/*
   Copyright (C) 2009 - 2015 by Tomasz Sniatowski <kailoran@gmail.com>
   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 as published by
   the Free Software Foundation; either version 2 of the License, 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 INC_LOBBY_DATA
#define INC_LOBBY_DATA

#include "sdl_utils.hpp"

#include <set>
#include <deque>
#include <functional>

class config;

/** This class represents a single stored chat message */
struct chat_message
{
	/** Create a chat message */
	chat_message(const time_t& timestamp,
				 const std::string& user,
				 const std::string& message);

	time_t timestamp;
	std::string user;
	std::string message;
};

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

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

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

	const std::deque<chat_message>& history() const
	{
		return history_;
	}

	void clear();

private:
	std::deque<chat_message> history_;
};

/**
 * This class represents the information a client has about a room
 */
class room_info
{
public:
	explicit room_info(const std::string& name);

	const std::string& name() const
	{
		return name_;
	}
	const std::set<std::string>& members() const
	{
		return members_;
	}
	bool is_member(const std::string& user) const;
	void add_member(const std::string& user);
	void remove_member(const std::string& user);
	void process_room_members(const config& data);

	const chat_log& log() const
	{
		return log_;
	}
	chat_log& log()
	{
		return log_;
	}

private:
	std::string name_;
	std::set<std::string> members_;
	chat_log log_;
};


/**
 * This class represents the information a client has about another player
 */
struct user_info
{
	explicit user_info(const config& c);

	void update_state(int selected_game_id,
					  const room_info* current_room = NULL);
	void update_relation();

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

	bool operator>(const user_info& b) const;

	std::string name;
	int game_id;
	user_relation relation;
	user_state state;
	bool registered;
	bool observing;
};

/**
 * This class represents the info a client has about a game on the server
 */
struct game_info
{
	game_info(const config& c, const config& game_config);

	bool can_join() const;
	bool can_observe() const;

	surface mini_map;
	int id;
	std::string map_data;
	std::string name;
	std::string scenario;
	bool remote_scenario;
	std::string map_info;
	std::string map_size_info;
	std::string era;
	std::string era_short;

	std::string gold;
	std::string support;
	std::string xp;
	std::string vision;
	std::string status; // vacant slots or turn info
	std::string time_limit;
	size_t vacant_slots;

	unsigned int current_turn;
	bool reloaded;
	bool started;
	bool fog;
	bool shroud;
	bool observers;
	bool shuffle_sides;
	bool use_map_settings;
	bool verified;
	bool password_required;
	bool have_era;
	bool have_all_mods;

	bool has_friends;
	bool has_ignored;

	enum game_display_status {
		CLEAN,
		NEW,
		UPDATED,
		DELETED
	};
	game_display_status display_status;

	const char* display_status_string() const;
};

class game_filter_base : public std::unary_function<game_info, bool>
{
public:
	virtual ~game_filter_base()
	{
	}
	virtual bool match(const game_info& game) const = 0;
	bool operator()(const game_info& game) const
	{
		return match(game);
	}
};

template <class T>
class game_filter_not : public game_filter_base
{
public:
	explicit game_filter_not(const T& t) : t(t)
	{
	}
	bool match(const game_info& game) const
	{
		return !t.match(game);
	}
	T t;
};

class game_filter_stack : public game_filter_base
{
public:
	game_filter_stack();
	virtual ~game_filter_stack();

	/**
	 * Takes ownership
	 */
	void append(game_filter_base* f);

	void clear();

	bool empty() const
	{
		return filters_.empty();
	}

protected:
	std::vector<game_filter_base*> filters_;
};

class game_filter_and_stack : public game_filter_stack
{
public:
	bool match(const game_info& game) const;
};

template <class T, T game_info::*member, class OP = std::equal_to<T> >
class game_filter_value : public game_filter_base
{
public:
	explicit game_filter_value(const T& value) : member_(member), value_(value)
	{
	}

	bool match(const game_info& game) const
	{
		return OP()(game.*member_, value_);
	}

private:
	T game_info::*member_;
	T value_;
};

class game_filter_general_string_part : public game_filter_base
{
public:
	explicit game_filter_general_string_part(const std::string& value)
		: value_(value)
	{
	}

	bool match(const game_info& game) const;

private:
	std::string value_;
};

#endif