import asyncio
from fastapi import APIRouter, Depends, HTTPException, Query, Request
import httpx
import config_env
from typing import List, Optional

from schemas.reslevis import (
    BuildingItem,
    FloorItem,
    ZoneItem,
    GatewayItem,
    TrackerItem,
    OperatorItem,
    SubjectItem,
    AlarmItem,
    TrackItem,
    TrackHistoryItem,
    TrackerZoneItem,
    SettingItem,
)

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.tracker import TrackerJsonRepository
from logica_reslevis.operator import OperatorJsonRepository
from logica_reslevis.setting import SettingJsonRepository
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 security import get_current_user

#CORE SYNC
CORE_BASE_URL = config_env.CORE_API_URL.rstrip("/")
CORE_TIMEOUT = 2.0  # secondi

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()
tracker_repo = TrackerJsonRepository()
operator_repo = OperatorJsonRepository()
subject_repo = SubjectJsonRepository()
alarm_repo = AlarmJsonRepository()
track_repo = TrackJsonRepository()
tracker_zone_repo = TrackerZoneJsonRepository()
setting_repo = SettingJsonRepository()

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_tracker(row: dict) -> dict:
    row = dict(row)
    row["floor"] = _none_if_empty(row.get("floor"))
    row["building"] = _none_if_empty(row.get("building"))
    row["battery"] = _str_or_none(row.get("battery"))
    row["temperature"] = _str_or_none(row.get("temperature"))
    row["acceleration"] = _str_or_none(row.get("acceleration"))
    row["heartRate"] = _str_or_none(row.get("heartRate"))
    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

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


async def _core_get_json(
    client: httpx.AsyncClient,
    path: str,
    params: Optional[dict] = None,
):
    resp = await client.get(f"{CORE_BASE_URL}{path}", params=params)
    if resp.status_code >= 400:
        detail = resp.text.strip() or "CORE request failed"
        raise HTTPException(status_code=resp.status_code, detail=detail)
    try:
        return resp.json()
    except ValueError as exc:
        raise HTTPException(status_code=502, detail="Invalid CORE response") from exc


async def _fetch_tracks_for_tracker(
    client: httpx.AsyncClient,
    tracker_id: str,
    params: Optional[dict] = None,
) -> List[dict]:
    query_params = dict(params or {})
    query_params["id"] = tracker_id

    try:
        payload = await _core_get_json(client, "/reslevis/getTracks", params=query_params)
        if not isinstance(payload, list):
            raise HTTPException(status_code=502, detail="Unexpected CORE response type")
        direct_rows = [_normalize_track(row) for row in payload if isinstance(row, dict)]
        if direct_rows:
            return direct_rows
    except HTTPException as exc:
        if exc.status_code != 404:
            raise

    payload = await _core_get_json(client, f"/reslevis/getTracks/{tracker_id}", params=params)
    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)]


def _sort_tracks_desc(rows: List[dict]) -> List[dict]:
    return sorted(rows, key=lambda row: row.get("timestamp") or "", reverse=True)


async def _fetch_all_tracks(params: dict) -> List[dict]:
    async with httpx.AsyncClient(timeout=30.0, verify=False) as client:
        try:
            payload = await _core_get_json(client, "/reslevis/getTracks", params=params)
            if not isinstance(payload, list):
                raise HTTPException(status_code=502, detail="Unexpected CORE response type")
            direct_rows = [_normalize_track(row) for row in payload if isinstance(row, dict)]
            if direct_rows:
                return direct_rows
        except HTTPException as exc:
            if exc.status_code != 404:
                raise

        trackers_payload = await _core_get_json(client, "/reslevis/getTrackers")
        if not isinstance(trackers_payload, list):
            raise HTTPException(status_code=502, detail="Unexpected CORE tracker response type")

        tracker_ids = []
        for item in trackers_payload:
            if not isinstance(item, dict):
                continue
            tracker_id = item.get("id")
            if tracker_id:
                tracker_ids.append(str(tracker_id))

        batches = await asyncio.gather(
            *[_fetch_tracks_for_tracker(client, tracker_id, params) for tracker_id in tracker_ids]
        )

    merged = [row for batch in batches for row in batch]
    merged = _sort_tracks_desc(merged)

    limit = params.get("limit")
    if isinstance(limit, int):
        return merged[:limit]
    return merged


@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(
    "/getTrackers",
    response_model=List[TrackerItem],
    tags=["Reslevis"],
    dependencies=[Depends(get_current_user)],
)
def getTrackers():
    return tracker_repo.list()


@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(
    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

    try:
        return await _fetch_all_tracks(params)
    except httpx.RequestError as exc:
        raise HTTPException(status_code=502, detail=f"CORE request failed: {exc}") from exc


@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

    try:
        async with httpx.AsyncClient(timeout=30.0, verify=False) as client:
            return await _fetch_tracks_for_tracker(client, tracker_id, params)
    except httpx.RequestError as exc:
        raise HTTPException(status_code=502, detail=f"CORE request failed: {exc}") from exc


@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(
    "/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"}