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package com.oracle.truffle.js.nodes.intl;

import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.nodes.access.PropertySetNode;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.builtins.JSRegExp;
import com.oracle.truffle.js.runtime.builtins.JSRegExpObject;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.util.TRegexUtil;

public abstract class CreateRegExpNode extends JavaScriptBaseNode {

    @Child private TRegexUtil.InteropReadMemberNode readNamedCG = TRegexUtil.InteropReadMemberNode.create();
    @Child private InteropLibrary isNamedCGNull = InteropLibrary.getFactory().createDispatched(3);
    @Child private PropertySetNode setLastIndex;
    private final JSContext context;

    protected CreateRegExpNode(JSContext context) {
        this.context = context;
        this.setLastIndex = PropertySetNode.createImpl(JSRegExp.LAST_INDEX, false, context, true, true, JSAttributes.notConfigurableNotEnumerableWritable());
    }

    public static CreateRegExpNode create(JSContext context) {
        return CreateRegExpNodeGen.create(context);
    }

    public final JSRegExpObject createRegExp(Object compiledRegex) {
        JSRealm realm = getRealm();
        return createRegExp(compiledRegex, true, realm, realm.getRegExpPrototype());
    }

    public final JSRegExpObject createRegExp(Object compiledRegex, boolean legacyFeaturesEnabled, JSRealm realm, JSDynamicObject proto) {
        Object namedCaptureGroups = readNamedCG.execute(null, compiledRegex, TRegexUtil.Props.CompiledRegex.GROUPS);
        boolean hasNamedCaptureGroups = !isNamedCGNull.isNull(namedCaptureGroups);
        return execute(compiledRegex, legacyFeaturesEnabled, realm, proto, namedCaptureGroups, hasNamedCaptureGroups);
    }

    protected abstract JSRegExpObject execute(Object compiledRegex, boolean legacyFeaturesEnabled, JSRealm realm, JSDynamicObject proto, Object namedCaptureGroups, boolean hasNamedCG);

    @Specialization(guards = {"!b(hasNamedCaptureGroups)"})
    protected JSRegExpObject createWithoutNamedCG(Object compiledRegex, boolean legacyFeaturesEnabled, JSRealm realm, JSDynamicObject proto,
                    @SuppressWarnings("unused") Object namedCaptureGroups, @SuppressWarnings("unused") boolean hasNamedCaptureGroups) {
        JSRegExpObject reObj = JSRegExp.create(context, realm, proto, compiledRegex, null, legacyFeaturesEnabled);
        setLastIndex.setValueInt(reObj, 0);
        return reObj;
    }

    @Specialization(guards = {"b(hasNamedCaptureGroups)"})
    protected JSRegExpObject createWithNamedCG(Object compiledRegex, boolean legacyFeaturesEnabled, JSRealm realm, JSDynamicObject proto,
                    Object namedCaptureGroups, @SuppressWarnings("unused") boolean hasNamedCaptureGroups) {
        JSRegExpObject reObj = JSRegExp.create(context, realm, proto, compiledRegex, JSRegExp.buildGroupsFactory(context, namedCaptureGroups), legacyFeaturesEnabled);
        setLastIndex.setValueInt(reObj, 0);
        return reObj;
    }

    // Workaround for SpotBugs warning: Useless condition
    static boolean b(boolean value) {
        return value;
    }
}