#!/usr/bin/env python3
"""Dump all EEPROM indices from Winegard G2 firmware via RS-422."""

import re
import sys
import time

import serial

PORT = "/dev/ttyUSB2"
BAUD = 115200
PROMPT = b">"
MAX_INDEX = 100  # scan up to this index


def send_cmd(ser: serial.Serial, cmd: str) -> str:
    """Send command + CR, read until prompt '>'."""
    ser.reset_input_buffer()
    ser.write(f"{cmd}\r".encode("ascii"))
    buf = bytearray()
    while True:
        b = ser.read(1)
        if len(b) == 0:
            break  # timeout
        buf.append(b[0])
        if b[0] == ord(">"):
            break
    return buf.decode("utf-8", errors="ignore")


def main():
    ser = serial.Serial(PORT, BAUD, timeout=3)
    time.sleep(0.1)

    # Navigate to EE submenu
    send_cmd(ser, "q")  # ensure root
    resp = send_cmd(ser, "eeprom")
    if "EE>" not in resp:
        print(f"Failed to enter EEPROM menu: {resp!r}", file=sys.stderr)
        ser.close()
        sys.exit(1)

    print(f"{'Index':>5}  {'Decimal':>10}  {'Hex':>10}  Status")
    print("-" * 50)

    valid_count = 0
    for idx in range(MAX_INDEX + 1):
        resp = send_cmd(ser, f"ee {idx}")

        # Parse response
        if "Read value" in resp:
            match = re.search(r"Read value = (\d+)", resp)
            if match:
                val = int(match.group(1))
                print(f"{idx:>5}  {val:>10}  0x{val:08X}  OK")
                valid_count += 1
        elif "Failed to read" in resp:
            match = re.search(r"val:(\d+)", resp)
            val_str = match.group(1) if match else "?"
            val = int(val_str) if val_str != "?" else 0
            print(f"{idx:>5}  {val:>10}  0x{val:08X}  INVALID")
        else:
            # Unknown response - might be end of range
            clean = resp.strip().replace("\r\n", " | ")
            print(f"{idx:>5}  {'':>10}  {'':>10}  ERROR: {clean}")

    print("-" * 50)
    print(f"Valid entries: {valid_count} / {MAX_INDEX + 1}")

    # Return to root
    send_cmd(ser, "q")
    ser.close()


if __name__ == "__main__":
    main()