from .logger_utils import setup_global_logging, log_msg as log
import csv
import io
import json
import os
import ssl
import time
import traceback
from dataclasses import dataclass
from pathlib import Path
from typing import Any, Dict, List, Optional, Tuple
import hashlib
import re
import math
import statistics
import pandas as pd
import numpy as np
import requests
import joblib
import paho.mqtt.client as mqtt

# Import locali corretti
from .settings import load_settings

def build_info() -> str:
    return "infer-debug-v19-fixed"

def main() -> None:
    # 1. Carica impostazioni
    settings = load_settings()
    
    # 2. Setup immediato dei log e dei silenziatori (PRIMA di ogni altra cosa)
    setup_global_logging(settings)
    
    # 3. Ora puoi loggare e tutto sarà sincronizzato e pulito
    cfg_file = settings.get("_config_file", "/config/config.yaml")
    keys = [k for k in settings.keys() if not str(k).startswith("_")]
    
    log(f"Settings loaded from {cfg_file}. Keys: {keys}")
    log(f"BUILD: {build_info()}")

def mac_plain(s: str) -> str:
    """Normalizza MAC a 12 hex uppercase senza separatori."""
    return re.sub(r"[^0-9A-Fa-f]", "", (s or "")).upper()

def mac_colon(s: str) -> str:
    """MAC in formato AA:BB:CC:DD:EE:FF."""
    p = mac_plain(s)
    if len(p) != 12:
        return p
    return ":".join(p[i:i+2] for i in range(0, 12, 2))

def fmt_rssi(v, decimals: int) -> str:
    """Formatta RSSI come stringa, evitando '-82.0' quando decimals=0."""
    if v is None:
        return "nan"
    try:
        fv = float(v)
    except Exception:
        return "nan"
    if math.isnan(fv):
        return "nan"
    if decimals <= 0:
        return str(int(round(fv)))
    return f"{round(fv, decimals):.{decimals}f}"


# -----------------------------

# Build info (printed at startup for traceability)
BUILD_ID = "ble-ai-localizer main.py 2026-01-30 build-floatagg-v1"

def build_info() -> str:
    """Return a short build identifier for logs (no external deps, no git required)."""
    try:
        p = Path(__file__)
        data = p.read_bytes()
        sha = hashlib.sha256(data).hexdigest()[:12]
        size = p.stat().st_size
        return f"{BUILD_ID} sha256={sha} size={size}"
    except Exception:
        return f"{BUILD_ID} sha256=? size=?"

# Settings
# -----------------------------
def load_settings() -> Dict[str, Any]:
    cfg = os.environ.get("CONFIG", "/config/config.yaml")
    import yaml
    with open(cfg, "r", encoding="utf-8") as f:
        data = yaml.safe_load(f) or {}
    data["_config_file"] = cfg

    # Normalize config sections: prefer collect_train
    if "collect_train" not in data and "training" in data:
        log("WARNING: config usa 'training:' (alias). Consiglio: rinomina in 'collect_train:'")
        data["collect_train"] = data.get("training", {}) or {}
    return data


# -----------------------------
# MAC helpers
# -----------------------------
def norm_mac(mac: str) -> str:
    """Return MAC as AA:BB:CC:DD:EE:FF (upper), ignoring separators."""
    m = (mac or "").strip().replace("-", "").replace(":", "").replace(".", "")
    m = m.upper()
    if len(m) != 12:
        return mac.strip().upper()
    return ":".join(m[i:i+2] for i in range(0, 12, 2))


# -----------------------------
# CSV write helpers
# -----------------------------
def safe_write_csv(
    path: Path,
    header: List[str],
    rows: List[Dict[str, Any]],
    delimiter: str = ";",
    rssi_decimals: int = 0,
):
    """Scrive CSV in modo atomico e formattazione 'umana'.

    - numeri interi: senza decimali (es. -82 invece di -82.0)
    - RSSI: arrotondamento controllato da rssi_decimals (0 -> intero, >0 -> N cifre decimali)
      *si applica solo alle colonne RSSI (dopo mac/x/y/z)*
    - NaN: 'nan'
    - colonna 'mac': normalizzata in formato con ':' (es. C3:00:00:57:B9:E7) se passa un MAC valido
    """
    tmp = path.with_suffix(path.suffix + ".tmp")
    # csv.writer richiede un singolo carattere come delimiter
    if not isinstance(delimiter, str) or len(delimiter) != 1:
        delimiter = ";"

    try:
        rssi_decimals = int(rssi_decimals)
    except Exception:
        rssi_decimals = 0
    if rssi_decimals < 0:
        rssi_decimals = 0

    def fmt_cell(v: Any, col: str, idx: int) -> str:
        if v is None:
            return "nan"

        # MAC normalizzato con ':'
        if col.lower() == "mac" and isinstance(v, str):
            v2 = mac_colon(v)
            return v2

        # NaN float
        if isinstance(v, float):
            if math.isnan(v):
                return "nan"

            # colonne RSSI (dopo mac/x/y/z)
            if idx >= 4:
                if rssi_decimals == 0:
                    return str(int(round(v)))
                return f"{v:.{rssi_decimals}f}"

            # altre colonne: compatta i (quasi) interi
            if abs(v - round(v)) < 1e-9:
                return str(int(round(v)))
            return str(v)

        # int / numpy int
        if isinstance(v, (int, np.integer)):
            # RSSI columns (after mac/x/y/z): respect rssi_decimals even for integer values
            if idx >= 4:
                if rssi_decimals == 0:
                    return str(int(v))
                return f"{float(v):.{rssi_decimals}f}"
            return str(int(v))

        # numpy float
        if isinstance(v, np.floating):
            fv = float(v)
            if math.isnan(fv):
                return "nan"
            if idx >= 4:
                if rssi_decimals == 0:
                    return str(int(round(fv)))
                return f"{fv:.{rssi_decimals}f}"
            if abs(fv - round(fv)) < 1e-9:
                return str(int(round(fv)))
            return str(fv)

        return str(v)

    with tmp.open("w", newline="") as f:
        w = csv.writer(f, delimiter=delimiter)
        w.writerow(header)
        for row in rows:
            w.writerow([fmt_cell(row.get(col), col, idx) for idx, col in enumerate(header)])

    tmp.replace(path)




def _coord_token(v: float) -> str:
    # Stable token for filenames from coordinates.
    # - if integer-ish -> '123'
    # - else keep up to 3 decimals, strip trailing zeros, replace '.' with '_'
    try:
        fv=float(v)
    except Exception:
        return str(v)
    if abs(fv - round(fv)) < 1e-9:
        return str(int(round(fv)))
    s=f"{fv:.3f}".rstrip('0').rstrip('.')
    return s.replace('.', '_')
def read_job_csv(job_path: Path, delimiter: str) -> List[Dict[str, Any]]:
    """Legge job CSV supportando due formati:

    1) Legacy:
       mac;x;y;z
       C3000057B9F4;1200;450;0

    2) Esteso (storico):
       Position;Floor;RoomName;X;Y;Z;BeaconName;MAC
       A21;1;P1-NETW;800;1050;1;BC-21;C3:00:00:57:B9:E6

    Estrae solo X,Y,Z,MAC e normalizza MAC in formato compatto (senza ':', uppercase).
    """
    text = job_path.read_text(encoding="utf-8", errors="replace")
    if not text.strip():
        return []

    first_line = next((ln for ln in text.splitlines() if ln.strip()), "")
    use_delim = delimiter
    if use_delim not in first_line:
        if ";" in first_line and "," not in first_line:
            use_delim = ";"
        elif "," in first_line and ";" not in first_line:
            use_delim = ","

    def hnorm(h: str) -> str:
        h = (h or "").strip().lower()
        h = re_sub_non_alnum(h)
        return h

    f = io.StringIO(text)
    r = csv.reader(f, delimiter=use_delim)
    header = next(r, None)
    if not header:
        return []

    header_norm = [hnorm(h) for h in header]
    idx = {name: i for i, name in enumerate(header_norm) if name}

    def find_idx(names: List[str]) -> Optional[int]:
        for n in names:
            if n in idx:
                return idx[n]
        return None

    mac_i = find_idx(["mac", "beaconmac", "beacon_mac", "trackermac", "tracker_mac", "device", "devicemac"])
    x_i = find_idx(["x"])
    y_i = find_idx(["y"])
    z_i = find_idx(["z"])

    if mac_i is None or x_i is None or y_i is None or z_i is None:
        raise ValueError(
            f"Job CSV header non riconosciuto: {header}. "
            f"Attesi campi MAC/X/Y/Z (case-insensitive)."
        )

    rows: List[Dict[str, Any]] = []
    for cols in r:
        if not cols:
            continue
        if len(cols) <= max(mac_i, x_i, y_i, z_i):
            continue
        mac_raw = (cols[mac_i] or "").strip()
        if not mac_raw:
            continue

        mac_compact = norm_mac(mac_raw).replace(":", "")

        try:
            x = float((cols[x_i] or "").strip())
            y = float((cols[y_i] or "").strip())
            z = float((cols[z_i] or "").strip())
        except Exception:
            continue

        rows.append({"mac": mac_compact, "x": x, "y": y, "z": z})

    return rows


def re_sub_non_alnum(s: str) -> str:
    out = []
    for ch in s:
        if ("a" <= ch <= "z") or ("0" <= ch <= "9"):
            out.append(ch)
    return "".join(out)


def write_samples_csv(
    out_path: Path,
    sample_rows: List[Dict[str, Any]],
    gateway_macs: List[str],
    *,
    delimiter: str = ";",
    rssi_decimals: int = 0,
) -> None:
    header = ["mac", "x", "y", "z"] + gateway_macs
    safe_write_csv(out_path, header, sample_rows, delimiter=delimiter, rssi_decimals=rssi_decimals)

def load_gateway_csv(path: Path, delimiter: str = ";") -> Tuple[List[str], int, int]:
    df = pd.read_csv(path, delimiter=delimiter)
    cols = [c.strip().lower() for c in df.columns]
    df.columns = cols

    invalid = 0
    macs: List[str] = []
    seen = set()

    if "mac" not in df.columns:
        raise ValueError(f"gateway.csv must have a 'mac' column, got columns={list(df.columns)}")

    for v in df["mac"].astype(str).tolist():
        nm = norm_mac(v)
        if len(nm.replace(":", "")) != 12:
            invalid += 1
            continue
        if nm in seen:
            continue
        seen.add(nm)
        macs.append(nm)

    duplicates = max(0, len(df) - invalid - len(macs))
    return macs, invalid, duplicates


# -----------------------------
# Fingerprint collector
# -----------------------------
@dataclass
class FingerprintStats:
    counts: Dict[str, Dict[str, int]]
    last: Dict[str, Dict[str, float]]


class FingerprintCollector:
    def __init__(self) -> None:
        self._lock = None
        try:
            import threading
            self._lock = threading.Lock()
        except Exception:
            self._lock = None

        # beacon_norm -> gw_norm -> list of rssi
        self.rssi: Dict[str, Dict[str, List[float]]] = {}
        self.last_seen_gw: Dict[str, float] = {}
        self.last_seen_beacon: Dict[str, float] = {}

    def _with_lock(self):
        if self._lock is None:
            class Dummy:
                def __enter__(self): return None
                def __exit__(self, *a): return False
            return Dummy()
        return self._lock

    def update(self, gw_mac: str, beacon_mac: str, rssi: float) -> None:
        gw = norm_mac(gw_mac)
        b = norm_mac(beacon_mac)
        now = time.time()
        with self._with_lock():
            self.last_seen_gw[gw] = now
            self.last_seen_beacon[b] = now
            self.rssi.setdefault(b, {}).setdefault(gw, []).append(float(rssi))

    def stats(self, beacons: List[str], gateways: List[str]) -> FingerprintStats:
        with self._with_lock():
            counts: Dict[str, Dict[str, int]] = {b: {g: 0 for g in gateways} for b in beacons}
            last: Dict[str, Dict[str, float]] = {b: {g: float("nan") for g in gateways} for b in beacons}
            for b in beacons:
                bm = norm_mac(b)
                for g in gateways:
                    gm = norm_mac(g)
                    vals = self.rssi.get(bm, {}).get(gm, [])
                    counts[bm][gm] = len(vals)
                    if vals:
                        last[bm][gm] = vals[-1]
            return FingerprintStats(counts=counts, last=last)

    def feature_row(
        self,
        beacon_mac: str,
        gateways: List[str],
        aggregate: str,
        rssi_min: float,
        rssi_max: float,
        min_samples_per_gateway: int,
        outlier_method: str,
        mad_z: float,
        iqr_k: float,
        max_stddev: Optional[float],
    ) -> Dict[str, float]:
        b = norm_mac(beacon_mac)
        out: Dict[str, float] = {}
        with self._with_lock():
            for g in gateways:
                gm = norm_mac(g)
                vals = list(self.rssi.get(b, {}).get(gm, []))

                # hard clamp
                vals = [v for v in vals if (rssi_min <= v <= rssi_max)]
                if len(vals) < min_samples_per_gateway:
                    out[gm] = float("nan")
                    continue

                # outlier removal
                vals2 = vals
                if outlier_method == "mad":
                    vals2 = mad_filter(vals2, z=mad_z)
                elif outlier_method == "iqr":
                    vals2 = iqr_filter(vals2, k=iqr_k)

                if len(vals2) < min_samples_per_gateway:
                    out[gm] = float("nan")
                    continue

                if max_stddev is not None:
                    import statistics
                    try:
                        sd = statistics.pstdev(vals2)
                        if sd > max_stddev:
                            out[gm] = float("nan")
                            continue
                    except Exception:
                        pass

                # Aggregate: mantieni float (niente cast a int) per poter usare rssi_decimals.
                if aggregate == "median":
                    out[gm] = float(statistics.median(vals2))
                elif aggregate == "median_low":
                    out[gm] = float(statistics.median_low(sorted(vals2)))
                elif aggregate == "median_high":
                    out[gm] = float(statistics.median_high(sorted(vals2)))
                elif aggregate == "mean":
                    out[gm] = float(statistics.fmean(vals2))
                else:
                    out[gm] = float(statistics.median(vals2))
        return out


def mad_filter(vals: List[float], z: float = 3.5) -> List[float]:
    if not vals:
        return vals
    s = pd.Series(vals)
    med = s.median()
    mad = (s - med).abs().median()
    if mad == 0:
        return vals
    mz = 0.6745 * (s - med).abs() / mad
    return [float(v) for v, keep in zip(vals, (mz <= z).tolist()) if keep]


def iqr_filter(vals: List[float], k: float = 1.5) -> List[float]:
    if not vals:
        return vals
    s = pd.Series(vals)
    q1 = s.quantile(0.25)
    q3 = s.quantile(0.75)
    iqr = q3 - q1
    if iqr == 0:
        return vals
    lo = q1 - k * iqr
    hi = q3 + k * iqr
    return [float(v) for v in vals if lo <= v <= hi]


# -----------------------------
# MQTT parsing
# -----------------------------
def parse_topic_gateway(topic: str) -> Optional[str]:
    # expected: publish_out/<gwmac>
    parts = (topic or "").split("/")
    if len(parts) < 2:
        return None
    return parts[-1]


def parse_payload_list(payload: bytes) -> Optional[List[Dict[str, Any]]]:
    try:
        obj = json.loads(payload.decode("utf-8", errors="replace"))
        if isinstance(obj, list):
            return obj
        return None
    except Exception:
        return None


def is_gateway_announce(item: Dict[str, Any]) -> bool:
    return str(item.get("type", "")).strip().lower() == "gateway" and "mac" in item


# -----------------------------
# Collect train
# -----------------------------
def run_collect_train(settings: Dict[str, Any]) -> None:
    cfg = settings.get("collect_train", {}) or {}
    paths = settings.get("paths", {}) or {}
    mqtt_cfg = settings.get("mqtt", {}) or {}
    debug = settings.get("debug", {}) or {}

    window_seconds = float(cfg.get("window_seconds", 180))
    poll_seconds = float(cfg.get("poll_seconds", 2))
    min_non_nan = int(cfg.get("min_non_nan", 3))
    min_samples_per_gateway = int(cfg.get("min_samples_per_gateway", 5))
    aggregate = str(cfg.get("aggregate", "median"))
    # Numero di cifre decimali per i valori RSSI nei file samples (0 = intero)
    try:
        rssi_decimals = int(cfg.get("rssi_decimals", 0))
    except Exception:
        rssi_decimals = 0
    if rssi_decimals < 0:
        rssi_decimals = 0
    rssi_min = float(cfg.get("rssi_min", -110))
    rssi_max = float(cfg.get("rssi_max", -25))
    outlier_method = str(cfg.get("outlier_method", "mad"))
    mad_z = float(cfg.get("mad_z", 3.5))
    iqr_k = float(cfg.get("iqr_k", 1.5))
    max_stddev = cfg.get("max_stddev", None)
    max_stddev = float(max_stddev) if max_stddev is not None else None

    gateway_csv = Path(paths.get("gateways_csv", "/data/config/gateway.csv"))
    csv_delimiter = str(paths.get("csv_delimiter", ";"))

    jobs_dir = Path(cfg.get("jobs_dir", "/data/train/jobs"))
    pending_dir = jobs_dir / "pending"
    done_dir = jobs_dir / "done"
    error_dir = jobs_dir / "error"
    samples_dir = Path(cfg.get("samples_dir", "/data/train/samples"))

    pending_dir.mkdir(parents=True, exist_ok=True)
    done_dir.mkdir(parents=True, exist_ok=True)
    error_dir.mkdir(parents=True, exist_ok=True)
    samples_dir.mkdir(parents=True, exist_ok=True)

    gw_ready_log_seconds = float(cfg.get("gw_ready_log_seconds", 10))
    gw_ready_sleep_seconds = float(cfg.get("gw_ready_sleep_seconds", 5))
    gw_ready_check_before_job = bool(cfg.get("gw_ready_check_before_job", True))
    online_max_age_s = float(debug.get("online_check_seconds", 30))
    progress_log_seconds = float(cfg.get("wait_all_gateways_log_seconds", 30))

    gateway_macs, invalid, duplicates = load_gateway_csv(gateway_csv, delimiter=csv_delimiter)
    log(f"[gateway.csv] loaded gateways={len(gateway_macs)} invalid={invalid} duplicates={duplicates}")

    log(
        "COLLECT_TRAIN config: gateway_csv=%s gateways(feature-set)=%d window_seconds=%.1f poll_seconds=%.1f rssi_decimals=%d jobs_dir=%s "
        "pending_dir=%s done_dir=%s error_dir=%s samples_dir=%s mqtt=%s:%s topic=%s"
        % (
            gateway_csv,
            len(gateway_macs),
            window_seconds,
            poll_seconds,
            rssi_decimals,
            jobs_dir,
            pending_dir,
            done_dir,
            error_dir,
            samples_dir,
            mqtt_cfg.get("host", ""),
            mqtt_cfg.get("port", ""),
            mqtt_cfg.get("topic", "publish_out/#"),
        )
    )

    fp = FingerprintCollector()

    # MQTT setup
    host = mqtt_cfg.get("host", "127.0.0.1")
    port = int(mqtt_cfg.get("port", 1883))
    topic = mqtt_cfg.get("topic", "publish_out/#")
    client_id = mqtt_cfg.get("client_id", "ble-ai-localizer")
    keepalive = int(mqtt_cfg.get("keepalive", 60))
    proto = mqtt.MQTTv311

    def on_connect(client, userdata, flags, rc):
        log(f"MQTT connected rc={rc}, subscribed to {topic}")
        client.subscribe(topic)

    def on_message(client, userdata, msg):
        gw_from_topic = parse_topic_gateway(msg.topic)
        if not gw_from_topic:
            return
        payload_list = parse_payload_list(msg.payload)
        if not payload_list:
            return

        for it in payload_list:
            if not isinstance(it, dict):
                continue
            if is_gateway_announce(it):
                gwm = it.get("mac", gw_from_topic)
                fp.last_seen_gw[norm_mac(gwm)] = time.time()
                continue

            bmac = it.get("mac")
            rssi = it.get("rssi")
            if not bmac or rssi is None:
                continue
            try:
                fp.update(gw_from_topic, bmac, float(rssi))
            except Exception:
                continue

    client = mqtt.Client(client_id=client_id, protocol=proto)
    client.on_connect = on_connect
    client.on_message = on_message

    username = str(mqtt_cfg.get("username", "") or "")
    password = str(mqtt_cfg.get("password", "") or "")
    if username:
        client.username_pw_set(username, password)

    tls = bool(mqtt_cfg.get("tls", False))
    if tls:
        client.tls_set(cert_reqs=ssl.CERT_NONE)
        client.tls_insecure_set(True)

    log("MQTT thread started (collect_train)")
    client.connect(host, port, keepalive=keepalive)
    client.loop_start()

    # Wait gateways online
    last_ready_log = 0.0
    while True:
        now = time.time()
        online = 0
        missing = []
        for g in gateway_macs:
            seen = fp.last_seen_gw.get(norm_mac(g))
            if seen is not None and (now - seen) <= online_max_age_s:
                online += 1
            else:
                missing.append(norm_mac(g))
        if online == len(gateway_macs):
            log(f"GW READY: online={online}/{len(gateway_macs)} (max_age_s={online_max_age_s:.1f})")
            break
        if now - last_ready_log >= gw_ready_log_seconds:
            log(f"WAIT gateways online ({len(missing)} missing, seen={online}/{len(gateway_macs)}): {missing} (max_age_s={online_max_age_s:.1f})")
            last_ready_log = now
        time.sleep(gw_ready_sleep_seconds)

    # Job loop
    while True:
        try:
            # periodic gw ready log
            now = time.time()
            if now - last_ready_log >= gw_ready_log_seconds:
                online = 0
                for g in gateway_macs:
                    seen = fp.last_seen_gw.get(norm_mac(g))
                    if seen is not None and (now - seen) <= online_max_age_s:
                        online += 1
                log(f"GW READY: online={online}/{len(gateway_macs)} (max_age_s={online_max_age_s:.1f})")
                last_ready_log = now

            # pick job
            job_files = sorted(pending_dir.glob("*.csv"))
            if not job_files:
                time.sleep(poll_seconds)
                continue

            job_path = job_files[0]
            job_name = job_path.name

            rows = read_job_csv(job_path, delimiter=csv_delimiter)
            if not rows:
                # move empty/bad jobs to error
                log(f"TRAIN job ERROR: {job_name} err=EmptyJob: no valid rows")
                job_path.rename(error_dir / job_path.name)
                continue

            # normalize beacons for stats keys
            job_beacons_norm = [norm_mac(r["mac"]) for r in rows]

            # optionally wait gateways online before starting the window
            if gw_ready_check_before_job:
                while True:
                    now = time.time()
                    online = 0
                    missing = []
                    for g in gateway_macs:
                        seen = fp.last_seen_gw.get(norm_mac(g))
                        if seen is not None and (now - seen) <= online_max_age_s:
                            online += 1
                        else:
                            missing.append(norm_mac(g))
                    if online == len(gateway_macs):
                        break
                    log(f"WAIT gateways online before job ({len(missing)} missing, seen={online}/{len(gateway_macs)}): {missing}")
                    time.sleep(1.0)

            log(f"TRAIN job START: {job_name} beacons={len(rows)}")

            start = time.time()
            deadline = start + window_seconds
            next_progress = start + progress_log_seconds

            while time.time() < deadline:
                time.sleep(0.5)
                if progress_log_seconds > 0 and time.time() >= next_progress:
                    st = fp.stats(job_beacons_norm, gateway_macs)
                    parts = []
                    for b in job_beacons_norm:
                        total = sum(st.counts[b].values())
                        gw_seen = sum(1 for g in gateway_macs if st.counts[b][g] > 0)
                        parts.append(f"{b.replace(':','')}: total={total} gw={gw_seen}/{len(gateway_macs)}")
                    elapsed = int(time.time() - start)
                    log(f"COLLECT progress: {elapsed}s/{int(window_seconds)}s " + " | ".join(parts))
                    next_progress = time.time() + progress_log_seconds

            out_rows: List[Dict[str, Any]] = []
            st = fp.stats(job_beacons_norm, gateway_macs)

            for r, b_norm in zip(rows, job_beacons_norm):
                feats = fp.feature_row(
                    beacon_mac=b_norm,
                    gateways=gateway_macs,
                    aggregate=aggregate,
                    rssi_min=rssi_min,
                    rssi_max=rssi_max,
                    min_samples_per_gateway=min_samples_per_gateway,
                    outlier_method=outlier_method,
                    mad_z=mad_z,
                    iqr_k=iqr_k,
                    max_stddev=max_stddev,
                )

                non_nan = sum(1 for g in gateway_macs if feats.get(g) == feats.get(g))
                if non_nan < min_non_nan:
                    sample_info = []
                    for g in gateway_macs:
                        c = st.counts[b_norm][g]
                        if c > 0:
                            sample_info.append(f"{g} n={c} last={st.last[b_norm][g]}")
                    preview = ", ".join(sample_info[:8]) + (" ..." if len(sample_info) > 8 else "")
                    log(
                        f"WARNING: beacon {b_norm.replace(':','')} low features non_nan={non_nan} "
                        f"(seen_gw={sum(1 for g in gateway_macs if st.counts[b_norm][g]>0)}) [{preview}]"
                    )

                out_row: Dict[str, Any] = {
                    "mac": r["mac"],   # MAC sempre compatto, senza ':'
                    "x": float(r["x"]),
                    "y": float(r["y"]),
                    "z": float(r["z"]),
                }
                out_row.update(feats)
                out_rows.append(out_row)

            written = []
            for out_row in out_rows:
                # Nome file: Z_X_Y.csv (Z, X, Y presi dal job)
                zt = _coord_token(out_row.get("z"))
                xt = _coord_token(out_row.get("x"))
                yt = _coord_token(out_row.get("y"))
                base_name = f"{zt}_{xt}_{yt}.csv"
                out_path = samples_dir / base_name
                write_samples_csv(out_path, [out_row], gateway_macs, delimiter=csv_delimiter, rssi_decimals=rssi_decimals)
                written.append(out_path.name)

            job_path.rename(done_dir / job_path.name)
            if written:
                shown = ", ".join(written[:10])
                more = "" if len(written) <= 10 else f" (+{len(written)-10} altri)"
                log(f"TRAIN job DONE: wrote {len(written)} sample files to {samples_dir}: {shown}{more}")
            else:
                log(f"TRAIN job DONE: no output rows (empty job?)")

        except Exception as e:
            log(f"TRAIN job ERROR: {job_name} err={type(e).__name__}: {e}")
            try:
                job_path.rename(error_dir / job_path.name)
            except Exception:
                pass
            time.sleep(0.5)


def main() -> None:
    settings = load_settings()
    cfg_file = settings.get("_config_file", "")
    keys = [k for k in settings.keys() if not str(k).startswith("_")]
    log(f"Settings loaded from {cfg_file}. Keys: {keys}")
    log(f"BUILD: {build_info()}")

    mode = str(settings.get("mode", "collect_train")).strip().lower()

    if mode == "collect_train":
        run_collect_train(settings)
        return

    if mode == "train":
        from .train_mode import run_train
        run_train(settings)
        return

    if mode == "infer":
        from .infer_mode import run_infer
        run_infer(settings)
        return

    raise ValueError(f"unknown mode: {mode}")


if __name__ == "__main__":
    main()