from fastapi import APIRouter, HTTPException, status, Depends
from pydantic import BaseModel
from typing import Optional, Annotated
from datetime import datetime
from ..db.ai_config import (
    get_config_by_app_name,
    create_config,
    update_config,
    delete_config,
    get_all_configs
)
from ..dependencies.auth import resolve_user_id

router = APIRouter()


class AIConfigCreate(BaseModel):
    appName: str
    knowledgeId: str
    apiKey: str
    baseUrl: str


class AIConfigUpdate(BaseModel):
    knowledgeId: Optional[str] = None
    apiKey: Optional[str] = None
    baseUrl: Optional[str] = None
    status: Optional[int] = None


class AIConfigResponse(BaseModel):
    id: str
    appName: str
    knowledgeId: str
    apiKey: str
    baseUrl: str
    status: int
    deleted: int
    createdAt: datetime
    updatedAt: datetime


@router.post("/", response_model=dict, summary="创建AI配置", description="创建新的AI应用配置映射")
async def create_ai_config(
    config: AIConfigCreate
) -> dict:
    """创建新的AI配置"""
    existing = get_config_by_app_name(config.appName)
    if existing:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"appName '{config.appName}' 已存在"
        )

    config_id = create_config(config.model_dump())
    if not config_id:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="创建配置失败"
        )

    return {
        "message": "配置创建成功",
        "id": config_id,
        "appName": config.appName
    }


@router.get("/{app_name}", response_model=dict, summary="获取AI配置", description="根据appName获取AI配置")
async def get_ai_config(
    app_name: str
) -> dict:
    """获取指定appName的配置"""
    config = get_config_by_app_name(app_name)
    if not config:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"appName '{app_name}' 的配置不存在"
        )
    return config


@router.put("/{app_name}", response_model=dict, summary="更新AI配置", description="更新指定appName的AI配置")
async def update_ai_config(
    app_name: str,
    config_update: AIConfigUpdate
) -> dict:
    """更新指定appName的配置"""
    existing = get_config_by_app_name(app_name)
    if not existing:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"appName '{app_name}' 的配置不存在"
        )

    update_data = {k: v for k, v in config_update.model_dump().items() if v is not None}
    if not update_data:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="没有要更新的字段"
        )

    matched = update_config(app_name, update_data)
    if matched == 0:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="更新配置失败"
        )

    return {
        "message": "配置更新成功",
        "appName": app_name
    }


@router.delete("/{app_name}", response_model=dict, summary="删除AI配置", description="删除指定appName的AI配置")
async def delete_ai_config(
    app_name: str
) -> dict:
    """删除指定appName的配置"""
    existing = get_config_by_app_name(app_name)
    if not existing:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"appName '{app_name}' 的配置不存在"
        )

    matched = delete_config(app_name)
    if matched == 0:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="删除配置失败"
        )

    return {
        "message": "配置删除成功",
        "appName": app_name
    }


@router.get("/", response_model=dict, summary="获取所有AI配置", description="获取所有启用的AI配置")
async def list_ai_configs(
) -> dict:
    """获取所有启用的配置"""
    configs = get_all_configs()
    return {
        "total": len(configs),
        "configs": configs
    }