/*
*
*   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; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*   General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program; if not, write to the Free Software Foundation,
*   Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
*   In addition, as a special exception, the author gives permission to
*   link the code of this program with the Half-Life Game Engine ("HL
*   Engine") and Modified Game Libraries ("MODs") developed by Valve,
*   L.L.C ("Valve").  You must obey the GNU General Public License in all
*   respects for all of the code used other than the HL Engine and MODs
*   from Valve.  If you modify this file, you may extend this exception
*   to your version of the file, but you are not obligated to do so.  If
*   you do not wish to do so, delete this exception statement from your
*   version.
*
*/
#pragma once

#define UNDEFINED_COUNT		0xFFFF
#define MAX_PLACES_PER_MAP	64
#define UNDEFINED_SUBJECT	(-1)
#define COUNT_MANY		4		// equal to or greater than this is "many"

class CCSBot;
class BotChatterInterface;

typedef unsigned int PlaceCriteria;
typedef unsigned int CountCriteria;

// A meme is a unit information that bots use to
// transmit information to each other via the radio
class BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const = 0;		// cause the given bot to act on this meme
};

class BotAllHostagesGoneMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
};

class BotHostageBeingTakenMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
};

class BotHelpMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
public:
	Place m_place;
};

class BotBombsiteStatusMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
public:
	enum StatusType { CLEAR, PLANTED };
	int m_zoneIndex;	// the bombsite
	StatusType m_status;	// whether it is cleared or the bomb is there (planted)
};

class BotBombStatusMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme

public:
	CSGameState::BombState m_state;
	Vector m_pos;
};

class BotFollowMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
};

class BotDefendHereMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;				// cause the given bot to act on this meme
public:
	Vector m_pos;
};

class BotWhereBombMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
};

class BotRequestReportMeme: public BotMeme {
public:
	virtual void Interpret(CCSBot *sender, CCSBot *receiver) const;			// cause the given bot to act on this meme
};

enum BotStatementType
{
	REPORT_VISIBLE_ENEMIES,
	REPORT_ENEMY_ACTION,
	REPORT_MY_CURRENT_TASK,
	REPORT_MY_INTENTION,
	REPORT_CRITICAL_EVENT,
	REPORT_REQUEST_HELP,
	REPORT_REQUEST_INFORMATION,
	REPORT_ROUND_END,
	REPORT_MY_PLAN,
	REPORT_INFORMATION,
	REPORT_EMOTE,
	REPORT_ACKNOWLEDGE,			//  affirmative or negative
	REPORT_ENEMIES_REMAINING,
	REPORT_FRIENDLY_FIRE,
	REPORT_KILLED_FRIEND,
	//REPORT_ENEMY_LOST

	NUM_BOT_STATEMENT_TYPES,
};

// BotSpeakables are the smallest unit of bot chatter.
// They represent a specific wav file of a phrase, and the criteria for which it is useful
class BotSpeakable {
public:
	char *m_phrase;
	float m_duration;
	PlaceCriteria m_place;
	CountCriteria m_count;
};

typedef std::vector<BotSpeakable *> BotSpeakableVector;
typedef std::vector<BotSpeakableVector *> BotVoiceBankVector;

// The BotPhrase class is a collection of Speakables associated with a name, ID, and criteria
class BotPhrase {
public:
	const char *GetName() const { return m_name; }
	Place GetID() const { return m_id; }
	GameEventType GetRadioEquivalent() const { return m_radioEvent; }
	bool IsImportant() const { return m_isImportant; }				// return true if this phrase is part of an important statement
	bool IsPlace() const { return m_isPlace; }
public:
	friend class BotPhraseManager;
	char *m_name;
	Place m_id;
	bool m_isPlace;						// true if this is a Place phrase
	GameEventType m_radioEvent;
	bool m_isImportant;					// mission-critical statement

	mutable BotVoiceBankVector m_voiceBank;			// array of voice banks (arrays of speakables)
	std::vector<int> m_count;				// number of speakables
	mutable std::vector< int > m_index;			// index of next speakable to return
	int m_numVoiceBanks;					// number of voice banks that have been initialized

	mutable PlaceCriteria m_placeCriteria;
	mutable CountCriteria m_countCriteria;
};

typedef std::list<BotPhrase *> BotPhraseList;

// The BotPhraseManager is a singleton that provides an interface to all BotPhrase collections
class BotPhraseManager {
public:
	const BotPhraseList *GetPlaceList() const { return &m_placeList; }

	// return time last statement of given type was emitted by a teammate for the given place
	float GetPlaceStatementInterval(Place place) const;

	// set time of last statement of given type was emitted by a teammate for the given place
	void ResetPlaceStatementInterval(Place place) const;

public:
	int FindPlaceIndex(Place where) const;

	// master list of all phrase collections
	BotPhraseList m_list;

	// master list of all Place phrases
	BotPhraseList m_placeList;

	struct PlaceTimeInfo
	{
		Place placeID;
		IntervalTimer timer;
	};

	mutable PlaceTimeInfo m_placeStatementHistory[MAX_PLACES_PER_MAP];
	mutable int m_placeCount;
};

inline int BotPhraseManager::FindPlaceIndex(Place where) const
{
	for (int i = 0; i < m_placeCount; ++i)
	{
		if (m_placeStatementHistory[i].placeID == where)
			return i;
	}

	if (m_placeCount < MAX_PLACES_PER_MAP)
	{
		m_placeStatementHistory[++m_placeCount].placeID = where;
		m_placeStatementHistory[++m_placeCount].timer.Invalidate();
		return m_placeCount - 1;
	}

	return -1;
}

inline float BotPhraseManager::GetPlaceStatementInterval(Place place) const
{
	int index = FindPlaceIndex(place);

	if (index < 0)
		return 999999.9f;

	if (index >= m_placeCount)
		return 999999.9f;

	return m_placeStatementHistory[index].timer.GetElapsedTime();
}

inline void BotPhraseManager::ResetPlaceStatementInterval(Place place) const
{
	int index = FindPlaceIndex(place);

	if (index < 0)
		return;

	if (index >= m_placeCount)
		return;

	m_placeStatementHistory[index].timer.Reset();
}

// Statements are meaningful collections of phrases
class BotStatement {
public:
	BotChatterInterface *GetChatter() const { return m_chatter; }
	BotStatementType GetType() const { return m_type; }							// return the type of statement this is
	bool HasSubject() const { return (m_subject != UNDEFINED_SUBJECT); }
	void SetSubject(int playerID) { m_subject = playerID; }							// who this statement is about
	int GetSubject() const { return m_subject; }								// who this statement is about
	void SetPlace(Place where) { m_place = where; }								// explicitly set place

	void SetStartTime(float timestamp) { m_startTime = timestamp; }						// define the earliest time this statement can be spoken
	float GetStartTime() const { return m_startTime; }
	bool IsSpeaking() const { return m_isSpeaking; }			// return true if this statement is currently being spoken
	float GetTimestamp() const { return m_timestamp; }			// get time statement was created (but not necessarily started talking)

public:
	friend class BotChatterInterface;

	BotChatterInterface *m_chatter;				// the chatter system this statement is part of
	BotStatement *m_next, *m_prev;				// linked list hooks

	BotStatementType m_type;				// what kind of statement this is
	int m_subject;						// who this subject is about
	Place m_place;						// explicit place - note some phrases have implicit places as well
	BotMeme *m_meme;					// a statement can only have a single meme for now

	float m_timestamp;					// time when message was created
	float m_startTime;					// the earliest time this statement can be spoken
	float m_expireTime;					// time when this statement is no longer valid
	float m_speakTimestamp;					// time when message began being spoken
	bool m_isSpeaking;					// true if this statement is current being spoken

	float m_nextTime;					// time for next phrase to begin

	enum { MAX_BOT_PHRASES = 4 };
	enum ContextType
	{
		CURRENT_ENEMY_COUNT,
		REMAINING_ENEMY_COUNT,
		SHORT_DELAY,
		LONG_DELAY,
		ACCUMULATE_ENEMIES_DELAY,
	};
	struct
	{
		bool isPhrase;
		union
		{
			const BotPhrase *phrase;
			ContextType context;
		};

	}
	m_statement[MAX_BOT_PHRASES];

	enum { MAX_BOT_CONDITIONS = 4 };
	enum ConditionType
	{
		IS_IN_COMBAT,
		RADIO_SILENCE,
		ENEMIES_REMAINING,
		NUM_CONDITIONS,
	};

	ConditionType m_condition[MAX_BOT_CONDITIONS];		// conditions that must be true for the statement to be said
	int m_conditionCount;

	int m_index;						// m_index refers to the phrase currently being spoken, or -1 if we havent started yet
	int m_count;
};

// This class defines the interface to the bot radio chatter system
class BotChatterInterface {
public:
	CCSBot *GetOwner() const { return m_me; }
	int GetPitch() const { return m_pitch; }
	bool SeesAtLeastOneEnemy() const { return m_seeAtLeastOneEnemy; }
public:
	BotStatement *m_statementList;				// list of all active/pending messages for this bot
	void ReportEnemies();					// track nearby enemy count and generate enemy activity statements
	bool ShouldSpeak() const;				// return true if we speaking makes sense now
	CCSBot *m_me;						// the bot this chatter is for
	bool m_seeAtLeastOneEnemy;
	float m_timeWhenSawFirstEnemy;
	bool m_reportedEnemies;
	bool m_requestedBombLocation;				// true if we already asked where the bomb has been planted
	int m_pitch;
	IntervalTimer m_needBackupInterval;
	IntervalTimer m_spottedBomberInterval;
	IntervalTimer m_scaredInterval;
	IntervalTimer m_planInterval;
	CountdownTimer m_spottedLooseBombTimer;
	CountdownTimer m_heardNoiseTimer;
	CountdownTimer m_escortingHostageTimer;
};

extern BotPhraseManager *TheBotPhrases;