/*
   core/gameinterface.cc
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#include <stdlib.h>
#include <iostream>

#include "core/application.h"
#include "core/cvar.h"
#include "core/func.h"
#include "core/gameinterface.h"
#include "core/player.h"
#include "model/model.h"
#include "sys/sys.h"

namespace core
{

void func_list_model(std::string const &args)
{
	model::Model::list();
}

Player GameInterface::game_localplayer;

EntityControlable *localcontrol()
{ 
	if (game()->localplayer())
		return game()->localplayer()->control();
	else
		return 0;
	
}
Player *localplayer()
{ 
	return game()->localplayer();
}

GameInterface::GameInterface()
{
	clear();
	
	game_localplayer.clear();
	if (Cvar::sv_dedicated->value()) {
		game_localplayer.player_name.assign("Console");
	} else {
		game_localplayer.player_name.assign("Player");
		game_localplayer.update_info();
	}
	
	core::Func::add("list_model", (core::FuncPtr) func_list_model);
}

GameInterface::~GameInterface()
{
	core::Func::remove("list_model");

	game_localplayer.clear();

	clear();
}

// clear all game related objects
void GameInterface::clear()
{
	//con_debug << "Clearing game data\n";

	// remove all entities
	for (std::map<unsigned int, Entity*>::iterator it = Entity::registry.begin(); it != Entity::registry.end(); it++) {
		delete (*it).second;
	}
	Entity::registry.clear();

	// remove all game functions
	for (std::map<std::string, Func*>::iterator it = Func::registry.begin(); it != Func::registry.end(); it++) {
		if ( ((*it).second->flags() & Func::Game) == Func::Game) {
			delete (*it).second;
			Func::registry.erase(it);
		}
	}

	// remove all game cvars
	for (std::map<std::string, Cvar*>::iterator it = Cvar::registry.begin(); it != Cvar::registry.end(); it++) {
		if ( ((*it).second->flags() & Cvar::Game) == Cvar::Game) {
			delete (*it).second;
			Cvar::registry.erase(it);
		}
	}

	// remove all models
	model::Model::clear();

	game_previousframetime = 0;
	game_serverframetime = 0;
	game_clientframetime = 0;
	game_timestep = 0;
	game_frames = 0;
}

void GameInterface::reset_clientstate(float servertime)
{
	game_timestep =  (servertime - game_serverframetime);

	if (game_timestep < 0)
		game_timestep = 0;

	game_previousframetime = game_serverframetime;
	game_serverframetime = servertime;
	game_clientframetime = game_previousframetime;

	std::map<unsigned int, core::Entity *>::iterator it;
	for (it=core::Entity::registry.begin(); it != core::Entity::registry.end(); it++) {
		
		core::Entity *entity = (*it).second;

		if (entity->state() && !(entity->flags() & Entity::Static))
			entity->state()->assign(entity);
	}
	
	game_frames = 0;
}

void GameInterface::update_clientstate()
{
	game_frames++;
	game_clientframetime += game_timestep;

	if (game_clientframetime > game_serverframetime)
		game_clientframetime = game_serverframetime;
}

float GameInterface::timeoffset() {
	float d = game_serverframetime - game_previousframetime;
	if (d < 0)
		d = 1;
	float t = game_serverframetime - game_clientframetime;

	return t/d;
}

}