# 插件管理模块
import asyncio
import logging
import importlib
import os
import pkgutil
import sys
import shutil
import traceback
import time
import re

import pkg.utils.updater as updater
import pkg.utils.context as context
import pkg.plugin.switch as switch
import pkg.plugin.settings as settings
import pkg.qqbot.adapter as msadapter
import pkg.utils.network as network
import pkg.plugin.metadata as metadata

from mirai import Mirai
import requests

from CallingGPT.session.session import Session

__plugins__ = {}
"""插件列表

示例:
{
    "example": {
        "path": "plugins/example/main.py",
        "enabled: True,
        "name": "example",
        "description": "example",
        "version": "0.0.1",
        "author": "RockChinQ",
        "class": <class 'plugins.example.ExamplePlugin'>,
        "hooks": {
            "person_message": [
                <function ExamplePlugin.person_message at 0x0000020E1D1B8D38>
            ]
        },
        "instance": None
    }
}
"""

__plugins_order__ = []
"""插件顺序"""

__enable_content_functions__ = True
"""是否启用内容函数"""

__callable_functions__ = []
"""供GPT调用的函数结构"""

__function_inst_map__: dict[str, callable] = {}
"""函数名:实例 映射"""


def generate_plugin_order():
    """根据__plugin__生成插件初始顺序，无视是否启用"""
    global __plugins_order__
    __plugins_order__ = []
    for plugin_name in __plugins__:
        __plugins_order__.append(plugin_name)


def iter_plugins():
    """按照顺序迭代插件"""
    for plugin_name in __plugins_order__:
        yield __plugins__[plugin_name]


def iter_plugins_name():
    """迭代插件名"""
    for plugin_name in __plugins_order__:
        yield plugin_name


__current_module_path__ = ""


def walk_plugin_path(module, prefix='', path_prefix=''):
    global __current_module_path__
    """遍历插件路径"""
    for item in pkgutil.iter_modules(module.__path__):
        if item.ispkg:
            logging.debug("扫描插件包: plugins/{}".format(path_prefix + item.name))
            walk_plugin_path(__import__(module.__name__ + '.' + item.name, fromlist=['']),
                             prefix + item.name + '.', path_prefix + item.name + '/')
        else:
            try:
                logging.debug("扫描插件模块: plugins/{}".format(path_prefix + item.name + '.py'))
                __current_module_path__ = "plugins/"+path_prefix + item.name + '.py'

                importlib.import_module(module.__name__ + '.' + item.name)
                logging.debug('加载模块: plugins/{} 成功'.format(path_prefix + item.name + '.py'))
            except:
                logging.error('加载模块: plugins/{} 失败: {}'.format(path_prefix + item.name + '.py', sys.exc_info()))
                traceback.print_exc()


def load_plugins():
    """加载插件"""
    logging.debug("加载插件")
    PluginHost()
    walk_plugin_path(__import__('plugins'))

    logging.debug(__plugins__)

    # 加载开关数据
    switch.load_switch()

    # 生成初始顺序
    generate_plugin_order()
    # 加载插件顺序
    settings.load_settings()

    logging.debug("registered plugins: {}".format(__plugins__))

    # 输出已注册的内容函数列表
    logging.debug("registered content functions: {}".format(__callable_functions__))
    logging.debug("function instance map: {}".format(__function_inst_map__))

    # 迁移插件源地址记录
    metadata.do_plugin_git_repo_migrate()


def initialize_plugins():
    """初始化插件"""
    logging.info("初始化插件")
    import pkg.plugin.models as models

    successfully_initialized_plugins = []

    for plugin in iter_plugins():
        # if not plugin['enabled']:
        #     continue
        try:
            models.__current_registering_plugin__ = plugin['name']
            plugin['instance'] = plugin["class"](plugin_host=context.get_plugin_host())
            # logging.info("插件 {} 已初始化".format(plugin['name']))
            successfully_initialized_plugins.append(plugin['name'])
        except:
            logging.error("插件{}初始化时发生错误: {}".format(plugin['name'], sys.exc_info()))
    
    logging.info("以下插件已初始化: {}".format(", ".join(successfully_initialized_plugins)))


def unload_plugins():
    """卸载插件"""
    # 不再显式卸载插件，因为当程序结束时，插件的析构函数会被系统执行
    # for plugin in __plugins__.values():
    #     if plugin['enabled'] and plugin['instance'] is not None:
    #         if not hasattr(plugin['instance'], '__del__'):
    #             logging.warning("插件{}没有定义析构函数".format(plugin['name']))
    #         else:
    #             try:
    #                 plugin['instance'].__del__()
    #                 logging.info("卸载插件: {}".format(plugin['name']))
    #                 plugin['instance'] = None
    #             except:
    #                 logging.error("插件{}卸载时发生错误: {}".format(plugin['name'], sys.exc_info()))


def get_github_plugin_repo_label(repo_url: str) -> list[str]:
    """获取username, repo"""

    # 提取 username/repo , 正则表达式
    repo =  re.findall(r'(?:https?://github\.com/|git@github\.com:)([^/]+/[^/]+?)(?:\.git|/|$)', repo_url)

    if len(repo) > 0: # github
        return repo[0].split("/")
    else:
        return None


def download_plugin_source_code(repo_url: str, target_path: str) -> str:
    """下载插件源码"""
    # 检查源类型
    
    # 提取 username/repo , 正则表达式
    repo =  get_github_plugin_repo_label(repo_url)

    target_path += repo[1]

    if repo is not None: # github
        logging.info("从 GitHub 下载插件源码...")

        zipball_url = f"https://api.github.com/repos/{'/'.join(repo)}/zipball/HEAD"

        zip_resp = requests.get(
            url=zipball_url,
            proxies=network.wrapper_proxies(),
            stream=True
        )

        if zip_resp.status_code != 200:
            raise Exception("下载源码失败: {}".format(zip_resp.text))
        
        if os.path.exists("temp/"+target_path):
            shutil.rmtree("temp/"+target_path)

        if os.path.exists(target_path):
            shutil.rmtree(target_path)

        os.makedirs("temp/"+target_path)

        with open("temp/"+target_path+"/source.zip", "wb") as f:
            for chunk in zip_resp.iter_content(chunk_size=1024):
                if chunk:
                    f.write(chunk)

        logging.info("下载完成, 解压...")
        import zipfile
        with zipfile.ZipFile("temp/"+target_path+"/source.zip", 'r') as zip_ref:
            zip_ref.extractall("temp/"+target_path)
        os.remove("temp/"+target_path+"/source.zip")

        # 目标是 username-repo-hash , 用正则表达式提取完整的文件夹名，复制到 plugins/repo
        import glob

        # 获取解压后的文件夹名
        unzip_dir = glob.glob("temp/"+target_path+"/*")[0]

        # 复制到 plugins/repo
        shutil.copytree(unzip_dir, target_path+"/")

        # 删除解压后的文件夹
        shutil.rmtree(unzip_dir)

        logging.info("解压完成")
    else:
        raise Exception("暂不支持的源类型，请使用 GitHub 仓库发行插件。")
    
    return repo[1]


def check_requirements(path: str):
    # 检查此目录是否包含requirements.txt
    if os.path.exists(path+"/requirements.txt"):
        logging.info("检测到requirements.txt，正在安装依赖")
        import pkg.utils.pkgmgr
        pkg.utils.pkgmgr.install_requirements(path+"/requirements.txt")

        import pkg.utils.log as log
        log.reset_logging()


def install_plugin(repo_url: str):
    """安装插件，从git储存库获取并解决依赖"""

    repo_label = download_plugin_source_code(repo_url, "plugins/")

    check_requirements("plugins/"+repo_label)

    metadata.set_plugin_metadata(repo_label, repo_url, int(time.time()), "HEAD")


def uninstall_plugin(plugin_name: str) -> str:
    """卸载插件"""
    if plugin_name not in __plugins__:
        raise Exception("插件不存在")
    
    # 获取文件夹路径
    plugin_path = __plugins__[plugin_name]['path'].replace("\\", "/")

    # 剪切路径为plugins/插件名
    plugin_path = plugin_path.split("plugins/")[1].split("/")[0]

    # 删除文件夹
    shutil.rmtree("plugins/"+plugin_path)
    return "plugins/"+plugin_path


def update_plugin(plugin_name: str):
    """更新插件"""
    # 检查是否有远程地址记录
    plugin_path_name = get_plugin_path_name_by_plugin_name(plugin_name)

    meta = metadata.get_plugin_metadata(plugin_path_name)

    if meta == {}:
        raise Exception("没有此插件元数据信息，无法更新")

    remote_url = meta['source']
    if remote_url == "https://github.com/RockChinQ/QChatGPT" or remote_url == "https://gitee.com/RockChin/QChatGPT" \
        or remote_url == "" or remote_url is None or remote_url == "http://github.com/RockChinQ/QChatGPT" or remote_url == "http://gitee.com/RockChin/QChatGPT":
        raise Exception("插件没有远程地址记录，无法更新")
    
    # 重新安装插件
    logging.info("正在重新安装插件以进行更新...")

    install_plugin(remote_url)


def get_plugin_name_by_path_name(plugin_path_name: str) -> str:
    for k, v in __plugins__.items():
        if v['path'] == "plugins/"+plugin_path_name+"/main.py":
            return k
    return None


def get_plugin_path_name_by_plugin_name(plugin_name: str) -> str:
    if plugin_name not in __plugins__:
        return None
    
    plugin_main_module_path = __plugins__[plugin_name]['path']

    plugin_main_module_path = plugin_main_module_path.replace("\\", "/")

    spt = plugin_main_module_path.split("/")

    return spt[1]


class EventContext:
    """事件上下文"""
    eid = 0
    """事件编号"""

    name = ""

    __prevent_default__ = False
    """是否阻止默认行为"""

    __prevent_postorder__ = False
    """是否阻止后续插件的执行"""

    __return_value__ = {}
    """ 返回值 
    示例:
    {
        "example": [
            'value1',
            'value2',
            3,
            4,
            {
                'key1': 'value1',
            },
            ['value1', 'value2']
        ]
    }
    """

    def add_return(self, key: str, ret):
        """添加返回值"""
        if key not in self.__return_value__:
            self.__return_value__[key] = []
        self.__return_value__[key].append(ret)

    def get_return(self, key: str) -> list:
        """获取key的所有返回值"""
        if key in self.__return_value__:
            return self.__return_value__[key]
        return None

    def get_return_value(self, key: str):
        """获取key的首个返回值"""
        if key in self.__return_value__:
            return self.__return_value__[key][0]
        return None

    def prevent_default(self):
        """阻止默认行为"""
        self.__prevent_default__ = True

    def prevent_postorder(self):
        """阻止后续插件执行"""
        self.__prevent_postorder__ = True

    def is_prevented_default(self):
        """是否阻止默认行为"""
        return self.__prevent_default__

    def is_prevented_postorder(self):
        """是否阻止后序插件执行"""
        return self.__prevent_postorder__

    def __init__(self, name: str):
        self.name = name
        self.eid = EventContext.eid
        self.__prevent_default__ = False
        self.__prevent_postorder__ = False
        self.__return_value__ = {}
        EventContext.eid += 1


def emit(event_name: str, **kwargs) -> EventContext:
    """触发事件"""
    import pkg.utils.context as context
    if context.get_plugin_host() is None:
        return None
    return context.get_plugin_host().emit(event_name, **kwargs)


class PluginHost:
    """插件宿主"""

    def __init__(self):
        """初始化插件宿主"""
        context.set_plugin_host(self)
        self.calling_gpt_session = Session([])

    def get_runtime_context(self) -> context:
        """获取运行时上下文（pkg.utils.context模块的对象）

        此上下文用于和主程序其他模块交互（数据库、QQ机器人、OpenAI接口等）
        详见pkg.utils.context模块
        其中的context变量保存了其他重要模块的类对象，可以使用这些对象进行交互
        """
        return context

    def get_bot(self) -> Mirai:
        """获取机器人对象"""
        return context.get_qqbot_manager().bot

    def get_bot_adapter(self) -> msadapter.MessageSourceAdapter:
        """获取消息源适配器"""
        return context.get_qqbot_manager().adapter

    def send_person_message(self, person, message):
        """发送私聊消息"""
        self.get_bot_adapter().send_message("person", person, message)

    def send_group_message(self, group, message):
        """发送群消息"""
        self.get_bot_adapter().send_message("group", group, message)

    def notify_admin(self, message):
        """通知管理员"""
        context.get_qqbot_manager().notify_admin(message)

    def emit(self, event_name: str, **kwargs) -> EventContext:
        """触发事件"""
        import json

        event_context = EventContext(event_name)
        logging.debug("触发事件: {} ({})".format(event_name, event_context.eid))
        for plugin in iter_plugins():
            
            if not plugin['enabled']:
                continue

            # if plugin['instance'] is None:
            #     # 从关闭状态切到开启状态之后，重新加载插件
            #     try:
            #         plugin['instance'] = plugin["class"](plugin_host=self)
            #         logging.info("插件 {} 已初始化".format(plugin['name']))
            #     except:
            #         logging.error("插件 {} 初始化时发生错误: {}".format(plugin['name'], sys.exc_info()))
            #         continue

            if 'hooks' not in plugin or event_name not in plugin['hooks']:
                continue

            hooks = []
            if event_name in plugin["hooks"]:
                hooks = plugin["hooks"][event_name]
            for hook in hooks:
                try:
                    already_prevented_default = event_context.is_prevented_default()

                    kwargs['host'] = context.get_plugin_host()
                    kwargs['event'] = event_context

                    hook(plugin['instance'], **kwargs)

                    if event_context.is_prevented_default() and not already_prevented_default:
                        logging.debug("插件 {} 已要求阻止事件 {} 的默认行为".format(plugin['name'], event_name))

                except Exception as e:
                    logging.error("插件{}响应事件{}时发生错误".format(plugin['name'], event_name))
                    logging.error(traceback.format_exc())

            # print("done:{}".format(plugin['name']))
            if event_context.is_prevented_postorder():
                logging.debug("插件 {} 阻止了后序插件的执行".format(plugin['name']))
                break

        logging.debug("事件 {} ({}) 处理完毕，返回值: {}".format(event_name, event_context.eid,
                                                                event_context.__return_value__))

        return event_context

if __name__ == "__main__":
    pass