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use integer::Integer;
use malachite_base::num::comparison::traits::{OrdAbs, PartialOrdAbs};
use std::cmp::Ordering;

impl PartialOrdAbs for Integer {
    /// Compares the absolute values of two [`Integer`]s.
    ///
    /// See the documentation for the
    /// [`OrdAbs`](malachite_base::num::comparison::traits::OrdAbs) implementation.
    #[inline]
    fn partial_cmp_abs(&self, other: &Integer) -> Option<Ordering> {
        Some(self.cmp_abs(other))
    }
}

impl OrdAbs for Integer {
    /// Compares the absolute values of two [`Integer`]s.
    ///
    /// # Worst-case complexity
    /// $T(n) = O(n)$
    ///
    /// $M(n) = O(1)$
    ///
    /// where $T$ is time, $M$ is additional memory, and $n$ is
    /// `min(self.significant_bits(), other.significant_bits())`.
    ///
    /// # Examples
    /// ```
    /// extern crate malachite_base;
    ///
    /// use malachite_base::num::comparison::traits::PartialOrdAbs;
    /// use malachite_nz::integer::Integer;
    ///
    /// assert!(Integer::from(-123).lt_abs(&Integer::from(-124)));
    /// assert!(Integer::from(-123).le_abs(&Integer::from(-124)));
    /// assert!(Integer::from(-124).gt_abs(&Integer::from(-123)));
    /// assert!(Integer::from(-124).ge_abs(&Integer::from(-123)));
    /// ```
    fn cmp_abs(&self, other: &Integer) -> Ordering {
        self.abs.cmp(&other.abs)
    }
}