#     Copyright 2026, Kay Hayen, mailto:kay.hayen@gmail.com find license text at end of file


"""Handling of images, esp. format conversions for icons."""

from nuitka.States import states

from .FileOperations import getFilenameExtension, hasFilenameExtension
from .Utils import isMacOS, isWin32Windows


def checkIconUsage(logger, icon_path):
    icon_format = getFilenameExtension(icon_path)

    if icon_format == "":
        return logger.sysexit("""\
Cannot detect the icon format from filename extension of '%s'.""" % (icon_path))

    if icon_format != ".icns" and isMacOS():
        needs_conversion = True
    elif icon_format != ".ico" and isWin32Windows():
        needs_conversion = True
    else:
        needs_conversion = False

    if needs_conversion:
        try:
            import imageio  # pylint: disable=I0021,import-error,unused-import
        except ImportError as e:
            if states.is_debug:
                logger.info("Exception importing 'imageio' is %s" % repr(e))

            return logger.sysexit("""\
Need to install 'imageio' to automatically convert the non native \
icon image (%s) in file in '%s'.""" % (icon_format[1:].upper(), icon_path))


def convertImageToIconFormat(logger, image_filename, converted_icon_filename):
    """Convert image file to icon file."""
    icon_format = converted_icon_filename.rsplit(".", 1)[1].lower()

    # Limit to supported icon formats.
    assert hasFilenameExtension(converted_icon_filename, (".ico", ".icns")), icon_format

    # Avoid importing unless actually used.
    import imageio  # pylint: disable=I0021,import-error

    try:
        image = imageio.imread(image_filename)
    except ValueError:
        return logger.sysexit(
            "Unsupported file format for 'imageio' in '%s', use e.g. PNG or other supported file formats instead."
            % image_filename
        )

    imageio.imwrite(converted_icon_filename, image)


#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the GNU Affero General Public License, Version 3 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        https://www.gnu.org/licenses/agpl-3.0.txt
#
#     See also: "Nuitka Runtime Library Exception, Version 1.0" in file
#     "LICENSE-RUNTIME.txt" for additional permissions granted under Section 7.
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
