//  This may look like C code, but it is really -*- C++ -*-

//  ------------------------------------------------------------------
//  The Goldware Library
//  Copyright (C) 1990-1999 Odinn Sorensen
//  Copyright (C) 1999-2000 Alexander S. Aganichev
//  ------------------------------------------------------------------
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Library General Public
//  License as published by the Free Software Foundation; either
//  version 2 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
//  Library General Public License for more details.
//
//  You should have received a copy of the GNU Library 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
//  ------------------------------------------------------------------
//  $Id$
//  ------------------------------------------------------------------
//  Allows user to select a file name.
//  ------------------------------------------------------------------

#include <gctype.h>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <gmemdbg.h>
#include <gfilutil.h>
#include <gwildmat.h>
#include <gwinall.h>
#include <gfilutil.h>
#include <gdirposx.h>
#include <gstrall.h>


//  ------------------------------------------------------------------

static bool path_in_title, case_sensitive;
static IfcpCP open_function = NULL;
static char* cwdp;
static char* tcwdp;
static char* namextp;


//  ------------------------------------------------------------------
//  this function is the compare function for std::sort()

static bool compare(const std::string str1, const std::string str2)
{
  // Sort with directories first
  bool dir1 = !!strchr(str1.c_str(), GOLD_SLASH_CHR);
  bool dir2 = !!strchr(str2.c_str(), GOLD_SLASH_CHR);
  if (dir1 && !dir2) return true;
  if (!dir1 && dir2) return false;

  std::string s1 = dir1 ? str1.substr(0, str1.length()-1) : str1;
  std::string s2 = dir2 ? str2.substr(0, str2.length()-1) : str2;

  int cmp;
  if (case_sensitive)
    cmp = strcmp(s1.c_str(), s2.c_str());
  else
  {
    cmp = stricmp(s1.c_str(), s2.c_str());
    if (cmp == 0)
      cmp = strcmp(s1.c_str(), s2.c_str());
  }

  return (cmp < 0);
}


//  ------------------------------------------------------------------
//  this function displays the title on the pick window border

static void disp_title() {

  char buf[sizeof(Path)+2];

  if(path_in_title or open_function) {
    strcpy(buf, " ");
    PathCopy(buf+1, cwdp);
    strcat(buf, namextp);
    strcat(buf, " ");
  }

  if(path_in_title) {
    wtitle(buf, TCENTER, gwin.active->battr);
  }

  if(open_function) {
    (*open_function)(buf);
  }
}


//  ------------------------------------------------------------------

bool wpickfile(int srow, int scol, int erow, int ecol, int btype, vattr bordattr, vattr winattr, vattr barattr, bool title, std::string &filespec, IfcpCP open, bool casesens)
{
  Path cwd, dir, namext, tcwd, path, spec;

  cwdp = cwd;
  tcwdp = tcwd;
  namextp = namext;

  // set static variables
  open_function = open;
  path_in_title = title;
  case_sensitive = casesens;

  // save current working directory
  getcwd(tcwd, GMAXPATH);

  // if drive was specified, change to it
  char* q = strxcpy(spec, filespec.c_str(), sizeof(Path));

  // split up input filespec into its current
  // working directory and filename/extension
  char* r = strrchr(q, GOLD_SLASH_CHR);
  #if defined(__HAVE_DRIVES__)
  if(r == NULL)
    if(q[1] == ':')
      r = q + 1;
  #endif
  if(r == NULL) {
    *dir = NUL;
    strcpy(namext, q);
  }
  else {
    strins(" ", ++r, 0);
    *r++ = NUL;
    strcpy(dir, q);
    strcpy(namext, r);
  }

  bool finished;
  int picked;

  do
  {
    // if directory was specified, change to it
    if (*dir && gchdir(dir))
    {
      gchdir(tcwdp);
      return false;
    }

    // get current working directory
    getcwd(cwd, GMAXPATH);
    strcpy(dir, cwd);

    // find all directories plus all files matching input filespec in
    // current directory, allocating an array element for each
    picked = -1;
    gposixdir d(dir);
    gstrarray strarr;
    const gdirentry *de;

    if (d.ok)
    {
      while((de = d.nextentry()) != NULL)
      {
        const char* name = NULL;
        if (de->is_directory())
        {
          if(de->name != ".") {
            strxmerge(path, sizeof(Path), de->name.c_str(), GOLD_SLASH_STR, NULL);
            name = path;
          }
        }
        else if(de->is_file())
        {
          if(case_sensitive ? gwildmat(de->name.c_str(), namext) : gwildmati(de->name.c_str(), namext))
            name = de->name.c_str();
        }

        if (name) strarr.push_back(name);
      }
    }

    // sort files in array by swapping their pointers
    std::sort(strarr.begin(), strarr.end(), compare);

    // let user pick file
    if (strarr.size())
    {
      picked = wpickstr(srow, scol, erow, ecol, btype, bordattr, winattr, barattr, strarr, 0, disp_title);
    }

    if (picked == -1 or !strarr.size())
    {
      gchdir(tcwdp);
      return false;
    }

    // see if a directory was selected. if so save
    // directory name, otherwise build whole path name
    const char *slash = strchr(strarr[picked].c_str(), GOLD_SLASH_CHR);
    if (slash)
    {
      finished = false;
      strcpy(dir, strarr[picked].c_str());
      r = strrchr(dir, GOLD_SLASH_CHR);
      if (r) *r = NUL;
    }
    else {
      finished = true;
      PathCopy(filespec, cwd);
      filespec += strarr[picked].c_str();
    }

    strarr.clear();
  }
  while(not finished);  // if a directory was selected, go back and do again

  gchdir(tcwd); // change back to current drive and directory
  return true;  // return normally
}


//  ------------------------------------------------------------------