use crate::FFT64Ref;
use poulpy_hal::{
    api::{TakeSlice, VecZnxBigAutomorphismInplaceTmpBytes, VecZnxBigNormalizeTmpBytes},
    layouts::{
        Backend, Module, Scratch, VecZnx, VecZnxBig, VecZnxBigOwned, VecZnxBigToMut, VecZnxBigToRef, VecZnxToMut, VecZnxToRef,
        ZnxInfos, ZnxView, ZnxViewMut,
    },
    oep::{
        TakeSliceImpl, VecZnxBigAddImpl, VecZnxBigAddInplaceImpl, VecZnxBigAddNormalImpl, VecZnxBigAddSmallImpl,
        VecZnxBigAddSmallInplaceImpl, VecZnxBigAllocBytesImpl, VecZnxBigAllocImpl, VecZnxBigAutomorphismImpl,
        VecZnxBigAutomorphismInplaceImpl, VecZnxBigAutomorphismInplaceTmpBytesImpl, VecZnxBigFromBytesImpl,
        VecZnxBigFromSmallImpl, VecZnxBigNegateImpl, VecZnxBigNegateInplaceImpl, VecZnxBigNormalizeImpl,
        VecZnxBigNormalizeTmpBytesImpl, VecZnxBigSubImpl, VecZnxBigSubInplaceImpl, VecZnxBigSubNegateInplaceImpl,
        VecZnxBigSubSmallAImpl, VecZnxBigSubSmallBImpl, VecZnxBigSubSmallInplaceImpl, VecZnxBigSubSmallNegateInplaceImpl,
    },
    reference::{
        fft64::vec_znx_big::{
            vec_znx_big_add, vec_znx_big_add_inplace, vec_znx_big_add_normal_ref, vec_znx_big_add_small,
            vec_znx_big_add_small_inplace, vec_znx_big_automorphism, vec_znx_big_automorphism_inplace,
            vec_znx_big_automorphism_inplace_tmp_bytes, vec_znx_big_negate, vec_znx_big_negate_inplace, vec_znx_big_normalize,
            vec_znx_big_normalize_tmp_bytes, vec_znx_big_sub, vec_znx_big_sub_inplace, vec_znx_big_sub_negate_inplace,
            vec_znx_big_sub_small_a, vec_znx_big_sub_small_a_inplace, vec_znx_big_sub_small_b, vec_znx_big_sub_small_b_inplace,
        },
        znx::{znx_copy_ref, znx_zero_ref},
    },
    source::Source,
};

unsafe impl VecZnxBigAllocBytesImpl for FFT64Ref {
    fn vec_znx_big_bytes_of_impl(n: usize, cols: usize, size: usize) -> usize {
        Self::layout_big_word_count() * n * cols * size * size_of::<f64>()
    }
}

unsafe impl VecZnxBigAllocImpl<Self> for FFT64Ref {
    fn vec_znx_big_alloc_impl(n: usize, cols: usize, size: usize) -> VecZnxBigOwned<Self> {
        VecZnxBig::alloc(n, cols, size)
    }
}

unsafe impl VecZnxBigFromBytesImpl<Self> for FFT64Ref {
    fn vec_znx_big_from_bytes_impl(n: usize, cols: usize, size: usize, bytes: Vec<u8>) -> VecZnxBigOwned<Self> {
        VecZnxBig::from_bytes(n, cols, size, bytes)
    }
}

unsafe impl VecZnxBigFromSmallImpl<Self> for FFT64Ref {
    fn vec_znx_big_from_small_impl<R, A>(res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxToRef,
    {
        let mut res: VecZnxBig<&mut [u8], FFT64Ref> = res.to_mut();
        let a: VecZnx<&[u8]> = a.to_ref();

        #[cfg(debug_assertions)]
        {
            assert_eq!(res.n(), a.n());
        }

        let res_size: usize = res.size();
        let a_size: usize = a.size();

        let min_size: usize = res_size.min(a_size);

        for j in 0..min_size {
            znx_copy_ref(res.at_mut(res_col, j), a.at(a_col, j));
        }

        for j in min_size..res_size {
            znx_zero_ref(res.at_mut(res_col, j));
        }
    }
}

unsafe impl VecZnxBigAddNormalImpl<Self> for FFT64Ref {
    fn add_normal_impl<R: VecZnxBigToMut<Self>>(
        _module: &Module<Self>,
        base2k: usize,
        res: &mut R,
        res_col: usize,
        k: usize,
        source: &mut Source,
        sigma: f64,
        bound: f64,
    ) {
        vec_znx_big_add_normal_ref(base2k, res, res_col, k, sigma, bound, source);
    }
}

unsafe impl VecZnxBigAddImpl<Self> for FFT64Ref {
    /// Adds `a` to `b` and stores the result on `c`.
    fn vec_znx_big_add_impl<R, A, B>(
        _module: &Module<Self>,
        res: &mut R,
        res_col: usize,
        a: &A,
        a_col: usize,
        b: &B,
        b_col: usize,
    ) where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
        B: VecZnxBigToRef<Self>,
    {
        vec_znx_big_add(res, res_col, a, a_col, b, b_col);
    }
}

unsafe impl VecZnxBigAddInplaceImpl<Self> for FFT64Ref {
    /// Adds `a` to `b` and stores the result on `b`.
    fn vec_znx_big_add_inplace_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
    {
        vec_znx_big_add_inplace(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigAddSmallImpl<Self> for FFT64Ref {
    /// Adds `a` to `b` and stores the result on `c`.
    fn vec_znx_big_add_small_impl<R, A, B>(
        _module: &Module<Self>,
        res: &mut R,
        res_col: usize,
        a: &A,
        a_col: usize,
        b: &B,
        b_col: usize,
    ) where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
        B: VecZnxToRef,
    {
        vec_znx_big_add_small(res, res_col, a, a_col, b, b_col);
    }
}

unsafe impl VecZnxBigAddSmallInplaceImpl<Self> for FFT64Ref {
    /// Adds `a` to `b` and stores the result on `b`.
    fn vec_znx_big_add_small_inplace_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxToRef,
    {
        vec_znx_big_add_small_inplace(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigSubImpl<Self> for FFT64Ref {
    /// Subtracts `a` to `b` and stores the result on `c`.
    fn vec_znx_big_sub_impl<R, A, B>(
        _module: &Module<Self>,
        res: &mut R,
        res_col: usize,
        a: &A,
        a_col: usize,
        b: &B,
        b_col: usize,
    ) where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
        B: VecZnxBigToRef<Self>,
    {
        vec_znx_big_sub(res, res_col, a, a_col, b, b_col);
    }
}

unsafe impl VecZnxBigSubInplaceImpl<Self> for FFT64Ref {
    /// Subtracts `a` from `b` and stores the result on `b`.
    fn vec_znx_big_sub_inplace_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
    {
        vec_znx_big_sub_inplace(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigSubNegateInplaceImpl<Self> for FFT64Ref {
    /// Subtracts `b` from `a` and stores the result on `b`.
    fn vec_znx_big_sub_negate_inplace_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
    {
        vec_znx_big_sub_negate_inplace(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigSubSmallAImpl<Self> for FFT64Ref {
    /// Subtracts `b` from `a` and stores the result on `c`.
    fn vec_znx_big_sub_small_a_impl<R, A, B>(
        _module: &Module<Self>,
        res: &mut R,
        res_col: usize,
        a: &A,
        a_col: usize,
        b: &B,
        b_col: usize,
    ) where
        R: VecZnxBigToMut<Self>,
        A: VecZnxToRef,
        B: VecZnxBigToRef<Self>,
    {
        vec_znx_big_sub_small_a(res, res_col, a, a_col, b, b_col);
    }
}

unsafe impl VecZnxBigSubSmallInplaceImpl<Self> for FFT64Ref {
    /// Subtracts `a` from `res` and stores the result on `res`.
    fn vec_znx_big_sub_small_inplace_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxToRef,
    {
        vec_znx_big_sub_small_a_inplace(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigSubSmallBImpl<Self> for FFT64Ref {
    /// Subtracts `b` from `a` and stores the result on `c`.
    fn vec_znx_big_sub_small_b_impl<R, A, B>(
        _module: &Module<Self>,
        res: &mut R,
        res_col: usize,
        a: &A,
        a_col: usize,
        b: &B,
        b_col: usize,
    ) where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
        B: VecZnxToRef,
    {
        vec_znx_big_sub_small_b(res, res_col, a, a_col, b, b_col);
    }
}

unsafe impl VecZnxBigSubSmallNegateInplaceImpl<Self> for FFT64Ref {
    /// Subtracts `res` from `a` and stores the result on `res`.
    fn vec_znx_big_sub_small_negate_inplace_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxToRef,
    {
        vec_znx_big_sub_small_b_inplace(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigNegateImpl<Self> for FFT64Ref {
    fn vec_znx_big_negate_impl<R, A>(_module: &Module<Self>, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
    {
        vec_znx_big_negate(res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigNegateInplaceImpl<Self> for FFT64Ref {
    fn vec_znx_big_negate_inplace_impl<R>(_module: &Module<Self>, res: &mut R, res_col: usize)
    where
        R: VecZnxBigToMut<Self>,
    {
        vec_znx_big_negate_inplace(res, res_col);
    }
}

unsafe impl VecZnxBigNormalizeTmpBytesImpl<Self> for FFT64Ref {
    fn vec_znx_big_normalize_tmp_bytes_impl(module: &Module<Self>) -> usize {
        vec_znx_big_normalize_tmp_bytes(module.n())
    }
}

unsafe impl VecZnxBigNormalizeImpl<Self> for FFT64Ref
where
    Self: TakeSliceImpl<Self>,
{
    fn vec_znx_big_normalize_impl<R, A>(
        module: &Module<Self>,
        res: &mut R,
        res_base2k: usize,
        res_offset: i64,
        res_col: usize,
        a: &A,
        a_base2k: usize,
        a_col: usize,
        scratch: &mut Scratch<Self>,
    ) where
        R: VecZnxToMut,
        A: VecZnxBigToRef<Self>,
    {
        let (carry, _) = scratch.take_slice(module.vec_znx_big_normalize_tmp_bytes() / size_of::<i64>());
        vec_znx_big_normalize(res, res_base2k, res_offset, res_col, a, a_base2k, a_col, carry);
    }
}

unsafe impl VecZnxBigAutomorphismImpl<Self> for FFT64Ref {
    /// Applies the automorphism X^i -> X^ik on `a` and stores the result on `b`.
    fn vec_znx_big_automorphism_impl<R, A>(_module: &Module<Self>, p: i64, res: &mut R, res_col: usize, a: &A, a_col: usize)
    where
        R: VecZnxBigToMut<Self>,
        A: VecZnxBigToRef<Self>,
    {
        vec_znx_big_automorphism(p, res, res_col, a, a_col);
    }
}

unsafe impl VecZnxBigAutomorphismInplaceTmpBytesImpl<Self> for FFT64Ref {
    fn vec_znx_big_automorphism_inplace_tmp_bytes_impl(module: &Module<Self>) -> usize {
        vec_znx_big_automorphism_inplace_tmp_bytes(module.n())
    }
}

unsafe impl VecZnxBigAutomorphismInplaceImpl<Self> for FFT64Ref
where
    Module<Self>: VecZnxBigAutomorphismInplaceTmpBytes,
{
    /// Applies the automorphism X^i -> X^ik on `a` and stores the result on `a`.
    fn vec_znx_big_automorphism_inplace_impl<R>(
        module: &Module<Self>,
        p: i64,
        res: &mut R,
        res_col: usize,
        scratch: &mut Scratch<Self>,
    ) where
        R: VecZnxBigToMut<Self>,
    {
        let (tmp, _) = scratch.take_slice(module.vec_znx_big_automorphism_inplace_tmp_bytes() / size_of::<i64>());
        vec_znx_big_automorphism_inplace(p, res, res_col, tmp);
    }
}