// Copyright © 2026 Mikhail Hogrefe
//
// This file is part of Malachite.
//
// Malachite is free software: you can redistribute it and/or modify it under the terms of the GNU
// Lesser General Public License (LGPL) as published by the Free Software Foundation; either version
// 3 of the License, or (at your option) any later version. See <https://www.gnu.org/licenses/>.
use crate::num::basic::unsigneds::PrimitiveUnsigned;
use crate::polynomial::Polynomial;
use crate::unsigned_polynomial::UnsignedPolynomial;
use alloc::vec::Vec;
use core::cmp::max;
// Adds the polynomials coefficient by coefficient with `ModAdd` for `T`, reading each coefficient
// through `coefficient`, which gives zero past the degree, and building the result with
// `from_coefficients_asc`, which trims. Nothing is shared with the implementation.
pub fn mod_add_naive<T: PrimitiveUnsigned>(
p: &UnsignedPolynomial<T>,
q: &UnsignedPolynomial<T>,
m: T,
) -> UnsignedPolynomial<T> {
let len = max(p.len(), q.len());
UnsignedPolynomial::from_coefficients_asc(
(0..len)
.map(|i| p.coefficient(i).mod_add(q.coefficient(i), m))
.collect::<Vec<T>>(),
)
}