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/*
   client/mainmenu.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 "client/buttonmenu.h"
#include "client/mainmenu.h"
#include "client/savegamemenu.h"
#include "core/core.h"
#include "core/gameinterface.h"
#include "core/application.h"
#include "filesystem/inifile.h"
#include "ui/paint.h"
#include "ui/ui.h"
#include "ui/label.h"
#include "ui/button.h"

namespace client
{

MainMenu::MainMenu(ui::Widget *parent) : 
	ui::Window(parent), 
	mainmenu_background("bitmaps/banner")
{
	// acive menu
	mainmenu_activemenu = 0;
	
	// default main menus 
	mainmenu_mainmenu  = 0;
	mainmenu_gamemenu  = 0;
	mainmenu_joinmenu  = 0;
	
	// default extra menus
	mainmenu_optionsmenu = 0;
	mainmenu_loadmenu = 0;
	mainmenu_savemenu = 0;
	mainmenu_connectmenu = 0;

	set_border(false);
	set_background(true);
	set_label("mainmenu");
	
	load();
}

MainMenu::~MainMenu()
{
}

void MainMenu::load_definitions()
{
	// load custom menu definitions from ini/menu.ini
	std::string filename("ini/menu");
	filesystem::IniFile ini;
	ini.open(filename);

	if (!ini.is_open()) {
		con_error << "Could not open " << ini.name() << std::endl;
		return;
	}
	
	con_debug << "  Loading menu definitions..." << std::endl;
	
	ui::Label *label = 0;
	ui::Button *button = 0;
	ButtonMenu *menu = 0;
	std::string strval;
	
	while (ini.getline()) {

		if (ini.got_section()) {
		
			if (ini.got_section("menu")) {
				menu = 0;
				continue;
				
			// menu button
			} else 	if (ini.got_section("button")) {
				
				if (!menu) {
					ini.unknown_error("button section without menu defintion");
				} else {
					button = menu->add_button();
				}
				continue;
				
			// menu label
			} else if (ini.got_section("label")) {
				
				if (!menu) {
					ini.unknown_error("label section without menu defintion");
				} else {
					label = menu->add_label();
				}
				continue;
	
			} else {
				ini.unknown_section();
				continue;
			}

		} else if (ini.got_key()) {
			
			if (ini.in_section("menu")) {
				
				if (ini.got_key_label("label", strval)) {
					
					for (ui::Widget::Children::iterator child = children().begin(); child != children().end(); ++child) {
						if ((*child)->label().compare(strval) == 0) {
							// assert child is a menu
							menu = static_cast<ButtonMenu*>((*child));
						}
					}

					if (!menu) {
						menu = new ButtonMenu(this, strval.c_str());
					}
				} else {
					ini.unknown_key();
				}
				
			} else if (menu) {
				
				if (ini.in_section("button")) {
					
					if (ini.got_key_string("text", strval)) {
						aux::strip_quotes(strval);
						button->set_text(strval);

					} else if (ini.got_key_string("command", strval)) {
						for (size_t i = 0; i <= strval.size(); i++) {
							if (strval[i] == ',') strval[i] = ';';
						}
						aux::strip_quotes(strval);
						button->set_command(strval);

					} else if (ini.got_key_string("align", strval)) {
						aux::to_label(strval);
						if (strval.compare("left") == 0) {
							button->set_alignment(ui::AlignLeft | ui::AlignVCenter);
						} else if (strval.compare("center") == 0) {
							button->set_alignment(ui::AlignCenter);
						} else if (strval.compare("right") == 0) {
							button->set_alignment(ui::AlignRight | ui::AlignVCenter);
						} else {
							ini.unknown_value();
						}
					} else {
						ini.unknown_key();
					}
					
				} else if (ini.in_section("label")) {
					
					if (ini.got_key_string("text", strval)) {
						label->set_text(strval);
					} else if (ini.got_key_string("align", strval)) {
						aux::to_label(strval);
						if (strval.compare("left") == 0) {
							label->set_alignment(ui::AlignLeft | ui::AlignHCenter);
						} else if (strval.compare("center") == 0) {
							label->set_alignment(ui::AlignCenter);
						} else if (strval.compare("right") == 0) {
							label->set_alignment(ui::AlignRight | ui::AlignHCenter);
						} else {
							ini.unknown_value();
						}
					} else {
						ini.unknown_key();
					}
				}
			}
		}
	}
		
	ini.close();
}

void MainMenu::load()
{
	remove_children();
	
	// main menu when not connected
	mainmenu_mainmenu = (ui::Widget *) new ButtonMenu(this, "main");
	static_cast<ButtonMenu *>(mainmenu_mainmenu)->set_compact();
	
	// main menu when connected
	mainmenu_gamemenu = (ui::Widget *) new ButtonMenu(this, "game");
	static_cast<ButtonMenu *>(mainmenu_gamemenu)->set_compact();
	
	// menu to join a game
	mainmenu_joinmenu = (ui::Widget *) new ButtonMenu(this, "join");
	static_cast<ButtonMenu *>(mainmenu_joinmenu)->set_compact();
	
	// load custom menus, this needs to be done before the
	// non-buttonmenu child widgets are created	
	load_definitions();
	
	// options menu
	mainmenu_optionsmenu = 0;
	
	// menu to connect to remote servers
	mainmenu_connectmenu = 0;
	
	// load game menu
	mainmenu_loadmenu = (ui::Widget *) new SaveGameMenu(this, "load", SaveGameMenu::Load);
	
	// save game menu
	mainmenu_savemenu = (ui::Widget *) new SaveGameMenu(this, "save", SaveGameMenu::Save);
	
	show_menu();
}

void MainMenu::show_menu()
{
	mainmenu_activemenu = 0;
	
	if (core::application()->connected()) {
	
		// show the main menu on non-interactive modules
		if (!core::game()->interactive()) {
			mainmenu_activemenu = mainmenu_mainmenu;

		// show the join menu if player does not control an entity
		} else if (!core::localcontrol()) {
			mainmenu_activemenu = mainmenu_joinmenu;
			
		} else {
			mainmenu_activemenu = mainmenu_gamemenu;
		}
		
	} else {
		mainmenu_activemenu = mainmenu_mainmenu;
	}

	// show the requested menu and hide all other children
	for (ui::Widget::Children::iterator child = children().begin(); child != children().end(); child++) {
		if ((*child) == mainmenu_activemenu) {
			(*child)->show();
		} else {
			(*child)->hide();
		}
	}
}

void MainMenu::show_default()
{
	if (core::application()->connected() && core::game()->interactive()) {
		show_menu(mainmenu_gamemenu);
	} else {
		show_menu(mainmenu_mainmenu);
	}

}
void MainMenu::show_menu(const Widget *widget)
{
	mainmenu_activemenu = 0;
	
	// show the requested menu and hide all other children
	for (ui::Widget::Children::iterator child = children().begin(); child != children().end(); child++) {
		if ((*child)== widget) {
			(*child)->show();
			mainmenu_activemenu = (*child);
		} else {
			(*child)->hide();
		}
	}
	
	show();
}

void MainMenu::show_menu(const char * label)
{
	mainmenu_activemenu = 0;
	
	for (ui::Widget::Children::iterator child = children().begin(); child != children().end(); ++child) {
		if ((*child)->label().compare(label) == 0) {
			(*child)->show();
			mainmenu_activemenu = (*child);
		} else {
			(*child)->hide();
		}
	}

	show();
}

void MainMenu::show()
{
	if (!mainmenu_activemenu)
		show_menu();
	ui::Window::show();
}

void MainMenu::hide()
{
	ui::Window::hide();
	mainmenu_activemenu = 0;
}

void MainMenu::resize()
{	
	// resize and reposition all child windows
	const float smallmargin = ui::UI::elementsize.height();
	
	for (ui::Widget::Children::iterator child = children().begin(); child != children().end(); ++child) {
		(*child)->set_size(width() - smallmargin * 2, height() -  smallmargin * 4);
		(*child)->set_location(smallmargin, smallmargin * 2);
	}
}

void MainMenu::draw_background()
{
	// we override draw_background instead of adding a ui::Bitmap child
	// this simplifies child window managment
	if (mainmenu_background.size()) {
		ui::Paint::draw_bitmap(global_location(), size(), mainmenu_background, true);
	}
}

void MainMenu::draw()
{
	if (mainmenu_activemenu == mainmenu_mainmenu) {
		if (core::game()->interactive()) {
			hide();
			return;
		}
		
	} else if (mainmenu_activemenu == mainmenu_joinmenu) {
		if (!core::game()->interactive()) {
			hide();
			return;
		}
		if (core::localcontrol()) {
			hide();
			return;
		}
		
	} else if (mainmenu_activemenu == mainmenu_gamemenu) {
		if (!core::game()->interactive()) {
			hide();
			return;
		}
	}
	
	ui::Window::draw();
}

bool MainMenu::on_keypress(const int key, const unsigned int modifier)
{
	if (key == SDLK_ESCAPE) {
		if (mainmenu_activemenu == mainmenu_mainmenu) {
			return true;
			
		} else if (mainmenu_activemenu == mainmenu_joinmenu) {
			show_menu(mainmenu_gamemenu);
			return true;
			
		} else if (mainmenu_activemenu == mainmenu_gamemenu) {
			if (core::localcontrol()) {
				hide();
			} else {
				show_menu(mainmenu_joinmenu);
			}
			return true;
			
		} else {
			show_menu();
			return true;			
		}		
	}

	return false;
}

} // namespace client