"""
快捷导入
========

为方便使用，`nonebot` 模块从子模块导入了部分内容

- `on_message` => `nonebot.plugin.on_message`
- `on_notice` => `nonebot.plugin.on_notice`
- `on_request` => `nonebot.plugin.on_request`
- `on_metaevent` => `nonebot.plugin.on_metaevent`
- `on_startswith` => `nonebot.plugin.on_startswith`
- `on_endswith` => `nonebot.plugin.on_endswith`
- `on_keyword` => `nonebot.plugin.on_keyword`
- `on_command` => `nonebot.plugin.on_command`
- `on_shell_command` => `nonebot.plugin.on_shell_command`
- `on_regex` => `nonebot.plugin.on_regex`
- `CommandGroup` => `nonebot.plugin.CommandGroup`
- `Matchergroup` => `nonebot.plugin.MatcherGroup`
- `load_plugin` => `nonebot.plugin.load_plugin`
- `load_plugins` => `nonebot.plugin.load_plugins`
- `load_all_plugins` => `nonebot.plugin.load_all_plugins`
- `load_from_json` => `nonebot.plugin.load_from_json`
- `load_from_toml` => `nonebot.plugin.load_from_toml`
- `load_builtin_plugin` => `nonebot.plugin.load_builtin_plugin`
- `load_builtin_plugins` => `nonebot.plugin.load_builtin_plugins`
- `get_plugin` => `nonebot.plugin.get_plugin`
- `get_loaded_plugins` => `nonebot.plugin.get_loaded_plugins`
- `export` => `nonebot.plugin.export`
- `require` => `nonebot.plugin.require`
"""

import importlib
from typing import Any, Dict, Type, Optional

import pkg_resources

from nonebot.adapters import Bot
from nonebot.utils import escape_tag
from nonebot.config import Env, Config
from nonebot.log import logger, default_filter
from nonebot.drivers import Driver, ReverseDriver, combine_driver

try:
    _dist: pkg_resources.Distribution = pkg_resources.get_distribution("nonebot2")
    __version__ = _dist.version
    VERSION = _dist.parsed_version
except pkg_resources.DistributionNotFound:  # pragma: no cover
    __version__ = None
    VERSION = None

_driver: Optional[Driver] = None


def get_driver() -> Driver:
    """
    获取全局 Driver 对象。可用于在计划任务的回调中获取当前 Driver 对象。

    :返回:

      Driver: 全局 Driver 对象

    :异常:

      ValueError: 全局 Driver 对象尚未初始化 (nonebot.init 尚未调用)

    :用法:

    .. code-block:: python

        driver = nonebot.get_driver()

    """
    if _driver is None:
        raise ValueError("NoneBot has not been initialized.")
    return _driver


def get_app() -> Any:
    """
    获取全局 Driver 对应 Server App 对象。

    :返回:

      Any: Server App 对象

    :异常:

      ValueError: 全局 Driver 对象尚未初始化 (nonebot.init 尚未调用)

    :用法:

    .. code-block:: python

        app = nonebot.get_app()

    """
    driver = get_driver()
    assert isinstance(
        driver, ReverseDriver
    ), "app object is only available for reverse driver"
    return driver.server_app


def get_asgi() -> Any:
    """
    获取全局 Driver 对应 Asgi 对象。

    :返回:

      Any: Asgi 对象

    :异常:

      ValueError: 全局 Driver 对象尚未初始化 (nonebot.init 尚未调用)

    :用法:

    .. code-block:: python

        asgi = nonebot.get_asgi()

    """
    driver = get_driver()
    assert isinstance(
        driver, ReverseDriver
    ), "asgi object is only available for reverse driver"
    return driver.asgi


def get_bot(self_id: Optional[str] = None) -> Bot:
    """
    当提供 self_id 时，此函数是 get_bots()[self_id] 的简写；当不提供时，返回一个 Bot。

    参数:
      self_id: 用来识别 Bot 的 ID

    :返回:

      Bot: Bot 对象

    :异常:

      KeyError: 对应 ID 的 Bot 不存在
      ValueError: 全局 Driver 对象尚未初始化 (nonebot.init 尚未调用)
      ValueError: 没有传入 ID 且没有 Bot 可用

    :用法:

    .. code-block:: python

        assert nonebot.get_bot('12345') == nonebot.get_bots()['12345']

        another_unspecified_bot = nonebot.get_bot()
    """
    bots = get_bots()
    if self_id is not None:
        return bots[self_id]

    for bot in bots.values():
        return bot

    raise ValueError("There are no bots to get.")


def get_bots() -> Dict[str, Bot]:
    """
    获取所有通过 ws 连接 NoneBot 的 Bot 对象。

    :返回:

      Dict[str, Bot]: 一个以字符串 ID 为键，Bot 对象为值的字典

    :异常:

      ValueError: 全局 Driver 对象尚未初始化 (nonebot.init 尚未调用)

    :用法:

    .. code-block:: python

        bots = nonebot.get_bots()

    """
    driver = get_driver()
    return driver.bots


def _resolve_dot_notation(
    obj_str: str, default_attr: str, default_prefix: Optional[str] = None
) -> Any:
    modulename, _, cls = obj_str.partition(":")
    if default_prefix is not None and modulename.startswith("~"):
        modulename = default_prefix + modulename[1:]
    module = importlib.import_module(modulename)
    if not cls:
        return getattr(module, default_attr)
    instance = module
    for attr_str in cls.split("."):
        instance = getattr(instance, attr_str)
    return instance


def _resolve_combine_expr(obj_str: str) -> Type[Driver]:
    drivers = obj_str.split("+")
    DriverClass = _resolve_dot_notation(
        drivers[0], "Driver", default_prefix="nonebot.drivers."
    )
    if len(drivers) == 1:
        logger.trace(f"Detected driver {DriverClass} with no mixins.")
        return DriverClass
    mixins = [
        _resolve_dot_notation(mixin, "Mixin", default_prefix="nonebot.drivers.")
        for mixin in drivers[1:]
    ]
    logger.trace(f"Detected driver {DriverClass} with mixins {mixins}.")
    return combine_driver(DriverClass, *mixins)


def init(*, _env_file: Optional[str] = None, **kwargs):
    """
    初始化 NoneBot 以及 全局 Driver 对象。

    NoneBot 将会从 .env 文件中读取环境信息，并使用相应的 env 文件配置。

    你也可以传入自定义的 _env_file 来指定 NoneBot 从该文件读取配置。

    参数:
      _env_file: 配置文件名，默认从 .env.{env_name} 中读取配置
      **kwargs: 任意变量，将会存储到 Config 对象里

    :返回:

      - `None`

    :用法:

    .. code-block:: python

        nonebot.init(database=Database(...))

    """
    global _driver
    if not _driver:
        logger.success("NoneBot is initializing...")
        env = Env()
        config = Config(
            **kwargs,
            _common_config=env.dict(),
            _env_file=_env_file or f".env.{env.environment}",
        )

        default_filter.level = config.log_level
        logger.opt(colors=True).info(
            f"Current <y><b>Env: {escape_tag(env.environment)}</b></y>"
        )
        logger.opt(colors=True).debug(
            f"Loaded <y><b>Config</b></y>: {escape_tag(str(config.dict()))}"
        )

        DriverClass: Type[Driver] = _resolve_combine_expr(config.driver)
        _driver = DriverClass(env, config)


def run(*args: Any, **kwargs: Any) -> None:
    """
    启动 NoneBot，即运行全局 Driver 对象。

    参数:
      *args: 传入 Driver.run 的位置参数
      **kwargs: 传入 Driver.run 的命名参数

    :返回:

      - `None`

    :用法:

    .. code-block:: python

        nonebot.run(host="127.0.0.1", port=8080)

    """
    logger.success("Running NoneBot...")
    get_driver().run(*args, **kwargs)


import nonebot.params as params
from nonebot.plugin import export as export
from nonebot.plugin import require as require
from nonebot.plugin import on_regex as on_regex
from nonebot.plugin import on_notice as on_notice
from nonebot.plugin import get_plugin as get_plugin
from nonebot.plugin import on_command as on_command
from nonebot.plugin import on_keyword as on_keyword
from nonebot.plugin import on_message as on_message
from nonebot.plugin import on_request as on_request
from nonebot.plugin import load_plugin as load_plugin
from nonebot.plugin import on_endswith as on_endswith
from nonebot.plugin import CommandGroup as CommandGroup
from nonebot.plugin import MatcherGroup as MatcherGroup
from nonebot.plugin import load_plugins as load_plugins
from nonebot.plugin import on_metaevent as on_metaevent
from nonebot.plugin import on_startswith as on_startswith
from nonebot.plugin import load_from_json as load_from_json
from nonebot.plugin import load_from_toml as load_from_toml
from nonebot.plugin import load_all_plugins as load_all_plugins
from nonebot.plugin import on_shell_command as on_shell_command
from nonebot.plugin import get_loaded_plugins as get_loaded_plugins
from nonebot.plugin import load_builtin_plugin as load_builtin_plugin
from nonebot.plugin import load_builtin_plugins as load_builtin_plugins