/*
   server/console.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 <iostream>

#include "server/console.h"
#include "core/core.h"
#include "sys/consoleinterface.h"

#ifdef HAVE_CURSES
#include <ncurses.h>
#endif

namespace server {

bool console_initialized = false;
bool console_updated = false;

Console server_console;

#ifdef HAVE_CURSES
WINDOW *stdwin;
#endif

Console *console()
{
	return (&server_console);
}

void Console::init()
{
#ifdef HAVE_CURSES
        stdwin = initscr();             // initialize the ncurses window
        cbreak();                       // disable input line buffering
        noecho();                       // don't show typed characters
        keypad(stdwin, TRUE);           // enable special keys
        nodelay(stdwin, TRUE);          // non-blocking input
        curs_set(0);                    // disable cursor

	console_initialized = true;
	console_updated = true;
#endif // HAVE_CURSES	

	con_print << "Initializing console..." << std::endl;

#ifdef HAVE_CURSES
	server_console.console_lastrefresh = 1;
	server_console.draw();
#endif // HAVE_CURSES
}

void Console::shutdown()
{
	con_print << "Shutting down console..." << std::endl;

#ifdef HAVE_CURSES
	server_console.draw();
	endwin();
	console_initialized = false;
#endif
}

#ifdef HAVE_CURSES
void Console::resize()
{
	if (!console_initialized)
		return;
	
	endwin();
	refresh();
	
	console_updated = true;
}

void Console::flush()
{
        char line[MAXCMDSIZE];

        while(consoleinterface_buffer.getline(line, MAXCMDSIZE-1)) {

                while (consoleinterface_text.size() >= sys::MAXCONLINES) {
                        consoleinterface_text.pop_front();
                }
                consoleinterface_text.push_back(std::string(line));
		console_updated = true;
        }

        consoleinterface_buffer.clear();
}

void Console::draw_background()
{
	bkgdset(' ');
	clear();

	// draw version string
	std::string versionstr("The Osirion Project ");
	versionstr.append(core::version());
	mvaddstr(0, stdwin->_maxx - 1 - versionstr.size(), versionstr.c_str());
}

void Console::draw_text()
{
	int w = stdwin->_maxx;
	int h = stdwin->_maxy;
	
	if ((w < 3) || (h < 3))
		return;

	int y = h-1;

	// draw console text
	std::deque<std::string>::reverse_iterator rit = consoleinterface_text.rbegin(); 
	while (rit != consoleinterface_text.rend() && y > 0) {
		mvaddnstr(y, 0, (*rit).c_str(), w);
		++rit;
		y--;
	}
}

void Console::draw() 
{
	flush();

	if (console_lastrefresh < 0.1) {
		return;
	}

 	if (console_initialized && console_updated && stdwin->_maxx && stdwin->_maxy) {

		draw_background();
		draw_text();
		wrefresh(stdwin);

		console_updated = false;
		console_lastrefresh = 0;
	}

}

void Console::frame(float seconds)
{
	if (!console_initialized)
		return;

	console_lastrefresh += seconds;

	int key = wgetch(stdwin);
	while (key != ERR) {
		key = wgetch(stdwin);
	}

	draw();
}
#endif // HAVE_CURSES

}