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/* $Id$ */

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/** @file ai_sign.cpp handles all functions of the AISign class */

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#include "ai_sign.hpp"

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#include "table/strings.h"

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#include "../../command.h"

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#include "../../landscape.h"

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#include "../../signs.h"

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#include "../../strings.h"

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#include "../../variables.h" /* For SetDParam */

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SignID AISign::GetMaxSignID()

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{

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	return ::GetMaxSignIndex();

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}

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int32 AISign::GetSignCount()

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{

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	return ::GetNumSigns();

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}

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/* static */ bool AISign::IsValidSign(SignID sign_id)

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{

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	return ::IsValidSignID(sign_id);

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}

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char *AISign::GetText(SignID sign_id)

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{

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	if (!AISign::IsValidSign(sign_id)) return NULL;

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	static const int len = 64;

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	char *sign_name = MallocT<char>(len);

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	::GetString(sign_name, ::GetSign(sign_id)->str, &sign_name[len - 1]);

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	return sign_name;

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}

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TileIndex AISign::GetLocation(SignID sign_id)

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{

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	if (!AISign::IsValidSign(sign_id)) return INVALID_TILE;

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	const Sign *sign = ::GetSign(sign_id);

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	return ::TileVirtXY(sign->x, sign->y);

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}

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bool AISign::RemoveSign(SignID sign_id)

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{

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	_cmd_text = "";

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	return this->DoCommand(0, sign_id, 0, CMD_RENAME_SIGN);

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}

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SignID AISign::BuildSign(TileIndex location, const char *text)

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{

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	if (!::IsValidTile(location)) return INVALID_SIGN;

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	/* Reset the internal NewSignID in case we are in TestMode */

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	AIObject::SetNewSignID(0);

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	bool ret = this->DoCommand(location, 0, 0, CMD_PLACE_SIGN);

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	if (!ret) return INVALID_SIGN;

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	SignID new_sign_id = AIObject::GetNewSignID();

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	_cmd_text = text;

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	ret = this->DoCommand(0, new_sign_id, 0, CMD_RENAME_SIGN);

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	if (!ret) {

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		this->RemoveSign(new_sign_id);

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		return INVALID_SIGN;

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	}

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	return new_sign_id;

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}