/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/* GObject introspection: Typelib compiler
 * 
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later

 * Copyright (C) 2005 Matthias Clasen
 * Copyright (C) 2024 GNOME Foundation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include <errno.h>
#include <locale.h>
#include <string.h>

#include <glib.h>
#include <glib/gstdio.h>
#include <gio/gio.h>
#include <girepository.h>

#ifdef G_OS_WIN32
#include <io.h>
#include <fcntl.h>
#endif

#include "girmodule-private.h"
#include "girnode-private.h"
#include "girparser-private.h"

gchar **includedirs = NULL;
gchar **input = NULL;
gchar *output = NULL;
gchar *mname = NULL;
gchar **shlibs = NULL;
gboolean include_cwd = FALSE;
gboolean debug = FALSE;
gboolean verbose = FALSE;
gboolean show_version = FALSE;

static gboolean
write_out_typelib (gchar *prefix,
		   GITypelib *typelib)
{
  FILE *file;
  gsize written;
  GFile *file_obj;
  gchar *filename;
  GFile *tmp_file_obj;
  gchar *tmp_filename;
  GError *error = NULL;
  gboolean success = FALSE;

  if (output == NULL)
    {
      file = stdout;
      file_obj = NULL;
      filename = NULL;
      tmp_filename = NULL;
      tmp_file_obj = NULL;
#ifdef G_OS_WIN32
      setmode (fileno (file), _O_BINARY);
#endif
    }
  else
    {
      if (prefix)
	filename = g_strdup_printf ("%s-%s", prefix, output);  
      else
	filename = g_strdup (output);
      file_obj = g_file_new_for_path (filename);
      tmp_filename = g_strdup_printf ("%s.tmp", filename);
      tmp_file_obj = g_file_new_for_path (tmp_filename);
      file = g_fopen (tmp_filename, "wb");

      if (file == NULL)
	{
          g_fprintf (stderr, "failed to open '%s': %s\n",
                     tmp_filename, g_strerror (errno));
          goto out;
	}
    }

  written = fwrite (typelib->data, 1, typelib->len, file);
  if (written < typelib->len) {
    g_fprintf (stderr, "ERROR: Could not write the whole output: %s",
	       strerror(errno));
    goto out;
  }

  if (output != NULL)
    fclose (file);
  if (tmp_filename != NULL)
    {
      if (!g_file_move (tmp_file_obj, file_obj, G_FILE_COPY_OVERWRITE, NULL, NULL, NULL, &error))
        {
	  g_fprintf (stderr, "ERROR: failed to rename %s to %s: %s", tmp_filename, filename, error->message);
          g_clear_error (&error);
	  goto out;
        }
    }
  success = TRUE;
out:
  g_clear_object (&file_obj);
  g_clear_object (&tmp_file_obj);
  g_free (filename);
  g_free (tmp_filename);

  return success;
}

GLogLevelFlags logged_levels;

static void log_handler (const gchar *log_domain,
			 GLogLevelFlags log_level,
			 const gchar *message,
			 gpointer user_data)
{
  
  if (log_level & logged_levels)
    g_log_default_handler (log_domain, log_level, message, user_data);
}

static GOptionEntry options[] = 
{
  { "includedir", 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &includedirs, "include directories in GIR search path", NULL }, 
  { "output", 'o', 0, G_OPTION_ARG_FILENAME, &output, "output file", "FILE" }, 
  { "module", 'm', 0, G_OPTION_ARG_STRING, &mname, "module to compile", "NAME" }, 
  { "shared-library", 'l', 0, G_OPTION_ARG_FILENAME_ARRAY, &shlibs, "shared library", "FILE" }, 
  { "debug", 0, 0, G_OPTION_ARG_NONE, &debug, "show debug messages", NULL }, 
  { "verbose", 0, 0, G_OPTION_ARG_NONE, &verbose, "show verbose messages", NULL }, 
  { "version", 0, 0, G_OPTION_ARG_NONE, &show_version, "show program's version number and exit", NULL },
  { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &input, NULL, NULL },
  G_OPTION_ENTRY_NULL
};

int
main (int argc, char ** argv)
{
  GOptionContext *context;
  GError *error = NULL;
  GIIrParser *parser;
  GIIrModule *module;

  setlocale (LC_ALL, "");

  context = g_option_context_new ("");
  g_option_context_add_main_entries (context, options, NULL);
  g_option_context_parse (context, &argc, &argv, &error);
  g_option_context_free (context);

  if (error)
    {
      g_fprintf (stderr, "error parsing arguments: %s\n", error->message);

      g_error_free (error);

      return 1;
    }

  logged_levels = G_LOG_LEVEL_MASK & ~(G_LOG_LEVEL_MESSAGE|G_LOG_LEVEL_DEBUG);
  if (debug)
    logged_levels = logged_levels | G_LOG_LEVEL_DEBUG;
  if (verbose)
    logged_levels = logged_levels | G_LOG_LEVEL_MESSAGE;
  g_log_set_always_fatal (G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL);

  g_log_set_default_handler (log_handler, NULL);

  if (show_version)
    {
      g_printf ("gi-compile-repository %u.%u.%u\n",
                GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
      return 0;
    }

  if (!input) 
    { 
      g_fprintf (stderr, "no input files\n"); 

      return 1;
    }

  g_debug ("[parsing] start, %d includes", 
	   includedirs ? g_strv_length (includedirs) : 0);

  parser = gi_ir_parser_new ();

  gi_ir_parser_set_includes (parser, (const char*const*) includedirs);

  module = gi_ir_parser_parse_file (parser, input[0], &error);
  if (module == NULL) 
    {
      g_fprintf (stderr, "error parsing file %s: %s\n", 
		 input[0], error->message);
      
      return 1;
    }

  g_debug ("[parsing] done");

  g_debug ("[building] start");

  {
      GITypelib *typelib;

      if (shlibs)
	{
          if (module->shared_library)
	    g_free (module->shared_library);
          module->shared_library = g_strjoinv (",", shlibs);
	}

      g_debug ("[building] module %s", module->name);

      typelib = gi_ir_module_build_typelib (module);
      if (typelib == NULL)
	g_error ("Failed to build typelib for module '%s'\n", module->name);
      if (!gi_typelib_validate (typelib, &error))
	g_error ("Invalid typelib for module '%s': %s", 
		 module->name, error->message);

      if (!write_out_typelib (NULL, typelib))
	return 1;
      gi_typelib_free (typelib);
      typelib = NULL;
    }

  g_debug ("[building] done");

#if 0
  /* No point */
  gi_ir_parser_free (parser);
#endif  

  return 0; 
}