import asyncio
import json
import os
import tempfile
from urllib.parse import urlencode

from fastapi import APIRouter, Depends, File, Form, HTTPException, Query, Request, UploadFile
import httpx
import config_env
from typing import Any, Dict, List, Optional

from schemas.reslevis import (
    BuildingItem,
    FloorItem,
    ZoneItem,
    ZoneAreaDefinitionItem,
    GatewayItem,
    TrackerItem,
    OperatorItem,
    SubjectItem,
    AlarmItem,
    AlarmCoreItem,
    AlarmStatusUpdateItem,
    TrackItem,
    TrackHistoryItem,
    TrackerZoneItem,
    SettingItem,
    GuiConfigItem,
    UserPreferencesItem,
    UserPreferencesUpdateItem,
    FloorMapUploadResponseItem,
    CoreSettingsItem,
    CoreSettingsUpdateItem,
)

from logica_reslevis.gateway import GatewayJsonRepository
from logica_reslevis.building import BuildingJsonRepository
from logica_reslevis.floor import FloorJsonRepository
from logica_reslevis.zone import ZoneJsonRepository
from logica_reslevis.zone_area_definition import ZoneAreaDefinitionJsonRepository
from logica_reslevis.tracker import TrackerJsonRepository
from logica_reslevis.operator import OperatorJsonRepository
from logica_reslevis.setting import SettingJsonRepository
from logica_reslevis.gui_config import GuiConfigJsonRepository
from logica_reslevis.user_preferences import UserPreferencesJsonRepository
from logica_reslevis.subject import SubjectJsonRepository
from logica_reslevis.alarm import AlarmJsonRepository
from logica_reslevis.track import TrackJsonRepository
from logica_reslevis.tracker_zone import TrackerZoneJsonRepository
from logica_reslevis.tracker_mode import get_mode_aware_trackers

from security import get_current_user

#CORE SYNC
CORE_BASE_URL = config_env.CORE_API_URL.rstrip("/")
ALERTS_CORE_BASE_URL = "http://localhost:1902"
TRACKS_CORE_BASE_URL = "http://localhost:1902"
SETTINGS_CORE_BASE_URL = "http://127.0.0.1:1902"
CORE_TIMEOUT = 2.0  # secondi
PNG_SIGNATURE = b"\x89PNG\r\n\x1a\n"

async def sync_core_get(request: Request) -> None:
    if request.method != "GET":
        return

    sync = CORE_GET_SYNC.get(request.url.path)
    if sync is None:
        return
    repo, normalizer = sync

    try:
        async with httpx.AsyncClient(timeout=CORE_TIMEOUT) as client:
            resp = await client.get(
                f"{CORE_BASE_URL}{request.url.path}",
                params=request.query_params,
            )

        if 200 <= resp.status_code < 300:
            data = resp.json()
            if isinstance(data, list):
                if normalizer:
                    data = [normalizer(r) for r in data if isinstance(r, dict)]
                repo._write_all(data)  # aggiorna i file locali
    except (httpx.RequestError, ValueError):
        # CORE giù o risposta non valida -> uso il file locale
        pass


router = APIRouter(dependencies=[Depends(sync_core_get)])

gateway_repo = GatewayJsonRepository()
building_repo = BuildingJsonRepository()
floor_repo = FloorJsonRepository()
zone_repo = ZoneJsonRepository()
zone_area_definition_repo = ZoneAreaDefinitionJsonRepository()
tracker_repo = TrackerJsonRepository()
operator_repo = OperatorJsonRepository()
subject_repo = SubjectJsonRepository()
alarm_repo = AlarmJsonRepository()
track_repo = TrackJsonRepository()
tracker_zone_repo = TrackerZoneJsonRepository()
setting_repo = SettingJsonRepository()
gui_config_repo = GuiConfigJsonRepository()
user_preferences_repo = UserPreferencesJsonRepository()

def _none_if_empty(v):
    return None if v in ("", None, 0, "0") else v

def _str_or_none(v):
    if v in ("", None):
        return None
    if isinstance(v, (int, float, bool)):
        return str(v)
    return v

def _uuid_list(values):
    if values in ("", None):
        return []
    if isinstance(values, str):
        values = [v for v in values.split(",") if v]
    if isinstance(values, (list, tuple, set)):
        cleaned = []
        for v in values:
            if isinstance(v, dict):
                v = v.get("id") or v.get("uuid")
            if v in ("", None, 0, "0"):
                continue
            cleaned.append(v)
        return cleaned
    return [values] if values not in ("", None, 0, "0") else []

def _normalize_gateway(row: dict) -> dict:
    row = dict(row)
    row["floor"] = _none_if_empty(row.get("floor"))
    row["building"] = _none_if_empty(row.get("building"))
    return row

def _normalize_track(row: dict) -> dict:
    row = dict(row)
    row["ID"] = row.get("ID")
    row["gateway"] = _none_if_empty(row.get("gateway"))
    row["tracker"] = _none_if_empty(row.get("tracker"))
    row["subject"] = _none_if_empty(row.get("subject"))
    row["floor"] = _none_if_empty(row.get("floor"))
    row["building"] = _none_if_empty(row.get("building"))
    row["timestamp"] = _str_or_none(row.get("timestamp"))
    row["type"] = _str_or_none(row.get("type"))
    row["status"] = _str_or_none(row.get("status"))
    row["gatewayMac"] = _str_or_none(row.get("gatewayMac"))
    row["trackerMac"] = _str_or_none(row.get("trackerMac"))
    row["subjectName"] = _str_or_none(row.get("subjectName"))
    row["x"] = None if row.get("x") in ("", None) else row.get("x")
    row["y"] = None if row.get("y") in ("", None) else row.get("y")
    row["z"] = None if row.get("z") in ("", None) else row.get("z")
    # signal resta float o None
    row["signal"] = None if row.get("signal") in ("", None) else row.get("signal")
    return row

def _normalize_zone(row: dict) -> dict:
    row = dict(row)
    row["floor"] = _none_if_empty(row.get("floor"))
    row["building"] = _none_if_empty(row.get("building"))
    row["groups"] = _uuid_list(row.get("groups"))
    return row


def _uid_from_claims(claims: dict) -> str:
    uid = (
        claims.get("preferred_username")
        or claims.get("username")
        or claims.get("email")
        or claims.get("sub")
    )
    if not uid:
        raise HTTPException(status_code=401, detail="User identity not found in token")
    return str(uid)


def _floor_maps_index_path() -> str:
    return os.path.join(config_env.RESLEVIS_MAPS_DIR, "maps.json")


def _read_floor_maps_index() -> Dict[str, Any]:
    path = _floor_maps_index_path()
    if not os.path.isfile(path):
        return {"items": [], "count": 0}

    try:
        with open(path, "r", encoding="utf-8") as fp:
            data = json.load(fp)
    except (OSError, ValueError):
        return {"items": [], "count": 0}

    if not isinstance(data, dict):
        return {"items": [], "count": 0}

    items = data.get("items")
    if not isinstance(items, list):
        items = []
    return {"items": items, "count": len(items)}


def _write_floor_maps_index(index: Dict[str, Any]) -> None:
    maps_dir = config_env.RESLEVIS_MAPS_DIR
    os.makedirs(maps_dir, exist_ok=True)

    index["count"] = len(index.get("items") or [])
    payload = json.dumps(index, ensure_ascii=False, indent=2)

    temp_name = None
    try:
        with tempfile.NamedTemporaryFile("w", dir=maps_dir, delete=False, encoding="utf-8") as tmp:
            tmp.write(payload)
            tmp.flush()
            os.fsync(tmp.fileno())
            temp_name = tmp.name

        os.replace(temp_name, _floor_maps_index_path())
        try:
            os.chmod(_floor_maps_index_path(), 0o664)
        except OSError:
            pass
    except OSError as exc:
        if temp_name and os.path.exists(temp_name):
            try:
                os.remove(temp_name)
            except OSError:
                pass
        raise HTTPException(status_code=500, detail="Unable to update maps.json") from exc


def _same_floor(row: Dict[str, Any], floor: int) -> bool:
    try:
        return int(row.get("floor")) == floor
    except (TypeError, ValueError):
        return False


def _floor_sort_key(row: Dict[str, Any]) -> int:
    try:
        return int(row.get("floor"))
    except (TypeError, ValueError):
        return 0


def _upsert_floor_map_record(floor: int, name: str, metadata: Dict[str, Any]) -> None:
    index = _read_floor_maps_index()
    item = {
        "floor": floor,
        "name": name,
        "mime_type": "image/png",
        "metadata": metadata,
    }

    items = [r for r in index["items"] if isinstance(r, dict) and not _same_floor(r, floor)]
    items.append(item)
    items.sort(key=_floor_sort_key)
    index["items"] = items
    _write_floor_maps_index(index)


def _public_map_path(name: str) -> str:
    public_path = config_env.RESLEVIS_MAPS_PUBLIC_PATH
    return f"{public_path}/{name}" if public_path else name


def _validate_map_target(maps_dir: str, name: str) -> str:
    maps_dir_abs = os.path.abspath(maps_dir)
    target_path = os.path.abspath(os.path.join(maps_dir_abs, name))
    if os.path.commonpath([maps_dir_abs, target_path]) != maps_dir_abs:
        raise HTTPException(status_code=400, detail="Invalid map filename")
    return target_path


async def _write_upload_file(upload: UploadFile, target_path: str) -> None:
    maps_dir = os.path.dirname(target_path)
    temp_name = None
    try:
        with tempfile.NamedTemporaryFile("wb", dir=maps_dir, delete=False) as tmp:
            temp_name = tmp.name
            while True:
                chunk = await upload.read(1024 * 1024)
                if not chunk:
                    break
                tmp.write(chunk)
            tmp.flush()
            os.fsync(tmp.fileno())

        os.replace(temp_name, target_path)
        try:
            os.chmod(target_path, 0o664)
        except OSError:
            pass
    except OSError as exc:
        if temp_name and os.path.exists(temp_name):
            try:
                os.remove(temp_name)
            except OSError:
                pass
        raise HTTPException(status_code=500, detail="Unable to save floor map") from exc

CORE_GET_SYNC = {
    "/reslevis/getGateways": (gateway_repo, _normalize_gateway),
    "/reslevis/getZones": (zone_repo, _normalize_zone),
}


async def _fetch_tracks_for_tracker(
    tracker_id: str,
    params: Optional[dict] = None,
) -> List[dict]:
    query_string = urlencode(params or {})
    url = f"{TRACKS_CORE_BASE_URL}/reslevis/getTracks/{tracker_id}"
    if query_string:
        url = f"{url}?{query_string}"

    process = await asyncio.create_subprocess_exec(
        "curl",
        "-sS",
        "-X",
        "GET",
        url,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.PIPE,
    )
    stdout, stderr = await process.communicate()

    if process.returncode != 0:
        detail = (stderr or stdout).decode("utf-8", errors="replace").strip() or "CORE curl request failed"
        raise HTTPException(status_code=502, detail=detail)

    try:
        payload = json.loads(stdout.decode("utf-8"))
    except ValueError as exc:
        raise HTTPException(status_code=502, detail="Invalid CORE response") from exc

    if not isinstance(payload, list):
        raise HTTPException(status_code=502, detail="Unexpected CORE response type")

    return [_normalize_track(row) for row in payload if isinstance(row, dict)]


@router.get(
    "/getGateways",
    response_model=List[GatewayItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getGateways():
    return gateway_repo.list()


@router.post("/postGateway", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postGateway(item: GatewayItem):
    gateway_repo.add(item)
    return {"message": "OK"}


@router.put("/updateGateway", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateGateway(item: GatewayItem):
    gateway_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeGateway/{gateway_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeGateway(gateway_id: str):
    gateway_repo.remove(gateway_id)
    return {"message": "OK"}


@router.get(
    "/getBuildings",
    response_model=List[BuildingItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getBuildings():
    return building_repo.list()


@router.post("/postBuilding", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postBuilding(item: BuildingItem):
    building_repo.add(item)
    return {"message": "OK"}


@router.put("/updateBuilding", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateBuilding(item: BuildingItem):
    building_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeBuilding/{building_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeBuilding(building_id: str):
    building_repo.remove(building_id)
    return {"message": "OK"}


@router.get(
    "/getFloors",
    response_model=List[FloorItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)

def getFloors():
    return floor_repo.list()

@router.post("/postFloor", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postFloor(item: FloorItem):
    floor_repo.add(item)
    return {"message": "OK"}


@router.put("/updateFloor", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateFloor(item: FloorItem):
    floor_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeFloor/{floor_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeFloor(floor_id: str):
    floor_repo.remove(floor_id)
    return {"message": "OK"}


@router.get(
    "/getZones",
    response_model=List[ZoneItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getZones():
    return zone_repo.list()


@router.post("/postZone", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postZone(item: ZoneItem):
    zone_repo.add(item)
    return {"message": "OK"}


@router.put("/updateZone", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateZone(item: ZoneItem):
    zone_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeZone/{zone_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeZone(zone_id: str):
    zone_repo.remove(zone_id)
    return {"message": "OK"}


@router.get(
    "/getZoneAreaDefinitions",
    response_model=List[ZoneAreaDefinitionItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getZoneAreaDefinitions(UUID: str | None = None):
    return zone_area_definition_repo.list(UUID)


@router.post("/postZoneAreaDefinition", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postZoneAreaDefinition(item: ZoneAreaDefinitionItem):
    zone_area_definition_repo.add(item)
    return {"message": "OK"}


@router.put("/updateZoneAreaDefinition", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateZoneAreaDefinition(item: ZoneAreaDefinitionItem):
    zone_area_definition_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeZoneAreaDefinition/{zone_area_definition_uuid}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeZoneAreaDefinition(zone_area_definition_uuid: str):
    zone_area_definition_repo.remove(zone_area_definition_uuid)
    return {"message": "OK"}


@router.get(
    "/getTrackers",
    response_model=List[TrackerItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def getTrackers():
    return await get_mode_aware_trackers(
        tracker_repo,
        SETTINGS_CORE_BASE_URL,
        config_env.BLE_AI_INFER_CSV,
        CORE_TIMEOUT,
    )


@router.post("/postTracker", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postTracker(item: TrackerItem):
    tracker_repo.add(item)
    return {"message": "OK"}


@router.put("/updateTracker", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateTracker(item: TrackerItem):
    tracker_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeTracker/{tracker_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeTracker(tracker_id: str):
    tracker_repo.remove(tracker_id)
    return {"message": "OK"}


@router.get(
    "/getTrackerZones",
    response_model=List[TrackerZoneItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getTrackerZones():
    return tracker_zone_repo.list()


@router.post("/postTrackerZone", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postTrackerZone(item: TrackerZoneItem):
    tracker_zone_repo.add(item)
    return {"message": "OK"}


@router.put("/updateTrackerZone", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateTrackerZone(item: TrackerZoneItem):
    tracker_zone_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeTrackerZone/{tracker_zone_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeTrackerZone(tracker_zone_id: str):
    tracker_zone_repo.remove(tracker_zone_id)
    return {"message": "OK"}

@router.get(
    "/getTracks",
    response_model=List[TrackHistoryItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def getTracks(
    tracker_id: str = Query(..., alias="id"),
    limit: Optional[int] = Query(None, ge=1),
    from_: Optional[str] = Query(None, alias="from"),
    to: Optional[str] = Query(None),
):
    params = {}
    if limit is not None:
        params["limit"] = limit
    if from_:
        params["from"] = from_
    if to:
        params["to"] = to

    return await _fetch_tracks_for_tracker(tracker_id, params)


@router.get(
    "/getTracks/{tracker_id}",
    response_model=List[TrackHistoryItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def getTrack(
    tracker_id: str,
    limit: Optional[int] = Query(None, ge=1),
    from_: Optional[str] = Query(None, alias="from"),
    to: Optional[str] = Query(None),
):
    params = {}
    if limit is not None:
        params["limit"] = limit
    if from_:
        params["from"] = from_
    if to:
        params["to"] = to

    return await _fetch_tracks_for_tracker(tracker_id, params)


@router.post("/postTrack", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postTrack(item: TrackItem):
    track_repo.add(item)
    return {"message": "OK"}


@router.put("/updateTrack", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateTrack(item: TrackItem):
    track_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeTrack/{track_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeTrack(track_id: str):
    track_repo.remove(track_id)
    return {"message": "OK"}


@router.get(
    "/getAlarms",
    response_model=List[AlarmCoreItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def getAlarms():
    async with httpx.AsyncClient(timeout=CORE_TIMEOUT) as client:
        resp = await client.get(f"{ALERTS_CORE_BASE_URL}/reslevis/alerts")

    if resp.status_code >= 400:
        detail = resp.text.strip() or "CORE alerts request failed"
        raise HTTPException(status_code=resp.status_code, detail=detail)

    try:
        payload = resp.json()
    except ValueError as exc:
        raise HTTPException(status_code=502, detail="Invalid CORE response") from exc

    if not isinstance(payload, list):
        raise HTTPException(status_code=502, detail="Unexpected CORE response type")

    return payload


@router.put(
    "/updateAlarm",
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def updateAlarm(item: AlarmStatusUpdateItem):
    async with httpx.AsyncClient(timeout=CORE_TIMEOUT) as client:
        resp = await client.patch(
            f"{ALERTS_CORE_BASE_URL}/reslevis/alerts/{item.id}",
            json={"status": item.status},
        )

    if resp.status_code >= 400:
        detail = resp.text.strip() or "CORE alert update failed"
        raise HTTPException(status_code=resp.status_code, detail=detail)

    if not resp.content:
        return {"message": "OK"}

    try:
        return resp.json()
    except ValueError:
        return {"message": "OK"}


@router.get(
    "/getOperators",
    response_model=List[OperatorItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getOperators():
    return operator_repo.list()


@router.post("/postOperator", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postOperator(item: OperatorItem):
    operator_repo.add(item)
    return {"message": "OK"}


@router.put("/updateOperator", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateOperator(item: OperatorItem):
    operator_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeOperator/{operator_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeOperator(operator_id: str):
    operator_repo.remove(operator_id)
    return {"message": "OK"}


@router.get(
    "/getSubjects",
    response_model=List[SubjectItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getSubjects():
    return subject_repo.list()


@router.post("/postSubject", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postSubject(item: SubjectItem):
    subject_repo.add(item)
    return {"message": "OK"}


@router.put("/updateSubject", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateSubject(item: SubjectItem):
    subject_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeSubject/{subject_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeSubject(subject_id: str):
    subject_repo.remove(subject_id)
    return {"message": "OK"}


@router.get(
    "/getSettings",
    response_model=List[SettingItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getSettings():
    return setting_repo.list()


@router.post("/postSetting", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postSetting(item: SettingItem):
    setting_repo.add(item)
    return {"message": "OK"}


@router.put("/updateSetting", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateSetting(item: SettingItem):
    setting_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeSetting/{setting_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeSetting(setting_id: str):
    setting_repo.remove(setting_id)
    return {"message": "OK"}


@router.get(
    "/getGuiConfigs",
    response_model=List[GuiConfigItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getGuiConfigs():
    return gui_config_repo.list()


@router.get(
    "/getUserPreferences",
    response_model=UserPreferencesItem,
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getUserPreferences(current_user: dict = Depends(get_current_user)):
    uid = _uid_from_claims(current_user)
    return user_preferences_repo.get(uid)


@router.put(
    "/updateUserPreferences",
    response_model=UserPreferencesItem,
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def updateUserPreferences(
    item: UserPreferencesUpdateItem,
    current_user: dict = Depends(get_current_user),
):
    uid = _uid_from_claims(current_user)
    return user_preferences_repo.update(uid, item)


@router.post(
    "/uploadFloorMap",
    response_model=FloorMapUploadResponseItem,
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def uploadFloorMap(
    floor: int = Form(...),
    file: UploadFile = File(...),
    pixel_ratio: float = Form(1),
    calibrated: bool = Form(False),
    origin_x: int = Form(0),
    origin_y: int = Form(0),
    grid_size: int = Form(50),
):
    if pixel_ratio <= 0:
        raise HTTPException(status_code=400, detail="pixel_ratio must be greater than 0")
    if grid_size <= 0:
        raise HTTPException(status_code=400, detail="grid_size must be greater than 0")

    content_type = (file.content_type or "").split(";")[0].strip().lower()
    if content_type and content_type != "image/png":
        raise HTTPException(status_code=400, detail="Only PNG files are allowed")

    signature = await file.read(len(PNG_SIGNATURE))
    if signature != PNG_SIGNATURE:
        raise HTTPException(status_code=400, detail="Only PNG files are allowed")
    await file.seek(0)

    maps_dir = config_env.RESLEVIS_MAPS_DIR
    os.makedirs(maps_dir, exist_ok=True)

    name = f"floor_{floor}.png"
    target_path = _validate_map_target(maps_dir, name)
    await _write_upload_file(file, target_path)

    metadata = {
        "pixel_ratio": pixel_ratio,
        "calibrated": calibrated,
        "origin": [origin_x, origin_y],
        "grid_size": grid_size,
    }
    _upsert_floor_map_record(floor, name, metadata)

    return {
        "floor": floor,
        "name": name,
        "path": _public_map_path(name),
        "mime_type": "image/png",
        "metadata": metadata,
    }


@router.post("/postGuiConfig", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def postGuiConfig(item: GuiConfigItem):
    gui_config_repo.add(item)
    return {"message": "OK"}


@router.put("/updateGuiConfig", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def updateGuiConfig(item: GuiConfigItem):
    gui_config_repo.update(item)
    return {"message": "OK"}


@router.delete("/removeGuiConfig/{gui_config_id}", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
def removeGuiConfig(gui_config_id: str):
    gui_config_repo.remove(gui_config_id)
    return {"message": "OK"}


@router.get(
    "/getCoreSettings",
    response_model=List[CoreSettingsItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def getCoreSettings():
    async with httpx.AsyncClient(timeout=CORE_TIMEOUT) as client:
        resp = await client.get(f"{SETTINGS_CORE_BASE_URL}/reslevis/settings")

    if resp.status_code >= 400:
        detail = resp.text.strip() or "CORE settings request failed"
        raise HTTPException(status_code=resp.status_code, detail=detail)

    try:
        payload = resp.json()
    except ValueError as exc:
        raise HTTPException(status_code=502, detail="Invalid CORE response") from exc

    if not isinstance(payload, list):
        raise HTTPException(status_code=502, detail="Unexpected CORE response type")

    return payload


@router.put(
    "/updateCoreSettings",
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
async def updateCoreSettings(item: CoreSettingsUpdateItem):
    async with httpx.AsyncClient(timeout=CORE_TIMEOUT) as client:
        resp = await client.patch(
            f"{SETTINGS_CORE_BASE_URL}/reslevis/settings",
            json=item.model_dump(exclude_none=True),
        )

    if resp.status_code >= 400:
        detail = resp.text.strip() or "CORE settings update failed"
        raise HTTPException(status_code=resp.status_code, detail=detail)

    if not resp.content:
        return {"message": "OK"}

    try:
        return resp.json()
    except ValueError:
        return {"message": "OK"}