import json
import logging
import os
import socket
import sys
import typing
from pathlib import Path
from unittest.mock import MagicMock

if sys.version_info < (3, 8):  # pragma: py-gte-38
    from typing_extensions import Literal
else:  # pragma: py-lt-38
    from typing import Literal

import pytest
import yaml
from asgiref.typing import ASGIApplication, ASGIReceiveCallable, ASGISendCallable, Scope
from pytest_mock import MockerFixture

from tests.utils import as_cwd
from uvicorn._types import Environ, StartResponse
from uvicorn.config import Config
from uvicorn.middleware.debug import DebugMiddleware
from uvicorn.middleware.proxy_headers import ProxyHeadersMiddleware
from uvicorn.middleware.wsgi import WSGIMiddleware
from uvicorn.protocols.http.h11_impl import H11Protocol


@pytest.fixture
def mocked_logging_config_module(mocker: MockerFixture) -> MagicMock:
    return mocker.patch("logging.config")


@pytest.fixture
def json_logging_config(logging_config: dict) -> str:
    return json.dumps(logging_config)


@pytest.fixture
def yaml_logging_config(logging_config: dict) -> str:
    return yaml.dump(logging_config)


async def asgi_app(
    scope: Scope, receive: ASGIReceiveCallable, send: ASGISendCallable
) -> None:
    pass  # pragma: nocover


def wsgi_app(environ: Environ, start_response: StartResponse) -> None:
    pass  # pragma: nocover


def test_debug_app() -> None:
    config = Config(app=asgi_app, debug=True, proxy_headers=False)
    config.load()

    assert config.debug is True
    assert isinstance(config.loaded_app, DebugMiddleware)


@pytest.mark.parametrize(
    "app, expected_should_reload",
    [(asgi_app, False), ("tests.test_config:asgi_app", True)],
)
def test_config_should_reload_is_set(
    app: ASGIApplication, expected_should_reload: bool
) -> None:
    config_debug = Config(app=app, debug=True)
    assert config_debug.debug is True
    assert config_debug.should_reload is expected_should_reload

    config_reload = Config(app=app, reload=True)
    assert config_reload.reload is True
    assert config_reload.should_reload is expected_should_reload


def test_should_warn_on_invalid_reload_configuration(
    tmp_path: Path, caplog: pytest.LogCaptureFixture
) -> None:
    config_class = Config(app=asgi_app, reload_dirs=[str(tmp_path)])
    assert not config_class.should_reload
    assert len(caplog.records) == 1
    assert (
        caplog.records[-1].message
        == "Current configuration will not reload as not all conditions are met,"
        "please refer to documentation."
    )

    config_no_reload = Config(
        app="tests.test_config:asgi_app", reload_dirs=[str(tmp_path)]
    )
    assert not config_no_reload.should_reload
    assert len(caplog.records) == 2
    assert (
        caplog.records[-1].message
        == "Current configuration will not reload as not all conditions are met,"
        "please refer to documentation."
    )


def test_reload_dir_is_set(
    reload_directory_structure: Path, caplog: pytest.LogCaptureFixture
) -> None:
    app_dir = reload_directory_structure / "app"
    with caplog.at_level(logging.INFO):
        config = Config(
            app="tests.test_config:asgi_app", reload=True, reload_dirs=[str(app_dir)]
        )
        assert len(caplog.records) == 1
        assert (
            caplog.records[-1].message
            == f"Will watch for changes in these directories: {[str(app_dir)]}"
        )
        assert config.reload_dirs == [app_dir]
        config = Config(
            app="tests.test_config:asgi_app", reload=True, reload_dirs=str(app_dir)
        )
        assert config.reload_dirs == [app_dir]


def test_non_existant_reload_dir_is_not_set(
    reload_directory_structure: Path, caplog: pytest.LogCaptureFixture
) -> None:
    with as_cwd(reload_directory_structure), caplog.at_level(logging.WARNING):
        config = Config(
            app="tests.test_config:asgi_app", reload=True, reload_dirs=["reload"]
        )
        assert config.reload_dirs == [reload_directory_structure]
        assert (
            caplog.records[-1].message
            == "Provided reload directories ['reload'] did not contain valid "
            + "directories, watching current working directory."
        )


def test_reload_subdir_removal(reload_directory_structure: Path) -> None:
    app_dir = reload_directory_structure / "app"

    reload_dirs = [str(reload_directory_structure), "app", str(app_dir)]

    with as_cwd(reload_directory_structure):
        config = Config(
            app="tests.test_config:asgi_app", reload=True, reload_dirs=reload_dirs
        )
        assert config.reload_dirs == [reload_directory_structure]


def test_reload_included_dir_is_added_to_reload_dirs(
    reload_directory_structure: Path,
) -> None:
    app_dir = reload_directory_structure / "app"
    ext_dir = reload_directory_structure / "ext"

    with as_cwd(reload_directory_structure):
        config = Config(
            app="tests.test_config:asgi_app",
            reload=True,
            reload_dirs=[str(app_dir)],
            reload_includes=["*.js", str(ext_dir)],
        )
        assert frozenset(config.reload_dirs), frozenset([app_dir, ext_dir])
        assert frozenset(config.reload_includes) == frozenset(["*.js", str(ext_dir)])


def test_reload_dir_subdirectories_are_removed(
    reload_directory_structure: Path,
) -> None:
    app_dir = reload_directory_structure / "app"
    app_sub_dir = app_dir / "sub"
    ext_dir = reload_directory_structure / "ext"
    ext_sub_dir = ext_dir / "sub"

    with as_cwd(reload_directory_structure):
        config = Config(
            app="tests.test_config:asgi_app",
            reload=True,
            reload_dirs=[
                str(app_dir),
                str(app_sub_dir),
                str(ext_sub_dir),
                str(ext_dir),
            ],
        )
        assert frozenset(config.reload_dirs) == frozenset([app_dir, ext_dir])


def test_reload_excluded_subdirectories_are_removed(
    reload_directory_structure: Path,
) -> None:
    app_dir = reload_directory_structure / "app"
    app_sub_dir = app_dir / "sub"

    with as_cwd(reload_directory_structure):
        config = Config(
            app="tests.test_config:asgi_app",
            reload=True,
            reload_excludes=[str(app_dir), str(app_sub_dir)],
        )
        assert frozenset(config.reload_dirs) == frozenset([reload_directory_structure])
        assert frozenset(config.reload_dirs_excludes) == frozenset([app_dir])
        assert frozenset(config.reload_excludes) == frozenset(
            [str(app_dir), str(app_sub_dir)]
        )


def test_reload_includes_exclude_dir_patterns_are_matched(
    reload_directory_structure: Path, caplog: pytest.LogCaptureFixture
) -> None:
    with caplog.at_level(logging.INFO):
        first_app_dir = reload_directory_structure / "app_first" / "src"
        second_app_dir = reload_directory_structure / "app_second" / "src"

        with as_cwd(reload_directory_structure):
            config = Config(
                app="tests.test_config:asgi_app",
                reload=True,
                reload_includes=["*/src"],
                reload_excludes=["app", "*third*"],
            )
            assert len(caplog.records) == 1
            assert (
                caplog.records[-1].message
                == "Will watch for changes in these directories: "
                f"{sorted([str(first_app_dir), str(second_app_dir)])}"
            )
            assert frozenset(config.reload_dirs) == frozenset(
                [first_app_dir, second_app_dir]
            )
            assert config.reload_includes == ["*/src"]


def test_wsgi_app() -> None:
    config = Config(app=wsgi_app, interface="wsgi", proxy_headers=False)
    config.load()

    assert isinstance(config.loaded_app, WSGIMiddleware)
    assert config.interface == "wsgi"
    assert config.asgi_version == "3.0"


def test_proxy_headers() -> None:
    config = Config(app=asgi_app)
    config.load()

    assert config.proxy_headers is True
    assert isinstance(config.loaded_app, ProxyHeadersMiddleware)


def test_app_unimportable_module() -> None:
    config = Config(app="no.such:app")
    with pytest.raises(ImportError):
        config.load()


def test_app_unimportable_other(caplog: pytest.LogCaptureFixture) -> None:
    config = Config(app="tests.test_config:app")
    with pytest.raises(SystemExit):
        config.load()
    error_messages = [
        record.message
        for record in caplog.records
        if record.name == "uvicorn.error" and record.levelname == "ERROR"
    ]
    assert (
        'Error loading ASGI app. Attribute "app" not found in module "tests.test_config".'  # noqa: E501
        == error_messages.pop(0)
    )


def test_app_factory(caplog: pytest.LogCaptureFixture) -> None:
    def create_app() -> ASGIApplication:
        return asgi_app

    config = Config(app=create_app, factory=True, proxy_headers=False)
    config.load()
    assert config.loaded_app is asgi_app

    # Flag not passed. In this case, successfully load the app, but issue a warning
    # to indicate that an explicit flag is preferred.
    caplog.clear()
    config = Config(app=create_app, proxy_headers=False)
    with caplog.at_level(logging.WARNING):
        config.load()
    assert config.loaded_app is asgi_app
    assert len(caplog.records) == 1
    assert "--factory" in caplog.records[0].message

    # App not a no-arguments callable.
    config = Config(app=asgi_app, factory=True)
    with pytest.raises(SystemExit):
        config.load()


def test_concrete_http_class() -> None:
    config = Config(app=asgi_app, http=H11Protocol)
    config.load()
    assert config.http_protocol_class is H11Protocol


def test_socket_bind() -> None:
    config = Config(app=asgi_app)
    config.load()
    sock = config.bind_socket()
    assert isinstance(sock, socket.socket)
    sock.close()


def test_ssl_config(
    tls_ca_certificate_pem_path: str,
    tls_ca_certificate_private_key_path: str,
) -> None:
    config = Config(
        app=asgi_app,
        ssl_certfile=tls_ca_certificate_pem_path,
        ssl_keyfile=tls_ca_certificate_private_key_path,
    )
    config.load()

    assert config.is_ssl is True


def test_ssl_config_combined(tls_certificate_key_and_chain_path: str) -> None:
    config = Config(
        app=asgi_app,
        ssl_certfile=tls_certificate_key_and_chain_path,
    )
    config.load()

    assert config.is_ssl is True


def asgi2_app(scope: Scope) -> typing.Callable:
    async def asgi(
        receive: ASGIReceiveCallable, send: ASGISendCallable
    ) -> None:  # pragma: nocover
        pass

    return asgi  # pragma: nocover


@pytest.mark.parametrize(
    "app, expected_interface", [(asgi_app, "3.0"), (asgi2_app, "2.0")]
)
def test_asgi_version(
    app: ASGIApplication, expected_interface: Literal["2.0", "3.0"]
) -> None:
    config = Config(app=app)
    config.load()
    assert config.asgi_version == expected_interface


@pytest.mark.parametrize(
    "use_colors, expected",
    [
        pytest.param(None, None, id="use_colors_not_provided"),
        pytest.param("invalid", None, id="use_colors_invalid_value"),
        pytest.param(True, True, id="use_colors_enabled"),
        pytest.param(False, False, id="use_colors_disabled"),
    ],
)
def test_log_config_default(
    mocked_logging_config_module: MagicMock,
    use_colors: typing.Optional[bool],
    expected: typing.Optional[bool],
    logging_config,
) -> None:
    """
    Test that one can specify the use_colors option when using the default logging
    config.
    """
    config = Config(app=asgi_app, use_colors=use_colors, log_config=logging_config)
    config.load()

    mocked_logging_config_module.dictConfig.assert_called_once_with(logging_config)

    (provided_dict_config,), _ = mocked_logging_config_module.dictConfig.call_args
    assert provided_dict_config["formatters"]["default"]["use_colors"] == expected


def test_log_config_json(
    mocked_logging_config_module: MagicMock,
    logging_config: dict,
    json_logging_config: str,
    mocker: MockerFixture,
) -> None:
    """
    Test that one can load a json config from disk.
    """
    mocked_open = mocker.patch(
        "uvicorn.config.open", mocker.mock_open(read_data=json_logging_config)
    )

    config = Config(app=asgi_app, log_config="log_config.json")
    config.load()

    mocked_open.assert_called_once_with("log_config.json")
    mocked_logging_config_module.dictConfig.assert_called_once_with(logging_config)


@pytest.mark.parametrize("config_filename", ["log_config.yml", "log_config.yaml"])
def test_log_config_yaml(
    mocked_logging_config_module: MagicMock,
    logging_config: dict,
    yaml_logging_config: str,
    mocker: MockerFixture,
    config_filename: str,
) -> None:
    """
    Test that one can load a yaml config from disk.
    """
    mocked_open = mocker.patch(
        "uvicorn.config.open", mocker.mock_open(read_data=yaml_logging_config)
    )

    config = Config(app=asgi_app, log_config=config_filename)
    config.load()

    mocked_open.assert_called_once_with(config_filename)
    mocked_logging_config_module.dictConfig.assert_called_once_with(logging_config)


def test_log_config_file(mocked_logging_config_module: MagicMock) -> None:
    """
    Test that one can load a configparser config from disk.
    """
    config = Config(app=asgi_app, log_config="log_config")
    config.load()

    mocked_logging_config_module.fileConfig.assert_called_once_with(
        "log_config", disable_existing_loggers=False
    )


@pytest.fixture(params=[0, 1])
def web_concurrency(request: pytest.FixtureRequest) -> typing.Iterator[int]:
    yield getattr(request, "param")
    if os.getenv("WEB_CONCURRENCY"):
        del os.environ["WEB_CONCURRENCY"]


@pytest.fixture(params=["127.0.0.1", "127.0.0.2"])
def forwarded_allow_ips(request: pytest.FixtureRequest) -> typing.Iterator[str]:
    yield getattr(request, "param")
    if os.getenv("FORWARDED_ALLOW_IPS"):
        del os.environ["FORWARDED_ALLOW_IPS"]


def test_env_file(
    web_concurrency: int,
    forwarded_allow_ips: str,
    caplog: pytest.LogCaptureFixture,
    tmp_path: Path,
) -> None:
    """
    Test that one can load environment variables using an env file.
    """
    fp = tmp_path / ".env"
    content = (
        f"WEB_CONCURRENCY={web_concurrency}\n"
        f"FORWARDED_ALLOW_IPS={forwarded_allow_ips}\n"
    )
    fp.write_text(content)
    with caplog.at_level(logging.INFO):
        config = Config(app=asgi_app, env_file=fp)
        config.load()

    assert config.workers == int(str(os.getenv("WEB_CONCURRENCY")))
    assert config.forwarded_allow_ips == os.getenv("FORWARDED_ALLOW_IPS")
    assert len(caplog.records) == 1
    assert f"Loading environment from '{fp}'" in caplog.records[0].message


@pytest.mark.parametrize(
    "access_log, handlers",
    [
        pytest.param(True, 1, id="access log enabled should have single handler"),
        pytest.param(False, 0, id="access log disabled shouldn't have handlers"),
    ],
)
def test_config_access_log(access_log: bool, handlers: int) -> None:
    config = Config(app=asgi_app, access_log=access_log)
    config.load()

    assert len(logging.getLogger("uvicorn.access").handlers) == handlers
    assert config.access_log == access_log


@pytest.mark.parametrize("log_level", [5, 10, 20, 30, 40, 50])
def test_config_log_level(log_level: int) -> None:
    config = Config(app=asgi_app, log_level=log_level)
    config.load()

    assert logging.getLogger("uvicorn.error").level == log_level
    assert logging.getLogger("uvicorn.access").level == log_level
    assert logging.getLogger("uvicorn.asgi").level == log_level
    assert config.log_level == log_level


def test_ws_max_size() -> None:
    config = Config(app=asgi_app, ws_max_size=1000)
    config.load()
    assert config.ws_max_size == 1000


@pytest.mark.parametrize(
    "reload, workers",
    [
        (True, 1),
        (False, 2),
    ],
    ids=["--reload=True --workers=1", "--reload=False --workers=2"],
)
@pytest.mark.skipif(sys.platform == "win32", reason="require unix-like system")
def test_bind_unix_socket_works_with_reload_or_workers(
    tmp_path, reload, workers
):  # pragma: py-win32
    uds_file = tmp_path / "uvicorn.sock"
    config = Config(
        app=asgi_app, uds=uds_file.as_posix(), reload=reload, workers=workers
    )
    config.load()
    sock = config.bind_socket()
    assert isinstance(sock, socket.socket)
    assert sock.family == socket.AF_UNIX
    assert sock.getsockname() == uds_file.as_posix()
    sock.close()


@pytest.mark.parametrize(
    "reload, workers",
    [
        (True, 1),
        (False, 2),
    ],
    ids=["--reload=True --workers=1", "--reload=False --workers=2"],
)
@pytest.mark.skipif(sys.platform == "win32", reason="require unix-like system")
def test_bind_fd_works_with_reload_or_workers(reload, workers):  # pragma: py-win32
    fdsock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
    fd = fdsock.fileno()
    config = Config(app=asgi_app, fd=fd, reload=reload, workers=workers)
    config.load()
    sock = config.bind_socket()
    assert isinstance(sock, socket.socket)
    assert sock.family == socket.AF_UNIX
    assert sock.getsockname() == ""
    sock.close()
    fdsock.close()