"""地磅公共只读：免登车牌 options（现场填写页）"""
from __future__ import annotations

from typing import Optional

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

from app.core.database import get_db
from app.models.db_models import DbInboundOutbound, DbPurchasePlan
from app.models.pl_models import PlVehicle

router = APIRouter(prefix="/public/db", tags=["地磅-公共车牌"])


def _resolve_tenant_no(
    db: Session,
    inventory_id: Optional[str],
    plan_id: Optional[str],
) -> str:
    if inventory_id:
        row = (
            db.query(DbInboundOutbound)
            .filter(DbInboundOutbound.id == inventory_id, DbInboundOutbound.del_flag == 0)
            .first()
        )
        if not row:
            raise HTTPException(status_code=404, detail="出入库单不存在")
        return row.tenant_no
    if plan_id:
        plan = (
            db.query(DbPurchasePlan)
            .filter(DbPurchasePlan.id == plan_id, DbPurchasePlan.del_flag == 0)
            .first()
        )
        if not plan:
            raise HTTPException(status_code=404, detail="计划不存在")
        return plan.tenant_no
    raise HTTPException(status_code=400, detail="需要提供 inventoryId 或 planId")


@router.get("/vehicle-plates")
def list_public_vehicle_plates(
    q: Optional[str] = Query(None),
    inventory_id: Optional[str] = Query(None, alias="inventoryId"),
    plan_id: Optional[str] = Query(None, alias="planId"),
    db: Session = Depends(get_db),
):
    """免登：按出入库/计划解析 tenant_no，返回 pl_vehicle 车牌（self + carrier）。"""
    tenant_no = _resolve_tenant_no(db, inventory_id, plan_id)
    query = db.query(PlVehicle).filter(
        PlVehicle.tenant_no == tenant_no,
        PlVehicle.del_flag == 0,
        PlVehicle.vehicle_type.in_(["self", "carrier"]),
    )
    kw = (q or "").strip()
    if kw:
        query = query.filter(PlVehicle.license_plate.contains(kw))
    rows = (
        query.order_by(PlVehicle.create_time.desc()).limit(100).all()
    )
    return [
        {"licensePlate": r.license_plate, "vehicleType": r.vehicle_type}
        for r in rows
        if r.license_plate
    ]