/* global QUnit, $, testLog */

(function() {
    var viewer;

    QUnit.module('ReferenceStrip', {
        beforeEach: function () {
            $('<div id="example"></div>').appendTo("#qunit-fixture");

            testLog.reset();
        },
        afterEach: function () {
            if (viewer){
                    let errors = viewer.drawer._numGlMaxTextureErrors;
                    if(errors > 0){
                        console.log('Number of times MAX_TEXTURE_IMAGE_UNITS had a bad value:', errors);
                    } else {
                        console.log('Num OK draw calls', viewer.drawer._numGlMaxTextureOks);
                    }
                    viewer.destroy();
                }

            viewer = null;
        }
    });

    // ----------
    var createViewer = function(options) {
        options = options || {};
        viewer = OpenSeadragon(OpenSeadragon.extend({
            id:            'example',
            prefixUrl:     '/build/openseadragon/images/',
            springStiffness: 100 // Faster animation = faster tests
        }, options));
    };

    // ----------
    QUnit.test('basics', function(assert) {
        var done = assert.async();
        createViewer({
            sequenceMode: true,
            showReferenceStrip: true,
            tileSources: [
                '/test/data/tall.dzi',
                '/test/data/wide.dzi',
            ]
        });

        assert.ok(viewer.referenceStrip, 'referenceStrip exists');
        done();
    });

    // ----------
    QUnit.test('shadow dom', function(assert) {
        if (document.head && document.head.attachShadow) {
            var done = assert.async();

            var shadowDiv = document.createElement('div');
            shadowDiv.attachShadow({
                mode: 'open'
            });
            shadowDiv.shadowRoot.innerHTML = `<div id="shadow-example"></div>`

            createViewer({
                element: shadowDiv.shadowRoot.querySelector('#shadow-example'),
                sequenceMode: true,
                showReferenceStrip: true,
                tileSources: [
                    '/test/data/tall.dzi',
                    '/test/data/wide.dzi'
                ]
            });

            $(shadowDiv).appendTo("#qunit-fixture");

            assert.ok(viewer.referenceStrip, 'referenceStrip exists');
            done();
        } else {
            assert.expect(0);
        }
    })

})();