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// Copyright (C) 2019-2022 Aleo Systems Inc.
// This file is part of the snarkVM library.

// The snarkVM library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The snarkVM library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the snarkVM library. If not, see <https://www.gnu.org/licenses/>.

use super::*;

impl<E: Environment> Equal for Field<E> {
    type Output = Boolean<E>;

    /// Returns `true` if `self` and `other` are equal.
    fn is_equal(&self, other: &Self) -> Self::Output {
        Boolean::new(self == other)
    }

    /// Returns `true` if `self` and `other` are *not* equal.
    fn is_not_equal(&self, other: &Self) -> Self::Output {
        Boolean::new(self != other)
    }
}

impl<E: Environment> Compare for Field<E> {
    type Output = Boolean<E>;

    /// Returns `true` if `self` is less than `other`.
    fn is_less_than(&self, other: &Self) -> Self::Output {
        Boolean::new(self.field < other.field)
    }

    /// Returns `true` if `self` is greater than `other`.
    fn is_greater_than(&self, other: &Self) -> Self::Output {
        other.is_less_than(self)
    }

    /// Returns `true` if `self` is less than or equal to `other`.
    fn is_less_than_or_equal(&self, other: &Self) -> Self::Output {
        other.is_greater_than_or_equal(self)
    }

    /// Returns `true` if `self` is greater than or equal to `other`.
    fn is_greater_than_or_equal(&self, other: &Self) -> Self::Output {
        !self.is_less_than(other)
    }
}

impl<E: Environment> Ternary for Field<E> {
    type Boolean = Boolean<E>;
    type Output = Self;

    /// Returns `first` if `condition` is `true`, otherwise returns `second`.
    fn ternary(condition: &Self::Boolean, first: &Self, second: &Self) -> Self::Output {
        match **condition {
            true => *first,
            false => *second,
        }
    }
}