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

import com.oracle.truffle.api.dsl.Cached;
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.runtime.Errors;
import com.oracle.truffle.js.runtime.array.ScriptArray;
import com.oracle.truffle.js.runtime.objects.JSObject;

public abstract class TestArrayNode extends JavaScriptBaseNode {

    protected enum Test {
        HasHoles,
    }

    protected static final int MAX_TYPE_COUNT = 4;

    protected final Test test;

    protected TestArrayNode(Test test) {
        this.test = test;
    }

    protected static ScriptArray getArrayType(DynamicObject target) {
        return JSObject.getArray(target);
    }

    protected static TestArrayNode create(Test test) {
        return TestArrayNodeGen.create(test);
    }

    public static TestArrayNode createHasHoles() {
        return create(Test.HasHoles);
    }

    public abstract boolean executeBoolean(DynamicObject target);

    @Specialization(guards = {"arrayType.isInstance(getArrayType(target))", "arrayType.isStatelessType()"}, limit = "MAX_TYPE_COUNT")
    protected final boolean doCached(DynamicObject target,
                    @Cached("getArrayType(target)") ScriptArray arrayType) {
        if (test == Test.HasHoles) {
            return arrayType.hasHoles(target);
        } else {
            throw Errors.shouldNotReachHere();
        }
    }

    @Specialization(replaces = "doCached")
    protected final boolean doUncached(DynamicObject target) {
        ScriptArray arrayType = getArrayType(target);
        return doCached(target, arrayType);
    }
}