# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from pathlib import Path
from unittest import mock
from unittest.mock import Mock, patch

import conftest  # noqa: F401
import pytest
from mozunit import main

import mach.decorators
import mach.registrar
from mach.requirements import MachEnvRequirements
from mach.site import MozSiteMetadata, SitePackagesSource
from mutlh.decorators import Command, CommandArgument, MutlhCommandBase
from mutlh.site import MutlhCommandSiteManager


@pytest.fixture
def registrar(monkeypatch):
    test_registrar = mach.registrar.MachRegistrar()
    test_registrar.register_category("testing", "Mach unittest", "Testing for mach decorators")
    monkeypatch.setattr(mach.decorators, "Registrar", test_registrar)
    return test_registrar


def test_register_command_with_argument(registrar):
    inner_function = Mock()
    context = Mock()
    context.cwd = "."

    @Command("cmd_foo", category="testing")
    @CommandArgument("--arg", default=None, help="Argument help.")
    def run_foo(command_context, arg):
        inner_function(arg)

    registrar.dispatch("cmd_foo", context, arg="argument")

    inner_function.assert_called_with("argument")


def test_register_command_sets_up_class_at_runtime(registrar):
    inner_function = Mock()

    context = Mock()
    context.cwd = "."

    # We test that the virtualenv is set up properly dynamically on
    # the instance that actually runs the command.
    @Command("cmd_foo", category="testing", virtualenv_name="env_foo")
    def run_foo(command_context):
        assert Path(command_context.virtualenv_manager.virtualenv_root).name == "env_foo"
        inner_function("foo")

    @Command("cmd_bar", category="testing", virtualenv_name="env_bar")
    def run_bar(command_context):
        assert Path(command_context.virtualenv_manager.virtualenv_root).name == "env_bar"
        inner_function("bar")

    def from_environment_patch(topsrcdir: str, state_dir: str, virtualenv_name, directory: str):
        return MutlhCommandSiteManager(
            "",
            "",
            virtualenv_name,
            virtualenv_name,
            MozSiteMetadata(0, "mach", SitePackagesSource.VENV, "", ""),
            True,
            MachEnvRequirements(),
        )

    with mock.patch.object(MutlhCommandSiteManager, "from_environment", from_environment_patch):
        with patch.object(MutlhCommandBase, "activate_virtualenv"):
            registrar.dispatch("cmd_foo", context)
            inner_function.assert_called_with("foo")
            registrar.dispatch("cmd_bar", context)
            inner_function.assert_called_with("bar")


if __name__ == "__main__":
    main()