#!/bin/bash
# Script per testare comunicazione diretta con inverter
# Usa questo per verificare se il device risponde correttamente

DEVICE="${1:-/dev/ttyUSB0}"

echo "=== Test Comunicazione Inverter su $DEVICE ==="
echo ""

# Verifica device esiste
if [ ! -e "$DEVICE" ]; then
    echo "ERROR: Device $DEVICE non trovato!"
    exit 1
fi

# Verifica permessi
if [ ! -r "$DEVICE" ] || [ ! -w "$DEVICE" ]; then
    echo "ERROR: Permessi insufficienti su $DEVICE"
    echo "Esegui: sudo chmod 666 $DEVICE"
    exit 1
fi

echo "1. Configurazione device seriale..."
stty -F $DEVICE 2400 cs8 -cstopb -parenb -echo raw

echo "2. Test con cat (premi Ctrl+C dopo 5 secondi)..."
echo "   Questo mostrerà eventuali dati inviati dall'inverter..."
timeout 5 cat $DEVICE | od -A x -t x1z -v | head -20

echo ""
echo "3. Invio comando raw QMOD all'inverter..."

# Crea script Python per inviare comando con CRC corretto
python3 << 'PYTHON_EOF'
import sys
import serial
import time

def calc_crc(data):
    """Calcola CRC secondo protocollo Voltronic"""
    crc_ta = [
        0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,
        0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef
    ]
    
    crc = 0
    for byte in data:
        da = ((crc >> 8) >> 4)
        crc = (crc << 4) & 0xFFFF
        crc ^= crc_ta[da ^ (byte >> 4)]
        da = ((crc >> 8) >> 4)
        crc = (crc << 4) & 0xFFFF
        crc ^= crc_ta[da ^ (byte & 0x0f)]
    
    crc_high = (crc >> 8) & 0xFF
    crc_low = crc & 0xFF
    
    # Adjust for special bytes
    if crc_low in [0x28, 0x0d, 0x0a]:
        crc_low += 1
    if crc_high in [0x28, 0x0d, 0x0a]:
        crc_high += 1
    
    return bytes([crc_high, crc_low])

try:
    ser = serial.Serial(
        port=sys.argv[1] if len(sys.argv) > 1 else '/dev/ttyUSB0',
        baudrate=2400,
        bytesize=serial.EIGHTBITS,
        parity=serial.PARITY_NONE,
        stopbits=serial.STOPBITS_ONE,
        timeout=3
    )
    
    # Flush buffers
    ser.reset_input_buffer()
    ser.reset_output_buffer()
    time.sleep(0.2)
    
    # Test comandi
    commands = ['QMOD', 'QPIGS', 'QPIRI', 'QPIWS']
    
    for cmd in commands:
        print(f"\n--- Testing {cmd} ---")
        
        # Prepare command
        cmd_bytes = cmd.encode('ascii')
        crc = calc_crc(cmd_bytes)
        full_cmd = cmd_bytes + crc + b'\r'
        
        print(f"Sending: {full_cmd.hex()}")
        
        # Send
        ser.write(full_cmd)
        ser.flush()
        time.sleep(0.3)
        
        # Read response
        response = ser.read(200)
        
        if len(response) > 0:
            print(f"Received {len(response)} bytes")
            print(f"Hex: {response.hex()}")
            try:
                print(f"ASCII: {response.decode('ascii', errors='replace')}")
            except:
                print(f"ASCII: {response}")
            
            if response[0:1] == b'(':
                print(f"[OK] Valid start byte")
                if response[-1:] == b'\r':
                    print(f"[OK] Valid end byte")
                    print(f">>> Buffer size for {cmd}: {len(response)}")
                else:
                    print(f"[ERROR] Invalid end byte: {response[-1]:02x}")
            else:
                print(f"[ERROR] Invalid start byte: {response[0]:02x}")
        else:
            print("✗ No response received")
        
        time.sleep(1)
    
    ser.close()
    
except Exception as e:
    print(f"Error: {e}")
    sys.exit(1)

PYTHON_EOF

echo ""
echo "=== Test completato ===="