import re
import sys
from io import StringIO
from textwrap import dedent
from unittest.mock import patch

from django.core.management import call_command
from django_components import CommandArg, CommandArgGroup, ComponentCommand, ComponentExtension
from django_components.testing import djc_test
from .testutils import setup_test_config

setup_test_config({"autodiscover": False})

# NOTE: Argparse changed how the optional args are displayed in Python 3.11+
if sys.version_info >= (3, 10):
    OPTIONS_TITLE = "options"
else:
    OPTIONS_TITLE = "optional arguments"


class EmptyExtension(ComponentExtension):
    name = "empty"


class DummyCommand(ComponentCommand):
    name = "dummy_cmd"
    help = "Dummy command description."

    arguments = [
        CommandArg(
            name_or_flags="--foo",
            help="Foo description.",
        ),
        CommandArgGroup(
            title="group bar",
            description="Group description.",
            arguments=[
                CommandArg(
                    name_or_flags="--bar",
                    help="Bar description.",
                ),
                CommandArg(
                    name_or_flags="--baz",
                    help="Baz description.",
                ),
            ],
        ),
    ]

    def handle(self, *args, **kwargs):
        kwargs.pop("_command")
        kwargs.pop("_parser")
        sorted_kwargs = dict(sorted(kwargs.items()))
        print(f"DummyCommand.handle: args={args}, kwargs={sorted_kwargs}")


class DummyExtension(ComponentExtension):
    name = "dummy"

    commands = [
        DummyCommand,
    ]


@djc_test
class TestExtensionsCommand:
    def test_root_command(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext")
        output = out.getvalue()

        assert (
            output
            == dedent(
                f"""
                usage: components ext [-h] {{list,run}} ...

                Run extension commands.

                {OPTIONS_TITLE}:
                  -h, --help  show this help message and exit

                subcommands:
                  {{list,run}}
                    list      List all extensions.
                    run       Run a command added by an extension.
                """
            ).lstrip()
        )


@djc_test
class TestExtensionsListCommand:
    def test_list_default_extensions(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "list")
        output = out.getvalue()

        assert output.strip() == (
            "name           \n"
            "===============\n"
            "cache          \n"
            "defaults       \n"
            "dependencies   \n"
            "view           \n"
            "debug_highlight"
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_list_extra_extensions(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "list")
        output = out.getvalue()

        assert output.strip() == (
            "name           \n"
            "===============\n"
            "cache          \n"
            "defaults       \n"
            "dependencies   \n"
            "view           \n"
            "debug_highlight\n"
            "empty          \n"
            "dummy"
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_list_all(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "list", "--all")
        output = out.getvalue()

        assert output.strip() == (
            "name           \n"
            "===============\n"
            "cache          \n"
            "defaults       \n"
            "dependencies   \n"
            "view           \n"
            "debug_highlight\n"
            "empty          \n"
            "dummy"
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_list_specific_columns(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "list", "--columns", "name")
        output = out.getvalue()

        assert output.strip() == (
            "name           \n"
            "===============\n"
            "cache          \n"
            "defaults       \n"
            "dependencies   \n"
            "view           \n"
            "debug_highlight\n"
            "empty          \n"
            "dummy"
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_list_simple(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "list", "--simple")
        output = out.getvalue()

        assert output.strip() == (
            "cache          \n"
            "defaults       \n"
            "dependencies   \n"
            "view           \n"
            "debug_highlight\n"
            "empty          \n"
            "dummy"
        )


@djc_test
class TestExtensionsRunCommand:
    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_run_command_root(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "run")
        output = out.getvalue()

        # Fix line breaking in CI on the first line between the `[-h]` and `{{cmd_name}}`
        output = re.compile(r"\]\s+\{").sub("] {", output)
        # Fix line breaking in CI on the first line between the `{{cmd_name}}` and `...`
        output = re.compile(r"\}\s+\.\.\.").sub("} ...", output)

        assert (
            output
            == dedent(
                f"""
                usage: components ext run [-h] {{dummy}} ...

                Run a command added by an extension.

                {OPTIONS_TITLE}:
                  -h, --help  show this help message and exit

                subcommands:
                  {{dummy}}
                    dummy     Run commands added by the 'dummy' extension.
                """
            ).lstrip()
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_run_command_ext_empty(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "run", "dummy")
        output = out.getvalue()

        assert (
            output
            == dedent(
                f"""
                usage: components ext run dummy [-h] {{dummy_cmd}} ...

                Run commands added by the 'dummy' extension.

                {OPTIONS_TITLE}:
                  -h, --help   show this help message and exit

                subcommands:
                  {{dummy_cmd}}
                    dummy_cmd  Dummy command description.
                """
            ).lstrip()
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_run_command_ext_with_commands(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "run", "dummy")
        output = out.getvalue()

        assert (
            output
            == dedent(
                f"""
                usage: components ext run dummy [-h] {{dummy_cmd}} ...

                Run commands added by the 'dummy' extension.

                {OPTIONS_TITLE}:
                  -h, --help   show this help message and exit

                subcommands:
                  {{dummy_cmd}}
                    dummy_cmd  Dummy command description.
                """
            ).lstrip()
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_run_command_ext_command(self):
        out = StringIO()
        with patch("sys.stdout", new=out):
            call_command("components", "ext", "run", "dummy", "dummy_cmd")
        output = out.getvalue()

        # NOTE: The dummy command prints out the kwargs, which is what we check for here
        assert (
            output
            == dedent(
                """
                DummyCommand.handle: args=(), kwargs={'bar': None, 'baz': None, 'foo': None, 'force_color': False, 'no_color': False, 'pythonpath': None, 'settings': None, 'skip_checks': True, 'traceback': False, 'verbosity': 1}
                """  # noqa: E501
            ).lstrip()
        )

    @djc_test(
        components_settings={"extensions": [EmptyExtension, DummyExtension]},
    )
    def test_prints_error_if_command_not_found(self):
        out = StringIO()
        with patch("sys.stderr", new=out):
            try:
                call_command("components", "ext", "run", "dummy", "dummy_cmd_not_found")
            except SystemExit:
                output = out.getvalue()

        assert "invalid choice: 'dummy_cmd_not_found'" in output