/*
 * Copyright 2007-2008 Dave Griffith
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jetbrains.plugins.groovy.codeInspection.threading;

import com.intellij.psi.CommonClassNames;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiModifier;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspection;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrSynchronizedStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlock;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.path.GrMethodCallExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod;

public class GroovyWaitWhileNotSynchronizedInspection extends BaseInspection {

    @Override
    @Nls
    @NotNull
    public String getGroupDisplayName() {
        return THREADING_ISSUES;
    }

    @Override
    @Nls
    @NotNull
    public String getDisplayName() {
        return "'wait()' while not synced";
    }

    @Override
    @Nullable
    protected String buildErrorString(Object... args) {
        return "Call to'#ref' outside of synchronized context #loc";

    }

    @NotNull
    @Override
    public BaseInspectionVisitor buildVisitor() {
        return new Visitor();
    }

    private static class Visitor extends BaseInspectionVisitor {
        @Override
        public void visitMethodCallExpression(GrMethodCallExpression grMethodCallExpression) {
            super.visitMethodCallExpression(grMethodCallExpression);
            final GrExpression methodExpression = grMethodCallExpression.getInvokedExpression();
            if (!(methodExpression instanceof GrReferenceExpression)) {
                return;
            }
            final GrReferenceExpression reference = (GrReferenceExpression) methodExpression;
            final String name = reference.getReferenceName();
            if (!"wait".equals(name)) {
                return;
            }
            final PsiMethod method = grMethodCallExpression.resolveMethod();
            if (method == null) {
                return;
            }
            final PsiClass containingClass = method.getContainingClass();
            if (containingClass == null || !CommonClassNames.JAVA_LANG_OBJECT.equals(containingClass.getQualifiedName())) {
                return;
            }
            final GrMethod containingMethod = PsiTreeUtil.getParentOfType(grMethodCallExpression, GrMethod.class);
            if(containingMethod!=null && containingMethod.hasModifierProperty(PsiModifier.SYNCHRONIZED))
            {
                return;
            }
            final GrStatement parent = PsiTreeUtil.getParentOfType(grMethodCallExpression, GrSynchronizedStatement.class, GrClosableBlock.class);
            if (parent instanceof GrSynchronizedStatement) {
                return;
            }
            registerMethodCallError(grMethodCallExpression);
        }
    }
}