package io.gitlab.jfronny.muscript.ast.math;

import io.gitlab.jfronny.muscript.compiler.ExprWriter;
import io.gitlab.jfronny.muscript.compiler.Order;
import io.gitlab.jfronny.muscript.data.Scope;
import io.gitlab.jfronny.muscript.ast.Expr;
import io.gitlab.jfronny.muscript.ast.NumberExpr;
import io.gitlab.jfronny.muscript.ast.literal.NumberLiteral;

import java.io.IOException;

public class Invert extends NumberExpr {
    public final NumberExpr inner;

    public Invert(int chStart, int chEnd, NumberExpr inner) {
        super(Order.Unary, chStart, chEnd);
        this.inner = inner;
    }

    @Override
    public Double get(Scope dataRoot) {
        return -inner.get(dataRoot);
    }

    @Override
    public NumberExpr optimize() {
        NumberExpr inner = this.inner.optimize();
        if (inner instanceof Invert invert) return invert.inner;
        if (inner instanceof NumberLiteral literal) return Expr.literal(chStart, chEnd, -literal.value);
        if (inner instanceof Minus minus) return new Minus(chStart, chEnd, minus.subtrahend, minus.minuend).optimize();
        return new Invert(chStart, chEnd, inner);
    }

    @Override
    public void decompile(ExprWriter writer) throws IOException {
        writer.append('-');
        parenthesize(inner, writer, false);
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof Invert invert && inner.equals(invert.inner);
    }
}