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

import java.util.Set;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.runtime.Boundaries;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.Strings;
import com.oracle.truffle.js.runtime.builtins.JSArrayObject;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.objects.JSObjectUtil;

/**
 * ES6 12.2.9.3 Runtime Semantics: GetTemplateObject(templateLiteral).
 */
public abstract class GetTemplateObjectNode extends JavaScriptNode {
    protected final JSContext context;
    @Child private ArrayLiteralNode rawStrings;
    @Child private ArrayLiteralNode cookedStrings;
    private final Object identity;

    protected GetTemplateObjectNode(JSContext context, ArrayLiteralNode rawStrings, ArrayLiteralNode cookedStrings) {
        this.context = context;
        this.rawStrings = rawStrings;
        this.cookedStrings = cookedStrings;
        this.identity = this;
    }

    protected GetTemplateObjectNode(JSContext context, ArrayLiteralNode rawStrings, ArrayLiteralNode cookedStrings, Object identity) {
        this.context = context;
        this.rawStrings = rawStrings;
        this.cookedStrings = cookedStrings;
        this.identity = identity;
    }

    public static GetTemplateObjectNode create(JSContext context, ArrayLiteralNode rawStrings, ArrayLiteralNode cookedStrings) {
        return GetTemplateObjectNodeGen.create(context, rawStrings, cookedStrings);
    }

    @Specialization(guards = "!context.isMultiContext()", assumptions = "context.getSingleRealmAssumption()")
    protected JSDynamicObject doCached(@SuppressWarnings("unused") VirtualFrame frame,
                    @Cached(value = "doUncached(frame)", neverDefault = true) JSDynamicObject cachedTemplate) {
        return cachedTemplate;
    }

    @Specialization(replaces = "doCached")
    protected JSDynamicObject doUncached(VirtualFrame frame) {
        JSArrayObject cached = Boundaries.mapGet(getRealm().getTemplateRegistry(), identity);
        if (cached != null) {
            return cached;
        }
        cached = buildTemplateObject(frame);
        Boundaries.mapPut(getRealm().getTemplateRegistry(), identity, cached);
        return cached;
    }

    private JSArrayObject buildTemplateObject(VirtualFrame frame) {
        JSArrayObject template = cookedStrings.execute(frame);
        JSArrayObject rawObj = rawStrings.execute(frame);
        rawObj.setIntegrityLevel(true, true);
        JSObjectUtil.putDataProperty(template, Strings.RAW, rawObj, JSAttributes.notConfigurableNotEnumerableNotWritable());
        template.setIntegrityLevel(true, true);
        return template;
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set> materializedTags) {
        return GetTemplateObjectNodeGen.create(context, cloneUninitialized(rawStrings, materializedTags), cloneUninitialized(cookedStrings, materializedTags), identity);
    }
}