<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script>

const makeModel = () => {
    const source = document.createElement("source");
    source.src = "resources/cube.usdz";
    const model = document.createElement("model");
    model.appendChild(source);
    return model;
}

const bodyAvailability = async () => {
    return new Promise(resolve => {
        if (document.body)
            resolve();
        else
            window.addEventListener("DOMContentLoaded", event => resolve());
    });
};

const readyModel = async (test) => {
    await bodyAvailability();
    const model = document.body.appendChild(makeModel());
    test.add_cleanup(() => model.remove());
    await model.ready;
    return model;
};

const epsilon = 0.001;
const expectedCamera = { pitch: 10, yaw: 40, scale: 2 };

test(() => {
    const model = document.createElement("model");
    assert_idl_attribute(model, "getCamera", "getCamera() is defined");
    assert_idl_attribute(model, "setCamera", "setCamera() is defined");
}, "<model> has getCamera() and setCamera() methods");

promise_test(async test => {
    // Right now, a <model> won't be ready until it's added to the document
    // since it requires a renderer to create the supporting ModelPlayer.
    // But this means an initial camera can't be set, we should think about
    // whether this is what we want. But since this is the current behavior,
    // let's make sure to test it.
    const model = makeModel();

    const getCameraPromise = model.getCamera();
    await promise_rejects(test, "AbortError", getCameraPromise,
                              "The promise returned by getCamera() should be rejected if the model element is not ready.");

    const setCameraPromise = model.setCamera(expectedCamera);
    await promise_rejects(test, "AbortError", setCameraPromise,
                            "The promise returned by setCamera() should be rejected if the model element is not ready.");
}, "<model> cannot get or set the camera until it's ready");

promise_test(async test => {
    const model = await readyModel(test);
    await model.setCamera(expectedCamera);
    const actualCamera = await model.getCamera();
    assert_approx_equals(actualCamera.pitch, expectedCamera.pitch, epsilon, "Camera has expected pitch");
    assert_approx_equals(actualCamera.yaw, expectedCamera.yaw, epsilon, "Camera has expected yaw");
    assert_approx_equals(actualCamera.scale, expectedCamera.scale, epsilon, "Camera has expected scale");
}, "<model> can set the camera and read it back");

promise_test(async test => {
    const model = await readyModel(test);

    const expectCameraFailure = async (camera, description) => {
        return model.setCamera(camera).then(test.unreached_func("Should have rejected: " + description)).catch(error => {
            assert_true(error.toString().includes("TypeError"), description);
        });
    };

    await expectCameraFailure(undefined, "The camera should be rejected if it's undefined");
    await expectCameraFailure(null, "The camera should be rejected if it's null");
    await expectCameraFailure("", "The camera should be rejected if it's a string");
    await expectCameraFailure(1, "The camera should be rejected if it's a number");
    await expectCameraFailure({}, "The camera should be rejected if the camera is the empty object");
    await expectCameraFailure({ pitch: "pitch", yaw: "yaw", scale: "scale" }, "The camera should be rejected if the properties don't have the expected type");
    await expectCameraFailure({ pitch: 10, yaw: 10 }, "The camera should be rejected if all properties aren't set");
}, "<model> cannot set the camera if it's not a valid HTMLModelElementCamera");

</script>
</body>
</html>