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// Copyright (C) 2019-2021 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 crate::{
    templates::{
        short_weierstrass_jacobian::{Affine as SWAffine, Projective as SWProjective},
        twisted_edwards_extended::{Affine as TEAffine, Projective as TEProjective},
    },
    traits::{ProjectiveCurve, ShortWeierstrassParameters, TwistedEdwardsParameters},
};
use snarkvm_fields::{ConstraintFieldError, Field, ToConstraintField};

impl<M: TwistedEdwardsParameters, F: Field> ToConstraintField<F> for TEAffine<M>
where
    M::BaseField: ToConstraintField<F>,
{
    #[inline]
    fn to_field_elements(&self) -> Result<Vec<F>, ConstraintFieldError> {
        let mut x_fe = self.x.to_field_elements()?;
        let y_fe = self.y.to_field_elements()?;
        x_fe.extend_from_slice(&y_fe);
        Ok(x_fe)
    }
}

impl<M: TwistedEdwardsParameters, F: Field> ToConstraintField<F> for TEProjective<M>
where
    M::BaseField: ToConstraintField<F>,
{
    #[inline]
    fn to_field_elements(&self) -> Result<Vec<F>, ConstraintFieldError> {
        let affine = self.into_affine();
        let mut x_fe = affine.x.to_field_elements()?;
        let y_fe = affine.y.to_field_elements()?;
        x_fe.extend_from_slice(&y_fe);
        Ok(x_fe)
    }
}

impl<M: ShortWeierstrassParameters, F: Field> ToConstraintField<F> for SWAffine<M>
where
    M::BaseField: ToConstraintField<F>,
{
    #[inline]
    fn to_field_elements(&self) -> Result<Vec<F>, ConstraintFieldError> {
        let mut x_fe = self.x.to_field_elements()?;
        let y_fe = self.y.to_field_elements()?;
        let infinity_fe = self.infinity.to_field_elements()?;
        x_fe.extend_from_slice(&y_fe);
        x_fe.extend_from_slice(&infinity_fe);
        Ok(x_fe)
    }
}

impl<M: ShortWeierstrassParameters, F: Field> ToConstraintField<F> for SWProjective<M>
where
    M::BaseField: ToConstraintField<F>,
{
    #[inline]
    fn to_field_elements(&self) -> Result<Vec<F>, ConstraintFieldError> {
        let affine = self.into_affine();
        let mut x_fe = affine.x.to_field_elements()?;
        let y_fe = affine.y.to_field_elements()?;
        x_fe.extend_from_slice(&y_fe);
        Ok(x_fe)
    }
}