"""运输计划 - 三方粘贴识别批量提交"""
from __future__ import annotations

from typing import Optional

from fastapi import HTTPException
from sqlalchemy.orm import Session

from app.core.utils import generate_uuid
from app.models.pl_models import PlCarrier, PlPersonnel, PlVehicle
from app.schemas.pl.base_data import VehiclePersonnelRow
from app.schemas.pl.paste_recognize import (
    ConflictAction,
    PasteCommitBody,
    PasteCommitResult,
    PastePersonnelIn,
    PasteVehicleIn,
)
from app.services.pl_personnel_service import save_vehicle_personnel


def _conflict_map(conflicts: list[ConflictAction]) -> dict[str, ConflictAction]:
    result: dict[str, ConflictAction] = {}
    for item in conflicts:
        key = (item.key or "").strip()
        if not key:
            continue
        if key in result:
            raise HTTPException(status_code=400, detail=f"冲突项「{key}」重复")
        result[key] = item
    return result


def _find_personnel_by_id_card(
    db: Session, tenant_no: str, id_card_no: Optional[str]
) -> Optional[PlPersonnel]:
    card = (id_card_no or "").strip().upper()
    if not card:
        return None
    return (
        db.query(PlPersonnel)
        .filter(
            PlPersonnel.tenant_no == tenant_no,
            PlPersonnel.id_card_no == card,
            PlPersonnel.del_flag == 0,
        )
        .first()
    )


def _find_vehicle_by_plate(
    db: Session, tenant_no: str, license_plate: str
) -> Optional[PlVehicle]:
    plate = (license_plate or "").strip()
    if not plate:
        return None
    return (
        db.query(PlVehicle)
        .filter(
            PlVehicle.tenant_no == tenant_no,
            PlVehicle.license_plate == plate,
            PlVehicle.del_flag == 0,
        )
        .first()
    )


def _get_personnel(
    db: Session, tenant_no: str, personnel_id: str
) -> PlPersonnel:
    row = (
        db.query(PlPersonnel)
        .filter(
            PlPersonnel.id == personnel_id,
            PlPersonnel.tenant_no == tenant_no,
            PlPersonnel.del_flag == 0,
        )
        .first()
    )
    if not row:
        raise HTTPException(status_code=400, detail=f"人员不存在：{personnel_id}")
    return row


def _get_vehicle(db: Session, tenant_no: str, vehicle_id: str) -> PlVehicle:
    row = (
        db.query(PlVehicle)
        .filter(
            PlVehicle.id == vehicle_id,
            PlVehicle.tenant_no == tenant_no,
            PlVehicle.del_flag == 0,
        )
        .first()
    )
    if not row:
        raise HTTPException(status_code=400, detail=f"车辆不存在：{vehicle_id}")
    return row


def _resolve_personnel(
    db: Session,
    tenant_no: str,
    *,
    key: str,
    draft: PastePersonnelIn,
    conflict: Optional[ConflictAction],
    user_id: str,
    dept_id: str,
) -> str:
    name = (draft.personnel_name or "").strip()
    if not name:
        raise HTTPException(status_code=400, detail=f"{key}姓名不能为空")

    existing = _find_personnel_by_id_card(db, tenant_no, draft.id_card_no)
    if existing and conflict is None:
        raise HTTPException(
            status_code=400,
            detail=f"人员「{name}」身份证已存在，请先选择复用/覆盖/取消",
        )
    if conflict is not None:
        if conflict.action == "cancel":
            raise HTTPException(status_code=400, detail="已取消")
        target = _get_personnel(db, tenant_no, conflict.existing_id)
        if conflict.action == "reuse":
            return target.id
        # overwrite
        target.personnel_name = name
        target.phone_no = (draft.phone_no or "").strip() or None
        card = (draft.id_card_no or "").strip().upper() or None
        if card:
            target.id_card_no = card
        target.personnel_type = draft.personnel_type
        target.personnel_affiliation = "carrier"
        target.update_by = user_id
        return target.id

    personnel = PlPersonnel(
        id=generate_uuid(),
        tenant_no=tenant_no,
        personnel_name=name,
        phone_no=(draft.phone_no or "").strip() or None,
        id_card_no=(draft.id_card_no or "").strip().upper() or None,
        personnel_type=draft.personnel_type,
        personnel_affiliation="carrier",
        status="1",
        create_by=user_id,
        create_dept_id=dept_id,
    )
    db.add(personnel)
    db.flush()
    return personnel.id


def _resolve_vehicle(
    db: Session,
    tenant_no: str,
    *,
    draft: PasteVehicleIn,
    conflict: Optional[ConflictAction],
    user_id: str,
    dept_id: str,
) -> str:
    plate = (draft.license_plate or "").strip()
    if not plate:
        raise HTTPException(status_code=400, detail="车牌号不能为空")
    carrier_id = (draft.carrier_id or "").strip()
    if not carrier_id:
        raise HTTPException(status_code=400, detail="请选择承运商")

    carrier = (
        db.query(PlCarrier)
        .filter(
            PlCarrier.id == carrier_id,
            PlCarrier.tenant_no == tenant_no,
            PlCarrier.del_flag == 0,
        )
        .first()
    )
    if not carrier:
        raise HTTPException(status_code=400, detail="承运商不存在")

    carrier_name = (draft.carrier_name or "").strip() or carrier.carrier_name
    existing = _find_vehicle_by_plate(db, tenant_no, plate)
    if existing and conflict is None:
        raise HTTPException(
            status_code=400,
            detail=f"车牌「{plate}」已存在，请先选择复用/覆盖/取消",
        )
    if conflict is not None:
        if conflict.action == "cancel":
            raise HTTPException(status_code=400, detail="已取消")
        target = _get_vehicle(db, tenant_no, conflict.existing_id)
        if conflict.action == "reuse":
            return target.id
        target.trailer_no = (draft.trailer_no or "").strip() or None
        target.load_capacity = draft.load_capacity
        target.carrier_id = carrier_id
        target.carrier_name = carrier_name
        target.vehicle_type = "carrier"
        target.update_by = user_id
        return target.id

    vehicle = PlVehicle(
        id=generate_uuid(),
        tenant_no=tenant_no,
        vehicle_type="carrier",
        carrier_id=carrier_id,
        carrier_name=carrier_name,
        license_plate=plate,
        trailer_no=(draft.trailer_no or "").strip() or None,
        load_capacity=draft.load_capacity,
        vehicle_status="available",
        create_by=user_id,
        create_dept_id=dept_id,
    )
    db.add(vehicle)
    db.flush()
    return vehicle.id


def commit_paste_recognize(
    db: Session,
    tenant_no: str,
    body: PasteCommitBody,
    *,
    user_id: str,
    dept_id: str,
) -> PasteCommitResult:
    cmap = _conflict_map(body.conflicts or [])
    for item in cmap.values():
        if item.action == "cancel":
            raise HTTPException(status_code=400, detail="已取消")

    need_vehicle = body.mode == "vehicle_bundle" or (
        body.mode == "personnel_first" and body.create_vehicle
    )
    if need_vehicle and body.vehicle is None:
        raise HTTPException(status_code=400, detail="缺少车辆信息")

    driver_id: Optional[str] = None
    escort_id: Optional[str] = None
    vehicle_id: Optional[str] = None

    if body.driver is not None:
        driver_id = _resolve_personnel(
            db,
            tenant_no,
            key="驾驶员",
            draft=body.driver,
            conflict=cmap.get("driver"),
            user_id=user_id,
            dept_id=dept_id,
        )
    if body.escort is not None:
        escort_id = _resolve_personnel(
            db,
            tenant_no,
            key="押运员",
            draft=body.escort,
            conflict=cmap.get("escort"),
            user_id=user_id,
            dept_id=dept_id,
        )

    if need_vehicle and body.vehicle is not None:
        vehicle_id = _resolve_vehicle(
            db,
            tenant_no,
            draft=body.vehicle,
            conflict=cmap.get("vehicle"),
            user_id=user_id,
            dept_id=dept_id,
        )
        rows: list[VehiclePersonnelRow] = []
        if driver_id and body.driver is not None:
            rows.append(
                VehiclePersonnelRow(
                    personnelId=driver_id,
                    personnelName=body.driver.personnel_name.strip(),
                    phoneNo=(body.driver.phone_no or "").strip() or None,
                    role="driver",
                    isDefault=1,
                )
            )
        if escort_id and body.escort is not None:
            rows.append(
                VehiclePersonnelRow(
                    personnelId=escort_id,
                    personnelName=body.escort.personnel_name.strip(),
                    phoneNo=(body.escort.phone_no or "").strip() or None,
                    role="escort",
                    isDefault=0,
                )
            )
        if rows:
            save_vehicle_personnel(
                db,
                vehicle_id,
                rows,
                tenant_no,
                user_id=user_id,
                dept_id=dept_id,
                vehicle_type="carrier",
            )

    if body.mode == "personnel_first" and not need_vehicle:
        if not driver_id and not escort_id:
            raise HTTPException(status_code=400, detail="请至少识别一名人员")

    if body.mode == "vehicle_bundle" and not vehicle_id:
        raise HTTPException(status_code=400, detail="车辆创建失败")

    return PasteCommitResult(
        vehicleId=vehicle_id,
        driverId=driver_id,
        escortId=escort_id,
    )