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

from app.database import get_db
from app.deps import current_user, require_roles
from app.models import (
    AttendancePoint,
    DeviceQRCode,
    Equipment,
    NoticePoint,
    PersonAttendancePoint,
    Personnel,
    Product,
    ProductionReport,
    ProductionReportItem,
    ReconciliationLedgerEntry,
    Role,
    WorkSession,
    WorkSessionDevice,
)
from app.schemas import AttendancePointCreate, AttendancePointOut, PageResponse
from app.services.attendance_points import accessible_points, clean_point_name, ensure_default_attendance_point
from app.services.common import paginate
from app.services.misc_work import ensure_misc_work_product
from app.services.serializers import attendance_point_out
from app.services.work_schedule import normalize_schedule_payload

router = APIRouter(prefix="/api/attendance-points", tags=["attendance-points"])


def _validate_payload(payload: AttendancePointCreate) -> str:
    name = clean_point_name(payload.name)
    if not name:
        raise HTTPException(status_code=400, detail="请输入考勤点名称")
    if (payload.latitude is None) != (payload.longitude is None):
        raise HTTPException(status_code=400, detail="经纬度必须同时填写")
    if payload.latitude is not None and not (-90 <= payload.latitude <= 90):
        raise HTTPException(status_code=400, detail="纬度范围为-90到90")
    if payload.longitude is not None and not (-180 <= payload.longitude <= 180):
        raise HTTPException(status_code=400, detail="经度范围为-180到180")
    if int(payload.radius_meters or 0) <= 0:
        raise HTTPException(status_code=400, detail="考勤范围半径必须大于0米")
    try:
        normalize_schedule_payload(payload)
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=f"{name} {exc}") from exc
    return name


def _rename_business_point(db: Session, old_name: str, new_name: str) -> None:
    if old_name == new_name:
        return
    for model in (
        PersonAttendancePoint,
        Product,
        Equipment,
        WorkSession,
        WorkSessionDevice,
        ProductionReport,
        ProductionReportItem,
        DeviceQRCode,
        NoticePoint,
        ReconciliationLedgerEntry,
    ):
        db.query(model).filter(model.attendance_point_name == old_name).update(
            {model.attendance_point_name: new_name},
            synchronize_session=False,
        )


@router.get("/accessible", response_model=list[AttendancePointOut])
def list_accessible_attendance_points(
    user: Personnel = Depends(current_user),
    db: Session = Depends(get_db),
) -> list[AttendancePointOut]:
    return [attendance_point_out(point) for point in accessible_points(db, user)]


@router.get("/public", response_model=list[AttendancePointOut])
def list_public_attendance_points(
    db: Session = Depends(get_db),
) -> list[AttendancePointOut]:
    points = db.scalars(
        select(AttendancePoint)
        .where(AttendancePoint.is_active.is_(True))
        .order_by(AttendancePoint.name.asc())
    ).all()
    rows = []
    for point in points:
        item = attendance_point_out(point)
        item.remark = None
        item.created_at = None
        item.updated_at = None
        rows.append(item)
    return rows


@router.get("", response_model=PageResponse)
def list_attendance_points(
    keyword: str = "",
    page: int = Query(1, ge=1),
    page_size: int = Query(100, ge=1, le=500),
    _: Personnel = Depends(require_roles(Role.manager)),
    db: Session = Depends(get_db),
) -> PageResponse:
    default_point = ensure_default_attendance_point(db)
    ensure_misc_work_product(db, default_point.name)
    db.commit()
    query = select(AttendancePoint).order_by(AttendancePoint.updated_at.desc(), AttendancePoint.name.asc())
    if keyword:
        like = f"%{keyword}%"
        query = query.where(or_(AttendancePoint.name.like(like), AttendancePoint.remark.like(like)))
    result = paginate(db, query, page, page_size)
    return PageResponse(**{**result, "rows": [attendance_point_out(row) for row in result["rows"]]})


@router.post("", response_model=AttendancePointOut)
def save_attendance_point(
    payload: AttendancePointCreate,
    _: Personnel = Depends(require_roles(Role.manager)),
    db: Session = Depends(get_db),
) -> AttendancePointOut:
    name = _validate_payload(payload)
    original_name = clean_point_name(payload.original_name) or name
    point = db.get(AttendancePoint, original_name)
    if point is not None and original_name != name:
        if db.get(AttendancePoint, name) is not None:
            raise HTTPException(status_code=409, detail="该考勤点名称已存在")
        next_point = AttendancePoint(name=name)
        db.add(next_point)
        db.flush()
        _rename_business_point(db, original_name, name)
        db.delete(point)
        point = next_point
    elif point is None:
        point = db.get(AttendancePoint, name)
    if point is None:
        point = AttendancePoint(name=name)
        db.add(point)
        db.flush()
    point.latitude = payload.latitude
    point.longitude = payload.longitude
    point.radius_meters = int(payload.radius_meters or 500)
    for field, value in normalize_schedule_payload(payload).items():
        setattr(point, field, value)
    point.remark = payload.remark
    point.is_active = bool(payload.is_active)
    ensure_misc_work_product(db, name)
    db.commit()
    db.refresh(point)
    return attendance_point_out(point)


@router.delete("/{name}", status_code=204)
def delete_attendance_point(
    name: str,
    _: Personnel = Depends(require_roles(Role.manager)),
    db: Session = Depends(get_db),
) -> None:
    point_name = clean_point_name(name)
    point = db.get(AttendancePoint, point_name)
    if point is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="考勤点不存在")
    if point_name == ensure_default_attendance_point(db).name:
        raise HTTPException(status_code=400, detail="默认考勤点不能删除")
    point.is_active = False
    db.commit()