use crate::*;
use ark_ec::{
    bls12,
    models::{ModelParameters, SWModelParameters},
};
use ark_ff::{
    biginteger::{BigInteger256, BigInteger384},
    field_new, Zero,
};

pub type G1Affine = bls12::G1Affine<crate::Parameters>;
pub type G1Projective = bls12::G1Projective<crate::Parameters>;

#[derive(Clone, Default, PartialEq, Eq)]
pub struct Parameters;

impl ModelParameters for Parameters {
    type BaseField = Fq;
    type ScalarField = Fr;
}

impl SWModelParameters for Parameters {
    /// COEFF_A = 0
    const COEFF_A: Fq = field_new!(Fq, BigInteger384([0x0, 0x0, 0x0, 0x0, 0x0, 0x0]));

    /// COEFF_B = 4
    #[rustfmt::skip]
    const COEFF_B: Fq = field_new!(Fq, BigInteger384([
        0xaa270000000cfff3,
        0x53cc0032fc34000a,
        0x478fe97a6b0a807f,
        0xb1d37ebee6ba24d7,
        0x8ec9733bbf78ab2f,
        0x9d645513d83de7e,
    ]));

    /// COFACTOR = (x - 1)^2 / 3  = 76329603384216526031706109802092473003
    const COFACTOR: &'static [u64] = &[0x8c00aaab0000aaab, 0x396c8c005555e156];

    /// COFACTOR_INV = COFACTOR^{-1} mod r
    /// = 52435875175126190458656871551744051925719901746859129887267498875565241663483
    #[rustfmt::skip]
    const COFACTOR_INV: Fr = field_new!(Fr, BigInteger256([
        288839107172787499,
        1152722415086798946,
        2612889808468387987,
        5124657601728438008,
    ]));

    /// AFFINE_GENERATOR_COEFFS = (G1_GENERATOR_X, G1_GENERATOR_Y)
    const AFFINE_GENERATOR_COEFFS: (Self::BaseField, Self::BaseField) =
        (G1_GENERATOR_X, G1_GENERATOR_Y);

    #[inline(always)]
    fn mul_by_a(_: &Self::BaseField) -> Self::BaseField {
        Self::BaseField::zero()
    }
}

/// G1_GENERATOR_X =
/// 3685416753713387016781088315183077757961620795782546409894578378688607592378376318836054947676345821548104185464507
#[rustfmt::skip]
pub const G1_GENERATOR_X: Fq = field_new!(Fq, BigInteger384([
    0x5cb38790fd530c16,
    0x7817fc679976fff5,
    0x154f95c7143ba1c1,
    0xf0ae6acdf3d0e747,
    0xedce6ecc21dbf440,
    0x120177419e0bfb75,
]));

/// G1_GENERATOR_Y =
/// 1339506544944476473020471379941921221584933875938349620426543736416511423956333506472724655353366534992391756441569
#[rustfmt::skip]
pub const G1_GENERATOR_Y: Fq = field_new!(Fq, BigInteger384([
    0xbaac93d50ce72271,
    0x8c22631a7918fd8e,
    0xdd595f13570725ce,
    0x51ac582950405194,
    0xe1c8c3fad0059c0,
    0xbbc3efc5008a26a,
]));