# Copyright (C) 2012 Anaconda, Inc
# SPDX-License-Identifier: BSD-3-Clause
"""
Definition of specific return types for use when defining a conda plugin hook.

Each type corresponds to the plugin hook for which it is used.

"""
from __future__ import annotations

from argparse import ArgumentParser, Namespace
from dataclasses import dataclass, field
from typing import Callable, NamedTuple

from requests.auth import AuthBase

from ..core.solve import Solver


@dataclass
class CondaSubcommand:
    """
    Return type to use when defining a conda subcommand plugin hook.

    For details on how this is used, see
    :meth:`~conda.plugins.hookspec.CondaSpecs.conda_subcommands`.

    :param name: Subcommand name (e.g., ``conda my-subcommand-name``).
    :param summary: Subcommand summary, will be shown in ``conda --help``.
    :param action: Callable that will be run when the subcommand is invoked.
    :param configure_parser: Callable that will be run when the subcommand parser is initialized.
    """

    name: str
    summary: str
    action: Callable[
        [Namespace | tuple[str]],  # arguments
        int | None,  # return code
    ]
    configure_parser: Callable[[ArgumentParser], None] | None = field(default=None)


class CondaVirtualPackage(NamedTuple):
    """
    Return type to use when defining a conda virtual package plugin hook.

    For details on how this is used, see
    :meth:`~conda.plugins.hookspec.CondaSpecs.conda_virtual_packages`.

    :param name: Virtual package name (e.g., ``my_custom_os``).
    :param version: Virtual package version (e.g., ``1.2.3``).
    :param build: Virtual package build string (e.g., ``x86_64``).
    """

    name: str
    version: str | None
    build: str | None


class CondaSolver(NamedTuple):
    """
    Return type to use when defining a conda solver plugin hook.

    For details on how this is used, see
    :meth:`~conda.plugins.hookspec.CondaSpecs.conda_solvers`.

    :param name: Solver name (e.g., ``custom-solver``).
    :param backend: Type that will be instantiated as the solver backend.
    """

    name: str
    backend: type[Solver]


class CondaPreCommand(NamedTuple):
    """
    Return type to use when defining a conda pre-command plugin hook.

    For details on how this is used, see
    :meth:`~conda.plugins.hookspec.CondaSpecs.conda_pre_commands`.

    :param name: Pre-command name (e.g., ``custom_plugin_pre_commands``).
    :param action: Callable which contains the code to be run.
    :param run_for: Represents the command(s) this will be run on (e.g. ``install`` or ``create``).
    """

    name: str
    action: Callable[[str], None]
    run_for: set[str]


class CondaPostCommand(NamedTuple):
    """
    Return type to use when defining a conda post-command plugin hook.

    For details on how this is used, see
    :meth:`~conda.plugins.hookspec.CondaSpecs.conda_post_commands`.

    :param name: Post-command name (e.g., ``custom_plugin_post_commands``).
    :param action: Callable which contains the code to be run.
    :param run_for: Represents the command(s) this will be run on (e.g. ``install`` or ``create``).
    """

    name: str
    action: Callable[[str], None]
    run_for: set[str]


class ChannelNameMixin:
    """
    Class mixin to make all plugin implementations compatible, e.g. when they
    use an existing (e.g. 3rd party) requests authentication handler.

    Please use the concrete :class:`~conda.plugins.types.ChannelAuthBase`
    in case you're creating an own implementation.
    """

    def __init__(self, channel_name: str, *args, **kwargs):
        self.channel_name = channel_name
        super().__init__(*args, **kwargs)


class ChannelAuthBase(ChannelNameMixin, AuthBase):
    """
    Base class that we require all plugin implementations to use to be compatible.

    Authentication is tightly coupled with individual channels. Therefore, an additional
    ``channel_name`` property must be set on the ``requests.auth.AuthBase`` based class.
    """


class CondaAuthHandler(NamedTuple):
    """
    Return type to use when the defining the conda auth handlers hook.

    :param name: Name (e.g., ``basic-auth``). This name should be unique
                 and only one may be registered at a time.
    :param handler: Type that will be used as the authentication handler
                    during network requests.
    """

    name: str
    handler: type[ChannelAuthBase]


class CondaHealthCheck(NamedTuple):
    """
    Return type to use when defining conda health checks plugin hook.
    """

    name: str
    action: Callable[[str, bool], None]
