/**
 * Tests for the 'image/view.js' file.
 */
// Do not warn if these variables were not defined before.
/* global QUnit */
QUnit.module("view");

/**
 * Tests for {@link dwv.image.View} listeners.
 * @function module:tests/image~listeners
 */
QUnit.test("Test listeners.", function (assert) {
    // create an image
    var size0 = 4;
    var imgSize0 = new dwv.image.Size(size0, size0, 1);
    var imgSpacing0 = new dwv.image.Spacing(1, 1, 1);
    var imgOrigin0 = new dwv.math.Point3D(0,0,0);
    var imgGeometry0 = new dwv.image.Geometry(imgOrigin0, imgSize0, imgSpacing0);
    var buffer0 = [];
    for(var i=0; i<size0*size0; ++i) {
        buffer0[i] = i;
    }
    var image0 = new dwv.image.Image(imgGeometry0, [buffer0]);
    image0.setMeta( { BitsStored: 8 } );
    // create a view
    var view0 = new dwv.image.View(image0);

    // listeners
    var listener1 = function(event){
        assert.equal( event.wc, 0, "Expected call to listener1.");
    };
    var listener2 = function(event){
        assert.equal( event.ww, 1, "Expected call to listener2.");
    };
    // with two listeners
    view0.addEventListener("wl-center-change", listener1 );
    view0.addEventListener("wl-center-change", listener2 );
    view0.setWindowLevel(0,1);
    // without listener2
    view0.removeEventListener("wl-center-change", listener2 );
    view0.setWindowLevel(0,2);
    // without listener1
    view0.removeEventListener("wl-center-change", listener1 );
    view0.setWindowLevel(1,1);
});

/**
 * Tests for {@link dwv.image.View} generateImageData MONO.
 * @function module:tests/image~generateImageDataMONO
 */
QUnit.test("Test generate data MONO.", function (assert) {
    // create an image
    var size0 = 2;
    var imgSize0 = new dwv.image.Size(size0, size0, 1);
    var imgSpacing0 = new dwv.image.Spacing(1, 1, 1);
    var imgOrigin0 = new dwv.math.Point3D(0,0,0);
    var imgGeometry0 = new dwv.image.Geometry(imgOrigin0, imgSize0, imgSpacing0);
    var buffer0 = [];
    for ( var i = 0; i < size0 * size0; ++i ) {
        buffer0[i] = i;
    }
    var image0 = new dwv.image.Image(imgGeometry0, [buffer0]);
    image0.setMeta( { 'BitsStored': 8 } );
    // create a view
    var view0 = new dwv.image.View(image0);
    // create the image data
    var imageData = {'width': size0, 'height': size0, 'data': new Uint8ClampedArray(size0*size0*4) };

    // default window level
    view0.setWindowLevelMinMax();
    // call generate data
    view0.generateImageData(imageData);
    // TODO proper data?
    var theoData0 = [ 0, 0, 0, 255, 127, 127, 127, 255,
                      255, 255, 255, 255, 255, 255, 255, 255 ];
    var testContent0 = true;
    for ( i = 0; i < size0*size0*4; ++i) {
        if ( theoData0[i] !== imageData.data[i] ) {
            testContent0 = false;
            break;
        }
    }
    assert.equal( testContent0, true, "check image data" );
});

/**
 * Tests for {@link dwv.image.View} generateImageData RGB.
 * @function module:tests/image~generateImageDataRGB
 */
QUnit.test("Test generate data RGB.", function (assert) {
    // create an image
    var size0 = 2;
    var imgSize0 = new dwv.image.Size(size0, size0, 1);
    var imgSpacing0 = new dwv.image.Spacing(1, 1, 1);
    var imgOrigin0 = new dwv.math.Point3D(0,0,0);
    var imgGeometry0 = new dwv.image.Geometry(imgOrigin0, imgSize0, imgSpacing0);
    var buffer0 = [];
    var index = 0;
    var value = 0;
    // 0, 85, 170, 255
    for ( var i = 0; i < size0 * size0; ++i ) {
        value = i * 255 / ((size0 * size0) - 1);
        buffer0[index] = value;
        buffer0[index+1] = value;
        buffer0[index+2] = value;
        index += 3;
    }
    var image0 = new dwv.image.Image(imgGeometry0, [buffer0]);
    image0.setPhotometricInterpretation('RGB');
    image0.setMeta( { 'BitsStored': 8 } );
    // create a view
    var view0 = new dwv.image.View(image0);
    // create the image data
    var imageData = {'width': size0, 'height': size0, 'data': new Uint8ClampedArray(size0*size0*4) };

    // default window level
    view0.setWindowLevel(127, 255);
    // call generate data
    view0.generateImageData(imageData);
    // check data content
    var theoData0 = [ 0, 0, 0, 255, 85, 85, 85, 255,
                      171, 171, 171, 255, 255, 255, 255, 255 ];
    var testContent0 = true;
    for ( i = 0; i < size0*size0*4; ++i) {
        if ( theoData0[i] !== imageData.data[i] ) {
            testContent0 = false;
            break;
        }
    }
    assert.equal( testContent0, true, "check image data non planar" );

    var buffer1 = [];
    index = 0;
    // 0, 85, 170, 255
    for ( i = 0; i < size0 * size0; ++i ) {
        buffer1[index] = 0;
        buffer1[index+1] = 85;
        buffer1[index+2] = 170;
        buffer1[index+3] = 255;
        index += 4;
    }
    var image1 = new dwv.image.Image(imgGeometry0, [buffer1]);
    image1.setPhotometricInterpretation('RGB');
    image1.setPlanarConfiguration(1);
    image1.setMeta( { 'BitsStored': 8 } );
    // create a view
    var view1 = new dwv.image.View(image1);

    // default window level
    view1.setWindowLevel(127, 255);
    // call generate data
    view1.generateImageData(imageData);
    // check data content
    var testContent1 = true;
    for ( i = 0; i < size0*size0*4; ++i) {
        if ( theoData0[i] !== imageData.data[i] ) {
            testContent1 = false;
            break;
        }
    }
    assert.equal( testContent1, true, "check image data planar" );
});

/**
 * Tests for {@link dwv.image.View} generateImageData timing.
 * @function module:tests/image~generateImageDataTiming
 */
QUnit.test("Test generate data timing.", function (assert) {
    // create an image
    var size0 = 128;
    var imgSize0 = new dwv.image.Size(size0, size0, 1);
    var imgSpacing0 = new dwv.image.Spacing(1, 1, 1);
    var imgOrigin0 = new dwv.math.Point3D(0,0,0);
    var imgGeometry0 = new dwv.image.Geometry(imgOrigin0, imgSize0, imgSpacing0);
    var buffer0 = [];
    for(var i=0; i<size0*size0; ++i) {
        buffer0[i] = i;
    }
    var image0 = new dwv.image.Image(imgGeometry0, [buffer0]);
    image0.setMeta( { BitsStored: 8 } );
    // create a view
    var view0 = new dwv.image.View(image0);
    // create the image data
    var imageData = {"width": size0, "height": size0, "data": new Uint8Array(size0*size0*4) };

    // default window level
    view0.setWindowLevelMinMax();

    // start time
    var start0 = new Date();
    // call generate data
    view0.generateImageData(imageData);
    // time taken
    var time0 = (new Date()) - start0;
    // check time taken
    assert.ok( time0 < 90, "First generateImageData: "+time0+"ms.");

    // Change the window level
    view0.setWindowLevel(4000, 200);

    // start time
    var start1 = (new Date()).getMilliseconds();
    // call generate data
    view0.generateImageData(imageData);
    // time taken
    var time1 = (new Date()).getMilliseconds() - start1;
    // check time taken
    assert.ok( time1 < 90, "Second generateImageData: "+time1+"ms.");
});