// Filename: panda3d.h
// Created by:  drose (30Jun09)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University.  All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license.  You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////

#ifndef PANDA3D_H
#define PANDA3D_H

// This program must link with Panda for HTTPClient support.  This
// means it probably should be built with LINK_ALL_STATIC defined, so
// we won't have to deal with confusing .dll or .so files that might
// compete on the disk with the dynamically-loaded versions.  There's
// no competition in memory address space, though, because
// p3d_plugin--the only file we dynamically link in--doesn't itself
// link with Panda.

#include "pandabase.h"
#include "p3d_plugin.h"
#include "httpChannel.h"
#include "ramfile.h"
#include "fileSpec.h"
#include "pset.h"

////////////////////////////////////////////////////////////////////
//       Class : Panda3D
// Description : A standalone program that invokes the Panda3D plugin
//               to launch .p3d files.
////////////////////////////////////////////////////////////////////
class Panda3D {
public:
  Panda3D();

  int run(int argc, char *argv[]);

private:
  bool get_plugin(const string &download_url, const string &this_platform,
                  bool force_download);
  bool read_contents_file(Filename contents_filename, 
                          const string &download_url,
                          const string &this_platform);
  bool get_core_api(const Filename &contents_filename, 
                    const string &download_url, const string &this_platform,
                    TiXmlElement *xpackage);
  void run_getters();
  void handle_request(P3D_request *request);
  void make_parent_window(P3D_window_handle &parent_window, 
                          int win_width, int win_height);

  P3D_instance *create_instance(const string &arg, P3D_window_type window_type,
                                int win_x, int win_y, int win_width, 
                                int win_height,
                                P3D_window_handle parent_window,
                                const Filename &output_filename);
  void delete_instance(P3D_instance *instance);

  void usage();
  bool parse_int_pair(char *arg, int &x, int &y);

private:
  string _root_dir;
  FileSpec _core_api_dll;

  typedef pset<P3D_instance *> Instances;
  Instances _instances;

  // This nested class keeps track of active URL requests.
  class URLGetter {
  public:
    URLGetter(P3D_instance *instance, int unique_id,
              const URLSpec &url, const string &post_data);
    
    bool run();
    inline P3D_instance *get_instance();
    
  private:
    P3D_instance *_instance;
    int _unique_id;
    URLSpec _url;
    string _post_data;
    
    PT(HTTPChannel) _channel;
    Ramfile _rf;
    size_t _bytes_sent;
  };
  
  typedef pset<URLGetter *> URLGetters;
  URLGetters _url_getters;
};

#include "panda3d.I"

#endif