//
// FLTK native file chooser widget : Zenity version
//
// Copyright 2021-2022 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
//     https://www.fltk.org/bugs.php
//

#include <config.h>
#include "Fl_Native_File_Chooser_Zenity.H"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>


// Fl_Zenity_Native_File_Chooser_Driver : file chooser based on the "zenity" command

bool Fl_Zenity_Native_File_Chooser_Driver::did_find_zenity = false;
bool Fl_Zenity_Native_File_Chooser_Driver::have_looked_for_zenity = false;


Fl_Zenity_Native_File_Chooser_Driver::Fl_Zenity_Native_File_Chooser_Driver(int val) :  Fl_Kdialog_Native_File_Chooser_Driver(val) {
}


char *Fl_Zenity_Native_File_Chooser_Driver::build_command() {
  const char *option;
  int l;
  switch (_btype) {
    case Fl_Native_File_Chooser::BROWSE_DIRECTORY:
    case Fl_Native_File_Chooser::BROWSE_SAVE_DIRECTORY:
      option = "--file-selection --directory";
      break;

    case Fl_Native_File_Chooser::BROWSE_SAVE_FILE:
      if (options() & Fl_Native_File_Chooser::SAVEAS_CONFIRM)
        option = "--file-selection --save --confirm-overwrite";
      else
        option = "--file-selection --save";
      break;

    case Fl_Native_File_Chooser::BROWSE_MULTI_FILE:
      option = "--file-selection --multiple";
      break;

    default:
      option = "--file-selection";
  }
  char *preset = NULL;
  if (_preset_file) {
    l = strlen(_preset_file) + 15;
    preset = new char[l];
    snprintf(preset, l, "--filename='%s'", _preset_file);
  }
  else if (_directory) {
    // This doesn't actually seem to do anything, but supply it anyway.
    l = strlen(_directory) + 15;
    preset = new char[l];
    snprintf(preset, l, "--filename '%s'", _directory);
  }
  int lcommand = 1000;
  char *command = new char[lcommand];
  strcpy(command, "zenity ");
  if (_title) {
    l = strlen(command);
    snprintf(command+l, lcommand-l, " --title '%s'", _title);
  }
  l = strlen(command);
  snprintf(command+l, lcommand-l, " %s %s ", option, preset ? preset : "");
  delete[] preset;
  if (_parsedfilt) {
    char *p = strtok(_parsedfilt, "\n");
    while (p) {
      char *op = strchr(p, '(');
      l = strlen(command);
      snprintf(command+l, lcommand-l, " --file-filter='%s|", p);
      char *cp = strchr(p, ')');
      *cp = 0;
      char *ob = strchr(op+1, '[');
      if (ob) { // process [xyz] patterns
        *ob = 0;
        char *cb = strchr(ob+1, ']');
        char aux[100];
        for (char *q = ob+1; q < cb; q++) {
          strcpy(aux, op+1);
          int la = strlen(aux);
          aux[la++] = *q;
          if (cb < cp-1) { strcpy(aux+la, cb+1); la += strlen(cb+1); }
          aux[la] = 0;
          l = strlen(command);
          snprintf(command+l, lcommand-l, " %s", aux);
        }
        strcat(command, "'");
      } else {
        l = strlen(command);
        snprintf(command+l, lcommand-l, "%s'", op+1);
      }
      p = strtok(NULL, "\n");
    }
  }
  strcat(command, " 2> /dev/null"); // get rid of stderr output
//puts(command);
  return command;
}