/*
 * Copyright (C) 2015-2016 Federico Tomassetti
 * Copyright (C) 2017-2024 The JavaParser Team.
 *
 * This file is part of JavaParser.
 *
 * JavaParser can be used either under the terms of
 * a) the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * b) the terms of the Apache License
 *
 * You should have received a copy of both licenses in LICENCE.LGPL and
 * LICENCE.APACHE. Please refer to those files for details.
 *
 * JavaParser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 */

package com.github.javaparser.symbolsolver.javassistmodel;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;

import com.github.javaparser.resolution.TypeSolver;
import com.github.javaparser.resolution.declarations.ResolvedParameterDeclaration;
import com.github.javaparser.symbolsolver.AbstractSymbolResolutionTest;
import com.github.javaparser.symbolsolver.resolution.typesolvers.CombinedTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.JarTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
import java.io.IOException;
import java.nio.file.Path;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public class JavassistMethodDeclarationTest extends AbstractSymbolResolutionTest {

    private TypeSolver typeSolver;

    @BeforeEach
    void setup() throws IOException {
        Path pathToJar = adaptPath("src/test/resources/javassistmethoddecl/javassistmethoddecl.jar");
        typeSolver = new CombinedTypeSolver(new JarTypeSolver(pathToJar), new ReflectionTypeSolver());
    }

    @Test
    void getParam_forMethodParameterWithRawType() {
        JavassistClassDeclaration classDecl = (JavassistClassDeclaration) typeSolver.solveType("C");
        JavassistMethodDeclaration method = findMethodWithName(classDecl, "methodWithRawParameter");

        ResolvedParameterDeclaration param = method.getParam(0);

        assertThat(param.describeType(), is("java.util.List"));
    }

    @Test
    void getParam_forMethodParameterWithGenericType() {
        JavassistClassDeclaration classDecl = (JavassistClassDeclaration) typeSolver.solveType("C");
        JavassistMethodDeclaration method = findMethodWithName(classDecl, "methodWithGenericParameter");

        ResolvedParameterDeclaration param = method.getParam(0);

        assertThat(param.describeType(), is("java.util.List<java.lang.String>"));
    }

    @Test
    void getParam_forMethodParameterWithTypeParameter() {
        JavassistClassDeclaration classDecl = (JavassistClassDeclaration) typeSolver.solveType("C");
        JavassistMethodDeclaration method = findMethodWithName(classDecl, "methodWithTypeParameter");

        ResolvedParameterDeclaration param = method.getParam(0);

        assertThat(param.describeType(), is("java.util.List<S>"));
    }

    @Test
    void getParam_forGenericMethodWithTypeParameter() {
        JavassistClassDeclaration classDecl = (JavassistClassDeclaration) typeSolver.solveType("C");
        JavassistMethodDeclaration method = findMethodWithName(classDecl, "genericMethodWithTypeParameter");

        ResolvedParameterDeclaration param = method.getParam(0);

        assertThat(param.describeType(), is("java.util.List<T>"));
    }

    @Test
    void testGetExceptionsFromMethodWithoutExceptions() {
        JavassistClassDeclaration classDecl = (JavassistClassDeclaration) typeSolver.solveType("C");
        JavassistMethodDeclaration method = findMethodWithName(classDecl, "genericMethodWithTypeParameter");

        assertThat(method.getNumberOfSpecifiedExceptions(), is(0));
    }

    @Test
    void testGetExceptionsFromMethodWithExceptions() {
        JavassistClassDeclaration classDecl = (JavassistClassDeclaration) typeSolver.solveType("C");
        JavassistMethodDeclaration method = findMethodWithName(classDecl, "methodWithExceptions");

        assertThat(method.getNumberOfSpecifiedExceptions(), is(2));
        assertThat(method.getSpecifiedException(0).describe(), is("java.lang.IllegalArgumentException"));
        assertThat(method.getSpecifiedException(1).describe(), is("java.io.IOException"));
    }

    private JavassistMethodDeclaration findMethodWithName(JavassistClassDeclaration classDecl, String name) {
        return classDecl.getDeclaredMethods().stream()
                .filter(methodDecl -> methodDecl.getName().equals(name))
                .map(m -> (JavassistMethodDeclaration) m)
                .findAny()
                .get();
    }
}
