#include "epplet.h"

#define EPPLET_NAME 	"E-Exec"
#define EPPLET_VERSION 	"0.4"
#define EPPLET_INFO	"Exec a command given by the user"

#define MAX_HIST_LEN	15

Epplet_gadget textbox = NULL;
Epplet_gadget history_popup = NULL;
char *command_history[MAX_HIST_LEN];
int current_command = 0;
int num_commands = 0;

static void cb_close (void *data);
static void run_contents (void *data);
static void change_textbox (void *data);

static void
cb_close (void *data)
{
  Epplet_cleanup ();
  Epplet_unremember ();
  exit (0);
  data = NULL;
}

static void
run_contents (void *data)
{
  char *command = Epplet_textbox_contents (textbox);
  int i;

  if (command && strlen (command))
    {

      if (num_commands < MAX_HIST_LEN)
	command_history[num_commands++] = strdup (command);
      else
	{
	  free (command_history[0]);
	  Epplet_remove_popup_entry (history_popup, 1);

	  for (i = 0; i < MAX_HIST_LEN; i++)
	    command_history[i] = command_history[i + 1];

	  command_history[MAX_HIST_LEN - 1] = strdup (command);
	}

      current_command = num_commands;

      Epplet_add_popup_entry (history_popup, command, NULL, change_textbox,
			      strdup (command));
      Epplet_spawn_command (command);
      Epplet_reset_textbox (textbox);
    }

  return;
  data = NULL;
}

static void
change_textbox (void *data)
{
  char *s = (char *) data;

  Epplet_change_textbox (textbox, s);
}

static void
hist_last (void *data)
{
  if (current_command == 0)
    {
      current_command = num_commands;
      Epplet_reset_textbox (textbox);
    }
  else
    {
      Epplet_change_textbox (textbox, command_history[--current_command]);
    }

  return;
  data = NULL;
}

static void
hist_next (void *data)
{
  if (current_command == num_commands - 1)
    {
      current_command++;
      Epplet_reset_textbox (textbox);
      return;
    }
  else if (current_command >= num_commands)
    {
      current_command = 0;
    }
  else
    {
      current_command++;
    }
  Epplet_change_textbox (textbox, command_history[current_command]);

  return;
  data = NULL;
}

int
main (int argc, char *argv[])
{
  atexit (Epplet_cleanup);

  if ((argc > 1) && (!strcmp ("--proper-size", argv[1])))
    {
      Epplet_Init (EPPLET_NAME, EPPLET_VERSION, EPPLET_INFO, 6, 3, argc, argv,
		   0);

      Epplet_gadget_show (Epplet_create_label (-12, 2, "E-Exec", 2));

      textbox =
	Epplet_create_textbox (NULL, NULL, 2, 32, 92, 14, 2, run_contents,
			       NULL);
    }
  else
    {
      Epplet_Init (EPPLET_NAME, EPPLET_VERSION, EPPLET_INFO, 5, 3, argc, argv,
		   0);
      Epplet_gadget_show (Epplet_create_label (-12, 2, "E-Exec", 2));

      textbox =
	Epplet_create_textbox (NULL, NULL, 2, 32, 76, 14, 2, run_contents,
			       NULL);
    }
  Epplet_gadget_show (Epplet_create_button (NULL, NULL, 2, 2,
					    12, 12, "CLOSE", 0, NULL,
					    cb_close, NULL));

  Epplet_gadget_show (Epplet_create_button (NULL, NULL, 2, 16,
					    12, 12, "PREVIOUS", 0, NULL,
					    hist_last, NULL));

  Epplet_gadget_show (Epplet_create_button (NULL, NULL, 16, 16,
					    12, 12, "NEXT", 0, NULL,
					    hist_next, NULL));

  Epplet_gadget_show (Epplet_create_button (NULL, NULL, 60, 16,
					    12, 12, "PLAY", 0, NULL,
					    run_contents, NULL));

  history_popup = Epplet_create_popup ();
  Epplet_add_popup_entry (history_popup, "-NeverMind-", NULL, NULL, NULL);

  Epplet_gadget_show (Epplet_create_popupbutton (NULL, NULL, 30, 16,
						 12, 12, "ARROW_UP",
						 history_popup));

  Epplet_gadget_show (textbox);

  Epplet_show ();
  Epplet_Loop ();
  return 0;
}