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 * The Universal Permissive License (UPL), Version 1.0
 *
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 * person obtaining a copy of this software, associated documentation and/or
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package com.oracle.truffle.js.runtime.java;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.object.Shape;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.builtins.JSConstructor;
import com.oracle.truffle.js.runtime.builtins.JSConstructorFactory;
import com.oracle.truffle.js.runtime.builtins.JSNonProxy;
import com.oracle.truffle.js.runtime.builtins.JSObjectFactory;
import com.oracle.truffle.js.runtime.builtins.PrototypeSupplier;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.objects.JSObjectUtil;

public final class JavaImporter extends JSNonProxy implements JSConstructorFactory.Default, PrototypeSupplier {
    public static final String CLASS_NAME = "JavaImporter";

    private static final JavaImporter INSTANCE = new JavaImporter();

    private JavaImporter() {
    }

    @Override
    public String getClassName() {
        return CLASS_NAME;
    }

    @Override
    public String getClassName(DynamicObject object) {
        return getClassName();
    }

    @Override
    public String toString() {
        return CLASS_NAME;
    }

    public static DynamicObject create(JSContext context, Object[] value) {
        JSRealm realm = context.getRealm();
        JSObjectFactory factory = context.getJavaImporterFactory();
        JavaImporterObject obj = new JavaImporterObject(factory.getShape(realm), value);
        factory.initProto(obj, realm);
        assert isJavaImporter(obj);
        return context.trackAllocation(obj);
    }

    public static boolean isJavaImporter(Object obj) {
        return obj instanceof JavaImporterObject;
    }

    @Override
    public boolean hasOwnProperty(DynamicObject thisObj, Object name) {
        return getOwnHelper(thisObj, thisObj, name, null) != null;
    }

    @TruffleBoundary
    @Override
    public Object getOwnHelper(DynamicObject store, Object thisObj, Object name, Node encapsulatingNode) {
        if (name instanceof String) {
            Object[] packages = getPackages(store);
            JSRealm realm = JSObject.getJSContext(store).getRealm();
            for (Object pkg : packages) {
                if (pkg instanceof JavaPackageObject) {
                    JavaPackageObject javaPackage = (JavaPackageObject) pkg;
                    Object found = JavaPackage.getClass(realm, javaPackage, (String) name, Object.class);
                    if (found != null) {
                        return found;
                    }
                }
            }
        }
        return null;
    }

    public static Object[] getPackages(DynamicObject importer) {
        assert JavaImporter.isJavaImporter(importer);
        return ((JavaImporterObject) importer).getPackages();
    }

    @Override
    public String toDisplayStringImpl(DynamicObject object, int depth, boolean allowSideEffects, JSContext context) {
        return "[JavaImporter]";
    }

    @Override
    public DynamicObject createPrototype(final JSRealm realm, DynamicObject ctor) {
        JSContext context = realm.getContext();
        DynamicObject prototype = JSObjectUtil.createOrdinaryPrototypeObject(realm);
        JSObjectUtil.putToStringTag(prototype, CLASS_NAME);
        JSObjectUtil.putConstructorProperty(context, prototype, ctor);
        return prototype;
    }

    @Override
    public Shape makeInitialShape(JSContext context, DynamicObject prototype) {
        Shape initialShape = JSObjectUtil.getProtoChildShape(prototype, instance(), context);
        return initialShape;
    }

    public static JSConstructor createConstructor(JSRealm realm) {
        return instance().createConstructorAndPrototype(realm);
    }

    public static JavaImporter instance() {
        return INSTANCE;
    }

    @Override
    public DynamicObject getIntrinsicDefaultProto(JSRealm realm) {
        return realm.getJavaImporterPrototype();
    }
}