#  Copyright 2026 zhaoxi826
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

from fastapi import APIRouter, Depends
from pydantic import BaseModel, Field
from typing import Any, Dict, Literal, Optional
from kilostar.utils.access import TokenData, Accessor, RoleChecker
from kilostar.core.postgres_database.model import UserAuthority
from kilostar.core.global_state_machine.model_provider.base_provider import Provider
from kilostar.utils.ray_hook import ray_actor_hook

provider_router = APIRouter(prefix="/api/v1/provider", tags=["provider"])


class ProviderRegister(BaseModel):
    """``POST /provider`` 入参：注册一个模型 Provider 的最小字段集。"""

    provider_type: Literal["openai", "claude", "deepseek", "gemini"]
    provider_title: str
    provider_url: str
    provider_apikey: str
    model_settings: Optional[Dict[str, Dict[str, Any]]] = Field(default=None)


@provider_router.post("")
async def create_provider(
    provider_register: ProviderRegister,
    token_data: TokenData = Depends(RoleChecker(allowed_roles=UserAuthority.USER)),
) -> None:
    """注册一个 Provider；owner 为当前登录用户的 ``user_id``。"""
    global_state_machine = ray_actor_hook("global_state_machine").global_state_machine
    await global_state_machine.add_provider_wrap.remote(
        provider_type=provider_register.provider_type,
        provider_title=provider_register.provider_title,
        provider_url=provider_register.provider_url,
        provider_apikey=provider_register.provider_apikey,
        provider_owner=token_data.user_id,
        model_settings=provider_register.model_settings or {},
    )


def _mask_apikey(key: str) -> str:
    if not key or len(key) <= 8:
        return "***"
    return key[:4] + "***" + key[-4:]


@provider_router.get("/list")
async def get_provider_list(
    _: TokenData = Depends(Accessor.get_current_user),
) -> Dict[str, Any]:
    """返回当前所有已注册的 Provider，前端用以展示模型清单。apikey 脱敏。"""
    global_state_machine = ray_actor_hook("global_state_machine").global_state_machine
    provider_list: Dict[
        str, Provider
    ] = await global_state_machine.get_provider_list.remote()
    masked = {}
    for title, p in provider_list.items():
        d = p.model_dump() if hasattr(p, "model_dump") else dict(p)
        d["provider_apikey"] = _mask_apikey(d.get("provider_apikey", ""))
        masked[title] = d
    return {"provider_list": masked}


@provider_router.post("/test")
async def test_provider_connection(
    provider_register: ProviderRegister,
    _: TokenData = Depends(Accessor.get_current_user),
) -> Dict[str, Any]:
    """测试 Provider 连接：按 provider_type 选择对应协议拉取模型列表。"""
    import httpx

    ptype = provider_register.provider_type
    url = provider_register.provider_url
    apikey = provider_register.provider_apikey

    try:
        async with httpx.AsyncClient(timeout=10.0) as client:
            if ptype == "claude":
                endpoint = f"{url}/v1/models"
                headers = {
                    "x-api-key": apikey,
                    "anthropic-version": "2023-06-01",
                }
                response = await client.get(endpoint, headers=headers)
                if response.status_code == 200:
                    data = response.json()
                    models = [m["id"] for m in data.get("data", [])]
                    return {"success": True, "models": sorted(models), "model_count": len(models)}
                return {"success": False, "error": f"HTTP {response.status_code}", "models": []}

            elif ptype == "gemini":
                endpoint = f"{url}/models"
                params = {"key": apikey}
                response = await client.get(endpoint, params=params)
                if response.status_code == 200:
                    data = response.json()
                    models = [m.get("name", "").removeprefix("models/") for m in data.get("models", [])]
                    return {"success": True, "models": sorted(models), "model_count": len(models)}
                return {"success": False, "error": f"HTTP {response.status_code}", "models": []}

            else:
                if "/v1" not in url:
                    endpoint = f"{url}/v1/models"
                else:
                    endpoint = f"{url}/models"
                headers = {
                    "Authorization": f"Bearer {apikey}",
                    "Content-Type": "application/json",
                }
                response = await client.get(endpoint, headers=headers)
                if response.status_code == 200:
                    data = response.json()
                    models = [m["id"] for m in data.get("data", [])]
                    return {"success": True, "models": sorted(models), "model_count": len(models)}
                return {"success": False, "error": f"HTTP {response.status_code}", "models": []}

    except Exception as e:
        return {"success": False, "error": str(e), "models": []}


@provider_router.delete("/{provider_title}")
async def delete_provider(
    provider_title: str,
    _: TokenData = Depends(
        RoleChecker(allowed_roles=UserAuthority.SUPER_ADMINISTRATOR)
    ),
) -> dict:
    """删除指定 ``provider_title`` 的 Provider；仅超管可调用。"""
    global_state_machine = ray_actor_hook("global_state_machine").global_state_machine
    await global_state_machine.delete_provider.remote(provider_title=provider_title)
    return {"message": "success"}