#!/usr/bin/python
# -*- coding: utf-8 -*-

# Hive Appier Framework
# Copyright (c) 2008-2022 Hive Solutions Lda.
#
# This file is part of Hive Appier Framework.
#
# Hive Appier Framework is free software: you can redistribute it and/or modify
# it under the terms of the Apache License as published by the Apache
# Foundation, either version 2.0 of the License, or (at your option) any
# later version.
#
# Hive Appier Framework is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Apache License for more details.
#
# You should have received a copy of the Apache License along with
# Hive Appier Framework. If not, see <http://www.apache.org/licenses/>.

__author__ = "João Magalhães <joamag@hive.pt>"
""" The author(s) of the module """

__version__ = "1.0.0"
""" The version of the module """

__revision__ = "$LastChangedRevision$"
""" The revision number of the module """

__date__ = "$LastChangedDate$"
""" The last change date of the module """

__copyright__ = "Copyright (c) 2008-2022 Hive Solutions Lda."
""" The copyright for the module """

__license__ = "Apache License, Version 2.0"
""" The license for the module """

import appier

def resize_image(
    data,
    etag = None,
    width = None,
    height = None,
    format = None,
    quality = None
):
    import PIL.Image

    input_stream = appier.legacy.BytesIO(data)
    output_stream = appier.legacy.BytesIO()

    image = PIL.Image.open(input_stream)

    try:
        format = format if format else image.format

        image_width, image_height = image.size
        if width: ratio = float(image_width) / float(width)
        elif height: ratio = float(image_height) / float(height)
        else: ratio = 1.0

        if not width: width = int(image_width * ratio)
        if not height: height = int(image_height * ratio)

        image.thumbnail((width, height), PIL.Image.ANTIALIAS)
        image.save(output_stream, format, quality = quality)

        output_data = output_stream.getvalue()
    finally:
        input_stream.close()
        output_stream.close()
        image.close()

    etag = "%s-w%s-h%s" % (etag, str(width), str(height)) if etag else etag

    return (output_data, etag)
