#!/usr/bin/env python3
"""
NFC Pin Mapping Diagnostic for ESP32-C5-EVB
Verifies the UEXT connector GPIO assignments
"""

import requests
import json
import sys

DEVICE_IP = sys.argv[1] if len(sys.argv) > 1 else "192.168.0.240"
WEB_USER = "Ske087"
WEB_PASS = "Matei@123"

print("=" * 70)
print("ESP32-C5-EVB UEXT Pin Mapping Diagnostic")
print("=" * 70)

# Try to get device info
try:
    resp = requests.get(f"http://{DEVICE_IP}/", 
                       auth=(WEB_USER, WEB_PASS), 
                       timeout=2)
    if resp.status_code == 200:
        print(f"\n✓ Device reachable at {DEVICE_IP}\n")
    else:
        print(f"\n✗ Device responded with {resp.status_code}")
except Exception as e:
    print(f"\n✗ Cannot reach device: {e}")
    sys.exit(1)

# Check NFC status
try:
    resp = requests.get(f"http://{DEVICE_IP}/nfc/status",
                       auth=(WEB_USER, WEB_PASS),
                       timeout=2)
    nfc_status = resp.json()
    
    print("NFC Module Status:")
    print(f"  Initialized: {nfc_status.get('initialized', False)}")
    print(f"  Enabled: {nfc_status.get('nfc_enabled', False)}")
    print(f"  Access State: {nfc_status.get('access_state', 'unknown')}")
    
    if not nfc_status.get('initialized'):
        print("\n⚠️  NFC module NOT initialized!")
        print("\nDiagnostic Checklist:")
        print("  1. Is PN532 physically connected to UEXT connector?")
        print("  2. Are DIP switches set to HSU mode (DIP1=0, DIP2=0)?")
        print("  3. Check 3.3V power on UEXT Pin 2 (multimeter)")
        print("  4. Verify TX/RX wiring:")
        print("     - UEXT Pin 3 (GPIO26) → PN532 RXD")
        print("     - UEXT Pin 4 (GPIO25) ← PN532 TXD")
        print("  5. Some PN532 boards need 100Ω resistor on TX line")
        
except Exception as e:
    print(f"✗ Cannot get NFC status: {e}")

print("\n" + "=" * 70)
print("C5-EVB vs C6-EVB UEXT Pin Mapping Reference:")
print("=" * 70)

print("""
C6-EVB (for reference):
  UEXT Pin 3 → GPIO4  (UART1 TX)
  UEXT Pin 4 → GPIO5  (UART1 RX)

C5-EVB (current board):
  UEXT Pin 3 → GPIO26 (UART1 TX)
  UEXT Pin 4 → GPIO25 (UART1 RX)
  UEXT Pin 1 → GND
  UEXT Pin 2 → +3V3 (power)

If you previously worked with C6 and connected PN532 to GPIO 4/5,
you MUST move it to GPIO 26/25 on the C5!
""")
print("=" * 70)