#include <cutter.h>
#include <pthread.h>
#include <signal.h>
#include <unistd.h>

#include "nfc/nfc.h"
#include "utils/nfc-utils.h"

#define INITIATOR 0
#define TARGET    1

pthread_t threads[2];
nfc_connstring connstrings[2];
nfc_device *devices[2];
intptr_t result[2];

void
abort_test_by_keypress (int sig)
{
  (void) sig;
  printf ("\033[0;1;31mSIGINT\033[0m");

  nfc_abort_command (devices[INITIATOR]);
  nfc_abort_command (devices[TARGET]);
}

void
cut_setup (void)
{
  size_t n;

  nfc_list_devices (connstrings, 2, &n);
  if (n < 2) {
    cut_omit ("At least two NFC devices must be plugged-in to run this test");
  }

  devices[TARGET] = nfc_connect (connstrings[TARGET]);
  devices[INITIATOR] = nfc_connect (connstrings[INITIATOR]);

  signal (SIGINT, abort_test_by_keypress);
}

void
cut_teardown (void)
{
  nfc_disconnect (devices[TARGET]);
  nfc_disconnect (devices[INITIATOR]);
}

struct thread_data {
  nfc_device *device;
  void *cut_test_context;
  nfc_baud_rate nbr;
};

void *
target_thread (void *arg)
{
  intptr_t thread_res = 0;
  nfc_device *device = ((struct thread_data *) arg)->device;
  cut_set_current_test_context (((struct thread_data *) arg)->cut_test_context);

  printf ("=========== TARGET %s =========\n", nfc_device_name (device));
  nfc_target nt = {
    .nm = {
      .nmt = NMT_DEP,
      .nbr = NBR_UNDEFINED
    },
    .nti = {
      .ndi = {
        .abtNFCID3 = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA },
        .szGB = 4,
        .abtGB = { 0x12, 0x34, 0x56, 0x78 },
        .ndm = NDM_ACTIVE,
        /* These bytes are not used by nfc_target_init: the chip will provide them automatically to the initiator */
        .btDID = 0x00,
        .btBS = 0x00,
        .btBR = 0x00,
        .btTO = 0x00,
        .btPP = 0x01,
      },
    },
  };

  uint8_t abtRx[1024];
  size_t szRx = sizeof (abtRx);
  bool res = nfc_target_init (device, &nt, abtRx, &szRx);
  cut_assert_true (res, cut_message ("Can't initialize NFC device as target: %s", nfc_strerror (device)));
  if (!res) { thread_res = -1; return (void*) thread_res; }

  res = nfc_target_receive_bytes (device, abtRx, &szRx, 500);
  cut_assert_true (res, cut_message ("Can't receive bytes from initiator: %s", nfc_strerror (device)));

  const uint8_t abtAttRx[] = "Hello DEP target!";
  cut_assert_equal_memory (abtAttRx, sizeof (abtAttRx), abtRx, szRx, cut_message ("Invalid received data"));
  if (!res) { thread_res = -1; return (void*) thread_res; }
  
  const uint8_t abtTx[] = "Hello DEP initiator!";
  res = nfc_target_send_bytes (device, abtTx, sizeof(abtTx), 500);
  cut_assert_true (res, cut_message ("Can't send bytes to initiator: %s", nfc_strerror (device)));
  if (!res) { thread_res = -1; return (void*) thread_res; }

  return (void *) thread_res;
}

void *
initiator_thread (void *arg)
{
  intptr_t thread_res = 0;
  nfc_device *device = ((struct thread_data *) arg)->device;
  cut_set_current_test_context (((struct thread_data *) arg)->cut_test_context);
  nfc_baud_rate nbr = (((struct thread_data *) arg)->nbr);

  /*
   * Wait some time for the other thread to initialise NFC device as target
   */
  sleep (1);
  printf ("=========== INITIATOR %s =========\n", nfc_device_name (device));
  bool res = nfc_initiator_init (device);
  cut_assert_equal_int (0, res, cut_message ("Can't initialize NFC device as initiator: %s", nfc_strerror (device)));
  if (!res) { thread_res = -1; return (void*) thread_res; }

  nfc_target nt;

  // Active mode 
  printf ("=========== INITIATOR %s (Active mode / %s Kbps) =========\n", nfc_device_name (device), str_nfc_baud_rate(nbr));
  res = nfc_initiator_select_dep_target (device, NDM_ACTIVE, nbr, NULL, &nt, 1000);
  cut_assert_true (res, cut_message ("Can't select any DEP target: %s", nfc_strerror (device)));
  cut_assert_equal_int (NMT_DEP, nt.nm.nmt, cut_message ("Invalid target modulation"));
  cut_assert_equal_int (nbr, nt.nm.nbr, cut_message ("Invalid target baud rate"));
  cut_assert_equal_memory ("\x11\x22\x33\x44\x55\x66\x77\x88\x99\xAA", 10, nt.nti.ndi.abtNFCID3, 10, cut_message ("Invalid target NFCID3"));
  cut_assert_equal_int (NDM_ACTIVE, nt.nti.ndi.ndm, cut_message ("Invalid target DEP mode"));
  cut_assert_equal_memory ("\x12\x34\x56\x78", 4, nt.nti.ndi.abtGB, nt.nti.ndi.szGB, cut_message ("Invalid target general bytes"));
  if (!res) { thread_res = -1; return (void*) thread_res; }

  const uint8_t abtTx[] = "Hello DEP target!";
  uint8_t abtRx[1024];
  size_t szRx = sizeof (abtRx);
  res = nfc_initiator_transceive_bytes (device, abtTx, sizeof (abtTx), abtRx, &szRx, 5000);
  cut_assert_true (res, cut_message ("Can't transceive bytes to target: %s", nfc_strerror (device)));

  const uint8_t abtAttRx[] = "Hello DEP initiator!";
  cut_assert_equal_memory (abtAttRx, sizeof (abtAttRx), abtRx, szRx, cut_message ("Invalid received data"));
  if (!res) { thread_res = -1; return (void*) thread_res; }
  res = nfc_initiator_deselect_target (device);
  cut_assert_true (res, cut_message ("Can't deselect target: %s", nfc_strerror (device)));
  if (!res) { thread_res = -1; return (void*) thread_res; }

  return (void *) thread_res;
}

void
test_dep (void)
{
  int res;
  nfc_baud_rate nbrs[3] = { NBR_106, NBR_212, NBR_424};

  CutTestContext *test_context = cut_get_current_test_context ();
  struct thread_data target_data = {
    .device = devices[TARGET],
    .cut_test_context = test_context,
  };
  
  struct thread_data initiator_data = {
    .device = devices[INITIATOR],
    .cut_test_context = test_context,
  };
  
  for (int i=0; i<3; i++) {
    initiator_data.nbr = nbrs[i];
    
    if ((res = pthread_create (&(threads[TARGET]), NULL, target_thread, &target_data)))
      cut_fail ("pthread_create() returned %d", res);
    if ((res = pthread_create (&(threads[INITIATOR]), NULL, initiator_thread, &initiator_data)))
      cut_fail ("pthread_create() returned %d", res);

    if ((res = pthread_join (threads[INITIATOR], (void *) &result[INITIATOR])))
      cut_fail ("pthread_join() returned %d", res);
    if ((res = pthread_join (threads[TARGET], (void *) &result[TARGET])))
      cut_fail ("pthread_join() returned %d", res);

    cut_assert_equal_int (0, result[INITIATOR], cut_message ("Unexpected initiator return code"));
    cut_assert_equal_int (0, result[TARGET], cut_message ("Unexpected target return code"));
  }
  
}