/*
 * Copyright (C) 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.symbolsolver;

import static org.junit.jupiter.api.Assertions.assertEquals;

import com.github.javaparser.ParserConfiguration;
import com.github.javaparser.StaticJavaParser;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.expr.ThisExpr;
import com.github.javaparser.symbolsolver.resolution.AbstractResolutionTest;
import com.github.javaparser.symbolsolver.resolution.typesolvers.CombinedTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.JavaParserTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
import java.nio.file.Path;
import java.util.List;
import org.junit.jupiter.api.Test;

public class Issue2909Test extends AbstractResolutionTest {

    @Test
    void testResolvingLocallyFromCompleteReferenceToInnerClass() {
        ParserConfiguration config = new ParserConfiguration();
        config.setSymbolResolver(new JavaSymbolSolver(new ReflectionTypeSolver(false)));
        StaticJavaParser.setConfiguration(config);

        String s = "public class Program {\n" + "\n"
                + "    public class OuterClass {\n"
                + "        int field = 0;\n"
                + "\n"
                + "        public class InnerClass {\n"
                + "            InnerClass() {\n"
                + "               OuterClass outer = Program.OuterClass.this;\n"
                + "               Program.OuterClass.this.field = 1;\n"
                + "            }\n"
                + "        }\n"
                + "    }\n"
                + "}";

        CompilationUnit cu = StaticJavaParser.parse(s);
        List<ThisExpr> exprs = cu.findAll(ThisExpr.class);
        exprs.forEach(expr -> {
            assertEquals("Program.OuterClass", expr.calculateResolvedType().describe());
        });
    }

    @Test
    void testResolvingLocallyFromPartialReferenceToInnerClass() {
        ParserConfiguration config = new ParserConfiguration();
        config.setSymbolResolver(new JavaSymbolSolver(new ReflectionTypeSolver(false)));
        StaticJavaParser.setConfiguration(config);

        String s = "public class Program {\n" + "\n"
                + "    public class OuterClass {\n"
                + "        int field = 0;\n"
                + "\n"
                + "        public class InnerClass {\n"
                + "            InnerClass() {\n"
                + "               OuterClass outer = OuterClass.this;\n"
                + "               OuterClass.this.field = 1;\n"
                + "            }\n"
                + "        }\n"
                + "    }\n"
                + "}";

        CompilationUnit cu = StaticJavaParser.parse(s);
        List<ThisExpr> exprs = cu.findAll(ThisExpr.class);
        exprs.forEach(expr -> {
            assertEquals("Program.OuterClass", expr.calculateResolvedType().describe());
        });
    }

    @Test
    void testInDepth() {
        Path rootSourceDir = adaptPath("src/test/resources/issue2909");

        ParserConfiguration config = new ParserConfiguration();
        CombinedTypeSolver cts = new CombinedTypeSolver(
                new ReflectionTypeSolver(false), new JavaParserTypeSolver(rootSourceDir.toFile()));
        config.setSymbolResolver(new JavaSymbolSolver(cts));
        StaticJavaParser.setConfiguration(config);

        String s = "package test;\n" + "\n"
                + "public class Program {\n"
                +
                //                "\n" +
                //                "    public class OuterClass {\n" +
                //                "    }\n" +
                "\n"
                + "    public class FarOuterClass {\n"
                + "\n"
                + "        public class OuterClass {\n"
                + "            int field = 0;\n"
                + "\n"
                + "            public class InnerClass {\n"
                + "                InnerClass() {\n"
                + "                    // Different cases to refer to enclosing type\n"
                + "                    OuterClass outer1 = OuterClass.this; // case1\n"
                + "                    OuterClass.this.field = 1; // case1\n"
                + "                    OuterClass outer2 = FarOuterClass.OuterClass.this; // case2\n"
                + "                    FarOuterClass.OuterClass.this.field = 1; // case2\n"
                + "                    OuterClass outer3 = Program.FarOuterClass.OuterClass.this; // case3\n"
                + "                    Program.FarOuterClass.OuterClass.this.field = 1; // case3\n"
                + "                    OuterClass outer4 = test.Program.FarOuterClass.OuterClass.this; // case4\n"
                + "                    test.Program.FarOuterClass.OuterClass.this.field = 1; // case4\n"
                + "                }\n"
                + "            }\n"
                + "        }\n"
                + "    }\n"
                + "\n"
                + "    public class OuterClass {\n"
                + "    }\n"
                + "}";

        CompilationUnit cu = StaticJavaParser.parse(s);
        List<ThisExpr> exprs = cu.findAll(ThisExpr.class);
        exprs.forEach(expr -> {
            assertEquals(
                    "test.Program.FarOuterClass.OuterClass",
                    expr.calculateResolvedType().describe());
        });
    }
}
