from __future__ import annotations

from typing import Annotated

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from app.api.deps import get_db
from app.schemas.common import ErrorResponse
from app.schemas.reimbursement import ReimbursementCreate, ReimbursementRead
from app.services.reimbursement import ReimbursementService

router = APIRouter()
DbSession = Annotated[Session, Depends(get_db)]


@router.get(
    "",
    response_model=list[ReimbursementRead],
    summary="查询报销申请列表",
    description="返回当前系统中的报销申请列表。",
)
def list_reimbursements(db: DbSession) -> list[ReimbursementRead]:
    return ReimbursementService(db).list_reimbursements()


@router.post(
    "",
    response_model=ReimbursementRead,
    status_code=status.HTTP_201_CREATED,
    summary="创建报销申请",
    description="创建一条新的报销申请记录，初始状态为 `draft`。",
)
def create_reimbursement(payload: ReimbursementCreate, db: DbSession) -> ReimbursementRead:
    return ReimbursementService(db).create_reimbursement(payload)


@router.get(
    "/{request_id}",
    response_model=ReimbursementRead,
    summary="读取报销申请详情",
    description="根据报销申请主键读取单据详情。",
    responses={
        status.HTTP_404_NOT_FOUND: {
            "model": ErrorResponse,
            "description": "报销申请不存在。",
        }
    },
)
def get_reimbursement(request_id: str, db: DbSession) -> ReimbursementRead:
    request = ReimbursementService(db).get_reimbursement(request_id)
    if request is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Request not found")
    return request