import io

import cv2
import pytest
from CommonServerPython import *
from PIL import Image

IMAGE_NAME_JPG = "test_picture_jpg.jpg"
IMAGE_PATH_JPG = "test_data/test_picture_jpg.jpg"
IMAGE_NAME_PNG = "test_picture_png.png"
IMAGE_PATH_PNG = "test_data/test_picture_png.png"


IMAGE_DETAILS_CASES = [
    (
        IMAGE_PATH_JPG,
        50,
        70,
        {"format": "JPEG", "sizes": (50, 70)},  # expected
    ),
    (
        IMAGE_PATH_JPG,
        None,
        None,
        {"format": "JPEG", "sizes": None},  # expected
    ),
    (
        IMAGE_PATH_PNG,
        50,
        70,
        {"format": "PNG", "sizes": (50, 70)},  # expected
    ),
    (
        IMAGE_PATH_PNG,
        None,
        None,
        {"format": "PNG", "sizes": None},  # expected
    ),
]


@pytest.mark.parametrize("path, width, height, expected_results", IMAGE_DETAILS_CASES)
def test_get_image_details(path, width, height, expected_results):
    """
    Given:
        - mocker
    When:
        - Calling function get_image_details
    Then:
        - Validate image details returned as expected
    """
    from PreProcessImage import get_image_details

    format_, sizes = get_image_details(path, width, height)
    assert format_ == expected_results["format"]
    assert sizes == expected_results["sizes"]


FILES_DETAILS_CASES = [(1, IMAGE_PATH_JPG, IMAGE_NAME_JPG, 50, 70, "JPEG"), (1, IMAGE_PATH_PNG, IMAGE_NAME_PNG, 50, 70, "PNG")]


@pytest.mark.parametrize("entry_id, path, name, width, height, format_img", FILES_DETAILS_CASES)
def test_get_file_details(mocker, entry_id, path, name, width, height, format_img):
    """
    Given:
        - mocker
    When:
        - Calling function get_file_details
    Then:
        - Validate file details returned as expected
    """
    from unittest import mock

    from PreProcessImage import get_file_details

    def mock_file(_id):
        return {
            "path": path,
            "name": name,
        }

    mocker.patch.object(demisto, "getFilePath", side_effect=mock_file)
    mock_image_details = mocker.patch("PreProcessImage.get_image_details", return_value=(format_img, (width, height)))
    # Create a mock for Image.fromarray()
    mock_fromarray = mocker.patch("PIL.Image.fromarray")
    mock_final_orig_image = mock.MagicMock()
    mock_fromarray.return_value = mock_final_orig_image
    mocker.patch("os.path.splitext", return_value=(name, format_img))
    result_img, result_name, result_img_sizes, result_img_format = get_file_details(entry_id, width, height)
    assert mock_image_details.call_count == 1
    assert result_img_sizes == (width, height)
    assert result_name == name
    assert result_img_format == format_img
    assert result_img.any()
    with Image.open(path) as origin_image:
        expected_width, expected_height = origin_image.size
    assert result_img.shape == (expected_height, expected_width, 3)


ACTION_WRAP_CASES = [
    (IMAGE_PATH_JPG, IMAGE_NAME_JPG, "JPEG"),
    (IMAGE_PATH_JPG, IMAGE_NAME_JPG, "JPEG"),
    (IMAGE_PATH_JPG, IMAGE_NAME_JPG, "JPEG"),
    (IMAGE_PATH_PNG, IMAGE_NAME_PNG, "PNG"),
    (IMAGE_PATH_PNG, IMAGE_NAME_PNG, "PNG"),
    (IMAGE_PATH_PNG, IMAGE_NAME_PNG, "PNG"),
]


@pytest.mark.parametrize("image_path, image_name, format_img", ACTION_WRAP_CASES)
def test_grayscale(mocker, image_path, image_name, format_img):
    """
    Given:
    - An image in np.ndarray format.
    - An action to convert the image to grayscale.
    When:
    - Calling the action_wrap function.
    Then:
    - Ensure the function successfully converts the image to grayscale.
    """
    import PreProcessImage
    from PreProcessImage import action_wrap

    # Arrange
    args = {"action": "grayscale", "file_entry_id": "1", "image_resize_width": None, "image_resize_height": None}
    from unittest import mock

    mocker.patch.object(demisto, "getFilePath", return_value={"path": image_path, "name": image_name})
    mocker.patch.object(Image.Image, "resize")
    mocker.patch.object(io, "BytesIO")
    mocker.patch.object(cv2, "cvtColor")
    # Create a mock for Image.fromarray()
    mock_fromarray = mocker.patch("PIL.Image.fromarray")
    mock_final_orig_image = mock.MagicMock()
    mock_fromarray.return_value = mock_final_orig_image
    # Create a mock for Image.fromarray()
    mock_fromarray = mocker.patch("PIL.Image.fromarray")
    mock_final_orig_image = mock.MagicMock()
    mock_fromarray.return_value = mock_final_orig_image

    # Create a mock for io.BytesIO()
    mock_stream_orig = mock.MagicMock()
    # Create a mock for save() and seek() methods
    mocker.patch.object(mock_stream_orig, "save")
    mocker.patch.object(mock_stream_orig, "seek")
    mocker.patch.object(PreProcessImage, "fileResult", return_value=image_path)
    # Act
    action_wrap(args)
    assert cv2.cvtColor.call_args[0][1] == cv2.COLOR_BGR2GRAY
    assert Image.fromarray.call_args[0][0] == cv2.cvtColor.return_value
    assert mock_fromarray.call_count == 1


@pytest.mark.parametrize("image_path, image_name, format_img", ACTION_WRAP_CASES)
def test_sharpened(mocker, image_path, image_name, format_img):
    """
    Given:
    - An image in np.ndarray format.
    - An action to sharpen the image.
    When:
    - Calling the action_wrap function.
    Then:
    - Ensure the function successfully sharpens the image.
    """
    import io

    import PreProcessImage

    # Arrange
    args = {"action": "sharpened", "file_entry_id": "1", "image_resize_width": None, "image_resize_height": None}
    mocker.patch.object(demisto, "getFilePath", return_value={"path": image_path, "name": image_name})
    mocker.patch.object(Image, "fromarray")
    mocker.patch.object(Image.Image, "resize")
    # mocker.patch.object(Image.Image, 'save')
    mocker.patch.object(io, "BytesIO")
    mocker.patch.object(cv2, "filter2D")

    def mock_file(filename, data, file_type=None):
        return {
            "Contents": "",
            "ContentsFormat": formats["text"],
            "Type": entryTypes["file"],
            "File": f"sharpened_{image_name}",
            "FileID": "1",
        }

    mocker.patch.object(PreProcessImage, "fileResult", side_effect=mock_file)
    # Act
    result = PreProcessImage.action_wrap(args)
    # Assert
    assert result["Type"] == entryTypes["file"]
    assert result["File"].startswith("sharpened_")
    assert cv2.filter2D.call_args[0][0].any()
    assert cv2.filter2D.call_args[0][1] == -1
    assert cv2.filter2D.call_args[0][2].tolist()
    assert Image.fromarray.call_args[0][0].any()
    assert Image.Image.resize.call_count == 0


@pytest.mark.parametrize("image_path, image_name, format_img", ACTION_WRAP_CASES)
def test_original(mocker, image_path, image_name, format_img):
    """
    Given:
    - An image in np.ndarray format.
    - An action to return the original image.
    When:
    - Calling the action_wrap function.
    Then:
    - Ensure the function successfully returns the original image (and not preforms sharpening or grayscale).
    """
    from unittest import mock

    import PreProcessImage

    # Arrange
    args = {"action": "original", "file_entry_id": "1", "image_resize_width": 50, "image_resize_height": 50}
    mocker.patch.object(demisto, "getFilePath", return_value={"path": image_path, "name": image_name})
    mocker.patch.object(Image, "fromarray")
    mocker.patch.object(Image.Image, "resize")
    mocker.patch.object(Image.Image, "save")
    mocker.patch.object(io, "BytesIO")
    # Create a mock for image_resize()
    mock_image_sharpened = mocker.patch("PreProcessImage.sharpened")
    mock_sharpened_orig_image = mock.MagicMock()
    mock_image_sharpened.return_value = mock_sharpened_orig_image

    def mock_file(filename, data, file_type=None):
        return {
            "Contents": "",
            "ContentsFormat": formats["text"],
            "Type": entryTypes["file"],
            "File": f"original_{image_name}",
            "FileID": "1",
        }

    mocker.patch.object(PreProcessImage, "fileResult", side_effect=mock_file)
    # Act
    result = PreProcessImage.action_wrap(args)
    # Assert
    assert result["Type"] == entryTypes["file"]
    assert result["File"].startswith("original_")
    assert Image.fromarray.call_args[0][0].any()
    assert mock_image_sharpened.call_count == 0
    assert Image.Image.resize.call_count == 0


def test_invalid_action(mocker):
    """
    Given:
    - An invalid action.
    When:
    - Calling the action_wrap function.
    Then:
    - Ensure the function raises a DemistoException when an invalid action is provided.
    """
    # Arrange
    from PreProcessImage import action_wrap

    args = {"action": "invalid_action", "file_entry_id": "1", "image_resize_width": None, "image_resize_height": None}
    mocker.patch.object(demisto, "getFilePath", return_value={"path": IMAGE_PATH_JPG, "name": IMAGE_NAME_JPG})
    # Act & Assert
    with pytest.raises(DemistoException):
        action_wrap(args)