/*
Copyright (C) 1999-2006 Id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.

This file is part of GtkRadiant.

GtkRadiant 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.

GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "autosave.h"

#include "os/file.h"
#include "os/path.h"
#include "cmdlib.h"
#include "stream/stringstream.h"
#include "gtkutil/messagebox.h"
#include "scenelib.h"
#include "mapfile.h"

#include "map.h"
#include "mainframe.h"
#include "qe3.h"
#include "preferences.h"


#if defined(WIN32)
#define PATH_MAX 260
#endif


bool DoesFileExist(const char* name, std::size_t& size)
{
  if(file_exists(name))
  {
    size += file_size(name);
    return true;
  }
  return false;
}

void Map_Snapshot()
{
  // we need to do the following
  // 1. make sure the snapshot directory exists (create it if it doesn't)
  // 2. find out what the lastest save is based on number
  // 3. inc that and save the map
  const char* path = Map_Name(g_map);
  const char* name = path_get_filename_start(path);

  StringOutputStream snapshotsDir(256);
  snapshotsDir << StringRange(path, name) << "snapshots";

  if(file_exists(snapshotsDir.c_str()) || Q_mkdir(snapshotsDir.c_str()))
  {
    std::size_t lSize = 0;
    StringOutputStream strNewPath(256);
    strNewPath << snapshotsDir.c_str() << '/' << name;

    StringOutputStream snapshotFilename(256);

    for(int nCount = 0; ; ++nCount)
    {
      // The original map's filename is "<path>/<name>.<ext>"
      // The snapshot's filename will be "<path>/snapshots/<name>.<count>.<ext>"
      const char* end = path_get_filename_base_end(strNewPath.c_str());
      snapshotFilename << StringRange(strNewPath.c_str(), end) << '.' << nCount << end;

      if(!DoesFileExist(snapshotFilename.c_str(), lSize))
      {
        break;
      }

      snapshotFilename.clear();
    }

    // save in the next available slot
    Map_SaveFile(snapshotFilename.c_str());

    if (lSize > 50 * 1024 * 1024) // total size of saves > 50 mb
    {
      globalOutputStream() << "The snapshot files in " << snapshotsDir.c_str() << " total more than 50 megabytes. You might consider cleaning up.";
    }
  }
  else
  {
    StringOutputStream strMsg(256);
    strMsg << "Snapshot save failed.. unabled to create directory\n" << snapshotsDir.c_str();
    gtk_MessageBox(GTK_WIDGET(MainFrame_getWindow()), strMsg.c_str());
  }
}
/*
===============
QE_CheckAutoSave

If five minutes have passed since making a change
and the map hasn't been saved, save it out.
===============
*/

bool g_AutoSave_Enabled = true;
int m_AutoSave_Frequency = 5;
bool g_SnapShots_Enabled = false;

namespace
{
  time_t s_start = 0;
  std::size_t s_changes = 0;
}

void AutoSave_clear()
{
  s_changes = 0;
}

scene::Node& Map_Node()
{
  return GlobalSceneGraph().root();
}

void QE_CheckAutoSave( void )
{
  if(!Map_Valid(g_map) || !ScreenUpdates_Enabled())
  {
    return;
  }

  time_t now;
  time(&now);

  if(s_start == 0 || s_changes == Node_getMapFile(Map_Node())->changes())
  {
    s_start = now;
  }

  if((now - s_start) > (60 * m_AutoSave_Frequency))
  {
    s_start = now;
    s_changes = Node_getMapFile(Map_Node())->changes();

    if (g_AutoSave_Enabled)
    {
      const char* strMsg = g_SnapShots_Enabled ? "Autosaving snapshot..." : "Autosaving...";
      globalOutputStream() << strMsg << "\n";
      //Sys_Status(strMsg);

      // only snapshot if not working on a default map
      if (g_SnapShots_Enabled && !Map_Unnamed(g_map))
      {
        Map_Snapshot();
      } 
      else
      {
        if(Map_Unnamed(g_map))
        {
          StringOutputStream autosave(256);
          autosave << g_qeglobals.m_userGamePath.c_str() << "maps/";
          Q_mkdir(autosave.c_str());
          autosave << "autosave.map";
          Map_SaveFile(autosave.c_str());
        }
        else
        {
          const char* name = Map_Name(g_map);
          const char* extension = path_get_filename_base_end(name);
          StringOutputStream autosave(256);
          autosave << StringRange(name, extension) << ".autosave" << extension;
          Map_SaveFile(autosave.c_str());
        }
      }
    }
    else
    {
      globalOutputStream() << "Autosave skipped...\n";
      //Sys_Status ("Autosave skipped...");
    }
  }
}

void Autosave_constructPreferences(PreferencesPage& page)
{
  GtkWidget* autosave_enabled = page.appendCheckBox("Autosave", "Enable Autosave", g_AutoSave_Enabled);
  GtkWidget* autosave_frequency = page.appendSpinner("Autosave Frequency (minutes)", m_AutoSave_Frequency, 1, 1, 60);
  Widget_connectToggleDependency(autosave_frequency, autosave_enabled);
  page.appendCheckBox("", "Save Snapshots", g_SnapShots_Enabled);
}
void Autosave_constructPage(PreferenceGroup& group)
{
  PreferencesPage page(group.createPage("Autosave", "Autosave Preferences"));
  Autosave_constructPreferences(page);
}
void Autosave_registerPreferencesPage()
{
  PreferencesDialog_addSettingsPage(FreeCaller1<PreferenceGroup&, Autosave_constructPage>());
}


#include "preferencesystem.h"
#include "stringio.h"

void Autosave_Construct()
{
  GlobalPreferenceSystem().registerPreference("Autosave", BoolImportStringCaller(g_AutoSave_Enabled), BoolExportStringCaller(g_AutoSave_Enabled));
  GlobalPreferenceSystem().registerPreference("AutosaveMinutes", IntImportStringCaller(m_AutoSave_Frequency), IntExportStringCaller(m_AutoSave_Frequency));
  GlobalPreferenceSystem().registerPreference("Snapshots", BoolImportStringCaller(g_SnapShots_Enabled), BoolExportStringCaller(g_SnapShots_Enabled));

  Autosave_registerPreferencesPage();
}

void Autosave_Destroy()
{
}