import os, sys, time, csv, statistics, threading, queue

scriptDir = os.path.dirname(os.path.realpath(__file__))
DEFAULT_OUTDIR = os.path.join(scriptDir, "logs")

class DeviceWorker:
    """
    Arbeitet genau wie dein Single-Gerät-Logger:
    - filter_window_size Rohsamples pro Loop
    - ~10 Hz Loop (interval=0.1)
    - 1 Hz Logging (eine CSV-Zeile pro Sekunde)
    Wichtig: kontrolliert NICHT die Session!
    """
    def __init__(self, dev, outdir=DEFAULT_OUTDIR, filter_window_size=10, interval=0.1):
        self.dev = dev
        self.serial = getattr(dev, "serial", "UNKNOWN")
        self.outdir = outdir
        self._log_path = None
        self.filter_window_size = filter_window_size
        self.interval = interval

        self._running = False
        self._stop_evt = threading.Event()
        self._cmdq = queue.Queue()
        self._writer_q = queue.Queue(maxsize=50)

        self._reader_t = threading.Thread(target=self._reader_loop, daemon=True)
        self._writer_t = threading.Thread(target=self._writer_loop, daemon=True)

    # ---- API ----
    def start(self):
        print(f"[{self.serial}] Worker.start()")
        if not self._reader_t.is_alive(): self._reader_t.start()
        if not self._writer_t.is_alive(): self._writer_t.start()
        self._cmdq.put(("start", None))

    def stop(self):
        print(f"[{self.serial}] Worker.stop()")
        self._cmdq.put(("stop", None))

    def _reader_loop(self):
        print(f"[{self.serial}] Reader gestartet (interval={self.interval}, n={self.filter_window_size})")
        filter_window_size = 10
        interval = 0.1
        last_log = 0.0
        current_direction = 1  # falls du das brauchst wie im Single-Logger
        last_log = 0.0
        while not self._stop_evt.is_set():
            if not self._running:
                time.sleep(0.05); continue
            try:
                # exakt wie im Single-Logger:
                samples = self.dev.read(filter_window_size, 500, True)

                if not samples:
                    time.sleep(interval)
                    continue

                # WICHTIG: gleiche Indizes wie in deinem Logger!
                raw_voltage = float(np.mean([s[1][0] for s in samples]))         # VB
                raw_current = float(np.mean([s[0][1] for s in samples])) * current_direction  # IA

                now = time.time()
                if now - last_log >= 1.0:  # 1 Hz loggen
                    self._writer_q.put((now, raw_voltage, raw_current))
                    last_log = now

            except Exception as e:
                print(f"[{self.serial}] Read-Fehler: {e}")
                time.sleep(0.05)

            time.sleep(max(0.05, interval))

    def _writer_loop(self):
        try:
            os.makedirs(self.outdir, exist_ok=True)
        except Exception as e:
            print(f"[{self.serial}] os.makedirs-Fehler für '{self.outdir}': {e}")
            return

        self._log_path = os.path.join(self.outdir, f"{time.strftime('%Y%m%d_%H%M%S')}_{self.serial}.csv")
        print(f"[{self.serial}] Writer startet → {self._log_path}")

        try:
            with open(self._log_path, "w", newline="") as f:
                w = csv.writer(f)
                w.writerow(["timestamp", "A", "B"])  # Datei wird JETZT angelegt
                while not (self._stop_evt.is_set() and self._writer_q.empty()):
                    try:
                        ts, vA, vB = self._writer_q.get(timeout=0.5)
                    except queue.Empty:
                        continue
                    w.writerow([ts, vA, vB])
                    f.flush()
        except Exception as e:
            print(f"[{self.serial}] Writer-Fehler ({self._log_path}): {e}")
        finally:
            print(f"[{self.serial}] Writer beendet: {self._log_path}")