/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2024 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.builders;

import static com.github.javaparser.StaticJavaParser.parseImport;
import static com.github.javaparser.ast.Modifier.Keyword.PRIVATE;
import static com.github.javaparser.ast.Modifier.Keyword.PUBLIC;
import static org.junit.jupiter.api.Assertions.*;

import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.Modifier;
import com.github.javaparser.ast.PackageDeclaration;
import com.github.javaparser.ast.body.AnnotationDeclaration;
import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration;
import com.github.javaparser.ast.body.EnumDeclaration;
import com.github.javaparser.ast.body.RecordDeclaration;
import com.github.javaparser.ast.expr.Name;
import com.github.javaparser.utils.LineSeparator;
import java.lang.annotation.ElementType;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import org.junit.jupiter.api.Test;

class CompilationUnitBuildersTest {
    private final CompilationUnit cu = new CompilationUnit();

    @Test
    void testAddImport() {
        // duplicate imports
        cu.addImport(Map.class);
        cu.addImport(Map.class);
        cu.addImport(Map.class.getCanonicalName());
        cu.addImport(List.class);
        assertEquals(2, cu.getImports().size());

        cu.addImport(com.github.javaparser.StaticJavaParser.class.getCanonicalName() + ".parseImport", true, false);
        assertEquals(3, cu.getImports().size());

        assertEquals(
                "import " + Map.class.getCanonicalName() + ";" + LineSeparator.SYSTEM,
                cu.getImport(0).toString());
        assertEquals(
                "import " + List.class.getCanonicalName() + ";" + LineSeparator.SYSTEM,
                cu.getImport(1).toString());
        assertEquals(
                "import static " + com.github.javaparser.StaticJavaParser.class.getCanonicalName() + ".parseImport;"
                        + LineSeparator.SYSTEM,
                cu.getImport(2).toString());
    }

    public class $tartsWith$ {}

    @Test
    public void test$ImportStarts() {
        cu.addImport($tartsWith$.class);
        cu.addImport("my.$tartsWith$");
        assertEquals(2, cu.getImports().size());
        assertEquals(
                "import " + $tartsWith$.class.getCanonicalName() + ";" + LineSeparator.SYSTEM,
                cu.getImport(0).toString());
        assertEquals(
                "import my.$tartsWith$;" + LineSeparator.SYSTEM, cu.getImport(1).toString());
    }

    public class F$F {}

    @Test
    public void test$Import() {
        cu.addImport(F$F.class);
        cu.addImport("my.F$F");
        // doesnt fail, but imports class "F.F"
        assertEquals(2, cu.getImports().size());
        assertEquals(
                "import " + F$F.class.getCanonicalName() + ";" + LineSeparator.SYSTEM,
                cu.getImport(0).toString());
        assertEquals("import my.F$F;" + LineSeparator.SYSTEM, cu.getImport(1).toString());
    }

    @Test
    void ignoreJavaLangImports() {
        cu.addImport("java.lang.Long");
        cu.addImport("java.lang.*");
        cu.addImport(String.class);
        assertEquals(0, cu.getImports().size());
    }

    @Test
    void ignoreImportsWithinSamePackage() {
        cu.setPackageDeclaration(new PackageDeclaration(new Name(new Name("one"), "two")));
        cu.addImport("one.two.IgnoreImportWithinSamePackage");
        assertEquals(0, cu.getImports().size());
        cu.addImport("one.two.three.DoNotIgnoreImportWithinSubPackage");
        assertEquals(1, cu.getImports().size());
        assertEquals(
                "import one.two.three.DoNotIgnoreImportWithinSubPackage;" + LineSeparator.SYSTEM,
                cu.getImport(0).toString());
    }

    @Test
    void throwIllegalArgumentExceptionOnImportingAnonymousClass() {
        assertThrows(
                IllegalArgumentException.class,
                () -> cu.addImport(
                        new Comparator<Long>() {

                            @Override
                            public int compare(Long o1, Long o2) {
                                return o1.compareTo(o2);
                            }
                        }.getClass()));
    }

    @Test
    void throwIllegalArgumentExceptionOnImportingLocalClass() {
        class LocalClass implements Comparator<Long> {

            @Override
            public int compare(Long o1, Long o2) {
                return o1.compareTo(o2);
            }
        }
        Class<?> localClass = LocalClass.class;
        assertThrows(IllegalArgumentException.class, () -> cu.addImport(localClass));
    }

    @Test
    void ignoreImportsOfDefaultPackageClasses() {
        cu.addImport("MyImport");
        assertEquals(0, cu.getImports().size());
    }

    @Test
    void duplicateByAsterisk() {
        // check asterisk imports
        cu.addImport("my", false, true);
        cu.addImport("my.Import");
        cu.addImport("my.AnotherImport");
        cu.addImport("my.other.Import");
        assertEquals(2, cu.getImports().size());
        assertEquals("import my.*;" + LineSeparator.SYSTEM, cu.getImport(0).toString());
        assertEquals(
                "import my.other.Import;" + LineSeparator.SYSTEM,
                cu.getImport(1).toString());
        cu.addImport("my.other.*");
        assertEquals(2, cu.getImports().size());
        assertEquals("import my.*;" + LineSeparator.SYSTEM, cu.getImport(0).toString());
        assertEquals(
                "import my.other.*;" + LineSeparator.SYSTEM, cu.getImport(1).toString());
    }

    @Test
    void typesInTheJavaLangPackageDoNotNeedExplicitImports() {
        cu.addImport(String.class);
        assertEquals(0, cu.getImports().size());
    }

    @Test
    void typesInSubPackagesOfTheJavaLangPackageRequireExplicitImports() {
        cu.addImport(ElementType.class);
        assertEquals(1, cu.getImports().size());
        assertEquals(
                "import java.lang.annotation.ElementType;" + LineSeparator.SYSTEM,
                cu.getImport(0).toString());
    }

    @Test
    void doNotAddDuplicateImportsByClass() {
        cu.addImport(Map.class);
        cu.addImport(Map.class);
        assertEquals(1, cu.getImports().size());
    }

    @Test
    void doNotAddDuplicateImportsByString() {
        cu.addImport(Map.class);
        cu.addImport("java.util.Map");
        assertEquals(1, cu.getImports().size());
    }

    @Test
    void doNotAddDuplicateImportsByStringAndFlags() {
        cu.addImport(Map.class);
        cu.addImport("java.util.Map", false, false);
        assertEquals(1, cu.getImports().size());
    }

    @Test
    void doNotAddDuplicateImportsByImportDeclaration() {
        cu.addImport(Map.class);
        cu.addImport(parseImport("import java.util.Map;"));
        assertEquals(1, cu.getImports().size());
    }

    @Test
    void testAddImportArrayTypes() {
        cu.addImport(CompilationUnit[][][].class);
        cu.addImport(int[][][].class);
        cu.addImport(Integer[][][].class);
        cu.addImport(List[][][].class);
        assertEquals(2, cu.getImports().size());
        assertEquals(
                "com.github.javaparser.ast.CompilationUnit", cu.getImport(0).getNameAsString());
        assertEquals("java.util.List", cu.getImport(1).getNameAsString());
    }

    class testInnerClass {}

    @Test
    void testAddImportAnonymousClass() {
        cu.addImport(testInnerClass.class);
        assertEquals(
                "import " + testInnerClass.class.getCanonicalName().replace("$", ".") + ";" + LineSeparator.SYSTEM,
                cu.getImport(0).toString());
    }

    @Test
    void testAddClass() {
        ClassOrInterfaceDeclaration myClassDeclaration = cu.addClass("testClass", PRIVATE);
        assertEquals(1, cu.getTypes().size());
        assertEquals("testClass", cu.getType(0).getNameAsString());
        assertEquals(ClassOrInterfaceDeclaration.class, cu.getType(0).getClass());
        assertTrue(myClassDeclaration.isPrivate());
        assertFalse(myClassDeclaration.isInterface());
    }

    @Test
    void testAddInterface() {
        ClassOrInterfaceDeclaration myInterfaceDeclaration = cu.addInterface("testInterface");
        assertEquals(1, cu.getTypes().size());
        assertEquals("testInterface", cu.getType(0).getNameAsString());
        assertTrue(myInterfaceDeclaration.isPublic());
        assertEquals(ClassOrInterfaceDeclaration.class, cu.getType(0).getClass());
        assertTrue(myInterfaceDeclaration.isInterface());
    }

    @Test
    void testAddEnum() {
        EnumDeclaration myEnumDeclaration = cu.addEnum("test");
        assertEquals(1, cu.getTypes().size());
        assertEquals("test", cu.getType(0).getNameAsString());
        assertTrue(myEnumDeclaration.isPublic());
        assertEquals(EnumDeclaration.class, cu.getType(0).getClass());
    }

    @Test
    void testAddAnnotationDeclaration() {
        AnnotationDeclaration myAnnotationDeclaration = cu.addAnnotationDeclaration("test");
        assertEquals(1, cu.getTypes().size());
        assertEquals("test", cu.getType(0).getNameAsString());
        assertTrue(myAnnotationDeclaration.isPublic());
        assertEquals(AnnotationDeclaration.class, cu.getType(0).getClass());
    }

    @Test
    void testAddTypeWithRecordDeclaration() {
        RecordDeclaration myRecordDeclaration = new RecordDeclaration(Modifier.createModifierList(PUBLIC), "test");
        cu.addType(myRecordDeclaration);
        assertEquals(1, cu.getTypes().size());
        assertEquals("test", cu.getType(0).getNameAsString());
        assertTrue(myRecordDeclaration.isPublic());
        assertTrue(myRecordDeclaration.isFinal());
        assertEquals(RecordDeclaration.class, cu.getType(0).getClass());
    }

    @Test
    void testGetClassByName() {
        assertEquals(cu.addClass("test"), cu.getClassByName("test").get());
    }

    @Test
    void testGetInterfaceByName() {
        assertEquals(cu.addInterface("test"), cu.getInterfaceByName("test").get());
    }

    @Test
    void testGetEnumByName() {
        assertEquals(cu.addEnum("test"), cu.getEnumByName("test").get());
    }

    @Test
    void testGetAnnotationDeclarationByName() {
        assertEquals(
                cu.addAnnotationDeclaration("test"),
                cu.getAnnotationDeclarationByName("test").get());
    }

    @Test
    void testGetRecordByName() {
        assertEquals(
                cu.addType(new RecordDeclaration(Modifier.createModifierList(), "test"))
                        .getType(0),
                cu.getRecordByName("test").get());
    }
}
