/*****************************************************************************
The Dark Mod GPL Source Code

This file is part of the The Dark Mod Source Code, originally based
on the Doom 3 GPL Source Code as published in 2011.

The Dark Mod Source Code 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 3 of the License,
or (at your option) any later version. For details, see LICENSE.TXT.

Project: The Dark Mod (http://www.thedarkmod.com/)

******************************************************************************/

#ifndef __AI_CONVERSATION_COMMAND_H__
#define __AI_CONVERSATION_COMMAND_H__

#include "precompiled.h"


namespace ai {

class Conversation;

class ConversationCommand
{
public:
	// These are the various command types
	enum Type
	{
		EWaitSeconds = 0,
		EWalkToActor,
		EWalkToPosition,
		EWalkToEntity,
		EStopMove,
		ETalk,
		EPlayAnimOnce,
		EPlayAnimCycle,
		EActivateTarget,
		ELookAtActor,
		ELookAtPosition,
		ELookAtEntity,
		ETurnToActor,
		ETurnToPosition,
		ETurnToEntity,
		EAttackActor,
		EAttackEntity,
		EInteractWithEntity,
		ERunScript,
		EWaitForActor,
		EWaitForAllActors,
		ENumCommands,
	};

	// The string representations of the above (keep in sync please)
	static const char* const TypeNames[ENumCommands];

	// Each command can have several states
	enum State
	{
		EReadyForExecution,	// not processed yet
		EExecuting,			// executing
		EFinished,			// done processing
		EAborted,			// cancelled
		ENumStates,			// invalid index
	};

private:
	// The type of this command
	Type _type;

	// The state of this command
	State _state;

	// The index of the actor who is supposed to execute this command
	// Note that the index as specified in the spawnargs is decreased by 1 to
	// match the ones in the idList.
	int _actor;

	// TRUE if the actor should fully wait until the action ends
	bool _waitUntilFinished;

	// Argument list
	idStringList _arguments;

public:
	// Default constructor
	ConversationCommand();

	// Returns the type of this conversation command
	Type GetType();

	// The execution state of this command
	State GetState();
	void SetState(State newState);

	// Returns TRUE if the actor should wait for the command to finish
	bool WaitUntilFinished();

	// Returns the actor index of this command
	int GetActor();

	// Returns the number of arguments
	int GetNumArguments();

	// Returns the given argument (starting with index 0) or "" if the argument doesn't exist
	idStr GetArgument(int index);

	// Tries to convert the name in the given argument to an entity pointer
	idEntity* GetEntityArgument(int index);

	// Casts the argument to a float (returns 0.0f if not existing)
	float GetFloatArgument(int index);

	// Casts the argument to a 3D vector (returns <0,0,0> if argument is not existing)
	idVec3 GetVectorArgument(int index);

	/**
	 * greebo: Parses the command parameters from the given idDict.
	 * The prefix is something along the lines "conv_2_cmd_3_" and is
	 * used to find all spawnargs relevant for this command.
	 *
	 * Returns TRUE if the parse process succeeded, FALSE otherwise.
	 */
	bool Parse(const idDict& dict, const idStr& prefix);

	// Save/Restore routines
	void Save(idSaveGame* savefile) const;
	void Restore(idRestoreGame* savefile);

private:
	// Tries to convert the string representation of the command into a Type enum value
	static Type GetType(const idStr& cmdString);
};
typedef std::shared_ptr<ConversationCommand> ConversationCommandPtr;

} // namespace ai

#endif /* __AI_CONVERSATION_COMMAND_H__ */