# -*- coding: utf-8 -*-
"""统一 Web 管理系统（/hub）：自动聚合所有注册过的 Web 插件。

- 插件在自己 __init__ 里调用 hexi.web_plugin_registry.register_web_plugin(...) 注册
- hub 启动时自动挂载每个插件 API 到 /api/<id>，无需手动配置
- /hub/api/plugins 由注册中心聚合返回
"""

from __future__ import annotations

from pathlib import Path
import asyncio
import json
import logging as _logging
import os
import socket
import subprocess
import sys
import threading
import time

from fastapi import Depends, FastAPI, HTTPException, status
from fastapi.responses import FileResponse, HTMLResponse, StreamingResponse
from fastapi.security import OAuth2PasswordRequestForm
from pydantic import BaseModel
from starlette.staticfiles import StaticFiles

from nonebot import get_driver, logger
from nonebot.adapters.onebot.v11 import Adapter
from nonebot.plugin import PluginMetadata

from hexi.web_auth import (
    authenticate,
    change_password,
    get_current_user,
    get_user_by_token,
    issue_token,
    oauth2_scheme,
    revoke_token,
    sync_admin,
)
from hexi.web_plugin_registry import get_web_plugin_builder, list_web_plugins

from .dashboard import collect_dashboard

__plugin_meta__ = PluginMetadata(
    name="HeXi Web Hub",
    description="统一 Web 管理系统（/hub）：自动聚合所有注册过的 Web 插件",
    usage="/hub 进入管理台",
    type="application",
)

basic_path = Path(__file__).resolve().parent
# hexi/web 是统一 Web 管理台前端(hexi/web/dist),不是插件目录下的 web
WEB_DIST = Path(__file__).resolve().parents[2] / "web" / "dist"

# 管理台自身版本号（展示在设置页「关于」处）
HUB_VERSION = "0.1.0"

# 仓库根目录（bot.py 所在）与 bot 端口
_REPO_ROOT = Path(__file__).resolve().parents[3]
_BOT_PORT = 39697


def _spawn_bot() -> None:
    """以分离进程方式拉起 bot.py：等旧实例释放端口后接管，日志追加到 _bot_run.log。"""
    try:
        log_fp = open(_REPO_ROOT / "_bot_run.log", "ab", buffering=0)
    except OSError:
        log_fp = None
    # 子进程 bootstrap：等端口空闲 -> 直接以 __main__ 运行 bot.py（该进程即 bot，不残留 wrapper）
    bootstrap = (
        "import socket,time,sys,runpy\n"
        "port=%d\n" % _BOT_PORT
        + "for _ in range(120):\n"
        "    s=socket.socket()\n"
        "    try:\n"
        "        s.bind(('0.0.0.0',port)); s.close(); break\n"
        "    except OSError:\n"
        "        s.close(); time.sleep(0.5)\n"
        "else:\n"
        "    sys.exit(2)\n"
        "runpy.run_path('bot.py', run_name='__main__')\n"
    )
    flags = 0
    if hasattr(subprocess, "CREATE_NEW_PROCESS_GROUP"):
        flags |= subprocess.CREATE_NEW_PROCESS_GROUP
    if hasattr(subprocess, "DETACHED_PROCESS"):
        flags |= subprocess.DETACHED_PROCESS
    env = {**os.environ, "PYTHONIOENCODING": "utf-8", "PYTHONUTF8": "1"}
    subprocess.Popen(
        [sys.executable, "-c", bootstrap],
        cwd=str(_REPO_ROOT),
        stdout=log_fp,
        stderr=subprocess.STDOUT,
        creationflags=flags,
        env=env,
    )


def _archive_log() -> None:
    """把当前 _bot_run.log 归档到 hexi/logs/bot_run_<时间戳>.log，并把原文件清空（供新运行）。"""
    log = _REPO_ROOT / "_bot_run.log"
    if not log.exists():
        return
    logs_dir = _REPO_ROOT / "hexi" / "logs"
    try:
        logs_dir.mkdir(parents=True, exist_ok=True)
        data = log.read_bytes()
        if data:
            ts = time.strftime("%Y%m%d_%H%M%S")
            target = logs_dir / f"bot_run_{ts}.log"
            target.write_bytes(data)
            logger.info(f"已归档旧日志 -> {target.name}")
        # 清空原日志，新 run 从空文件开始
        open(log, "wb").close()
    except OSError as e:  # noqa: BLE001
        logger.warning(f"归档日志失败: {type(e).__name__}: {e}")


def _schedule_bot_action(action: str) -> None:
    """1 秒后执行：stop 直接退出；restart 先拉起新进程再退出旧进程。"""

    def _work() -> None:
        time.sleep(1.0)
        _archive_log()
        if action == "restart":
            _spawn_bot()
            time.sleep(1.0)
        os._exit(0)

    threading.Thread(target=_work, daemon=True).start()


def _uvicorn_access_debug(record: _logging.LogRecord) -> bool:
    """把 uvicorn 访问日志级别改为 DEBUG：默认 INFO 下不显示，开启 DEBUG 才可见。"""
    if record.name == "uvicorn.access":
        record.levelno = _logging.DEBUG
        record.levelname = "DEBUG"
    return True


class PasswordModel(BaseModel):
    old_password: str
    new_password: str


class PluginControlModel(BaseModel):
    enabled: bool | None = None
    chat: list[str] | None = None


class BotConfigModel(BaseModel):
    superusers: list[str] | None = None
    nickname: list[str] | None = None
    debug: bool | None = None
    log_level: str | None = None


async def _first_bot():
    """取第一个 OneBot V11 bot，无则 None。"""
    try:
        from nonebot import get_adapter

        bots = get_adapter(Adapter).bots
        return next(iter(bots.values()), None)
    except Exception:  # noqa: BLE001
        return None


def build_hub_app() -> FastAPI:
    sync_admin()

    app = FastAPI(title="HeXi Web Hub")

    @app.post("/api/auth/token")
    async def token_endpoint(form: OAuth2PasswordRequestForm = Depends()):
        user_id = authenticate(form.username, form.password)
        if user_id is None:
            raise HTTPException(status_code=400, detail="用户名或密码错误")
        token, expires_in = issue_token(user_id)
        return {"access_token": token, "token_type": "bearer", "expires_in": expires_in}

    @app.get("/api/auth/me")
    async def me(user: dict = Depends(get_current_user)):
        return {"ok": True, "username": user["username"]}

    @app.post("/api/auth/logout")
    async def logout(token: str = Depends(oauth2_scheme)):
        if token and get_user_by_token(token):
            revoke_token(token)
        return {"ok": True}

    @app.get("/api/plugins")
    async def plugins(_: dict = Depends(get_current_user)):
        return {"plugins": list_web_plugins()}

    @app.get("/api/settings")
    async def settings(user: dict = Depends(get_current_user)):
        return {
            "ok": True,
            "user": {
                "id": user["id"],
                "username": user["username"],
                "created_at": user.get("created_at", ""),
            },
            "plugins": list_web_plugins(),
            "version": HUB_VERSION,
        }

    @app.get("/api/dashboard")
    async def dashboard(_: dict = Depends(get_current_user)):
        try:
            data = await collect_dashboard()
        except Exception as e:  # noqa: BLE001
            logger.warning(f"Dashboard 采集失败: {type(e).__name__}: {e}")
            return {"ok": False, "msg": f"采集失败: {e}"}
        return {"ok": True, **data}

    @app.get("/api/plugins/catalog")
    async def plugins_catalog(_: dict = Depends(get_current_user)):
        """全部 application 插件 + 控制面状态 + 是否带 Web 页面。"""
        from hexi.plugins.nonebot_plugin_hexi_core.plugin_control import list_plugins
        from hexi.web_config import has_schema
        from hexi.web_plugin_registry import get_web_plugin_by_module

        items = list_plugins()
        for it in items:
            web = get_web_plugin_by_module(it["id"])
            it["has_web"] = bool(web)
            it["web_path"] = "/hub/" + web["id"] if web else None
            it["has_config"] = has_schema(it["id"])
        return {"plugins": items}

    @app.get("/api/groups")
    async def groups(_: dict = Depends(get_current_user)):
        """OneBot 当前群列表（分群控制用）。"""
        bot = await _first_bot()
        if bot is None:
            return {"items": []}
        try:
            gl = await bot.get_group_list()
        except Exception as e:  # noqa: BLE001
            logger.warning(f"获取群列表失败: {type(e).__name__}: {e}")
            return {"items": []}
        return {
            "items": [
                {"group_id": int(g["group_id"]), "group_name": g.get("group_name", "")}
                for g in gl
            ]
        }

    @app.post("/api/plugins/{plugin_id}/global")
    async def plugin_global(
        plugin_id: str,
        payload: PluginControlModel,
        _: dict = Depends(get_current_user),
    ):
        from hexi.plugins.nonebot_plugin_hexi_core.plugin_control import set_global

        ctl = set_global(plugin_id, enabled=payload.enabled, chat=payload.chat)
        return {"ok": True, "control": ctl}

    @app.post("/api/plugins/{plugin_id}/groups/{group_id}")
    async def plugin_group(
        plugin_id: str,
        group_id: str,
        payload: PluginControlModel,
        _: dict = Depends(get_current_user),
    ):
        from hexi.plugins.nonebot_plugin_hexi_core.plugin_control import set_group

        ctl = set_group(
            plugin_id, group_id, enabled=payload.enabled, chat=payload.chat
        )
        return {"ok": True, "control": ctl}

    @app.delete("/api/plugins/{plugin_id}/groups/{group_id}")
    async def plugin_group_remove(
        plugin_id: str,
        group_id: str,
        _: dict = Depends(get_current_user),
    ):
        from hexi.plugins.nonebot_plugin_hexi_core.plugin_control import remove_group

        ctl = remove_group(plugin_id, group_id)
        return {"ok": True, "control": ctl}

    @app.get("/api/plugins/{plugin_id}/config")
    async def plugin_config_get(
        plugin_id: str, _: dict = Depends(get_current_user)
    ):
        from hexi.web_config import get_config

        cfg = get_config(plugin_id)
        if cfg is None:
            return {"ok": False, "msg": "该插件未注册配置 schema"}
        return {"ok": True, **cfg}

    @app.post("/api/plugins/{plugin_id}/config")
    async def plugin_config_set(
        plugin_id: str,
        payload: dict,
        _: dict = Depends(get_current_user),
    ):
        from hexi.web_config import save_config

        payload = payload or {}
        if "revision" not in payload:
            raise HTTPException(
                status_code=status.HTTP_428_PRECONDITION_REQUIRED,
                detail="缺少配置 revision，请先读取最新配置",
            )
        values = payload.get("values") or {}
        try:
            cfg = save_config(
                plugin_id, values, expected_revision=int(payload["revision"])
            )
        except RuntimeError as e:
            raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(e)) from e
        except (TypeError, ValueError) as e:
            raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(e)) from e
        return {"ok": True, **cfg}

    @app.get("/api/system/bot_config")
    async def bot_config_get(_: dict = Depends(get_current_user)):
        """读取 bot 全局配置（SUPERUSERS / NICKNAME / DEBUG / LOG_LEVEL）。"""
        from hexi.plugins.nonebot_plugin_web_hub.bot_settings import current_values

        return {"ok": True, **current_values()}

    @app.post("/api/system/bot_config")
    async def bot_config_set(
        payload: BotConfigModel,
        _: dict = Depends(get_current_user),
    ):
        """保存 bot 全局配置并尽量热应用到运行态。"""
        from hexi.plugins.nonebot_plugin_web_hub.bot_settings import save_bot_settings

        try:
            result = save_bot_settings(payload.dict(exclude_none=True))
        except ValueError as e:
            raise HTTPException(status_code=422, detail=str(e)) from e
        return result

    @app.post("/api/settings/password")
    async def settings_password(
        payload: PasswordModel,
        token: str = Depends(oauth2_scheme),
        user: dict = Depends(get_current_user),
    ):
        if len(payload.new_password) < 6:
            raise HTTPException(status_code=400, detail="新密码长度不能少于 6 位")
        if not change_password(
            user["id"], payload.old_password, payload.new_password, keep_token=token
        ):
            raise HTTPException(status_code=400, detail="原密码错误")
        return {"ok": True, "msg": "密码已修改"}

    @app.get("/api/logs")
    async def logs(
        limit: int = 500,
        _: dict = Depends(get_current_user),
    ):
        """实时读取 bot 运行日志（优先 _bot_run.log），返回最近 limit 行，供前端轮询。"""
        root = Path(__file__).resolve().parents[3]  # 仓库根目录
        candidates = [
            root / "_bot_run.log",
            root / "hexi" / "logs" / "bot.log",
        ]
        path = next((p for p in candidates if p.exists()), None)
        if path is None:
            return {"ok": False, "msg": "未找到日志文件", "lines": [], "size": 0, "total": 0}
        try:
            raw = path.read_bytes()
        except OSError as e:  # noqa: BLE001
            return {"ok": False, "msg": f"读取日志失败: {e}", "lines": [], "size": 0, "total": 0}
        # 逐行 UTF-8 优先、GBK 兜底：兼容旧 GBK 日志与切换为 UTF-8 后的新日志混存
        # 保留 ANSI 颜色码，交给前端渲染颜色
        lines = []
        for raw_line in raw.split(b"\n"):
            try:
                line = raw_line.decode("utf-8")
            except UnicodeDecodeError:
                line = raw_line.decode("gbk", errors="replace")
            lines.append(line.rstrip("\r"))
        tail = lines[-max(1, int(limit)) :]
        return {"ok": True, "file": path.name, "size": len(raw), "offset": len(raw), "lines": tail, "total": len(lines)}

    @app.get("/api/dashboard/stream")
    async def dashboard_stream(
        _: dict = Depends(get_current_user),
    ):
        """Dashboard 状态 SSE 实时推送（每 2 秒采集一次）。"""

        async def gen():
            while True:
                try:
                    data = await collect_dashboard()
                    payload = {"ok": True, **data}
                except Exception as e:  # noqa: BLE001
                    payload = {"ok": False, "msg": f"采集失败: {e}"}
                yield f"data: {json.dumps(payload, ensure_ascii=False)}\n\n"
                await asyncio.sleep(2)

        return StreamingResponse(gen(), media_type="text/event-stream")

    @app.get("/api/logs/stream")
    async def logs_stream(
        since: int = 0,
        _: dict = Depends(get_current_user),
    ):
        """SSE 实时日志流：从 since（字节偏移）增量推送新日志行。"""
        root = Path(__file__).resolve().parents[3]  # 仓库根目录
        candidates = [
            root / "_bot_run.log",
            root / "hexi" / "logs" / "bot.log",
        ]
        path = next((p for p in candidates if p.exists()), None)
        if path is None:
            raise HTTPException(status_code=404, detail="未找到日志文件")

        async def gen():
            current = max(0, since)
            beat = 0
            await asyncio.sleep(0)
            while True:
                try:
                    size = path.stat().st_size
                except OSError:
                    await asyncio.sleep(1.0)
                    continue
                if current > size:
                    current = 0  # 日志被轮转/截断
                if current < size:
                    try:
                        with open(path, "rb") as f:
                            f.seek(current)
                            raw = f.read()
                    except OSError:
                        await asyncio.sleep(1.0)
                        continue
                    last_nl = raw.rfind(b"\n")
                    if last_nl != -1:
                        # 只处理完整行，结尾半行留给下次；保留 ANSI 颜色码供前端渲染
                        data = raw[: last_nl + 1]
                        raw_lines = data.split(b"\n")
                        if raw_lines and raw_lines[-1] == b"":
                            raw_lines = raw_lines[:-1]
                        current = current + last_nl + 1
                        for raw_line in raw_lines:
                            try:
                                line = raw_line.decode("utf-8")
                            except UnicodeDecodeError:
                                line = raw_line.decode("gbk", errors="replace")
                            payload = {"line": line.rstrip("\r"), "offset": current}
                            yield f"data: {json.dumps(payload, ensure_ascii=False)}\n\n"
                await asyncio.sleep(0.5)
                beat += 1
                if beat >= 30:  # 每 ~15s 一次心跳保活
                    beat = 0
                    yield ": ping\n\n"

        return StreamingResponse(gen(), media_type="text/event-stream")

    @app.post("/api/system/bot")
    async def bot_action(
        payload: dict,
        _: dict = Depends(get_current_user),
    ):
        """停止/重启 bot 进程（stop 直接退出；restart 先拉起新进程再退出旧进程）。"""
        action = (payload or {}).get("action", "")
        if action not in {"stop", "restart"}:
            raise HTTPException(status_code=400, detail="action 必须是 stop 或 restart")
        _schedule_bot_action(action)
        label = "停止" if action == "stop" else "重启"
        return {"ok": True, "msg": f"已请求{label} bot，约 1 秒后执行"}

    assets = WEB_DIST / "assets"
    if assets.exists():
        app.mount("/assets", StaticFiles(directory=str(assets)), name="hub_assets")

    @app.get("/")
    async def index():
        if (WEB_DIST / "index.html").exists():
            return FileResponse(WEB_DIST / "index.html")
        return HTMLResponse(
            "<h1>HeXi Web Hub</h1><p>前端未构建，请在 <code>hexi/web</code> 执行 "
            "<code>npm run build</code>。</p>"
        )

    @app.get("/{path:path}")
    async def spa(path: str):
        target = (WEB_DIST / path).resolve()
        if path and target.is_file() and target.is_relative_to(WEB_DIST.resolve()):
            return FileResponse(target)
        if (WEB_DIST / "index.html").exists():
            return FileResponse(WEB_DIST / "index.html")
        raise HTTPException(status_code=404, detail="页面不存在")

    return app


def _mount_all_web_plugins() -> None:
    """启动时挂载所有已注册插件的 API 到 /api/<id>。"""
    try:
        from nonebot import get_app

        for plugin in list_web_plugins():
            builder = get_web_plugin_builder(plugin["id"])
            if not builder:
                continue
            try:
                sub_app = builder()
                if sub_app is not None:
                    get_app().mount("/api/" + plugin["id"], sub_app)
                    logger.info(f"Web 插件 API 已挂载: /api/{plugin['id']}")
            except Exception as e:  # noqa: BLE001
                logger.warning(f"Web 插件 {plugin['id']} 挂载失败: {type(e).__name__}: {e}")
    except Exception as e:  # noqa: BLE001
        logger.warning(f"Web 插件自动挂载失败: {type(e).__name__}: {e}")


def mount_hub() -> None:
    try:
        from nonebot import get_app

        get_app().mount("/hub", build_hub_app())
        logger.info("统一 Web 管理系统已挂载: /hub")
    except Exception as e:  # noqa: BLE001
        logger.warning(f"统一 Web 管理系统挂载失败: {type(e).__name__}: {e}")


mount_hub()


@get_driver().on_startup
async def _startup_mount_web_plugins() -> None:
    """等所有插件 import 完成后，注册表就绪，再统一挂载各插件 API。"""
    _mount_all_web_plugins()


@get_driver().on_startup
async def _downgrade_uvicorn_access_logs() -> None:
    """把 uvicorn.access 日志降级为 DEBUG（经 loguru 后按日志等级过滤）。"""
    _logging.getLogger("uvicorn.access").addFilter(_uvicorn_access_debug)