/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <glib-object.h>

#include "core/core-types.h"

#include "app_procs.h"
#include "batch.h"

#include "pdb/procedural_db.h"


static void batch_run_cmd  (Gimp              *gimp,
			    gchar             *cmd);
static void batch_pserver  (Gimp              *gimp,
			    gint               run_mode,
                            gint               flags,
                            gint               extra);


static ProcRecord *eval_proc;


void
batch_init (Gimp   *gimp,
            gchar **batch_cmds)
{
  gboolean read_from_stdin             = FALSE;
  gboolean perl_server_already_running = FALSE;
  gint     i;

  eval_proc = procedural_db_lookup (gimp, "extension_script_fu_eval");

  if (batch_cmds[0] && ! strcmp (batch_cmds[0], "-"))
    {
      batch_cmds[0] = "(extension-script-fu-text-console RUN-INTERACTIVE)";

      if (batch_cmds[1])
	batch_cmds[1] = NULL;

      read_from_stdin = TRUE;
    }

  for (i = 0; batch_cmds[i]; i++)
    {

      /* until --batch-interp=xxx or something similar is implemented 
       * and gimp-1.0 is not extinct use a shortcut to speed up starting the
       * perl-server tremendously. This is also fully compatible with 1.0.
       */
      {
        gint run_mode, flags, extra;

        if (sscanf (batch_cmds[i], "(extension%*[-_]perl%*[-_]server %i %i %i)", &run_mode, &flags, &extra) == 3)
          {
            if (!perl_server_already_running)
             {
               batch_pserver (gimp, run_mode, flags, extra);
               perl_server_already_running = 1;
             }
            continue;
          }
      }

      if (! eval_proc)
        {
          g_message ("script-fu not available: batch mode disabled\n");
          return;
        }

      batch_run_cmd (gimp, batch_cmds[i]);

      if (read_from_stdin)
	app_exit (FALSE);
    }
}


static void
batch_run_cmd (Gimp  *gimp,
	       gchar *cmd)
{
  Argument *args;
  Argument *vals;
  gint      i;

  if (g_ascii_strcasecmp (cmd, "(gimp-quit 0)") == 0)
    {
      app_exit (FALSE);
      exit (0);
    }

  args = g_new0 (Argument, eval_proc->num_args);
  for (i = 0; i < eval_proc->num_args; i++)
    args[i].arg_type = eval_proc->args[i].arg_type;

  args[0].value.pdb_int = 1;
  args[1].value.pdb_pointer = cmd;

  vals = procedural_db_execute (gimp, "extension_script_fu_eval", args);

  switch (vals[0].value.pdb_int)
    {
    case GIMP_PDB_EXECUTION_ERROR:
      g_print ("batch command: experienced an execution error.\n");
      break;
    case GIMP_PDB_CALLING_ERROR:
      g_print ("batch command: experienced a calling error.\n");
      break;
    case GIMP_PDB_SUCCESS:
      g_print ("batch command: executed successfully.\n");
      break;
    default:
      break;
    }
  
  procedural_db_destroy_args (vals, eval_proc->num_values);
  g_free(args);

  return;
}

static void
batch_pserver (Gimp *gimp,
	       gint  run_mode,
               gint  flags,
               gint  extra)
{
  ProcRecord *pserver_proc;
  Argument   *args;
  Argument   *vals;
  gint        i;

  pserver_proc = procedural_db_lookup (gimp, "extension_perl_server");

  if (!pserver_proc)
    {
      g_message ("extension_perl_server not available: unable to start the perl server\n");
      return;
    }

  args = g_new0 (Argument, pserver_proc->num_args);
  for (i = 0; i < pserver_proc->num_args; i++)
    args[i].arg_type = pserver_proc->args[i].arg_type;

  args[0].value.pdb_int = run_mode;
  args[1].value.pdb_int = flags;
  args[2].value.pdb_int = extra;

  vals = procedural_db_execute (gimp, "extension_perl_server", args);

  switch (vals[0].value.pdb_int)
    {
    case GIMP_PDB_EXECUTION_ERROR:
      g_print ("perl server: experienced an execution error.\n");
      break;
    case GIMP_PDB_CALLING_ERROR:
      g_print ("perl server: experienced a calling error.\n");
      break;
    case GIMP_PDB_SUCCESS:
      g_print ("perl server: executed successfully.\n");
      break;
    default:
      break;
    }
  
  procedural_db_destroy_args (vals, pserver_proc->num_values);
  g_free(args);

  return;
}