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 Modulo extends NumberExpr {
    private final NumberExpr dividend;
    private final NumberExpr divisor;

    public Modulo(int chStart, int chEnd, NumberExpr dividend, NumberExpr divisor) {
        super(Order.Factor, chStart, chEnd);
        this.dividend = dividend;
        this.divisor = divisor;
    }

    @Override
    public Double get(Scope dataRoot) {
        return dividend.get(dataRoot) % divisor.get(dataRoot);
    }

    @Override
    public NumberExpr optimize() {
        NumberExpr dividend = this.dividend.optimize();
        NumberExpr divisor = this.divisor.optimize();
        if (dividend instanceof NumberLiteral litD && divisor instanceof NumberLiteral litS)
            return Expr.literal(chStart, chEnd, litD.value % litS.value);
        return new Modulo(chStart, chEnd, dividend, divisor);
    }

    @Override
    public void decompile(ExprWriter writer) throws IOException {
        parenthesize(dividend, writer, false);
        writer.append(" % ");
        parenthesize(divisor, writer, true);
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof Modulo modulo && dividend.equals(modulo.dividend) && divisor.equals(modulo.divisor);
    }
}