from ..Convention.Runtime.GlobalConfig import ProjectConfig
from ..Convention.Runtime.Architecture import Architecture
from ..CoreModules.database import get_db
from fastapi import APIRouter, FastAPI
from typing import *
from pydantic import *
from abc import ABC
import importlib
import os

config = ProjectConfig()

class DatabaseModel(BaseModel):
    table_name: str = Field(default="main_table")
    column_names: List[str] = Field(default=[])
    column_defs: Dict[str, str] = Field(default={})

class PluginInterface(ABC):
    plugin_instances: Dict[str, "PluginInterface"] = {}

    def callback(self, message: str, chat_id: int, user_id: int) -> str:
        '''
        继承后重写该方法接受消息并返回消息
        返回空字符串代表不进行反馈
        Args:
            message: 消息内容
            chat_id: 会话ID
            user_id: 用户ID
        Returns:
            str: 消息内容
        '''
        return ""

    def execute(self, path:str) -> Optional[APIRouter]:
        '''
        继承后是否返回路由决定是否启动该插件
        若返回None, 则不启动该插件
        '''
        Architecture.Register(self.__class__, self, self.wake_up, *self.dependencies())
        router = APIRouter()
        router.get(path)(self.generate_router_callback())
        # 在数据库保证必要的表和列存在
        db = get_db()
        db_model = self.register_db_model()
        if db_model:
            db.define_table(db_model.table_name)
            for field in db_model.column_names:
                db.define_column(db_model.table_name, field, db_model.column_defs[field])

        return router

    def generate_router_callback(self) -> Callable|Coroutine:
        '''
        继承后重写该方法生成路由回调函数
        '''
        async def callback(*args: Any, **kwargs: Any) -> Any:
            pass
        return callback

    def dependencies(self) -> List[Type]:
        '''
        继承后重写该方法注册依赖插件
        若返回[], 则不需要依赖插件
        '''
        return []

    def wake_up(self) -> None:
        '''
        依赖插件全部注册后被调用, 用于通知插件实例依赖项已完全注册
        '''
        pass

    def register_plugin(self, command: str) -> None:
        '''
        将插件注册, 使其可以被命令匹配
        '''
        PluginInterface.plugin_instances[command] = self

    def register_db_model(self) -> DatabaseModel:
        '''
        继承后重写该方法注册数据库模型
        '''
        return DatabaseModel()

def ImportPlugins(app: FastAPI, plugin_dir:str = "Plugins") -> None:
    '''
    导入插件
    
    Args:
        app: FastAPI应用
        plugin_dir: 插件目录
    '''
    for file in os.listdir(plugin_dir):
        if file.endswith(".py") and not file.startswith("__"):
            module_name = file[:-3]
            try:
                module = importlib.import_module(module_name)
                for class_name in dir(module):
                    plugin_class = getattr(module, class_name)
                    if issubclass(plugin_class, PluginInterface):
                        plugin = plugin_class()
                        router = plugin.execute(f"/{module_name}")
                        if router:
                            app.include_router(router, prefix=f"/api", tags=[module_name])
            except Exception as e:
                config.Log("Error", f"加载插件{module_name}失败: {e}")

__all__ = ["ImportPlugins", "PluginInterface", "DatabaseModel"]