/*
    Output only format for Human Readable formats.

    Copyright (C) 2004 Scott Brynen, scott (at) brynen.com
    Copyright (C) 2002-2014 Robert Lipe, robertlipe+source@gpsbabel.org

    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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

#include <cstdint>
#include <ctime>                   // for localtime

#include <QtCore/QString>          // for QString, operator!=
#include <QtCore/QVector>          // for QVector
#include <QtCore/Qt>               // for CaseInsensitive

#include "defs.h"
#include "formspec.h"              // for FsChainFind, kFsGpx
#include "gbfile.h"                // for gbfprintf, gbfputs, gbfclose, gbfopen, gbfile
#include "jeeps/gpsmath.h"         // for GPS_Math_WGS84_To_UTM_EN
#include "src/core/datetime.h"     // for DateTime
#include "src/core/xmltag.h"       // for xml_findfirst, xml_attribute, xml_tag, fs_xml, xml_findnext


static gbfile* file_out;
static short_handle mkshort_handle;

static char* suppresssep = nullptr;
static char* txt_encrypt = nullptr;
static char* includelogs = nullptr;
static char* degformat = nullptr;
static char* altunits = nullptr;
static char* split_output = nullptr;
static int waypoint_count;
static QString output_name;

#define MYNAME "TEXT"

static
QVector<arglist_t> text_args = {
  {
    "nosep", &suppresssep,
    "Suppress separator lines between waypoints",
    nullptr, ARGTYPE_BOOL, ARG_NOMINMAX, nullptr
  },
  {
    "encrypt", &txt_encrypt,
    "Encrypt hints using ROT13", nullptr, ARGTYPE_BOOL, ARG_NOMINMAX, nullptr
  },
  {
    "logs", &includelogs,
    "Include groundspeak logs if present", nullptr, ARGTYPE_BOOL, ARG_NOMINMAX, nullptr
  },
  {
    "degformat", &degformat,
    "Degrees output as 'ddd', 'dmm'(default) or 'dms'", "dmm", ARGTYPE_STRING, ARG_NOMINMAX, nullptr
  },
  {
    "altunits", &altunits,
    "Units for altitude (f)eet or (m)etres", "m", ARGTYPE_STRING, ARG_NOMINMAX, nullptr
  },
  {
    "splitoutput", &split_output,
    "Write each waypoint in a separate file", nullptr, ARGTYPE_BOOL, ARG_NOMINMAX, nullptr
  },

};



static void
wr_init(const QString& fname)
{
  waypoint_count = 0;
  output_name = fname;
  if (!split_output) {
    file_out = gbfopen(fname, "w", MYNAME);
  }
  mkshort_handle = mkshort_new_handle();
}

static void
wr_deinit()
{
  if (!split_output) {
    gbfclose(file_out);
  }
  mkshort_del_handle(&mkshort_handle);
  output_name.clear();
}

static void
text_disp(const Waypoint* wpt)
{
  int32_t utmz;
  double utme, utmn;
  char utmzc;
  char* tmpout2;
  char* altout;

  waypoint_count++;

  if (split_output) {
    QString thisfname(output_name);
    thisfname += QString::number(waypoint_count);
    file_out = gbfopen(thisfname, "w", MYNAME);
  }

  GPS_Math_WGS84_To_UTM_EN(wpt->latitude, wpt->longitude,
                           &utme, &utmn, &utmz, &utmzc);
  char* tmpout1 = pretty_deg_format(wpt->latitude, wpt->longitude, degformat[2], " ", 0);
  if (wpt->altitude != unknown_alt) {
    xasprintf(&altout, " alt:%d", (int)((altunits[0]=='f')?METERS_TO_FEET(wpt->altitude):wpt->altitude));
  } else {
    altout = (char*) "";
  }
  xasprintf(&tmpout2, "%s (%d%c %6.0f %7.0f)%s", tmpout1, utmz, utmzc, utme, utmn, altout);
  gbfprintf(file_out, "%-16s  %59s\n",
            (global_opts.synthesize_shortnames) ? CSTR(mkshort_from_wpt(mkshort_handle, wpt)) : CSTR(wpt->shortname),
            tmpout2);
  xfree(tmpout2);
  xfree(tmpout1);
  if (altout[0]) {
    xfree(altout);
  }

  if (wpt->description != wpt->shortname) {
    gbfputs(wpt->description, file_out);
    if (!wpt->gc_data->placer.isEmpty()) {
      gbfputs(" by ", file_out);
      gbfputs(wpt->gc_data->placer, file_out);
    }
  }
  if (wpt->gc_data->terr) {
    gbfprintf(file_out, " - %s / %s - (%d%s / %d%s)\n",
              gs_get_cachetype(wpt->gc_data->type), gs_get_container(wpt->gc_data->container),
              (int)(wpt->gc_data->diff / 10), (wpt->gc_data->diff%10)?".5":"",
              (int)(wpt->gc_data->terr / 10), (wpt->gc_data->terr%10)?".5":"");
    if (!wpt->gc_data->desc_short.utfstring.isEmpty()) {
      char* stripped_html = strip_html(&wpt->gc_data->desc_short);
      gbfprintf(file_out, "\n%s\n", stripped_html);
      xfree(stripped_html);
    }
    if (!wpt->gc_data->desc_long.utfstring.isEmpty()) {
      char* stripped_html = strip_html(&wpt->gc_data->desc_long);
      gbfprintf(file_out, "\n%s\n", stripped_html);
      xfree(stripped_html);
    }
    if (!wpt->gc_data->hint.isEmpty()) {
      QString hint;
      if (txt_encrypt) {
        hint = rot13(wpt->gc_data->hint);
      } else {
        hint = wpt->gc_data->hint;
      }
      gbfprintf(file_out, "\nHint: %s\n", CSTR(hint));
    }
  } else if (!wpt->notes.isEmpty() && (wpt->description.isEmpty() || wpt->notes != wpt->description)) {
    gbfputs("\n", file_out);
    gbfputs(wpt->notes, file_out);
    gbfputs("\n", file_out);
  }

  if (includelogs) {
    const auto* fs_gpx = reinterpret_cast<fs_xml*>(wpt->fs.FsChainFind(kFsGpx));
    if (fs_gpx && fs_gpx->tag) {
      xml_tag* root = fs_gpx->tag;
      xml_tag* curlog = xml_findfirst(root, "groundspeak:log");
      while (curlog) {
        time_t logtime = 0;
        gbfprintf(file_out, "\n");

        xml_tag* logpart = xml_findfirst(curlog, "groundspeak:type");
        if (logpart) {
          gbfputs(logpart->cdata, file_out);
          gbfputs(" by ", file_out);
        }

        logpart = xml_findfirst(curlog, "groundspeak:finder");
        if (logpart) {
          gbfputs(logpart->cdata, file_out);
          gbfputs(" on ", file_out);
        }

        logpart = xml_findfirst(curlog, "groundspeak:date");
        if (logpart) {
          logtime = xml_parse_time(logpart->cdata).toTime_t();
          struct tm* logtm = localtime(&logtime);
          if (logtm) {
            gbfprintf(file_out,
                      "%4.4d-%2.2d-%2.2d\n",
                      logtm->tm_year+1900,
                      logtm->tm_mon+1,
                      logtm->tm_mday);
          }
        }

        logpart = xml_findfirst(curlog, "groundspeak:log_wpt");
        if (logpart) {
          double lat = xml_attribute(logpart->attributes, "lat").toDouble();
          double lon = xml_attribute(logpart->attributes, "lon").toDouble();
          char* coordstr = pretty_deg_format(lat, lon, degformat[2], " ", 0);
          gbfprintf(file_out, "%s\n", coordstr);
          xfree(coordstr);
        }

        logpart = xml_findfirst(curlog, "groundspeak:text");
        if (logpart) {
          QString encstr = xml_attribute(logpart->attributes, "encoded");
          bool encoded = !encstr.startsWith('F', Qt::CaseInsensitive);

          QString s;
          if (txt_encrypt && encoded) {
            s = rot13(logpart->cdata);
          } else {
            s = logpart->cdata;
          }

          gbfputs(s, file_out);
        }

        gbfprintf(file_out, "\n");
        curlog = xml_findnext(root, curlog, "groundspeak:log");
      }
    }
  }
  if (! suppresssep) {
    gbfprintf(file_out, "\n-----------------------------------------------------------------------------\n");
  } else {
    gbfprintf(file_out, "\n");
  }

  if (split_output) {
    gbfclose(file_out);
    file_out = nullptr;
  }
}

static void
data_write()
{
  if (! suppresssep && !split_output) {
    gbfprintf(file_out, "-----------------------------------------------------------------------------\n");
  }
  setshort_length(mkshort_handle, 6);
  waypt_disp_all(text_disp);
}


ff_vecs_t text_vecs = {
  ff_type_file,
  { ff_cap_write, ff_cap_none, ff_cap_none},
  nullptr,
  wr_init,
  nullptr,
  wr_deinit,
  nullptr,
  data_write,
  nullptr,
  &text_args,
  CET_CHARSET_ASCII, 0	/* CET-REVIEW */
  , NULL_POS_OPS,
  nullptr

};