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

#include <SDL/SDL.h>

#include <iostream>
#include <cmath>
#include <iomanip>

#include "audio/audio.h"
#include "audio/sources.h"
#include "client/client.h"
#include "client/video.h"
#include "client/input.h"
#include "client/view.h"
#include "core/core.h"
#include "core/loader.h"
#include "core/zone.h"
#include "render/render.h"
#include "ui/ui.h"

namespace client 
{

core::Cvar *cl_framerate = 0;
core::Cvar *cl_frametime = 0;

Client app;

//--- public ------------------------------------------------------


Client *client()
{
	return &app;
}

void run(int count, char **arguments)
{
	std::cout << core::name() << " " << core::version() << std::endl;

	for (int i =0; i < count; i++)
		std::cout << arguments[i] << " ";
	std::cout << std::endl;

	app.init(count, arguments);
	app.run();
	app.shutdown();
}

//--- private -----------------------------------------------------

void Client::quit(int status)
{
	SDL_Quit();
	core::Application::quit(status);
}

void Client::init(int count, char **arguments)
{
	client_view = 0;
	con_print << "^BInitializing client..." << std::endl;

	// initialize core
	core::Cvar::sv_private = core::Cvar::set("sv_private", "0");
	core::Application::init(count, arguments);

	// engine variables
	cl_framerate = core::Cvar::get("cl_framerate", "125", core::Cvar::Archive);
	cl_framerate->set_info("[int] client framerate in frames/sec");

	// player info variables
	core::Cvar *cvar = 0;

	cvar = core::Cvar::get("cl_name", "Player", core::Cvar::Archive | core::Cvar::Info);
	cvar->set_info("[str] player name");

	cvar = core::Cvar::get("cl_color", "1.0 1.0 1.0", core::Cvar::Archive | core::Cvar::Info);
	cvar->set_info("[r g b] player primary color");

	cvar = core::Cvar::get("cl_colorsecond", "1.0 1.0 1.0", core::Cvar::Archive | core::Cvar::Info);
	cvar->set_info("[r g b] player secondary color");

	cvar = core::Cvar::get("rconpassword", "", core::Cvar::Archive | core::Cvar::Info);
	cvar->set_info("[string] password for remote console access");

	// initialize SDL, but do not initialize any subsystems
	SDL_Init(0);

	// initialize user interface
	ui::init();
	client_view = new View(ui::root());

	// Initialize the video subsystem
	if (!video::init()) {
		quit(1);
	}

	// initialize input
	input::init();

	// initialize audio
	audio::init();
	
	// add engine functions
	core::Func *func = 0;

	func = core::Func::add("r_restart", Client::func_r_restart);
	func->set_info("restart render subsystem");
	
	func = core::Func::add("ui_chat", Client::func_ui_chat);
	func->set_info("toggle chat window");

	func = core::Func::add("ui_chatsmall", Client::func_ui_chatsmall);
	func->set_info("toggle small chat window");

	func = core::Func::add("snd_restart", Client::func_snd_restart);
	func->set_info("restart audio subsystem");

	previous_timestamp = 0;
}

void Client::run()
{
	con_print << "^BRunning client..." << std::endl;

	// default framerate 125fps, 8 milliseconds
	Uint32 client_frame_lenght = 8;
	
	Uint32 client_current_timestamp = 0;
	Uint32 client_previous_timestamp = 0;
		
	while (true) {
		// current time in microseconds
		client_current_timestamp = SDL_GetTicks();
			
		// calculate the desired frame length
		if (cl_framerate->value() < 0) {
			(*cl_framerate) = 0.0f;
		} else if (cl_framerate->value() > 1000.0f) {
			(*cl_framerate) = 1000.0f;
		}

		if (cl_framerate->value()) {
			client_frame_lenght = (Uint32) roundf(1000.0f / cl_framerate->value());
		} else {
			client_frame_lenght = 0;
		}
		
		// only advance per microsecond frame
		Uint32 d = client_current_timestamp - client_previous_timestamp;
		if ((d > 0)) {
			if (d >= client_frame_lenght) {
				frame(client_current_timestamp);	
				client_previous_timestamp = client_current_timestamp;
			} else {
				SDL_Delay(client_frame_lenght - d);
			}
		} else {
			SDL_Delay(1);
		}
	}

}

void Client::frame(unsigned long timestamp)
{
	input::frame();

	core::Application::frame(timestamp);

	if (!connected()) {
		std::string module_label(core::Loader::label());

		// load the intro if nothing is running
		if (load("intro")) {
			connect("");
			if (module_label.size())
				load(module_label);
		}
		// show the console if everything fails
		if (!connected() && !ui::console()->visible()) {
			ui::console()->toggle();
		}
	} else if (!ui::root()->active()) {

		// show the main menu on non-interactive modules
		if (!core::game()->interactive()) {
			ui::root()->show_menu("main");

		// show the join menu when player does not control an entity
		} else if (core::game()->time() && !core::localcontrol()) {
			ui::root()->show_menu("join");

		// show the view menu when docked
		} else if (core::localcontrol() && core::localplayer()->view()) {
			ui::root()->show_menuview("main");
		}

	} else {
		if (core::localcontrol()) {
			// hide join menu
			if (ui::root()->active()->label().compare("join") == 0) {
				ui::root()->hide_menu();
			
			// hide view menu
			} else if (!core::localplayer()->view() && (ui::root()->active()->label().compare("view") == 0)) {
				ui::root()->hide_menu();
			}
		}
	}

	video::frame((float)(timestamp - previous_timestamp) / 1000.0f);
	
	previous_timestamp = timestamp;
}

void Client::shutdown()
{
	con_print << "^BShutting down client..." << std::endl;

	if (connected()) disconnect();

	core::Func::remove("r_restart");
	core::Func::remove("ui_chat");
	core::Func::remove("ui_chatsmall");
	core::Func::remove("snd_restart");

	audio::shutdown();

	input::shutdown();

	video::shutdown();

	ui::shutdown();

	core::Application::shutdown();

	quit(0);
}

/* -- notifications from core::Application ------------------------- */

void Client::notify_connect()
{
	view()->notify()->clear();
	view()->chat()->clear();
	ui::root()->hide_menu();
}

void Client::notify_disconnect()
{
	audio::reset();
	render::reset();
	input::reset();

	view()->notify()->clear();
	view()->chat()->clear();
}

void Client::notify_zonechange()
{
	render::unload();
}

void Client::notify_sound(const char *name)
{
	audio::play(name);
}

void Client::notify_message(const char *message)
{
	std::string text(message);
	notify_message(core::Message::Info, text);
}

void Client::notify_message(const std::string &message)
{
	notify_message(core::Message::Info, message);
}

void Client::notify_message(const core::Message::Channel channel, const std::string &message)
{

	switch(channel) {

		case core::Message::Info:	// Info message
			break;

		case core::Message::Local:	// Chat message in the local zone
			break;

		case core::Message::RCon:	// RCon message
			break;

		case core::Message::Public:	// Public chat message
			audio::play("com/chat");
			break;

		case core::Message::Private:	// Private chat message
			audio::play("com/priv");
			break;

		default:
			break;
	}

	if (view()) {
		view()->chat()->event_text(message);
		view()->notify()->event_text(message);
	}

	con_print << message << std::endl;
}

//--- engine functions --------------------------------------------

void Client::func_snd_restart(std::string const &args)
{
	// unload entity sounds
	for (core::Entity::Registry::iterator it = core::Entity::registry().begin(); it != core::Entity::registry().end(); it++) {
		core::Entity *entity = (*it).second;

		if (ext_sound(entity))
			delete ext_sound(entity);
	}

	audio::reset();
}

void Client::func_r_restart(std::string const &args)
{
	video::restart();
}

void Client::func_ui_chat(std::string const &args)
{
	if (core::application()->connected()) {
		client()->view()->chat()->set_small_view(false);
		client()->view()->chat()->toggle();
	}
}

void Client::func_ui_chatsmall(std::string const &args)
{
	if (core::application()->connected()) {
		client()->view()->chat()->set_small_view(true);
		client()->view()->chat()->toggle();
	}
}

} // namespace client