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

import com.oracle.truffle.api.dsl.Fallback;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.runtime.BigInt;
import com.oracle.truffle.js.runtime.JSRuntime;

import java.util.Set;

public abstract class IsIdenticalIntegerNode extends IsIdenticalBaseNode {

    private final int integer;

    protected IsIdenticalIntegerNode(JavaScriptNode operand, int integer, boolean leftConstant) {
        super(operand, leftConstant);
        this.integer = integer;
    }

    @Specialization
    protected boolean doInt(int a) {
        return a == integer;
    }

    @Specialization
    protected boolean doDouble(double a) {
        return a == integer;
    }

    @Specialization
    protected boolean doBigInt(@SuppressWarnings("unused") BigInt a) {
        return false;
    }

    // long etc could come via Interop
    @Specialization(guards = "isJavaNumber(a)")
    protected boolean doJavaNumber(Object a) {
        double doubleValue = JSRuntime.toDouble(a);
        return doubleValue == integer;
    }

    @Fallback
    protected boolean doOther(@SuppressWarnings("unused") Object other) {
        return false;
    }

    public static IsIdenticalIntegerNode create(int integer, JavaScriptNode operand, boolean leftConstant) {
        return IsIdenticalIntegerNodeGen.create(operand, integer, leftConstant);
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set<Class<? extends Tag>> materializedTags) {
        return create(integer, cloneUninitialized(getOperand(), materializedTags), leftConstant);
    }

    @Override
    protected Object getConstantValue() {
        return integer;
    }
}