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

import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.object.DynamicObject;
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.builtins.JSRegExp;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.util.TRegexUtil;

public abstract class CreateRegExpNode extends JavaScriptBaseNode {

    @Child private TRegexUtil.InteropReadMemberNode readNamedCG = TRegexUtil.InteropReadMemberNode.create();
    @Child private TRegexUtil.InteropIsNullNode isNamedCGNull = TRegexUtil.InteropIsNullNode.create();
    @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 DynamicObject createRegExp(Object compiledRegex) {
        return createRegExp(compiledRegex, true);
    }

    public DynamicObject createRegExp(Object compiledRegex, boolean legacyFeaturesEnabled) {
        return execute(compiledRegex, legacyFeaturesEnabled);
    }

    protected abstract DynamicObject execute(Object compiledRegex, boolean legacyFeaturesEnabled);

    @Specialization(guards = {"!hasNamedCG(compiledRegex)"})
    protected DynamicObject createWithoutNamedCG(Object compiledRegex, boolean legacyFeaturesEnabled) {
        DynamicObject reObj = JSRegExp.create(context, compiledRegex, null, legacyFeaturesEnabled);
        setLastIndex.setValueInt(reObj, 0);
        return reObj;
    }

    @Specialization(guards = {"hasNamedCG(compiledRegex)"})
    protected DynamicObject createWithNamedCG(Object compiledRegex, boolean legacyFeaturesEnabled) {
        Object namedCaptureGroups = readNamedCG.execute(compiledRegex, TRegexUtil.Props.CompiledRegex.GROUPS);
        DynamicObject reObj = JSRegExp.create(context, compiledRegex, JSRegExp.buildGroupsFactory(context, namedCaptureGroups), legacyFeaturesEnabled);
        setLastIndex.setValueInt(reObj, 0);
        return reObj;
    }

    protected boolean hasNamedCG(Object compiledRegex) {
        Object namedCaptureGroups = readNamedCG.execute(compiledRegex, TRegexUtil.Props.CompiledRegex.GROUPS);
        return !isNamedCGNull.execute(namedCaptureGroups);
    }
}