/*
 * 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.resolution.javaparser;

import static com.github.javaparser.ParserConfiguration.LanguageLevel.JAVA_10;
import static com.github.javaparser.Providers.provider;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

import com.github.javaparser.JavaParser;
import com.github.javaparser.ParseStart;
import com.github.javaparser.ParserConfiguration;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.type.VarType;
import com.github.javaparser.resolution.TypeSolver;
import com.github.javaparser.resolution.model.typesystem.ReferenceTypeImpl;
import com.github.javaparser.resolution.types.ResolvedPrimitiveType;
import com.github.javaparser.resolution.types.ResolvedType;
import com.github.javaparser.symbolsolver.JavaSymbolSolver;
import com.github.javaparser.symbolsolver.reflectionmodel.ReflectionClassDeclaration;
import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
import org.junit.jupiter.api.Test;

class VarTypeTest {
    private final TypeSolver typeSolver = new ReflectionTypeSolver();
    private final JavaParser javaParser = new JavaParser(
            new ParserConfiguration().setLanguageLevel(JAVA_10).setSymbolResolver(new JavaSymbolSolver(typeSolver)));

    @Test
    void resolveAPrimitive() {
        CompilationUnit ast = javaParser
                .parse(ParseStart.COMPILATION_UNIT, provider("class X{void x(){var abc = 1;}}"))
                .getResult()
                .get();
        VarType varType = ast.findFirst(VarType.class).get();

        ResolvedType resolvedType = varType.resolve();

        assertEquals(ResolvedPrimitiveType.INT, resolvedType);
    }

    @Test
    void resolveAReferenceType() {
        CompilationUnit ast = javaParser
                .parse(ParseStart.COMPILATION_UNIT, provider("class X{void x(){var abc = \"\";}}"))
                .getResult()
                .get();
        VarType varType = ast.findFirst(VarType.class).get();

        ResolvedType resolvedType = varType.resolve();

        assertEquals(new ReferenceTypeImpl(new ReflectionClassDeclaration(String.class, typeSolver)), resolvedType);
    }

    @Test
    void failResolveNoInitializer() {
        assertThrows(IllegalStateException.class, () -> {
            CompilationUnit ast = javaParser
                    .parse(ParseStart.COMPILATION_UNIT, provider("class X{void x(){var abc;}}"))
                    .getResult()
                    .get();
            VarType varType = ast.findFirst(VarType.class).get();
            varType.resolve();
        });
    }

    @Test
    void failResolveWrongLocation() {
        assertThrows(IllegalStateException.class, () -> {
            CompilationUnit ast = javaParser
                    .parse(ParseStart.COMPILATION_UNIT, provider("class X{void x(var x){};}"))
                    .getResult()
                    .get();
            VarType varType = ast.findFirst(VarType.class).get();
            varType.resolve();
        });
    }
}
