namespace Neo.Cryptography
{
    let _secp256k1: ECCurve;
    let _secp256r1: ECCurve;

    export class ECCurve
    {
        public Q: BigInteger;
        public A: ECFieldElement;
        public B: ECFieldElement;
        public N: BigInteger;
        public Infinity: ECPoint;
        public G: ECPoint;

        public static get secp256k1(): ECCurve
        {
            return _secp256k1 || (_secp256k1 = new ECCurve(
                BigInteger.fromString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F", 16),
                BigInteger.Zero,
                new BigInteger(7),
                BigInteger.fromString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141", 16),
                ("04" + "79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798" + "483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8").hexToBytes()
            ));
        }

        public static get secp256r1(): ECCurve
        {
            return _secp256r1 || (_secp256r1 = new ECCurve(
                BigInteger.fromString("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF", 16),
                BigInteger.fromString("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC", 16),
                BigInteger.fromString("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B", 16),
                BigInteger.fromString("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551", 16),
                ("04" + "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296" + "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5").hexToBytes()
            ));
        }

        constructor(Q: BigInteger, A: BigInteger, B: BigInteger, N: BigInteger, G: Uint8Array)
        {
            this.Q = Q;
            this.A = new ECFieldElement(A, this);
            this.B = new ECFieldElement(B, this);
            this.N = N;
            this.Infinity = new ECPoint(null, null, this);
            this.G = ECPoint.decodePoint(G, this);
        }
    }
}