"""本模块为 NoneBot 插件开发提供便携的定义函数。

## 快捷导入

为方便使用，本模块从子模块导入了部分内容，以下内容可以直接通过本模块导入:

- `on` => {ref}``on` <nonebot.plugin.on.on>`
- `on_metaevent` => {ref}``on_metaevent` <nonebot.plugin.on.on_metaevent>`
- `on_message` => {ref}``on_message` <nonebot.plugin.on.on_message>`
- `on_notice` => {ref}``on_notice` <nonebot.plugin.on.on_notice>`
- `on_request` => {ref}``on_request` <nonebot.plugin.on.on_request>`
- `on_startswith` => {ref}``on_startswith` <nonebot.plugin.on.on_startswith>`
- `on_endswith` => {ref}``on_endswith` <nonebot.plugin.on.on_endswith>`
- `on_fullmatch` => {ref}``on_fullmatch` <nonebot.plugin.on.on_fullmatch>`
- `on_keyword` => {ref}``on_keyword` <nonebot.plugin.on.on_keyword>`
- `on_command` => {ref}``on_command` <nonebot.plugin.on.on_command>`
- `on_shell_command` => {ref}``on_shell_command` <nonebot.plugin.on.on_shell_command>`
- `on_regex` => {ref}``on_regex` <nonebot.plugin.on.on_regex>`
- `CommandGroup` => {ref}``CommandGroup` <nonebot.plugin.on.CommandGroup>`
- `Matchergroup` => {ref}``MatcherGroup` <nonebot.plugin.on.MatcherGroup>`
- `load_plugin` => {ref}``load_plugin` <nonebot.plugin.load.load_plugin>`
- `load_plugins` => {ref}``load_plugins` <nonebot.plugin.load.load_plugins>`
- `load_all_plugins` => {ref}``load_all_plugins` <nonebot.plugin.load.load_all_plugins>`
- `load_from_json` => {ref}``load_from_json` <nonebot.plugin.load.load_from_json>`
- `load_from_toml` => {ref}``load_from_toml` <nonebot.plugin.load.load_from_toml>`
- `load_builtin_plugin` => {ref}``load_builtin_plugin` <nonebot.plugin.load.load_builtin_plugin>`
- `load_builtin_plugins` => {ref}``load_builtin_plugins` <nonebot.plugin.load.load_builtin_plugins>`
- `get_plugin` => {ref}``get_plugin` <nonebot.plugin.plugin.get_plugin>`
- `get_loaded_plugins` => {ref}``get_loaded_plugins` <nonebot.plugin.plugin.get_loaded_plugins>`
- `export` => {ref}``export` <nonebot.plugin.export.export>`
- `require` => {ref}``require` <nonebot.plugin.load.require>`

FrontMatter:
    sidebar_position: 0
    description: nonebot.plugin 模块
"""

from itertools import chain
from types import ModuleType
from contextvars import ContextVar
from typing import Set, Dict, List, Optional

_plugins: Dict[str, "Plugin"] = {}
_managers: List["PluginManager"] = []
_current_plugin: ContextVar[Optional["Plugin"]] = ContextVar(
    "_current_plugin", default=None
)


def _module_name_to_plugin_name(module_name: str) -> str:
    return module_name.rsplit(".", 1)[-1]


def _new_plugin(
    module_name: str, module: ModuleType, manager: "PluginManager"
) -> "Plugin":
    plugin_name = _module_name_to_plugin_name(module_name)
    if plugin_name in _plugins:
        raise RuntimeError("Plugin already exists! Check your plugin name.")
    plugin = Plugin(plugin_name, module, module_name, manager)
    _plugins[plugin_name] = plugin
    return plugin


def _revert_plugin(plugin: "Plugin") -> None:
    if plugin.name not in _plugins:
        raise RuntimeError("Plugin not found!")
    del _plugins[plugin.name]


def get_plugin(name: str) -> Optional["Plugin"]:
    """获取已经导入的某个插件。

    如果为 `load_plugins` 文件夹导入的插件，则为文件(夹)名。

    参数:
        name: 插件名，即 {ref}`nonebot.plugin.plugin.Plugin.name`。
    """
    return _plugins.get(name)


def get_plugin_by_module_name(module_name: str) -> Optional["Plugin"]:
    """通过模块名获取已经导入的某个插件。

    如果提供的模块名为某个插件的子模块，同样会返回该插件。

    参数:
        module_name: 模块名，即 {ref}`nonebot.plugin.plugin.Plugin.module_name`。
    """
    splits = module_name.split(".")
    loaded = {plugin.module_name: plugin for plugin in _plugins.values()}
    while splits:
        name = ".".join(splits)
        if name in loaded:
            return loaded[name]
        splits.pop()


def get_loaded_plugins() -> Set["Plugin"]:
    """获取当前已导入的所有插件。"""
    return set(_plugins.values())


def get_available_plugin_names() -> Set[str]:
    """获取当前所有可用的插件名（包含尚未加载的插件）。"""
    return {*chain.from_iterable(manager.available_plugins for manager in _managers)}


from .on import on as on
from .manager import PluginManager
from .export import Export as Export
from .export import export as export
from .load import require as require
from .on import on_regex as on_regex
from .plugin import Plugin as Plugin
from .on import on_notice as on_notice
from .on import on_command as on_command
from .on import on_keyword as on_keyword
from .on import on_message as on_message
from .on import on_request as on_request
from .on import on_endswith as on_endswith
from .load import load_plugin as load_plugin
from .on import CommandGroup as CommandGroup
from .on import MatcherGroup as MatcherGroup
from .on import on_fullmatch as on_fullmatch
from .on import on_metaevent as on_metaevent
from .load import load_plugins as load_plugins
from .on import on_startswith as on_startswith
from .load import load_from_json as load_from_json
from .load import load_from_toml as load_from_toml
from .on import on_shell_command as on_shell_command
from .plugin import PluginMetadata as PluginMetadata
from .load import load_all_plugins as load_all_plugins
from .load import load_builtin_plugin as load_builtin_plugin
from .load import load_builtin_plugins as load_builtin_plugins