import uuid

from fastapi import APIRouter, Depends, HTTPException, Query, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.base import PaginationParams, PaginatedResponse
from app.api.deps import get_current_user
from app.database import get_db
from app.models.user import User
from app.schemas.citation import RunNowResponse
from app.schemas.query import QueryCreate, QueryListResponse, QueryResponse, QueryUpdate
from app.services.citation import trigger_query_now
from app.services.query import create_query, delete_query, get_queries, get_query, update_query

router = APIRouter()


@router.get("/", response_model=QueryListResponse)
async def list_queries(
    pagination: PaginationParams = Depends(PaginationParams),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    items, total = await get_queries(
        db, current_user.id,
        skip=pagination.offset,
        limit=pagination.limit,
    )
    return {"items": items, "total": total}


@router.post("/", response_model=QueryResponse, status_code=status.HTTP_201_CREATED)
async def create_new_query(
    query_data: QueryCreate,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    try:
        query = await create_query(db, current_user.id, query_data)
    except PermissionError as e:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail=str(e) if str(e) else "查询词数量已达上限",
        )
    return query


@router.get("/{query_id}", response_model=QueryResponse)
async def retrieve_query(
    query_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    query = await get_query(db, query_id, current_user.id)
    if query is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="查询词不存在",
        )
    return query


@router.put("/{query_id}", response_model=QueryResponse)
async def modify_query(
    query_id: uuid.UUID,
    update_data: QueryUpdate,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    query = await update_query(db, query_id, current_user.id, update_data)
    if query is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="查询词不存在",
        )
    return query


@router.delete("/{query_id}", status_code=status.HTTP_204_NO_CONTENT)
async def remove_query(
    query_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    deleted = await delete_query(db, query_id, current_user.id)
    if not deleted:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="查询词不存在",
        )
    return None


@router.post("/{query_id}/run-now", response_model=RunNowResponse, status_code=status.HTTP_202_ACCEPTED)
async def run_query_now(
    query_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    try:
        task = await trigger_query_now(db, current_user.id, query_id)
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=str(e),
        )

    return {
        "task_id": task.id,
        "status": task.status,
        "message": "查询任务已加入队列",
    }