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 Plus extends NumberExpr {
    public final NumberExpr augend;
    public final NumberExpr addend;

    public Plus(int chStart, int chEnd, NumberExpr augend, NumberExpr addend) {
        super(Order.Term, chStart, chEnd);
        this.augend = augend;
        this.addend = addend;
    }

    @Override
    public Double get(Scope dataRoot) {
        return augend.get(dataRoot) + addend.get(dataRoot);
    }

    @Override
    public NumberExpr optimize() {
        NumberExpr augend = this.augend.optimize();
        NumberExpr addend = this.addend.optimize();
        if (augend instanceof NumberLiteral litU && addend instanceof NumberLiteral litD)
            return Expr.literal(chStart, chEnd, litU.value + litD.value);
        return new Plus(chStart, chEnd, augend, addend);
    }

    @Override
    public void decompile(ExprWriter writer) throws IOException {
        parenthesize(augend, writer, false);
        writer.append(" + ");
        parenthesize(addend, writer, true);
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof Plus plus && augend.equals(plus.augend) && addend.equals(plus.addend);
    }
}