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/*
 * @(#)Token.java        5.0.4    2022-05-22
 *
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 * PRODUCT: MathParser.org-mXparser SOFTWARE
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 */
package org.mariuszgromada.math.mxparser.parsertokens;

import org.mariuszgromada.math.mxparser.Argument;
import org.mariuszgromada.math.mxparser.Constant;

/**
 * Token recognized by mXparser after string tokenization process.
 *
 * @author         Mariusz Gromada

 *                 MathParser.org - mXparser project page

 *                 mXparser on GitHub

 *                 INFIMA place to purchase a commercial MathParser.org-mXparser software license

 *                 [email protected]

 *                 ScalarMath.org - a powerful math engine and math scripting language

 *                 Scalar Lite

 *                 Scalar Pro

 *                 MathSpace.pl

 *
 * @version        5.0.0
 */
public class Token {
	/**
	 * Indicator that token was not matched
	 */
	public static final int NOT_MATCHED = KeyWord.NO_DEFINITION;
	/**
	 * String token
	 */
	public String tokenStr;
	/**
	 * Key word string (if matched)
	 */
	public String keyWord;
	/**
	 * Token identifier
	 */
	public int tokenId;
	/**
	 * Token type
	 */
	public int tokenTypeId;
	/**
	 * Token level
	 */
	public int tokenLevel;
	/**
	 * Token value if number
	 */
	public double tokenValue;
	/**
	 * If token was not matched then
	 * looksLike functionality is trying asses
	 * the kind of token
	 */
	public String looksLike;
	/**
	 * Verification if the token is a left unary operator.
	 *
	 * @return true in case token is unary left operator,
	 * otherwise returns false
	 */
	public boolean isUnaryLeftOperator() {
		if (tokenTypeId == Operator.TYPE_ID) {
			if (tokenId == Operator.SQUARE_ROOT_ID) return true;
			if (tokenId == Operator.CUBE_ROOT_ID) return true;
			if (tokenId == Operator.FOURTH_ROOT_ID) return true;
		}
		if (tokenTypeId == BooleanOperator.TYPE_ID) {
			if (tokenId == BooleanOperator.NEG_ID) return true;
		}
		if (tokenTypeId == BitwiseOperator.TYPE_ID) {
			if (tokenId == BitwiseOperator.COMPL_ID) return true;
		}
		return false;
	}
	/**
	 * Verification if the token is a right unary operator.
	 *
	 * @return true in case token is unary right operator,
	 * otherwise returns false
	 */
	public boolean isUnaryRightOperator() {
		if (tokenTypeId == Operator.TYPE_ID) {
			if (tokenId == Operator.FACT_ID) return true;
			if (tokenId == Operator.PERC_ID) return true;
		}
		return false;
	}
	/**
	 * Verification if the token is a left parenthesis.
	 *
	 * @return true in case token is a left parenthesis,
	 * otherwise returns false
	 */
	public boolean isLeftParenthesis() {
		if (tokenTypeId == ParserSymbol.TYPE_ID && tokenId == ParserSymbol.LEFT_PARENTHESES_ID)
			return true;
		else
			return false;
	}
	/**
	 * Verification if the token is a right parenthesis.
	 *
	 * @return true in case token is a right parenthesis,
	 * otherwise returns false
	 */
	public boolean isRightParenthesis() {
		if (tokenTypeId == ParserSymbol.TYPE_ID && tokenId == ParserSymbol.RIGHT_PARENTHESES_ID)
			return true;
		else
			return false;
	}
	/**
	 * Verification if the token is an identifier.
	 *
	 * @return true in case token is an identifier,
	 * otherwise returns false
	 */
	public boolean isIdentifier() {
		if (	tokenTypeId == Constant.TYPE_ID ||
				tokenTypeId == ConstantValue.TYPE_ID ||
				tokenTypeId == Unit.TYPE_ID ||
				tokenTypeId == Argument.TYPE_ID )
			return true;
		else
			return false;
	}
	/**
	 * Verification if the token is a binary operator.
	 *
	 * @return true in case token is a binary operator,
	 * otherwise returns false
	 */
	public boolean isBinaryOperator() {
		if (isUnaryLeftOperator()) return false;
		if (isUnaryRightOperator()) return false;
		if (tokenTypeId == BinaryRelation.TYPE_ID) return true;
		if (tokenTypeId == BitwiseOperator.TYPE_ID) return true;
		if (tokenTypeId == BooleanOperator.TYPE_ID) return true;
		if (tokenTypeId == Operator.TYPE_ID) {
			if (	tokenId != Operator.SQUARE_ROOT_ID
					&& tokenId != Operator.CUBE_ROOT_ID
					&& tokenId != Operator.FOURTH_ROOT_ID
					&& tokenId != Operator.FACT_ID
					&& tokenId != Operator.PERC_ID
			)  return true;
		}
		return false;
	}
	/**
	 * Verification if the token is a parameter separator.
	 *
	 * @return true in case token is a parameter separator,
	 * otherwise returns false
	 */
	public boolean isParameterSeparator() {
		if (tokenTypeId == ParserSymbol.TYPE_ID && tokenId == ParserSymbol.COMMA_ID)
			return true;
		else
			return false;
	}
	/**
	 * Verification if the token is a number.
	 *
	 * @return true in case token is a number,
	 * otherwise returns false
	 */
	public boolean isNumber() {
		if (tokenTypeId == ParserSymbol.NUMBER_TYPE_ID && tokenId == ParserSymbol.NUMBER_ID)
			return true;
		else
			return false;
	}
	/**
	 * Verification if the token is represented by a special name in the form [...].
	 *
	 * @return true in case token is represented by a special name in the form [...],
	 * otherwise returns false
	 */
	public boolean isSpecialTokenName() {
		if (tokenStr.length() == 0) return false;
		if (tokenStr.charAt(0) == '[') return true;
		else return false;
	}
	/**
	 * Verification if the token represents unicode root operator
	 *
	 * @return true in case token represents unicode root operator
	 * otherwise returns false
	 */
	public boolean isUnicodeRootOperator() {
		if (tokenTypeId == Operator.TYPE_ID) {
			if (tokenId == Operator.SQUARE_ROOT_ID) return true;
			if (tokenId == Operator.CUBE_ROOT_ID) return true;
			if (tokenId == Operator.FOURTH_ROOT_ID) return true;
		}
		return false;
	}
	/**
	 * Creates token representing multiplication operator.
	 *
	 * @return token representing multiplication operator.
	 */
	public static Token makeMultiplyToken() {
		Token multiplyToken = new Token();
		multiplyToken.tokenTypeId = Operator.TYPE_ID;
		multiplyToken.tokenId = Operator.MULTIPLY_ID;
		multiplyToken.tokenStr = Operator.MULTIPLY_STR;
		return multiplyToken;
	}
	/**
	 * Default constructor
	 */
	public Token() {
		tokenStr = "";
		keyWord = "";
		tokenId = NOT_MATCHED;
		tokenTypeId = NOT_MATCHED;
		tokenLevel = -1;
		tokenValue = Double.NaN;
		looksLike = "";
	}
	/**
	 * Token cloning.
	 */
	public Token clone() {
		Token token = new Token();
		token.keyWord = keyWord;
		token.tokenStr = tokenStr;
		token.tokenId = tokenId;
		token.tokenLevel = tokenLevel;
		token.tokenTypeId = tokenTypeId;
		token.tokenValue = tokenValue;
		token.looksLike = looksLike;
		return token;
	}
}