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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
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package com.oracle.truffle.js.runtime.builtins;

import com.oracle.truffle.api.object.Shape;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.js.builtins.SetPrototypeBuiltins;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.JSRuntime;
import com.oracle.truffle.js.runtime.Strings;
import com.oracle.truffle.js.runtime.Symbol;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.objects.JSObjectUtil;
import com.oracle.truffle.js.runtime.util.JSHashMap;

public final class JSSet extends JSNonProxy implements JSConstructorFactory.Default.WithSpecies, PrototypeSupplier {

    public static final JSSet INSTANCE = new JSSet();

    public static final TruffleString CLASS_NAME = Strings.constant("Set");
    public static final TruffleString PROTOTYPE_NAME = Strings.constant("Set.prototype");

    private JSSet() {
    }

    public static JSSetObject create(JSContext context, JSRealm realm) {
        JSObjectFactory factory = context.getSetFactory();
        return create(factory, realm, factory.getPrototype(realm));
    }

    public static JSSetObject create(JSContext context, JSRealm realm, JSHashMap internalMap) {
        JSObjectFactory factory = context.getSetFactory();
        return create(factory, realm, factory.getPrototype(realm), internalMap);
    }

    public static JSSetObject create(JSContext context, JSRealm realm, JSDynamicObject proto) {
        JSObjectFactory factory = context.getSetFactory();
        return create(factory, realm, proto);
    }

    private static JSSetObject create(JSObjectFactory factory, JSRealm realm, JSDynamicObject proto) {
        return create(factory, realm, proto, new JSHashMap());
    }

    private static JSSetObject create(JSObjectFactory factory, JSRealm realm, JSDynamicObject proto, JSHashMap internalMap) {
        var shape = factory.getShape(realm, proto);
        var newObj = factory.initProto(new JSSetObject(shape, proto, internalMap), realm, proto);
        return factory.trackAllocation(newObj);
    }

    public static Object normalize(Object value) {
        if (value instanceof Double) {
            return normalizeDouble((Double) value);
        }
        return value;
    }

    public static Object normalizeDouble(double value) {
        if (JSRuntime.isNegativeZero(value)) {
            return 0;
        } else if (JSRuntime.doubleIsRepresentableAsInt(value)) {
            return (int) value;
        }
        return value;
    }

    public static JSHashMap getInternalSet(JSDynamicObject obj) {
        assert isJSSet(obj);
        return ((JSSetObject) obj).getMap();
    }

    public static int getSetSize(JSDynamicObject obj) {
        assert isJSSet(obj);
        return getInternalSet(obj).size();
    }

    @Override
    public JSDynamicObject createPrototype(final JSRealm realm, JSFunctionObject ctor) {
        JSContext ctx = realm.getContext();
        JSObject prototype = JSObjectUtil.createOrdinaryPrototypeObject(realm);
        JSObjectUtil.putConstructorProperty(prototype, ctor);
        // sets the size just for the prototype
        JSObjectUtil.putAccessorsFromContainer(realm, prototype, SetPrototypeBuiltins.BUILTINS);
        JSObjectUtil.putFunctionsFromContainer(realm, prototype, SetPrototypeBuiltins.BUILTINS);
        JSObjectUtil.putToStringTag(prototype, CLASS_NAME);
        Object values = JSDynamicObject.getOrNull(prototype, Strings.VALUES);
        // The initial value of the keys and @@iterator properties is the same function object as
        // the initial value of the values property.
        JSObjectUtil.putDataProperty(prototype, Strings.KEYS, values, JSAttributes.getDefaultNotEnumerable());
        JSObjectUtil.putDataProperty(prototype, Symbol.SYMBOL_ITERATOR, values, JSAttributes.getDefaultNotEnumerable());
        if (ctx.getLanguageOptions().newSetMethods()) {
            JSObjectUtil.putFunctionsFromContainer(realm, prototype, SetPrototypeBuiltins.NEW_SET_BUILTINS);
        }
        return prototype;
    }

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

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

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

    public static boolean isJSSet(Object obj) {
        return obj instanceof JSSetObject;
    }

    @Override
    public JSDynamicObject getIntrinsicDefaultProto(JSRealm realm) {
        return realm.getSetPrototype();
    }

}