/* $Id$ */
/*
   Copyright (C) 2007 - 2008
   Part of the Battle for Wesnoth Project http://www.wesnoth.org

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2
   or at your option any later version.
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY.

   See the COPYING file for more details.
*/
#ifndef MULTIPLAYER_UI_HPP_INCLUDED
#define MULTIPLAYER_UI_HPP_INCLUDED

#include "hotkeys.hpp"
#include "network.hpp"
#include "preferences_display.hpp"
#include "widgets/label.hpp"
#include "widgets/menu.hpp"
#include "widgets/textbox.hpp"
#include "menu_events.hpp"

#include <deque>
#include <string>

class display;
class config;
class game_state;

namespace mp {

enum controller { CNTR_NETWORK = 0, CNTR_LOCAL, CNTR_COMPUTER, CNTR_EMPTY, CNTR_RESERVED, CNTR_LAST };

void check_response(network::connection res, const config& data);

void level_to_gamestate(config& level, game_state& state, bool saved_game=false);

std::string get_colour_string(int id);

/** this class memorizes a chat session. */
class chat
{
public:
	chat();

	void add_message(const time_t& time, const std::string& user,
			const std::string& message);

	void init_textbox(gui::textbox& textbox);
	void update_textbox(gui::textbox& textbox);

private:
	struct msg {
		msg(const time_t& time, const std::string& user, const std::string& message)
			: time(time), user(user), message(message) {};
		time_t time;
		std::string user;
		std::string message;
	};
	typedef std::deque<msg> msg_hist;

	std::string format_message(const msg& message);

	msg_hist message_history_;
	msg_hist::size_type last_update_;
};

/**
 * a base class for the different multiplayer base dialogs: game list, create
 * game, wait game, game setup.
 */
class ui : public gui::widget, private events::chat_handler, private font::floating_label_context
{
public:
	enum result { CONTINUE, JOIN, OBSERVE, CREATE, PREFERENCES, PLAY, QUIT };

	ui(game_display& d, const std::string& title,
			const config& cfg, chat& c, config& gamelist);

	/**
	 * Asks the multiplayer_ui to pump some data from the network, and then to
	 * process it. The actual processing will be left to the child classes,
	 * through process_network_data and process_network_error.
	 */
	void process_network();

	/**
	 * Returns the result of the current widget. While the result is equal to
	 * continue, the widget should not be destroyed.
	 */
	result get_result();

	/**
	 * Hides children, moves them (using layout_children), then shows them.
	 *
	 * The methodes hide_children and layout_children are supposed to be
	 * overridden by subclasses of this class which add new sub-widgets.
	 */
	void set_location(const SDL_Rect& rect);
	using widget::set_location;

protected:
	int xscale(int x) const;
	int yscale(int y) const;
	static const int xscale_base;
	static const int yscale_base;

	SDL_Rect client_area() const;

	game_display& disp_;
	game_display& disp() { return disp_; };

	/**
	 * Returns the main game config, as defined by loading the preprocessed WML
	 * files. Children of this class may need this to obtain, for example, the
	 * list of available eras.
	 */
	const config& game_config() const;

	virtual void draw_contents();

	virtual void process_event();

	virtual void handle_event(const SDL_Event& event);
	virtual void handle_key_event(const SDL_KeyboardEvent& event);

	/** Override chat_handler. */
	void add_chat_message(const time_t& time, const std::string& speaker,
			int side, const std::string& message,
			game_display::MESSAGE_TYPE type=game_display::MESSAGE_PRIVATE);
	void send_chat_message(const std::string& message, bool allies_only=false);

	/** Process chat messages. */
	void process_message(const config& msg, const bool whisper=false);

	/**
	 * Processes any pending network data. Called by the public
	 * process_network() method. Overridden by subclasses who add more
	 * behaviour for network.
	 */
	virtual void process_network_data(const config& data, const network::connection sock);

	/**
	 * Processes any pending network error. Called by the public
	 * process_network() method. Overridden by subclasses.
	 */
	virtual void process_network_error(network::error& error);

	/**
	 * Return true if we must accept incoming connections, false if not.
	 * Defaults to not.
	 */
	virtual bool accept_connections() { return false; };

	/** Processes a pending network connection. */
	virtual void process_network_connection(const network::connection sock);

	/**
	 * Hides or shows all gui::widget children of this widget. Should be
	 * overridden by subclasses which add their own children.
	 */
	virtual void hide_children(bool hide=true);

	/**
	 * Lays the children out. This method is to be overridden by the subclasses
	 * of the mp_ui class; it will be called.
	 */
	virtual void layout_children(const SDL_Rect& rect);

	/** Sets the result of this dialog, to be checked by get_result(). */
	result set_result(result res);

	/**
	 * Sets the name of the selected game which is used to highlight the names
	 * of the players which have joined this game.
	 */
	void set_selected_game(const std::string game_name);

	/**
	 * Called each time the gamelist_ variable is updated. May be
	 * overridden by child classes to add custom gamelist behaviour.
	 */
	virtual void gamelist_updated(bool silent=true);

	/** Sets the user list */
	void set_user_list(const std::vector<std::string>&, bool silent);
	void set_user_menu_items(const std::vector<std::string>& list);

	/** Returns the current gamelist */
	config& gamelist() { return gamelist_; };

	void append_to_title(const std::string& name);
	const gui::label& title() const;

private:
	/** 
	 * Set to true when the widgets are intialized. Allows delayed
	 * initialization on first positioning.
	 */
	bool initialized_;
	bool gamelist_initialized_;

	/** Ensures standard hotkeys are coorectly handled. */
	const hotkey::basic_handler hotkey_handler_;

	const preferences::display_manager disp_manager_;

	/**
	 * The main game configuration, as defined by loading the preprocessed WML
	 * files. Access using the game_config() method if necessary.
	 */
	const config& game_config_;

	chat& chat_;

	config& gamelist_;

	gui::label title_;
#ifndef USE_TINY_GUI
	gui::textbox entry_textbox_;
#endif
	gui::textbox chat_textbox_;

	gui::menu users_menu_;

	std::vector<std::string> user_list_;

	std::string selected_game_;

	result result_;

	bool gamelist_refresh_;

	Uint32 lobby_clock_;

public:
	enum user_relation { ME, FRIEND, NEUTRAL, IGNORED };
	enum user_state    { LOBBY, GAME, SEL_GAME };

private:
	struct user_info
	{
		user_info() :
			name(),
			game_id(),
			location(),
			relation(ME),
			state(LOBBY),
			registered()
		{
		}

		std::string    name;
		std::string    game_id;
		std::string    location;
		user_relation  relation;
		user_state     state;
		/** True if this user is registered on the server. */
		bool           registered;
		bool operator> (const user_info& b) const;
	};
};

}

#endif