"""LLM provider registry, auth flows, and model metadata helpers."""

from __future__ import annotations

import asyncio
import base64
import copy
import hashlib
import json
import secrets
import threading
import time
from dataclasses import dataclass, field
from pathlib import Path
from typing import Any, Dict, Optional, Tuple
from urllib.parse import urlencode

import aiofiles
import httpx
import jwt

from app.core.config import settings
from app.db.systemconfig_oper import SystemConfigOper
from app.log import logger
from app.schemas.types import SystemConfigKey
from app.utils.singleton import Singleton


class LLMProviderError(RuntimeError):
    """通用 LLM provider 异常。"""


class LLMProviderAuthError(LLMProviderError):
    """LLM provider 鉴权异常。"""


@dataclass(frozen=True)
class ProviderAuthMethod:
    """前端展示用的授权方式定义。"""

    id: str
    type: str
    label: str
    description: str = ""


@dataclass(frozen=True)
class ProviderSpec:
    """描述一个可接入的 LLM provider。"""

    id: str
    name: str
    runtime: str
    models_dev_provider_id: Optional[str] = None
    default_base_url: Optional[str] = None
    base_url_editable: bool = False
    requires_base_url: bool = False
    supports_api_key: bool = True
    api_key_label: str = "API Key"
    api_key_hint: str = ""
    oauth_methods: Tuple[ProviderAuthMethod, ...] = ()
    supports_model_refresh: bool = True
    model_list_strategy: str = "openai_compatible"
    sort_order: int = 100
    description: str = ""


@dataclass
class PendingAuthSession:
    """保存临时鉴权会话，避免把 PKCE/device code 等状态写回配置。"""

    session_id: str
    provider_id: str
    method_id: str
    flow_type: str
    status: str = "pending"
    message: str = ""
    authorize_url: Optional[str] = None
    instructions: Optional[str] = None
    verification_url: Optional[str] = None
    user_code: Optional[str] = None
    interval_seconds: int = 5
    expires_at: float = 0
    created_at: float = field(default_factory=time.time)
    context: Dict[str, Any] = field(default_factory=dict)


class LLMProviderManager(metaclass=Singleton):
    """统一维护 provider 目录、models.dev 缓存和 OAuth 状态。"""

    _MODELS_DEV_URL = "https://models.dev/api.json"
    _MODELS_DEV_CACHE_TTL = 12 * 60 * 60
    _CHATGPT_CLIENT_ID = "app_EMoamEEZ73f0CkXaXp7hrann"
    _CHATGPT_ISSUER = "https://auth.openai.com"
    _CHATGPT_CODEX_BASE_URL = "https://chatgpt.com/backend-api/codex"
    _COPILOT_CLIENT_ID = "Ov23li8tweQw6odWQebz"
    _DEFAULT_TIMEOUT = httpx.Timeout(15.0, connect=10.0)
    _CHATGPT_ALLOWED_OAUTH_MODELS = {
        "gpt-5.1-codex",
        "gpt-5.1-codex-max",
        "gpt-5.1-codex-mini",
        "gpt-5.2",
        "gpt-5.2-codex",
        "gpt-5.3-codex",
        "gpt-5.4",
        "gpt-5.4-mini",
        "gpt-5.5",
    }

    def __init__(self):
        self._lock = threading.RLock()
        self._models_dev_lock = asyncio.Lock()
        self._pending_sessions: dict[str, PendingAuthSession] = {}
        self._oauth_state_index: dict[str, str] = {}
        self._models_dev_data: dict[str, Any] | None = None
        self._models_dev_loaded_at: float = 0
        self._models_dev_cache_path = (
                Path(settings.TEMP_PATH) / "llm_provider_models_dev_cache.json"
        )

    @staticmethod
    def _provider_specs() -> tuple[ProviderSpec, ...]:
        """
        返回受支持的 provider 定义。

        OpenAI 保留为用户自定义 OpenAI-compatible 兜底入口，因此仍要求填写
        Base URL；ChatGPT 则单独承接官方 API Key / ChatGPT 订阅鉴权。
        """
        browser_auth = ProviderAuthMethod(
            id="browser_oauth",
            type="oauth",
            label="浏览器授权",
            description="使用 ChatGPT Plus/Pro 浏览器登录并回调授权。",
        )
        device_auth = ProviderAuthMethod(
            id="device_code",
            type="device",
            label="设备码授权",
            description="适合无回调环境，复制设备码到浏览器完成登录。",
        )
        return (
            ProviderSpec(
                id="chatgpt",
                name="ChatGPT",
                runtime="chatgpt",
                models_dev_provider_id="openai",
                default_base_url="https://api.openai.com/v1",
                api_key_hint="可直接填写 OpenAI API Key，或使用 ChatGPT Plus/Pro 登录授权。",
                oauth_methods=(browser_auth, device_auth),
                model_list_strategy="chatgpt",
                description="支持 ChatGPT Plus/Pro 鉴权或 OpenAI 官方 API Key。",
                sort_order=10,
            ),
            ProviderSpec(
                id="google",
                name="Google",
                runtime="google",
                models_dev_provider_id="google",
                supports_api_key=True,
                api_key_hint="填写 Gemini / Google AI Studio API Key。",
                model_list_strategy="google",
                description="Gemini / Google AI Studio。",
                sort_order=20,
            ),
            ProviderSpec(
                id="deepseek",
                name="DeepSeek",
                runtime="deepseek",
                models_dev_provider_id="deepseek",
                default_base_url="https://api.deepseek.com",
                api_key_hint="填写 DeepSeek API Key。",
                description="DeepSeek 官方平台。",
                sort_order=30,
            ),
            ProviderSpec(
                id="openrouter",
                name="OpenRouter",
                runtime="openai_compatible",
                models_dev_provider_id="openrouter",
                default_base_url="https://openrouter.ai/api/v1",
                api_key_hint="填写 OpenRouter API Key。",
                description="OpenRouter 聚合模型平台。",
                sort_order=40,
            ),
            ProviderSpec(
                id="github-copilot",
                name="GitHub Copilot",
                runtime="github_copilot",
                models_dev_provider_id="github-copilot",
                supports_api_key=False,
                api_key_label="GitHub Token",
                oauth_methods=(
                    ProviderAuthMethod(
                        id="device_code",
                        type="device",
                        label="GitHub 设备码授权",
                        description="使用 GitHub Copilot 订阅登录授权。",
                    ),
                ),
                model_list_strategy="github_copilot",
                description="通过 GitHub Copilot 订阅接入。",
                sort_order=50,
            ),
            ProviderSpec(
                id="siliconflow",
                name="硅基流动",
                runtime="openai_compatible",
                models_dev_provider_id="siliconflow",
                default_base_url="https://api.siliconflow.cn/v1",
                api_key_hint="填写硅基流动 API Key。",
                description="SiliconFlow 官方兼容端点。",
                sort_order=60,
            ),
            ProviderSpec(
                id="alibaba",
                name="阿里云百炼",
                runtime="openai_compatible",
                models_dev_provider_id="alibaba",
                default_base_url="https://dashscope.aliyuncs.com/compatible-mode/v1",
                api_key_hint="填写 DashScope / Alibaba API Key。",
                description="阿里云百炼兼容端点。",
                sort_order=70,
            ),
            ProviderSpec(
                id="volcengine",
                name="火山方舟",
                runtime="openai_compatible",
                default_base_url="https://ark.cn-beijing.volces.com/api/v3",
                api_key_hint="填写火山方舟 API Key。",
                description="字节跳动火山引擎兼容端点。",
                sort_order=80,
            ),
            ProviderSpec(
                id="tencent",
                name="腾讯云",
                runtime="openai_compatible",
                models_dev_provider_id="tencent-tokenhub",
                default_base_url="https://tokenhub.tencentmaas.com/v1",
                api_key_hint="填写 Tencent API Key。",
                model_list_strategy="models_dev_only",
                description="腾讯兼容端点。",
                sort_order=90,
            ),
            ProviderSpec(
                id="ollama-cloud",
                name="Ollama Cloud",
                runtime="openai_compatible",
                models_dev_provider_id="ollama-cloud",
                default_base_url="https://ollama.com/v1",
                api_key_hint="填写 Ollama Cloud API Key。",
                description="Ollama Cloud 云端模型服务。",
                sort_order=100,
            ),
            ProviderSpec(
                id="nvidia",
                name="Nvidia",
                runtime="openai_compatible",
                models_dev_provider_id="nvidia",
                default_base_url="https://integrate.api.nvidia.com/v1",
                api_key_hint="填写 Nvidia API Key。",
                description="Nvidia 集成推理平台。",
                sort_order=110,
            ),
            ProviderSpec(
                id="minimax",
                name="MiniMax",
                runtime="anthropic_compatible",
                models_dev_provider_id="minimax",
                default_base_url="https://api.minimaxi.com/anthropic/v1",
                api_key_hint="填写 MiniMax API Key。",
                model_list_strategy="anthropic_compatible",
                description="MiniMax Anthropic-compatible 端点。",
                sort_order=120,
            ),
            ProviderSpec(
                id="xiaomi",
                name="Xiaomi",
                runtime="openai_compatible",
                models_dev_provider_id="xiaomi",
                default_base_url="https://api.xiaomimimo.com/v1",
                api_key_hint="填写 Xiaomi API Key。",
                description="小米 Mimo 兼容端点。",
                sort_order=130,
            ),
            ProviderSpec(
                id="openai",
                name="OpenAI Compatible",
                runtime="openai_compatible",
                default_base_url="",
                base_url_editable=True,
                requires_base_url=True,
                supports_api_key=True,
                api_key_hint="通用 OpenAI-compatible 兜底入口，需要手动填写 Base URL。",
                description="通用 OpenAI-compatible 模型服务。",
                sort_order=200,
            ),
        )

    def list_providers(self) -> list[dict[str, Any]]:
        """返回前端可渲染的 provider 目录。"""
        providers = []
        for spec in sorted(self._provider_specs(), key=lambda item: item.sort_order):
            providers.append(
                {
                    "id": spec.id,
                    "name": spec.name,
                    "runtime": spec.runtime,
                    "default_base_url": spec.default_base_url or "",
                    "base_url_editable": spec.base_url_editable,
                    "requires_base_url": spec.requires_base_url,
                    "supports_api_key": spec.supports_api_key,
                    "api_key_label": spec.api_key_label,
                    "api_key_hint": spec.api_key_hint,
                    "supports_model_refresh": spec.supports_model_refresh,
                    "oauth_methods": [
                        {
                            "id": method.id,
                            "type": method.type,
                            "label": method.label,
                            "description": method.description,
                        }
                        for method in spec.oauth_methods
                    ],
                    "description": spec.description,
                    "auth_status": self.get_auth_status(spec.id),
                }
            )
        return providers

    def get_provider(self, provider_id: str) -> ProviderSpec:
        """按 provider id 获取定义。"""
        normalized = (provider_id or "").strip().lower()
        for spec in self._provider_specs():
            if spec.id == normalized:
                return spec
        raise LLMProviderError(f"不支持的 LLM 提供商：{provider_id}")

    @staticmethod
    def _sanitize_base_url(base_url: Optional[str]) -> Optional[str]:
        if base_url is None:
            return None
        value = str(base_url).strip()
        if not value:
            return None
        return value.rstrip("/")

    @staticmethod
    def _httpx_proxy_key() -> str:
        """兼容不同 httpx 版本的 proxy 参数名。"""
        params = httpx.Client.__init__.__code__.co_varnames
        return "proxy" if "proxy" in params else "proxies"

    def _build_httpx_kwargs(self) -> dict[str, Any]:
        kwargs: dict[str, Any] = {"timeout": self._DEFAULT_TIMEOUT}
        if settings.PROXY_HOST:
            kwargs[self._httpx_proxy_key()] = settings.PROXY_HOST
        return kwargs

    @staticmethod
    def _read_agent_config() -> dict[str, Any]:
        config = SystemConfigOper().get(SystemConfigKey.AIAgentConfig)
        if isinstance(config, dict):
            return config
        return {}

    @staticmethod
    async def _write_agent_config(value: dict[str, Any]) -> None:
        """
        使用异步持久化写回 provider 鉴权配置。

        `SystemConfigOper().get()` 读取的是内存缓存，这里保留同步调用；
        但写入需要落库，因此统一走 `async_set()`。
        """
        await SystemConfigOper().async_set(
            SystemConfigKey.AIAgentConfig,
            copy.deepcopy(value) or None,
        )

    def _get_auth_store(self) -> dict[str, Any]:
        config = self._read_agent_config()
        auth_store = config.get("provider_auth")
        if isinstance(auth_store, dict):
            return auth_store
        return {}

    def get_saved_auth(self, provider_id: str) -> dict[str, Any] | None:
        """读取持久化 provider 鉴权信息。"""
        return copy.deepcopy(self._get_auth_store().get(provider_id))

    async def save_auth(self, provider_id: str, auth_data: dict[str, Any]) -> None:
        """写入 provider 鉴权信息。"""
        config = self._read_agent_config()
        auth_store = config.get("provider_auth")
        if not isinstance(auth_store, dict):
            auth_store = {}
        auth_store[provider_id] = copy.deepcopy(auth_data)
        config["provider_auth"] = auth_store
        await self._write_agent_config(config)

    async def clear_auth(self, provider_id: str) -> None:
        """移除 provider 鉴权信息。"""
        config = self._read_agent_config()
        auth_store = config.get("provider_auth")
        if not isinstance(auth_store, dict):
            return
        auth_store.pop(provider_id, None)
        if auth_store:
            config["provider_auth"] = auth_store
        else:
            config.pop("provider_auth", None)
        await self._write_agent_config(config)

    def get_auth_status(self, provider_id: str) -> dict[str, Any]:
        """返回前端展示用的 provider 鉴权摘要。"""
        auth = self.get_saved_auth(provider_id)
        if not auth:
            return {"connected": False}
        return {
            "connected": True,
            "type": auth.get("type"),
            "label": auth.get("label") or auth.get("email") or auth.get("account_id") or "已授权",
            "expires_at": auth.get("expires_at"),
            "updated_at": auth.get("updated_at"),
        }

    async def _load_models_dev_from_disk(self) -> dict[str, Any] | None:
        try:
            if not self._models_dev_cache_path.exists():
                return None
            async with aiofiles.open(
                    self._models_dev_cache_path, mode="r", encoding="utf-8"
            ) as stream:
                return json.loads(await stream.read())
        except Exception as err:
            logger.warning(f"读取 models.dev 缓存失败: {err}")
            return None

    async def _write_models_dev_to_disk(self, payload: dict[str, Any]) -> None:
        try:
            self._models_dev_cache_path.parent.mkdir(parents=True, exist_ok=True)
            async with aiofiles.open(
                    self._models_dev_cache_path, mode="w", encoding="utf-8"
            ) as stream:
                await stream.write(json.dumps(payload, ensure_ascii=False))
        except Exception as err:
            logger.warning(f"写入 models.dev 缓存失败: {err}")

    async def _fetch_models_dev(self) -> dict[str, Any]:
        headers = {"User-Agent": "MoviePilot/1.0"}
        async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
            response = await client.get(self._MODELS_DEV_URL, headers=headers)
            response.raise_for_status()
            return response.json()

    async def get_models_dev_data(self, force_refresh: bool = False) -> dict[str, Any]:
        """
        返回 models.dev 原始数据。

        这里复用 opencode 的做法，把公共模型目录缓存到本地文件中，避免每次
        刷新模型列表都直接打到远端。
        """
        async with self._models_dev_lock:
            now = time.time()
            if (
                    not force_refresh
                    and self._models_dev_data is not None
                    and now - self._models_dev_loaded_at < self._MODELS_DEV_CACHE_TTL
            ):
                return self._models_dev_data

            if not force_refresh and self._models_dev_cache_path.exists():
                mtime = self._models_dev_cache_path.stat().st_mtime
                if now - mtime < self._MODELS_DEV_CACHE_TTL:
                    cached = await self._load_models_dev_from_disk()
                    if isinstance(cached, dict):
                        self._models_dev_data = cached
                        self._models_dev_loaded_at = now
                        return cached

            try:
                payload = await self._fetch_models_dev()
                self._models_dev_data = payload
                self._models_dev_loaded_at = now
                await self._write_models_dev_to_disk(payload)
                return payload
            except Exception as err:
                logger.warning(f"刷新 models.dev 失败，尝试回退本地缓存: {err}")
                cached = await self._load_models_dev_from_disk()
                if isinstance(cached, dict):
                    self._models_dev_data = cached
                    self._models_dev_loaded_at = now
                    return cached
                raise LLMProviderError(f"获取 models.dev 数据失败: {err}") from err

    async def _models_dev_provider_payload(self, provider_id: str) -> dict[str, Any]:
        spec = self.get_provider(provider_id)
        if not spec.models_dev_provider_id:
            return {}
        return (await self.get_models_dev_data()).get(spec.models_dev_provider_id, {}) or {}

    async def _models_dev_model(
            self, provider_id: str, model_id: str
    ) -> dict[str, Any] | None:
        payload = await self._models_dev_provider_payload(provider_id)
        models = payload.get("models") if isinstance(payload, dict) else None
        if not isinstance(models, dict):
            return None

        candidates = [model_id]
        if model_id.startswith("models/"):
            candidates.append(model_id.removeprefix("models/"))

        for candidate in candidates:
            if candidate in models:
                return models[candidate]
        return None

    @staticmethod
    def _normalize_model_record(
            model_id: str,
            display_name: Optional[str] = None,
            metadata: Optional[dict[str, Any]] = None,
            transport: str = "openai",
            live_context: Optional[int] = None,
            live_input: Optional[int] = None,
            live_output: Optional[int] = None,
            live_supports_tools: Optional[bool] = None,
            live_supports_reasoning: Optional[bool] = None,
            live_supports_image: Optional[bool] = None,
            live_supports_audio: Optional[bool] = None,
            source: str = "provider",
    ) -> dict[str, Any]:
        """
        统一输出模型记录格式，前端据此直接渲染和自动回填上下文等参数。
        """
        metadata = metadata or {}
        limit = metadata.get("limit") or {}
        modalities = metadata.get("modalities") or {}
        input_modalities = set(modalities.get("input") or [])

        context_tokens = live_context or limit.get("context")
        input_tokens = live_input or limit.get("input")
        output_tokens = live_output or limit.get("output")
        supports_image_input = (
            live_supports_image
            if live_supports_image is not None
            else "image" in input_modalities
        )
        supports_audio_input = (
            live_supports_audio
            if live_supports_audio is not None
            else "audio" in input_modalities
        )
        supports_tools = (
            live_supports_tools
            if live_supports_tools is not None
            else bool(metadata.get("tool_call"))
        )
        supports_reasoning = (
            live_supports_reasoning
            if live_supports_reasoning is not None
            else bool(metadata.get("reasoning"))
        )

        if context_tokens:
            try:
                ct_int = int(context_tokens)
                if ct_int % 1024 == 0 or ct_int == 1048576 or ct_int == 2097152:
                    context_tokens_k = max(1, ct_int // 1024)
                else:
                    context_tokens_k = max(1, (ct_int + 999) // 1000)
            except Exception:
                context_tokens_k = None
        else:
            context_tokens_k = None

        return {
            "id": model_id,
            "name": display_name or metadata.get("name") or model_id,
            "family": metadata.get("family"),
            "context_tokens": context_tokens,
            "input_tokens": input_tokens,
            "output_tokens": output_tokens,
            "context_tokens_k": context_tokens_k,
            "supports_reasoning": supports_reasoning,
            "supports_tools": supports_tools,
            "supports_image_input": supports_image_input,
            "supports_audio_input": supports_audio_input,
            "transport": transport,
            "source": source,
            "release_date": metadata.get("release_date"),
            "status": metadata.get("status"),
        }

    def _normalize_base_url_for_anthropic(self, base_url: str) -> str:
        normalized = self._sanitize_base_url(base_url) or ""
        if normalized.endswith("/v1"):
            return normalized[:-3]
        return normalized

    async def _list_models_from_google(self, api_key: str) -> list[dict[str, Any]]:
        from google import genai
        from google.genai.types import HttpOptions

        http_options = None
        if settings.PROXY_HOST:
            proxy_key = self._httpx_proxy_key()
            proxy_args = {proxy_key: settings.PROXY_HOST}
            http_options = HttpOptions(
                client_args=proxy_args,
                async_client_args=proxy_args,
            )

        client = genai.Client(api_key=api_key, http_options=http_options)
        response = await client.aio.models.list()
        results = []
        for model in response.page:
            supported = set(model.supported_actions or [])
            if "generateContent" not in supported:
                continue
            model_id = model.name
            metadata = await self._models_dev_model("google", model_id) or {}
            results.append(
                self._normalize_model_record(
                    model_id=model_id,
                    display_name=model.display_name or metadata.get("name") or model_id,
                    metadata=metadata,
                    source="provider",
                )
            )
        return sorted(results, key=lambda item: item["name"].lower())

    async def _list_models_from_openai_compatible(
            self,
            provider_id: str,
            api_key: str,
            base_url: str,
            default_headers: Optional[dict[str, str]] = None,
    ) -> list[dict[str, Any]]:
        from openai import AsyncOpenAI

        client = AsyncOpenAI(
            api_key=api_key,
            base_url=base_url,
            default_headers=default_headers,
            timeout=15.0,
            max_retries=2,
        )
        results = []
        response = await client.models.list()
        for model in response.data:
            metadata = await self._models_dev_model(provider_id, model.id) or {}
            results.append(
                self._normalize_model_record(
                    model_id=model.id,
                    display_name=metadata.get("name") or model.id,
                    metadata=metadata,
                    source="provider",
                )
            )
        return sorted(results, key=lambda item: item["name"].lower())

    async def _list_models_from_models_dev_only(
            self,
            provider_id: str,
            transport: str = "openai",
    ) -> list[dict[str, Any]]:
        """
        某些 provider 没有统一稳定的 models.list 行为，
        因此优先读取 models.dev 目录；若未来 provider 暴露标准 models 接口，
        再平滑补充实时刷新即可。
        """
        payload = await self._models_dev_provider_payload(provider_id)
        models = payload.get("models") if isinstance(payload, dict) else None
        if not isinstance(models, dict):
            raise LLMProviderError(f"{provider_id} 暂无可用模型目录")
        results = []
        for model_id, metadata in models.items():
            results.append(
                self._normalize_model_record(
                    model_id=model_id,
                    display_name=metadata.get("name") or model_id,
                    metadata=metadata,
                    transport=transport,
                    source="models.dev",
                )
            )
        return sorted(results, key=lambda item: item["name"].lower())

    @staticmethod
    def _copilot_headers(
            token: Optional[str] = None, include_auth: bool = True
    ) -> dict[str, str]:
        """
        构造 GitHub Copilot 请求头。

        OpenAI-compatible 调用会由 SDK 自行补 Authorization，因此这里允许
        仅补充 Copilot 必需的意图头，避免重复覆盖。
        """
        headers = {
            "User-Agent": "MoviePilot/1.0",
            "Openai-Intent": "conversation-edits",
            "x-initiator": "user",
        }
        if include_auth and token:
            headers["Authorization"] = f"Bearer {token}"
        return headers

    async def _list_models_from_copilot(self, token: str) -> list[dict[str, Any]]:
        async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
            response = await client.get(
                "https://api.githubcopilot.com/models",
                headers=self._copilot_headers(token),
            )
            response.raise_for_status()
            payload = response.json()

        raw_models = payload.get("data") if isinstance(payload, dict) else None
        if not isinstance(raw_models, list):
            raise LLMProviderError("GitHub Copilot 模型列表响应格式不正确")

        results = []
        for item in raw_models:
            if not isinstance(item, dict):
                continue
            if not item.get("model_picker_enabled", True):
                continue
            if (item.get("policy") or {}).get("state") == "disabled":
                continue

            model_id = str(item.get("id") or "").strip()
            if not model_id:
                continue

            endpoints = set(item.get("supported_endpoints") or [])
            # 优先兼容 OpenAI 风格端点；仅在缺失时再切到 Anthropic 风格消息接口。
            transport = (
                "anthropic"
                if "/v1/messages" in endpoints
                   and "/v1/chat/completions" not in endpoints
                   and "/v1/responses" not in endpoints
                else "openai"
            )

            limits = ((item.get("capabilities") or {}).get("limits") or {})
            supports = ((item.get("capabilities") or {}).get("supports") or {})
            metadata = await self._models_dev_model("github-copilot", model_id) or {}
            results.append(
                self._normalize_model_record(
                    model_id=model_id,
                    display_name=item.get("name") or metadata.get("name") or model_id,
                    metadata=metadata,
                    transport=transport,
                    live_context=limits.get("max_context_window_tokens"),
                    live_input=limits.get("max_prompt_tokens"),
                    live_output=limits.get("max_output_tokens"),
                    live_supports_tools=supports.get("tool_calls"),
                    live_supports_reasoning=bool(
                        supports.get("adaptive_thinking")
                        or supports.get("reasoning_effort")
                        or supports.get("max_thinking_budget") is not None
                        or supports.get("min_thinking_budget") is not None
                    ),
                    live_supports_image=bool(
                        supports.get("vision")
                        or ((limits.get("vision") or {}).get("supported_media_types"))
                    ),
                    source="provider",
                )
            )
        return sorted(results, key=lambda i: i["name"].lower())

    async def _list_chatgpt_oauth_models(self) -> list[dict[str, Any]]:
        payload = await self._models_dev_provider_payload("chatgpt")
        models = payload.get("models") if isinstance(payload, dict) else None
        if not isinstance(models, dict):
            return [
                {
                    "id": model_id,
                    "name": model_id,
                    "context_tokens": None,
                    "input_tokens": None,
                    "output_tokens": None,
                    "context_tokens_k": settings.LLM_MAX_CONTEXT_TOKENS,
                    "supports_reasoning": True,
                    "supports_tools": True,
                    "supports_image_input": True,
                    "supports_audio_input": False,
                    "transport": "openai",
                    "source": "builtin",
                    "release_date": None,
                    "status": None,
                }
                for model_id in sorted(self._CHATGPT_ALLOWED_OAUTH_MODELS)
            ]

        results = []
        for model_id, metadata in models.items():
            if "codex" in model_id or model_id in self._CHATGPT_ALLOWED_OAUTH_MODELS:
                match = None
                if model_id.startswith("gpt-"):
                    try:
                        match = float(model_id.split("-")[1].replace(".mini", ""))
                    except Exception as err:
                        print(err)
                        match = None
                if match is not None and match > 5.4 and "codex" not in model_id:
                    continue
                results.append(
                    self._normalize_model_record(
                        model_id=model_id,
                        display_name=metadata.get("name") or model_id,
                        metadata=metadata,
                        source="models.dev",
                    )
                )
        return sorted(results, key=lambda item: item["name"].lower())

    async def list_models(
            self,
            provider_id: str,
            api_key: Optional[str] = None,
            base_url: Optional[str] = None,
            force_refresh: bool = False,
    ) -> list[dict[str, Any]]:
        """返回标准化后的模型目录。"""
        spec = self.get_provider(provider_id)
        if force_refresh and spec.models_dev_provider_id:
            # 对依赖 models.dev 的 provider 主动刷新一次缓存，保证“刷新模型列表”
            # 在使用目录型 provider 时也能拿到最新参数。
            await self.get_models_dev_data(force_refresh=True)
        runtime = await self.resolve_runtime(
            provider_id,
            model=None,
            api_key=api_key,
            base_url=base_url,
        )

        if spec.model_list_strategy == "google":
            return await self._list_models_from_google(runtime["api_key"])

        if spec.model_list_strategy == "github_copilot":
            return await self._list_models_from_copilot(runtime["api_key"])

        if spec.model_list_strategy == "chatgpt":
            if runtime.get("auth_mode") == "oauth":
                return await self._list_chatgpt_oauth_models()
            return await self._list_models_from_openai_compatible(
                provider_id="chatgpt",
                api_key=runtime["api_key"],
                base_url=runtime["base_url"],
                default_headers=runtime.get("default_headers"),
            )

        if spec.model_list_strategy == "anthropic_compatible":
            return await self._list_models_from_models_dev_only(
                provider_id=provider_id,
                transport="anthropic",
            )
            
        if spec.model_list_strategy == "models_dev_only":
            return await self._list_models_from_models_dev_only(
                provider_id=provider_id,
                transport="openai",
            )

        # openai-compatible / deepseek 默认走官方 models 端点。
        return await self._list_models_from_openai_compatible(
            provider_id=provider_id,
            api_key=runtime["api_key"],
            base_url=runtime["base_url"],
            default_headers=runtime.get("default_headers"),
        )

    async def resolve_model_metadata(
            self, provider_id: str, model_id: Optional[str]
    ) -> dict[str, Any] | None:
        if not model_id:
            return None
        metadata = await self._models_dev_model(provider_id, model_id)
        if metadata:
            return metadata
        if provider_id == "chatgpt":
            return await self._models_dev_model("openai", model_id)
        if provider_id == "openai":
            models_dev = await self.get_models_dev_data()
            return models_dev.get("openai", {}).get("models", {}).get(model_id)
        return None

    @staticmethod
    def _jwt_claims(token: str) -> dict[str, Any]:
        try:
            return jwt.decode(token, options={"verify_signature": False})
        except Exception as err:
            print(err)
            return {}

    @staticmethod
    def _extract_chatgpt_account_id(token_payload: dict[str, Any]) -> Optional[str]:
        if token_payload.get("chatgpt_account_id"):
            return token_payload["chatgpt_account_id"]
        auth_payload = token_payload.get("https://api.openai.com/auth") or {}
        if auth_payload.get("chatgpt_account_id"):
            return auth_payload["chatgpt_account_id"]
        organizations = token_payload.get("organizations") or []
        if organizations and isinstance(organizations[0], dict):
            return organizations[0].get("id")
        return None

    def _chatgpt_authorize_url(
            self, redirect_uri: str, challenge: str, state: str
    ) -> str:
        query = urlencode(
            {
                "response_type": "code",
                "client_id": self._CHATGPT_CLIENT_ID,
                "redirect_uri": redirect_uri,
                "scope": "openid profile email offline_access",
                "code_challenge": challenge,
                "code_challenge_method": "S256",
                "id_token_add_organizations": "true",
                "codex_cli_simplified_flow": "true",
                "state": state,
                "originator": "moviepilot",
            }
        )
        return f"{self._CHATGPT_ISSUER}/oauth/authorize?{query}"

    @staticmethod
    def _pkce_pair() -> tuple[str, str]:
        verifier = secrets.token_urlsafe(64).replace("=", "")
        digest = hashlib.sha256(verifier.encode("utf-8")).digest()
        challenge = base64.urlsafe_b64encode(digest).decode("utf-8").rstrip("=")
        return verifier, challenge

    async def start_auth(
            self,
            provider_id: str,
            method_id: str,
            callback_url: Optional[str] = None,
    ) -> dict[str, Any]:
        """
        启动 OAuth / device code 会话。

        API Key 方式已经由普通设置表单覆盖，这里只处理需要交互式授权的 provider。
        """
        provider = self.get_provider(provider_id)
        method = next(
            (item for item in provider.oauth_methods if item.id == method_id),
            None,
        )
        if not method:
            raise LLMProviderAuthError(f"{provider.name} 不支持授权方式：{method_id}")

        session = PendingAuthSession(
            session_id=secrets.token_urlsafe(18),
            provider_id=provider_id,
            method_id=method_id,
            flow_type=method.type,
            expires_at=time.time() + 600,
        )

        if provider_id == "chatgpt" and method_id == "browser_oauth":
            if not callback_url:
                raise LLMProviderAuthError("ChatGPT 浏览器授权缺少回调地址")
            verifier, challenge = self._pkce_pair()
            state = secrets.token_urlsafe(24)
            session.authorize_url = self._chatgpt_authorize_url(
                redirect_uri=callback_url,
                challenge=challenge,
                state=state,
            )
            session.instructions = "请在浏览器中完成 ChatGPT Plus/Pro 登录授权。"
            session.context.update(
                {
                    "code_verifier": verifier,
                    "state": state,
                    "redirect_uri": callback_url,
                }
            )
            with self._lock:
                self._pending_sessions[session.session_id] = session
                self._oauth_state_index[state] = session.session_id
            return {
                "session_id": session.session_id,
                "flow_type": "oauth_browser",
                "authorize_url": session.authorize_url,
                "instructions": session.instructions,
                "expires_at": session.expires_at,
            }

        if provider_id == "chatgpt" and method_id == "device_code":
            async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
                response = await client.post(
                    f"{self._CHATGPT_ISSUER}/api/accounts/deviceauth/usercode",
                    headers={
                        "Content-Type": "application/json",
                        "User-Agent": "MoviePilot/1.0",
                    },
                    json={"client_id": self._CHATGPT_CLIENT_ID},
                )
                response.raise_for_status()
                payload = response.json()

            session.verification_url = f"{self._CHATGPT_ISSUER}/codex/device"
            session.user_code = payload.get("user_code")
            session.interval_seconds = max(int(payload.get("interval") or 5), 1)
            session.instructions = f"请在浏览器输入设备码：{session.user_code}"
            session.context.update(
                {
                    "device_auth_id": payload.get("device_auth_id"),
                    "user_code": payload.get("user_code"),
                }
            )
            with self._lock:
                self._pending_sessions[session.session_id] = session
            return {
                "session_id": session.session_id,
                "flow_type": "device_code",
                "verification_url": session.verification_url,
                "user_code": session.user_code,
                "interval_seconds": session.interval_seconds,
                "instructions": session.instructions,
                "expires_at": session.expires_at,
            }

        if provider_id == "github-copilot" and method_id == "device_code":
            async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
                response = await client.post(
                    "https://github.com/login/device/code",
                    headers={
                        "Accept": "application/json",
                        "Content-Type": "application/json",
                        "User-Agent": "MoviePilot/1.0",
                    },
                    json={
                        "client_id": self._COPILOT_CLIENT_ID,
                        "scope": "read:user",
                    },
                )
                response.raise_for_status()
                payload = response.json()

            session.verification_url = payload.get("verification_uri")
            session.user_code = payload.get("user_code")
            session.interval_seconds = max(int(payload.get("interval") or 5), 1)
            session.instructions = f"请在 GitHub 页面输入设备码：{session.user_code}"
            session.context.update(
                {
                    "device_code": payload.get("device_code"),
                }
            )
            with self._lock:
                self._pending_sessions[session.session_id] = session
            return {
                "session_id": session.session_id,
                "flow_type": "device_code",
                "verification_url": session.verification_url,
                "user_code": session.user_code,
                "interval_seconds": session.interval_seconds,
                "instructions": session.instructions,
                "expires_at": session.expires_at,
            }

        raise LLMProviderAuthError(f"暂未实现 {provider.name} 的授权方式：{method.label}")

    def get_session_status(self, session_id: str) -> dict[str, Any]:
        """读取临时授权会话状态。"""
        with self._lock:
            session = self._pending_sessions.get(session_id)
            if not session:
                raise LLMProviderAuthError("授权会话不存在或已过期")
            return {
                "session_id": session.session_id,
                "provider_id": session.provider_id,
                "status": session.status,
                "message": session.message,
                "user_code": session.user_code,
                "verification_url": session.verification_url,
                "authorize_url": session.authorize_url,
                "instructions": session.instructions,
                "interval_seconds": session.interval_seconds,
                "expires_at": session.expires_at,
            }

    async def _mark_session_success(
            self, session: PendingAuthSession, auth_data: dict[str, Any]
    ) -> None:
        auth_data["updated_at"] = int(time.time())
        await self.save_auth(session.provider_id, auth_data)
        session.status = "authorized"
        session.message = "授权成功"

    @staticmethod
    def _mark_session_error(session: PendingAuthSession, message: str) -> None:
        session.status = "failed"
        session.message = message

    async def handle_chatgpt_callback(
            self,
            provider_id: str,
            code: Optional[str],
            state: Optional[str],
            error: Optional[str],
            error_description: Optional[str],
    ) -> tuple[bool, str]:
        """处理 ChatGPT 浏览器 OAuth 回调。"""
        if provider_id != "chatgpt":
            return False, "当前 provider 不支持浏览器 OAuth 回调"

        if error:
            message = error_description or error
            with self._lock:
                session_id = self._oauth_state_index.pop(state or "", None)
                if session_id and session_id in self._pending_sessions:
                    self._mark_session_error(self._pending_sessions[session_id], message)
            return False, message

        if not code or not state:
            return False, "缺少授权码或 state 参数"

        with self._lock:
            session_id = self._oauth_state_index.pop(state, None)
            session = self._pending_sessions.get(session_id or "")

        if not session:
            return False, "授权会话不存在或已失效"

        if state != session.context.get("state"):
            self._mark_session_error(session, "state 校验失败")
            return False, "state 校验失败"

        try:
            payload = await self._exchange_chatgpt_code_for_tokens(
                code=code,
                redirect_uri=session.context["redirect_uri"],
                code_verifier=session.context["code_verifier"],
            )
            claims = self._jwt_claims(payload.get("id_token") or payload["access_token"])
            account_id = self._extract_chatgpt_account_id(claims)
            auth_data = {
                "type": "oauth",
                "provider": "chatgpt",
                "access_token": payload["access_token"],
                "refresh_token": payload["refresh_token"],
                "expires_at": int(time.time() + int(payload.get("expires_in") or 3600)),
                "account_id": account_id,
                "email": claims.get("email"),
                "label": claims.get("email") or account_id or "ChatGPT Plus/Pro",
            }
            await self._mark_session_success(session, auth_data)
            return True, "ChatGPT 授权成功"
        except Exception as err:
            message = f"ChatGPT 授权失败: {err}"
            self._mark_session_error(session, message)
            return False, message

    async def poll_auth_session(self, session_id: str) -> dict[str, Any]:
        """
        执行一次 device code 轮询，并返回最新状态。

        前端可按 interval_seconds 轮询，直到状态变为 authorized / failed。
        """
        with self._lock:
            session = self._pending_sessions.get(session_id)
        if not session:
            raise LLMProviderAuthError("授权会话不存在或已过期")
        if session.status != "pending":
            return self.get_session_status(session_id)

        try:
            if session.provider_id == "chatgpt" and session.method_id == "device_code":
                await self._poll_chatgpt_device_auth(session)
            elif session.provider_id == "github-copilot" and session.method_id == "device_code":
                await self._poll_copilot_device_auth(session)
            else:
                raise LLMProviderAuthError("当前授权会话不支持轮询")
        except Exception as err:
            self._mark_session_error(session, str(err))
        return self.get_session_status(session_id)

    async def _exchange_chatgpt_code_for_tokens(
            self, code: str, redirect_uri: str, code_verifier: str
    ) -> dict[str, Any]:
        async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
            response = await client.post(
                f"{self._CHATGPT_ISSUER}/oauth/token",
                headers={"Content-Type": "application/x-www-form-urlencoded"},
                data={
                    "grant_type": "authorization_code",
                    "code": code,
                    "redirect_uri": redirect_uri,
                    "client_id": self._CHATGPT_CLIENT_ID,
                    "code_verifier": code_verifier,
                },
            )
            response.raise_for_status()
            return response.json()

    async def _refresh_chatgpt_tokens(self, refresh_token: str) -> dict[str, Any]:
        async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
            response = await client.post(
                f"{self._CHATGPT_ISSUER}/oauth/token",
                headers={"Content-Type": "application/x-www-form-urlencoded"},
                data={
                    "grant_type": "refresh_token",
                    "refresh_token": refresh_token,
                    "client_id": self._CHATGPT_CLIENT_ID,
                },
            )
            response.raise_for_status()
            return response.json()

    async def _poll_chatgpt_device_auth(self, session: PendingAuthSession) -> None:
        async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
            response = await client.post(
                f"{self._CHATGPT_ISSUER}/api/accounts/deviceauth/token",
                headers={
                    "Content-Type": "application/json",
                    "User-Agent": "MoviePilot/1.0",
                },
                json={
                    "device_auth_id": session.context["device_auth_id"],
                    "user_code": session.context["user_code"],
                },
            )

        if response.status_code in {403, 404}:
            session.message = "等待用户在浏览器完成授权"
            return

        response.raise_for_status()
        payload = response.json()
        token_payload = await self._exchange_chatgpt_code_for_tokens(
            code=payload["authorization_code"],
            redirect_uri=f"{self._CHATGPT_ISSUER}/deviceauth/callback",
            code_verifier=payload["code_verifier"],
        )
        claims = self._jwt_claims(
            token_payload.get("id_token") or token_payload["access_token"]
        )
        account_id = self._extract_chatgpt_account_id(claims)
        await self._mark_session_success(
            session,
            {
                "type": "oauth",
                "provider": "chatgpt",
                "access_token": token_payload["access_token"],
                "refresh_token": token_payload["refresh_token"],
                "expires_at": int(time.time() + int(token_payload.get("expires_in") or 3600)),
                "account_id": account_id,
                "email": claims.get("email"),
                "label": claims.get("email") or account_id or "ChatGPT Plus/Pro",
            },
        )

    async def _poll_copilot_device_auth(self, session: PendingAuthSession) -> None:
        async with httpx.AsyncClient(**self._build_httpx_kwargs()) as client:
            response = await client.post(
                "https://github.com/login/oauth/access_token",
                headers={
                    "Accept": "application/json",
                    "Content-Type": "application/json",
                    "User-Agent": "MoviePilot/1.0",
                },
                json={
                    "client_id": self._COPILOT_CLIENT_ID,
                    "device_code": session.context["device_code"],
                    "grant_type": "urn:ietf:params:oauth:grant-type:device_code",
                },
            )
            response.raise_for_status()
            payload = response.json()

        access_token = payload.get("access_token")
        if access_token:
            await self._mark_session_success(
                session,
                {
                    "type": "oauth",
                    "provider": "github-copilot",
                    "access_token": access_token,
                    # Copilot 设备码授权返回的是长期可复用 token，这里复用 access 字段即可。
                    "refresh_token": access_token,
                    "expires_at": None,
                    "label": "GitHub Copilot",
                },
            )
            return

        error = payload.get("error")
        if error == "authorization_pending":
            session.message = "等待用户在 GitHub 页面完成授权"
            return
        if error == "slow_down":
            session.interval_seconds = max(session.interval_seconds + 5, 10)
            session.message = "GitHub 要求降低轮询频率，稍后继续。"
            return
        if error:
            raise LLMProviderAuthError(f"GitHub Copilot 授权失败: {error}")

    async def _resolve_chatgpt_oauth(self) -> dict[str, Any]:
        auth = self.get_saved_auth("chatgpt")
        if not auth or auth.get("type") != "oauth":
            raise LLMProviderAuthError("尚未完成 ChatGPT Plus/Pro 授权")

        expires_at = auth.get("expires_at")
        refresh_token = auth.get("refresh_token")
        # 预留 60 秒刷新缓冲，避免刚发起请求就遇到过期。
        if expires_at and refresh_token and int(expires_at) <= int(time.time()) + 60:
            payload = await self._refresh_chatgpt_tokens(refresh_token)
            claims = self._jwt_claims(payload.get("id_token") or payload["access_token"])
            auth.update(
                {
                    "access_token": payload["access_token"],
                    "refresh_token": payload.get("refresh_token") or refresh_token,
                    "expires_at": int(time.time() + int(payload.get("expires_in") or 3600)),
                    "account_id": auth.get("account_id")
                                  or self._extract_chatgpt_account_id(claims),
                    "email": auth.get("email") or claims.get("email"),
                    "label": auth.get("label")
                             or claims.get("email")
                             or auth.get("account_id")
                             or "ChatGPT Plus/Pro",
                }
            )
            await self.save_auth("chatgpt", auth)
        return auth

    async def resolve_runtime(
            self,
            provider_id: str,
            model: Optional[str],
            api_key: Optional[str] = None,
            base_url: Optional[str] = None,
    ) -> dict[str, Any]:
        """
        解析 provider 运行时参数。

        返回统一结构，供 `LLMHelper` 创建具体 LangChain 模型实例时使用。
        """
        spec = self.get_provider(provider_id)
        normalized_api_key = str(api_key or "").strip() or None
        normalized_base_url = self._sanitize_base_url(base_url)
        model_record = None
        if model:
            try:
                model_record = next(
                    (
                        item
                        for item in await self.list_models(
                        provider_id,
                        api_key=api_key,
                        base_url=base_url,
                    )
                        if item["id"] == model
                    ),
                    None,
                )
            except Exception as err:
                print(err)
                model_record = None

        result: dict[str, Any] = {
            "provider_id": provider_id,
            "runtime": spec.runtime,
            "model_id": model,
            "model_record": model_record,
            "model_metadata": await self.resolve_model_metadata(provider_id, model),
            "default_headers": None,
            "use_responses_api": None,
            "auth_mode": "api_key",
        }

        if provider_id == "chatgpt":
            auth = None
            try:
                auth = await self._resolve_chatgpt_oauth()
            except Exception as err:
                print(err)
                pass

            if auth:
                headers = {"originator": "moviepilot"}
                if auth.get("account_id"):
                    headers["ChatGPT-Account-Id"] = auth["account_id"]
                result.update(
                    {
                        "runtime": "chatgpt",
                        "api_key": auth["access_token"],
                        "base_url": self._CHATGPT_CODEX_BASE_URL,
                        "default_headers": headers,
                        "use_responses_api": True,
                        "auth_mode": "oauth",
                    }
                )
                return result

            if normalized_api_key:
                result.update(
                    {
                        "runtime": "openai_compatible",
                        "api_key": normalized_api_key,
                        "base_url": normalized_base_url or spec.default_base_url,
                        "auth_mode": "api_key",
                    }
                )
                return result

            raise LLMProviderAuthError("请提供 API Key 或完成 ChatGPT 授权")

        if provider_id == "github-copilot":
            auth = self.get_saved_auth("github-copilot")
            if auth and auth.get("type") == "oauth":
                token = auth.get("refresh_token") or auth.get("access_token")
            elif normalized_api_key:
                token = normalized_api_key
            else:
                raise LLMProviderAuthError("请先完成 GitHub Copilot 授权")

            transport = (model_record or {}).get("transport") or "openai"
            result.update(
                {
                    "runtime": "copilot_anthropic"
                    if transport == "anthropic"
                    else "github_copilot",
                    "api_key": token,
                    "base_url": "https://api.githubcopilot.com",
                    "default_headers": self._copilot_headers(
                        token,
                        include_auth=transport == "anthropic",
                    ),
                    "auth_mode": "oauth" if auth else "api_key",
                }
            )
            return result

        if spec.runtime == "google":
            if not normalized_api_key:
                raise LLMProviderAuthError(f"{spec.name} 需要填写 API Key")
            result.update(
                {
                    "api_key": normalized_api_key,
                    "base_url": None,
                    "auth_mode": "api_key",
                }
            )
            return result

        if spec.runtime == "anthropic_compatible":
            effective_base_url = normalized_base_url or spec.default_base_url
            if not normalized_api_key:
                raise LLMProviderAuthError(f"{spec.name} 需要填写 API Key")
            if not effective_base_url:
                raise LLMProviderAuthError(f"{spec.name} 缺少 Base URL")
            result.update(
                {
                    "api_key": normalized_api_key,
                    "base_url": self._normalize_base_url_for_anthropic(
                        effective_base_url
                    ),
                    "auth_mode": "api_key",
                }
            )
            return result

        effective_base_url = normalized_base_url or spec.default_base_url
        if spec.requires_base_url and not effective_base_url:
            raise LLMProviderAuthError(f"{spec.name} 需要填写 Base URL")
        if not normalized_api_key:
            raise LLMProviderAuthError(f"{spec.name} 需要填写 API Key")
        result.update(
            {
                "api_key": normalized_api_key,
                "base_url": effective_base_url,
                "auth_mode": "api_key",
            }
        )
        return result


def render_auth_result_html(success: bool, message: str) -> str:
    """OAuth 回调落地页。"""
    title = "授权成功" if success else "授权失败"
    accent = "#3aa675" if success else "#e24b4b"
    return f"""<!doctype html>
<html lang="zh-CN">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>{title}</title>
    <style>
      body {{
        margin: 0;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #101418;
        color: #f3f5f7;
        font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      }}
      .card {{
        width: min(480px, calc(100vw - 32px));
        padding: 28px 24px;
        border-radius: 18px;
        background: rgba(20, 28, 36, 0.92);
        box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
      }}
      h1 {{
        margin: 0 0 12px;
        font-size: 24px;
        color: {accent};
      }}
      p {{
        margin: 0;
        line-height: 1.7;
        color: #d4dbe3;
      }}
    </style>
  </head>
  <body>
    <div class="card">
      <h1>{title}</h1>
      <p>{message}</p>
    </div>
    <script>
      if (window.opener) {{
        try {{
          window.opener.postMessage({json.dumps({"type": "moviepilot-llm-auth", "success": success})}, "*");
        }} catch (err) {{}}
      }}
      setTimeout(() => window.close(), 1800);
    </script>
  </body>
</html>"""