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/**
 * SPDX-FileCopyrightText: (c) 2000 Liferay, Inc. https://liferay.com
 * SPDX-License-Identifier: LGPL-2.1-or-later OR LicenseRef-Liferay-DXP-EULA-2.0.0-2023-06
 */

package com.liferay.source.formatter.checkstyle.check;

import com.liferay.portal.kernel.util.StringUtil;

import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;

import java.util.List;

/**
 * @author Hugo Huijser
 */
public class AssertEqualsCheck extends BaseCheck {

	@Override
	public int[] getDefaultTokens() {
		return new int[] {TokenTypes.METHOD_DEF};
	}

	@Override
	protected void doVisitToken(DetailAST detailAST) {
		List methodCallDetailASTList = getMethodCalls(
			detailAST, "Assert", "assertEquals");

		for (DetailAST methodCallDetailAST : methodCallDetailASTList) {
			DetailAST elistDetailAST = methodCallDetailAST.findFirstToken(
				TokenTypes.ELIST);

			List exprDetailASTList = getAllChildTokens(
				elistDetailAST, false, TokenTypes.EXPR);

			if (exprDetailASTList.size() != 2) {
				continue;
			}

			DetailAST firstExprDetailAST = exprDetailASTList.get(0);

			DetailAST firstChildDetailAST = firstExprDetailAST.getFirstChild();

			if ((firstChildDetailAST.getType() == TokenTypes.LITERAL_FALSE) ||
				(firstChildDetailAST.getType() == TokenTypes.LITERAL_TRUE)) {

				log(
					methodCallDetailAST, _MSG_ASSERT_USE_BOOLEAN,
					StringUtil.upperCaseFirstLetter(
						firstChildDetailAST.getText()));
			}

			DetailAST secondExprDetailAST = exprDetailASTList.get(1);

			firstChildDetailAST = secondExprDetailAST.getFirstChild();

			String variableName = _getVariableNameForMethodCall(
				firstChildDetailAST, "getLength");

			if (variableName != null) {
				DetailAST typeDetailAST = getVariableTypeDetailAST(
					methodCallDetailAST, variableName);

				if ((typeDetailAST != null) && _isHits(typeDetailAST)) {
					log(
						methodCallDetailAST, _MSG_ASSERT_ADD_INFORMATION,
						variableName + ".toString()");
				}

				continue;
			}

			variableName = _getVariableNameForCall(
				firstChildDetailAST, "length");

			if (variableName != null) {
				DetailAST typeDetailAST = getVariableTypeDetailAST(
					methodCallDetailAST, variableName);

				if ((typeDetailAST != null) && isArray(typeDetailAST)) {
					log(
						methodCallDetailAST, _MSG_ASSERT_ADD_INFORMATION,
						"Arrays.toString(" + variableName + ")");
				}

				continue;
			}

			variableName = _getVariableNameForMethodCall(
				firstChildDetailAST, "size");

			if (variableName != null) {
				DetailAST typeDetailAST = getVariableTypeDetailAST(
					methodCallDetailAST, variableName);

				if ((typeDetailAST != null) && isCollection(typeDetailAST)) {
					log(
						methodCallDetailAST, _MSG_ASSERT_ADD_INFORMATION,
						variableName + ".toString()");
				}
			}
		}
	}

	private String _getVariableNameForCall(
		DetailAST detailAST, String methodName) {

		if (detailAST.getType() != TokenTypes.DOT) {
			return null;
		}

		List names = getNames(detailAST, false);

		if ((names.size() != 2) || !methodName.equals(names.get(1))) {
			return null;
		}

		return names.get(0);
	}

	private String _getVariableNameForMethodCall(
		DetailAST detailAST, String methodName) {

		if (detailAST.getType() != TokenTypes.METHOD_CALL) {
			return null;
		}

		DetailAST firstChildDetailAST = detailAST.getFirstChild();

		return _getVariableNameForCall(firstChildDetailAST, methodName);
	}

	private boolean _isHits(DetailAST detailAST) {
		return StringUtil.equals(getName(detailAST), "Hits");
	}

	private static final String _MSG_ASSERT_ADD_INFORMATION =
		"assert.add.information";

	private static final String _MSG_ASSERT_USE_BOOLEAN = "assert.use.boolean";

}