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

use crate::{Fq, Fr};

#[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 = 1
    #[rustfmt::skip]
    const COEFF_B: Fq = field_new!(Fq, BigInteger384([
        0x2cdffffffffff68,
        0x51409f837fffffb1,
        0x9f7db3a98a7d3ff2,
        0x7b4e97b76e7c6305,
        0x4cf495bf803c84e8,
        0x8d6661e2fdf49a,
    ]));

    /// COFACTOR = (x - 1)^2 / 3  = 30631250834960419227450344600217059328
    const COFACTOR: &'static [u64] = &[0x0, 0x170b5d4430000000];

    /// COFACTOR_INV = COFACTOR^{-1} mod r
    /// = 5285428838741532253824584287042945485047145357130994810877
    #[rustfmt::skip]
    const COFACTOR_INV: Fr = field_new!(Fr, BigInteger256([
        2013239619100046060,
        4201184776506987597,
        2526766393982337036,
        1114629510922847535,
    ]));

    /// 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 =
/// 81937999373150964239938255573465948239988671502647976594219695644855304257327692006745978603320413799295628339695
#[rustfmt::skip]
pub const G1_GENERATOR_X: Fq = field_new!(Fq, BigInteger384([
    0x260f33b9772451f4,
    0xc54dd773169d5658,
    0x5c1551c469a510dd,
    0x761662e4425e1698,
    0xc97d78cc6f065272,
    0xa41206b361fd4d,
]));

/// G1_GENERATOR_Y =
/// 241266749859715473739788878240585681733927191168601896383759122102112907357779751001206799952863815012735208165030
#[rustfmt::skip]
pub const G1_GENERATOR_Y: Fq = field_new!(Fq, BigInteger384([
    0x8193961fb8cb81f3,
    0x638d4c5f44adb8,
    0xfafaf3dad4daf54a,
    0xc27849e2d655cd18,
    0x2ec3ddb401d52814,
    0x7da93326303c71,
]));