# Copyright (C) 2016-2023 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program 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
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import time
import pytest
import rhodecode
import os
import shutil
from tempfile import mkdtemp

from rhodecode.lib import archive_cache


def file_reader(temp_store):
    with open(temp_store, 'w') as f:
        for cnt in range(10000):
            f.write(str(cnt))
    return open(temp_store, 'rb')


@pytest.fixture()
def d_cache_instance(ini_settings):
    config = ini_settings
    d_cache = archive_cache.get_archival_cache_store(config=config, always_init=True)
    return d_cache


@pytest.mark.usefixtures('app')
class TestArchiveCaches(object):

    def test_archivecache_empty_stats(self, d_cache_instance):
        d_cache = d_cache_instance
        shutil.rmtree(d_cache._directory)

        stats = d_cache.get_statistics()
        assert (0, 0, {}) == stats

    def test_archivecache_store_keys(self, d_cache_instance, tmp_path):
        d_cache = d_cache_instance
        shutil.rmtree(d_cache._directory)

        for n in range(100):

            archive_name = f'my-archive-abc-{n}.zip'
            temp_archive_path = os.path.join(tmp_path, archive_name)
            d_cache.store(archive_name, file_reader(temp_archive_path ), {'foo': 'bar'})
            reader, meta = d_cache.fetch(archive_name)
            content = reader.read()
            assert content == open(temp_archive_path, 'rb').read()

        stats = d_cache.get_statistics()
        assert (100, 3889000, {}) == stats

    def test_archivecache_remove_keys(self, d_cache_instance, tmp_path):
        d_cache = d_cache_instance
        shutil.rmtree(d_cache._directory)

        n = 1
        archive_name = f'my-archive-abc-{n}.zip'
        temp_archive_path = os.path.join(tmp_path, archive_name)

        d_cache.store(archive_name, file_reader(temp_archive_path ), {'foo': 'bar'})
        stats = d_cache.get_statistics()
        assert (1, 38890, {}) == stats

        assert 1 == d_cache.remove(archive_name)

        stats = d_cache.get_statistics()
        assert (0, 0, {}) == stats

    def test_archivecache_evict_keys(self, d_cache_instance, tmp_path):
        d_cache = d_cache_instance
        shutil.rmtree(d_cache._directory)
        tries = 500
        for n in range(tries):

            archive_name = f'my-archive-abc-{n}.zip'
            temp_archive_path = os.path.join(tmp_path, archive_name)
            d_cache.store(archive_name, file_reader(temp_archive_path ), {'foo': 'bar'})

        stats = d_cache.get_statistics()
        assert (tries, 19445000, {}) == stats
        evict_to = 0.005  # around (5mb)
        evicted_items = d_cache.evict(size_limit=d_cache.gb_to_bytes(evict_to))
        evicted = 361
        assert {'removed_items': evicted, 'removed_size': 14039290} == evicted_items

        stats = d_cache.get_statistics()
        assert (tries - evicted, 5405710, {}) == stats