//
// PPD file compiler main entry for the CUPS PPD Compiler in libppd.
//
// Copyright 2007-2014 by Apple Inc.
// Copyright 2002-2007 by Easy Software Products.
//
// Licensed under Apache License v2.0.  See the file "LICENSE" for more
// information.
//

//
// Include necessary headers...
//

#include <ppd/ppdc-private.h>
#include <ppd/libcups2-private.h>
#include <cups/array.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>


//
// Local globals...
//

const char *progname;


//
// Local functions...
//

static void	usage(void);


//
// 'main()' - Main entry for the PPD compiler.
//

int					// O - Exit status
main(int  argc,				// I - Number of command-line arguments
     char *argv[])			// I - Command-line arguments
{
  int			i, j;		// Looping vars
  ppdcCatalog		*catalog;	// Message catalog
  const char		*outdir;	// Output directory
  ppdcSource		*src;		// PPD source file data
  ppdcDriver		*d;		// Current driver
  cups_file_t		*fp;		// PPD file
  char			*opt,		// Current option
			*value,		// Value in option
			*outname,	// Output filename
			make_model[1024],
					// Make and model
			pcfilename[1024],
					// Lowercase pcfilename
			filename[2048];	// PPD filename
  int			comp,		// Compress
			do_test,	// Test PPD files
			single_language,// Generate single-language files
			use_model_name,	// Use ModelName for filename
			verbose;	// Verbosity
  ppdcLineEnding	le;		// Line ending to use
  ppdcArray		*locales;	// List of locales
  cups_array_t		*filenames;	// List of generated filenames


  // Scan the command-line...
  catalog         = NULL;
  comp            = 0;
  do_test         = 0;
  le              = PPDC_LFONLY;
  locales         = NULL;
  outdir          = "ppd";
  single_language = 0;
  src             = new ppdcSource();
  use_model_name  = 0;
  verbose         = 0;
  filenames       = cupsArrayNew((cups_array_cb_t)strcasecmp, NULL, NULL, 0, NULL, NULL);

  progname        = strrchr(argv[0], '/');
  if (progname)
    progname ++;
  else
    progname = argv[0];

  for (i = 1; i < argc; i ++)
    if (argv[i][0] == '-')
    {
      for (opt = argv[i] + 1; *opt; opt ++)
        switch (*opt)
	{
          case 'D' :			// Define variable
	      i ++;
	      if (i >= argc)
	        usage();

              if ((value = strchr(argv[i], '=')) != NULL)
	      {
	        *value++ = '\0';

	        src->set_variable(argv[i], value);
	      }
	      else
	        src->set_variable(argv[i], "1");
              break;

          case 'I' :			// Include directory...
	      i ++;
	      if (i >= argc)
        	usage();

              if (verbose > 1)
	        fprintf(stdout,
			_("%s: Adding include directory \"%s\".\n"),
			progname, argv[i]);

	      ppdcSource::add_include(argv[i]);
	      break;

	  case 'c' :			// Message catalog...
	      i ++;
              if (i >= argc)
                usage();

              if (verbose > 1)
	        fprintf(stdout,
			_("%s: Loading messages from \"%s\".\n"),
			progname, argv[i]);

              if (!catalog)
	        catalog = new ppdcCatalog("en");

              if (catalog->load_messages(argv[i]))
	      {
        	fprintf(stderr,
			_("%s: Unable to load localization file "
			  "\"%s\" - %s\n"), progname, argv[i], strerror(errno));
                return (1);
	      }
	      break;

          case 'd' :			// Output directory...
	      i ++;
	      if (i >= argc)
        	usage();

              if (verbose > 1)
	        fprintf(stdout,
			_("%s: Writing PPD files to directory "
			  "\"%s\".\n"), progname, argv[i]);

	      outdir = argv[i];
	      break;

          case 'l' :			// Language(s)...
	      i ++;
	      if (i >= argc)
        	usage();

              if (strchr(argv[i], ','))
	      {
	        // Comma-delimited list of languages...
		char	temp[1024],	// Copy of language list
			*start,		// Start of current locale name
			*end;		// End of current locale name


		locales = new ppdcArray();

		strncpy(temp, argv[i], sizeof(temp) - 1);
		for (start = temp; *start; start = end)
		{
		  if ((end = strchr(start, ',')) != NULL)
		    *end++ = '\0';
		  else
		    end = start + strlen(start);

                  if (end > start)
		    locales->add(new ppdcString(start));
		}
	      }
	      else
	      {
	        single_language = 1;

        	if (verbose > 1)
	          fprintf(stdout,
			  _("%s: Loading messages for locale "
			    "\"%s\".\n"), progname, argv[i]);

        	if (catalog)
	          catalog->release();

        	catalog = new ppdcCatalog(argv[i]);

		if (catalog->messages->count == 0 && strcmp(argv[i], "en"))
		{
        	  fprintf(stderr,
			  _("%s: Unable to find localization for "
			    "\"%s\" - %s\n"), progname, argv[i],
			  strerror(errno));
                  return (1);
		}
	      }
	      break;

          case 'm' :			// Use ModelName for filename
	      use_model_name = 1;
	      break;

          case 't' :			// Test PPDs instead of generating them
	      do_test = 1;
	      break;

          case 'v' :			// Be verbose...
	      verbose ++;
	      break;

          case 'z' :			// Compress files...
	      comp = 1;
	      break;

	  case '-' :			// --option
	      if (!strcmp(opt, "-lf"))
	      {
		le  = PPDC_LFONLY;
		opt += strlen(opt) - 1;
		break;
	      }
	      else if (!strcmp(opt, "-cr"))
	      {
		le  = PPDC_CRONLY;
		opt += strlen(opt) - 1;
		break;
	      }
	      else if (!strcmp(opt, "-crlf"))
	      {
		le  = PPDC_CRLF;
		opt += strlen(opt) - 1;
		break;
	      }

	  default :			// Unknown
	      usage();
	      break;
	}
    }
    else
    {
      // Open and load the driver info file...
      if (verbose > 1)
        fprintf(stdout,
		_("%s: Loading driver information file \"%s\".\n"),
		progname, argv[i]);

      src->read_file(argv[i]);
    }


  if (src->drivers->count > 0)
  {
    // Create the output directory...
    if (mkdir(outdir, 0777))
    {
      if (errno != EEXIST)
      {
	fprintf(stderr,
		_("%s: Unable to create output directory %s: %s\n"),
	        progname, outdir, strerror(errno));
        return (1);
      }
    }

    // Write PPD files...
    for (d = (ppdcDriver *)src->drivers->first();
         d;
	 d = (ppdcDriver *)src->drivers->next())
    {
      if (do_test)
      {
        // Test the PPD file for this driver...
	int	pid,			// Process ID
		fds[2];			// Pipe file descriptors


        if (pipe(fds))
	{
	  fprintf(stderr,
		  _("%s: Unable to create output pipes: %s\n"),
		  progname, strerror(errno));
	  return (1);
	}

	if ((pid = fork()) == 0)
	{
	  // Child process comes here...
	  dup2(fds[0], 0);

	  close(fds[0]);
	  close(fds[1]);

	  execlp("cupstestppd", "cupstestppd", "-", (char *)0);

	  fprintf(stderr,
		  _("%s: Unable to execute cupstestppd: %s\n"),
		  progname, strerror(errno));
	  return (errno);
	}
	else if (pid < 0)
	{
	  fprintf(stderr, _("%s: Unable to execute cupstestppd: %s\n"),
		  progname, strerror(errno));
	  return (errno);
	}

	close(fds[0]);
	fp = cupsFileOpenFd(fds[1], "w");
      }
      else
      {
	// Write the PPD file for this driver...
	if (use_model_name)
	{
	  if (!strncasecmp(d->model_name->value, d->manufacturer->value,
	                   strlen(d->manufacturer->value)))
	  {
	    // Model name already starts with the manufacturer...
            outname = d->model_name->value;
	  }
	  else
	  {
	    // Add manufacturer to the front of the model name...
	    snprintf(make_model, sizeof(make_model), "%s %s",
	             d->manufacturer->value, d->model_name->value);
	    outname = make_model;
	  }
	}
	else if (d->file_name)
	  outname = d->file_name->value;
	else
	  outname = d->pc_file_name->value;

	if (strstr(outname, ".PPD"))
	{
	  // Convert PCFileName to lowercase...
	  for (j = 0;
	       outname[j] && j < (int)(sizeof(pcfilename) - 1);
	       j ++)
	    pcfilename[j] = (char)tolower(outname[j] & 255);

	  pcfilename[j] = '\0';
	}
	else
	{
	  // Leave PCFileName as-is...
	  strncpy(pcfilename, outname, sizeof(pcfilename));
	}

	// Open the PPD file for writing...
	if (comp)
	  snprintf(filename, sizeof(filename), "%s/%s.gz", outdir, pcfilename);
	else
	  snprintf(filename, sizeof(filename), "%s/%s", outdir, pcfilename);

        if (cupsArrayFind(filenames, filename))
	  fprintf(stderr,
		  _("%s: Warning - overlapping filename \"%s\".\n"),
		  progname, filename);
	else
	  cupsArrayAdd(filenames, strdup(filename));

	fp = cupsFileOpen(filename, comp ? "w9" : "w");
	if (!fp)
	{
	  fprintf(stderr,
		  _("%s: Unable to create PPD file \"%s\" - %s.\n"),
		  progname, filename, strerror(errno));
	  return (1);
	}

	if (verbose)
	  fprintf(stdout, _("%s: Writing %s.\n"), progname, filename);
      }

      //
      // Write the PPD file...
      //

      ppdcArray *templocales = locales;

      if (!templocales && !single_language)
      {
	templocales = new ppdcArray();
	for (ppdcCatalog *tempcatalog = (ppdcCatalog *)src->po_files->first();
	     tempcatalog;
	     tempcatalog = (ppdcCatalog *)src->po_files->next())
	{
	  tempcatalog->locale->retain();
	  templocales->add(tempcatalog->locale);
	}
      }

      if (d->write_ppd_file(fp, catalog, templocales, src, le))
      {
	cupsFileClose(fp);
	return (1);
      }

      if (templocales && templocales != locales)
        templocales->release();

      cupsFileClose(fp);
    }
  }
  else
    usage();

  // Delete the printer driver information...
  src->release();

  // Message catalog...
  if (catalog)
    catalog->release();

  // Return with no errors.
  return (0);
}


//
// 'usage()' - Show usage and exit.
//

static void
usage(void)
{
  fprintf(stdout, _("Usage: %s [options] filename.drv [ ... "
		    "filenameN.drv ]\n"), progname);
  fprintf(stdout, _("Options:\n"));
  fprintf(stdout, _("  -D name=value           Set named variable to "
		    "value.\n"));
  fprintf(stdout, _("  -I include-dir          Add include directory to "
		    "search path.\n"));
  fprintf(stdout, _("  -c catalog.po           Load the specified "
		    "message catalog.\n"));
  fprintf(stdout, _("  -d output-dir           Specify the output "
		    "directory.\n"));
  fprintf(stdout, _("  -l lang[,lang,...]      Specify the output "
		    "language(s) (locale).\n"));
  fprintf(stdout, _("  -m                      Use the ModelName value "
		    "as the filename.\n"));
  fprintf(stdout, _("  -t                      Test PPDs instead of "
		    "generating them.\n"));
  fprintf(stdout, _("  -v                      Be verbose.\n"));
  fprintf(stdout, _("  -z                      Compress PPD files using "
		    "GNU zip.\n"));
  fprintf(stdout, _("  --cr                    End lines with CR (Mac "
		    "OS 9).\n"));
  fprintf(stdout, _("  --crlf                  End lines with CR + LF "
		    "(Windows).\n"));
  fprintf(stdout, _("  --lf                    End lines with LF "
		    "(UNIX/Linux/macOS).\n"));

  exit(1);
}