package ecc

import (
	"big"
	"fmt"
)

// var Curves = map[string] Curve{
func (C *Curve) GetCurve(name string) *Curve {

	switch name {

	case "secp112r1":
		return C.load_curve_hex("secp112r1",
			"DB7C2ABF62E35E668076BEAD208B",
			"DB7C2ABF62E35E668076BEAD2088",
			"659EF8BA043916EEDE8911702B22",
			"09487239995A5EE76B55F9C2F098",
			"A89CE5AF8724C0A23E0E0FF77500",
			"DB7C2ABF62E35E7628DFAC6561C5",
			"01")
	case "secp112r2":
		return C.load_curve_hex("secp112r2",
			"DB7C2ABF62E35E668076BEAD208B",
			"6127C24C05F38A0AAAF65C0EF02C",
			"51DEF1815DB5ED74FCC34C85D709",
			"4BA30AB5E892B4E1649DD0928643",
			"ADCD46F5882E3747DEF36E956E97",
			"36DF0AAFD8B8D7597CA10520D04B",
			"04")

	case "secp128r1":
		return C.load_curve_hex("secp128r1",
			"FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF",
			"FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC",
			"E87579C11079F43DD824993C2CEE5ED3",
			"161FF7528B899B2D0C28607CA52C5B86",
			"CF5AC8395BAFEB13C02DA292DDED7A83",
			"FFFFFFFE0000000075A30D1B9038A115",
			"01")
	case "secp128r2":
		return C.load_curve_hex("secp128r2",
			"FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF",
			"D6031998D1B3BBFEBF59CC9BBFF9AEE1",
			"5EEEFCA380D02919DC2C6558BB6D8A5D",
			"7B6AA5D85E572983E6FB32A7CDEBC140",
			"27B6916A894D3AEE7106FE805FC34B44",
			"3FFFFFFF7FFFFFFFBE0024720613B5A3",
			"04")

	case "secp160k1":
		return C.load_curve_hex("secp160k1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73",
			"0000000000000000000000000000000000000000",
			"0000000000000000000000000000000000000007",
			"3B4C382CE37AA192A4019E763036F4F5DD4D7EBB",
			"938CF935318FDCED6BC28286531733C3F03C4FEE",
			"0100000000000000000001B8FA16DFAB9ACA16B6B3",
			"01")
	case "secp160r1":
		return C.load_curve_hex("secp160r1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC",
			"1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45",
			"4A96B5688EF573284664698968C38BB913CBFC82",
			"23A628553168947D59DCC912042351377AC5FB32",
			"0100000000000000000001F4C8F927AED3CA752257",
			"01")
	case "secp160r2":
		return C.load_curve_hex("secp160r2",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70",
			"B4E134D3FB59EB8BAB57274904664D5AF50388BA",
			"52DCB034293A117E1F4FF11B30F7199D3144CE6D",
			"FEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E",
			"0100000000000000000000351EE786A818F3A1A16B",
			"01")
	case "secp192k1":
		return C.load_curve_hex("secp192k1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37",
			"000000000000000000000000000000000000000000000000",
			"000000000000000000000000000000000000000000000003",
			"DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D",
			"9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D",
			"FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D",
			"01")
	case "secp192r1":
		return C.load_curve_hex("secp192r1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC",
			"64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1",
			"188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012",
			"07192B95FFC8DA78631011ED6B24CDD573F977A11E794811",
			"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831",
			"01")
	case "secp224k1":
		return C.load_curve_hex("secp224k1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D",
			"00000000000000000000000000000000000000000000000000000000",
			"00000000000000000000000000000000000000000000000000000005",
			"A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C",
			"7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5",
			"010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7",
			"01")
	case "secp224r1":
		return C.load_curve_hex("secp224r1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE",
			"B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4",
			"B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21",
			"BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D",
			"01")
	case "secp256k1":
		return C.load_curve_hex("secp256k1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F",
			"0000000000000000000000000000000000000000000000000000000000000000",
			"0000000000000000000000000000000000000000000000000000000000000007",
			"79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798",
			"483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141",
			"01")
	case "secp256r1":
		return C.load_curve_hex("secp256r1",
			"FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF",
			"FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC",
			"5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B",
			"6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296",
			"4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5",
			"FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551",
			"01")
	case "secp384r1":
		return C.load_curve_hex("secp384r1",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC",
			"B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF",
			"AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7",
			"3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F",
			"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973",
			"01")
	case "secp521r1":
		return C.load_curve_hex("secp521r1",
			"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
			"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC",
			"0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00",
			"00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66",
			"011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650",
			"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409",
			"01")
	}

	print("this hits if no name fits\n")
	return C
}


/* sets Curve parameters to p,a,b,gx,gy,n,h string*/
func (C *Curve) load_curve_hex(name, p, a, b, gx, gy, n, h string) *Curve {

	return C.load_curve(name, p, a, b, gx, gy, n, h, 16)
}

func (C *Curve) load_curve(name, p, a, b, gx, gy, n, h string, base int) *Curve {
	C.name = name

	C.p.SetString(p, base)

	C.a.SetString(a, base)
	C.b.SetString(b, base)

	C.G.SetString(gx, gy, base)

	C.n.SetString(n, base)
	C.h.SetString(h, base)

	return C
}


func (C *Curve) Print() {

	fmt.Printf("%s\n", C.String())

}

func (C *Curve) String() string {
	s := ""

	s = "Curve: " + C.name + "\n"
	s += "p: " + C.p.String() + "\n"
	s += "a: " + C.a.String() + "\n"
	s += "b: " + C.b.String() + "\n"
	s += "n: " + C.n.String() + "\n"
	s += "h: " + C.h.String()
	s += C.G.String()

	return s
}

func (C *Curve) Test() {
	C.GetCurve("secp112r1")
	C.Print()
}

func NewCurve() *Curve {

	C := new(Curve)
	C.G = NewPoint()
	C.p = new(big.Int)
	C.a = new(big.Int)
	C.b = new(big.Int)
	C.n = new(big.Int)
	C.h = new(big.Int)
	return C
}

// func (C *Curve)GetCurve(name string) *Curve{


// 	return Curves[name]
// }

type Curve struct {
	name string
	p    *big.Int //Prime
	a    *big.Int //'a' parameter of the elliptic curve
	b    *big.Int //'b' parameter of the elliptic curve
	G    *Point   //Generator point of the curve, also known as base point.
	n    *big.Int
	h    *big.Int
}