import inspect
import sys
from typing import Callable

from app.adapters.cache.redis import RedisHelper, AsyncRedisHelper
from app.chain.mediaserver import MediaServerChain
from app.chain.tmdb import TmdbChain

# SitesHelper涉及资源包拉取，提前引入并容错提示
try:
    from app.application.site.sites import SitesHelper  # noqa
except ImportError as e:
    SitesHelper = None
    error_message = f"错误: {str(e)}\n站点认证及索引相关资源导入失败，请尝试重建容器或手动拉取资源"
    print(error_message, file=sys.stderr)
    sys.exit(1)

from app.adapters.system.host import SystemUtils
from app.runtime.log import logger
from app.runtime.config import settings
from app.runtime.extensions.module_manager import ModuleManager
from app.runtime.events import EventManager
from app.runtime.state import SystemHelper
from app.runtime.thread import ThreadHelper
from app.adapters.network.doh import DohHelper
from app.adapters.system.resource import (
    ResourceHelper,
    configure_resource_version_provider,
)
from app.application.messaging.message import MessageHelper, stop_message
from app.adapters.external.server import MoviePilotServerHelper
from app.db import close_database
from app.db.oper.systemconfig import SystemConfigOper
from app.command import CommandChain
from app.schemas import Message, MessageType
from app.schemas.types import SystemConfigKey
from app.startup.agent_initializer import init_agent, stop_agent
from app.startup.managed_resources_initializer import (
    init_managed_resources,
    stop_managed_resources,
)
from app.application.security.access import set_superuser_token_payload_provider
from app.application.security.auth import build_superuser_token_payload
from app.application.image import configure_wallpaper_providers


def configure_wallpaper_services() -> None:
    """把需要 Chain 编排的壁纸来源注入图片服务。"""
    configure_wallpaper_providers(
        tmdb_wallpaper=lambda: TmdbChain().get_random_wallpager(),
        tmdb_wallpapers=lambda count: TmdbChain().get_trending_wallpapers(count),
        mediaserver_wallpaper=lambda: MediaServerChain().get_latest_wallpaper(),
        mediaserver_wallpapers=lambda count: MediaServerChain().get_latest_wallpapers(
            count=count
        ),
    )


def notify_event_error(title: str, message: str) -> None:
    """将事件总线错误转发到系统消息通道。"""
    MessageHelper().put(
        title=title,
        message=message,
        role="system",
    )


def start_frontend():
    """
    启动前端服务
    """
    # 仅Windows可执行文件支持内嵌nginx
    if not SystemUtils.is_frozen() \
            or not SystemUtils.is_windows():
        return
    # 临时Nginx目录
    nginx_path = settings.ROOT_PATH / 'nginx'
    if not nginx_path.exists():
        return
    # 配置目录下的Nginx目录
    run_nginx_dir = settings.CONFIG_PATH.with_name('nginx')
    if not run_nginx_dir.exists():
        # 移动到配置目录
        SystemUtils.move(nginx_path, run_nginx_dir)
    # 启动Nginx
    import subprocess
    subprocess.Popen("start nginx.exe",
                     cwd=run_nginx_dir,
                     shell=True)


def stop_frontend():
    """
    停止前端服务
    """
    if not SystemUtils.is_frozen() \
            or not SystemUtils.is_windows():
        return
    import subprocess
    subprocess.Popen(f"taskkill /f /im nginx.exe", shell=True)


def clear_temp():
    """
    清理临时文件和图片缓存
    """
    # 清理临时目录中3天前的文件
    SystemUtils.clear(settings.TEMP_PATH, days=settings.TEMP_FILE_DAYS)
    # 清理图片缓存目录中7天前的文件
    SystemUtils.clear(settings.CACHE_PATH / "images", days=settings.GLOBAL_IMAGE_CACHE_DAYS)
    # 清理 pip/uv 包下载缓存，不接管整个 .cache 目录。
    clear_package_tool_cache()


def clear_package_tool_cache():
    """
    清理 pip/uv 包下载缓存，只处理 MoviePilot 管理的工具子目录。
    """
    days = settings.PACKAGE_CACHE_DAYS
    if days <= 0:
        return
    tool_cache_root = settings.PACKAGE_CACHE_PATH
    for child in ("pip", "uv"):
        cache_path = tool_cache_root / child
        try:
            SystemUtils.clear(cache_path, days=days)
        except Exception as err:
            logger.warning("清理包下载缓存失败：%s - %s", cache_path, err)


def user_auth():
    """
    用户认证检查
    """
    sites_helper = SitesHelper()
    if sites_helper.auth_level >= 2:
        return
    auth_conf = SystemConfigOper().get(SystemConfigKey.UserSiteAuthParams)
    status, msg = sites_helper.check_user(**auth_conf) if auth_conf else sites_helper.check_user()
    if status:
        logger.info(f"{msg} 用户认证成功")
    else:
        logger.info(f"用户认证失败，{msg}")


def check_auth():
    """
    检查认证状态
    """
    if SitesHelper().auth_level < 2:
        err_msg = "用户认证失败，站点相关功能将无法使用！"
        MessageHelper().put(f"注意：{err_msg}", title="用户认证", role="system")
        CommandChain().post_message(
            Message(
                mtype=MessageType.Manual,
                title="MoviePilot用户认证",
                text=err_msg,
                link=settings.MP_DOMAIN('#/site')
            )
        )


def update_resources() -> None:
    """安装可用资源更新，并由组合根统一决定是否重启进程。"""
    sites_helper = SitesHelper()
    configure_resource_version_provider(
        lambda: (sites_helper.auth_version, sites_helper.indexer_version)
    )
    if ResourceHelper().check() is not True:
        return
    restarted, message = SystemHelper.restart()
    if not restarted:
        logger.error(f"资源更新完成但自动重启失败：{message}")


def close_browser_sessions() -> None:
    """在托管资源关闭前释放所有浏览器上下文及其工作线程。"""
    from app.adapters.network.browser import BrowserSessionHelper

    BrowserSessionHelper.close_all_sessions()


async def stop_modules():
    """
    服务关闭
    """
    async def run_step(name: str, callback: Callable[[], object]) -> None:
        """单个模块资源关闭失败时继续执行后续阶段"""
        try:
            result = callback()
            if inspect.isawaitable(result):
                await result
        except Exception as err:
            logger.error(f"关闭{name}失败：{err}")

    await run_step("AI智能体", stop_agent)
    await run_step("模块", lambda: ModuleManager().shutdown())
    await run_step("事件消费", lambda: EventManager().stop())
    await run_step("浏览器会话", close_browser_sessions)
    await run_step("托管资源", stop_managed_resources)
    await run_step("DoH服务", lambda: DohHelper().shutdown())
    await run_step("线程池", lambda: ThreadHelper().shutdown())
    await run_step("消息服务", stop_message)
    await run_step("Redis缓存连接", lambda: RedisHelper().close())
    await run_step("异步Redis缓存连接", lambda: AsyncRedisHelper().close())
    await run_step("数据库连接", close_database)
    await run_step("前端服务", stop_frontend)
    await run_step("临时文件", clear_temp)


async def init_modules():
    """
    启动模块
    """
    # 托管资源只在这里装配声明与 adapter，具体资源仍由首个消费者显式激活。
    init_managed_resources()
    # 应用服务不反向依赖 Chain，由启动组合层注入壁纸来源。
    configure_wallpaper_services()
    # 认证访问层不反向依赖数据库实现，由启动组合层注入载荷提供器。
    set_superuser_token_payload_provider(build_superuser_token_payload)
    # DoH
    DohHelper()
    # 站点管理
    SitesHelper()
    # 资源适配器只负责下载安装，是否重启由启动组合层决定。
    update_resources()
    # 用户认证
    user_auth()
    # 事件错误通知由启动组合层接入消息服务。
    EventManager().set_error_notifier(notify_event_error)
    # 加载模块
    ModuleManager()
    # 启动事件消费
    EventManager().start()
    # 初始化共享服务端状态
    MoviePilotServerHelper.init_plugin_report()
    MoviePilotServerHelper.init_subscribe_report()
    MoviePilotServerHelper.get_user_uuid()
    MoviePilotServerHelper.get_github_user()
    # 初始化AI智能体
    await init_agent()
    # 启动前端服务
    start_frontend()
    # 检查认证状态
    check_auth()