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# SPDX-License-Identifier: AGPL-3.0-or-later

# Repository tests
#
# This file is part of Hydrilla
#
# Copyright (C) 2021, 2022 Wojtek Kosior
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# 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 Affero 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 <https://www.gnu.org/licenses/>.
#
#
# I, Wojtek Kosior, thereby promise not to sue for violation of this
# file's license. Although I request that you do not make use this code
# in a proprietary program, I am not going to enforce this in court.

import pytest
import sys
import shutil
import json

from pathlib import Path
from hashlib import sha256
from tempfile import TemporaryDirectory
from typing import Iterable, Callable

from flask.testing import FlaskClient
from markupsafe import escape

from hydrilla import util as hydrilla_util
from hydrilla.builder import Build
from hydrilla.server import create_app

here        = Path(__file__).resolve().parent
config_path = here / 'development_config.json'
source_path = here / 'source-package-example'

@pytest.fixture(scope="session")
def default_setup() -> Iterable[dict[str, Path]]:
    with TemporaryDirectory() as tmpdir:
        setup = {
            'malcontent_dir': Path(tmpdir) / 'sample_malcontent',
            'config_path':    Path(tmpdir) / 'config.json',
            'containing_dir': Path(tmpdir)
        }

        setup['config_path'].symlink_to(config_path)

        build = Build(source_path, Path('index.json'))
        build.write_package_files(setup['malcontent_dir'])

        yield setup

@pytest.fixture(scope="session")
def client(default_setup: dict[str, Path]) -> Iterable[FlaskClient]:
    """Provide app client that serves the object from built sample package."""
    app = create_app(default_setup['config_path'],
                     flask_config={'TESTING': True})

    with app.test_client() as client:
        yield client

@pytest.fixture(scope="session")
def development_config(default_setup) -> Iterable[dict]:
    """Provide the contents of JSON config file fed to the client."""
    contents = default_setup['config_path'].read_text()
    yield json.loads(hydrilla_util.strip_json_comments(contents))

def test_project_url(client: FlaskClient, development_config: dict) -> None:
    """Fetch index.html and verify project URL fro config is present there."""
    response = client.get('/')
    assert b'html' in response.data
    project_url = development_config['hydrilla_project_url']
    assert escape(project_url).encode() in response.data

@pytest.mark.parametrize('item_type', ['resource', 'mapping'])
def test_get_newest(client: FlaskClient, item_type: str) -> None:
    """
    Verify that
        GET '/{item_type}/{item_identifier}.json'
    returns proper definition that is also served at:
        GET '/{item_type}/{item_identifier}/{item_version}'
    """
    response = client.get(f'/{item_type}/helloapple.json')
    assert response.status_code == 200
    definition = json.loads(response.data.decode())
    assert definition['type']        == item_type
    assert definition['identifier']  == 'helloapple'

    response = client.get(f'/{item_type}/helloapple/2021.11.10')
    assert response.status_code == 200
    assert definition == json.loads(response.data.decode())

    hydrilla_util.validator_for(f'api_{item_type}_description-1.schema.json')\
                 .validate(definition)

@pytest.mark.parametrize('item_type', ['resource', 'mapping'])
def test_get_nonexistent(client: FlaskClient, item_type: str) -> None:
    """
    Verify that attempts to GET a JSON definition of a nonexistent item or item
    version result in 404.
    """
    response = client.get(f'/{item_type}/nonexistentapple.json')
    assert response.status_code == 404
    response = client.get(f'/{item_type}/helloapple/1.2.3.999')
    assert response.status_code == 404

@pytest.mark.parametrize('item_type', ['resource', 'mapping'])
def test_file_refs(client: FlaskClient, item_type: str) -> None:
    """
    Verify that files referenced by definitions are accessible under their
    proper URLs and that their hashes match.
    """
    response = client.get(f'/{item_type}/helloapple/2021.11.10')
    assert response.status_code == 200
    definition = json.loads(response.data.decode())

    for file_ref in [*definition.get('scripts', []),
                     *definition['source_copyright']]:
        hash_sum = file_ref["sha256"]
        response = client.get(f'/file/sha256-{hash_sum}')

        assert response.status_code == 200
        assert sha256(response.data).digest().hex() == hash_sum

def test_empty_query(client: FlaskClient) -> None:
    """
    Verify that querying mappings for URL gives an empty list when there're no
    mathes.
    """
    response = client.get(f'/query?url=https://nonexiste.nt/example')
    assert response.status_code == 200

    response_object = json.loads(response.data.decode())

    assert response_object['mappings'] == []

    hydrilla_util.validator_for('api_query_result-1.schema.json')\
                 .validate(response_object)

def test_query(client: FlaskClient) -> None:
    """
    Verify that querying mappings for URL gives a list with reference(s) the the
    matching mapping(s).
    """
    response = client.get(f'/query?url=https://hydrillabugs.koszko.org/')
    assert response.status_code == 200

    response_object = json.loads(response.data.decode())

    assert response_object['mappings'] == [{
        'identifier': 'helloapple',
        'long_name': 'Hello Apple',
        'version': [2021, 11, 10]
    }]

    hydrilla_util.validator_for('api_query_result-1.schema.json')\
                 .validate(response_object)

def test_source(client: FlaskClient) -> None:
    """Verify source descriptions are properly served."""
    response = client.get(f'/source/hello.json')
    assert response.status_code == 200

    description = json.loads(response.data.decode())
    assert description['source_name'] == 'hello'

    assert sorted([d['identifier'] for d in description['definitions']]) == \
        ['hello-message', 'helloapple', 'helloapple']

    zipfile_hash = description['source_archives']['zip']['sha256']
    response = client.get(f'/source/hello.zip')
    assert sha256(response.data).digest().hex() == zipfile_hash

    hydrilla_util.validator_for('api_source_description-1.schema.json')\
                 .validate(description)

def test_missing_source(client: FlaskClient) -> None:
    """Verify requests for nonexistent sources result in 404."""
    response = client.get(f'/source/nonexistent.json')
    assert response.status_code == 404

    response = client.get(f'/source/nonexistent.zip')
    assert response.status_code == 404

def test_normalize_version():
    assert hydrilla_util.normalize_version([4, 5, 3, 0, 0]) == [4, 5, 3]
    assert hydrilla_util.normalize_version([1, 0, 5, 0])    == [1, 0, 5]
    assert hydrilla_util.normalize_version([3, 3])          == [3, 3]