import BN from 'bn.js'

import { ONE } from '../../entity'

export const NEGATIVE_ONE = new BN(-1)

export const Q64 = new BN(1).shln(64)
export const Q128 = new BN(1).shln(128)

export const MaxU64 = Q64.sub(ONE)

export const U64Resolution = 64

export const MaxUint128 = Q128.subn(1)

export const MIN_TICK = -443636
export const MAX_TICK = -MIN_TICK

export const MIN_SQRT_PRICE_X64: BN = new BN('4295048016')
export const MAX_SQRT_PRICE_X64: BN = new BN('79226673521066979257578248091')

// export const MIN_TICK_ARRAY_START_INDEX = -307200;
// export const MAX_TICK_ARRAY_START_INDEX = 306600;

export const BIT_PRECISION = 16
export const LOG_B_2_X32 = '59543866431248'
export const LOG_B_P_ERR_MARGIN_LOWER_X64 = '184467440737095516'
export const LOG_B_P_ERR_MARGIN_UPPER_X64 = '15793534762490258745'

export const FEE_RATE_DENOMINATOR = new BN(10).pow(new BN(6))

export enum Fee {
  rate_500 = 500, //  500 / 10e6 = 0.0005
  rate_3000 = 3000, // 3000/ 10e6 = 0.003
  rate_10000 = 10000, // 10000 /10e6 = 0.01
}
export const TICK_SPACINGS: { [amount in Fee]: number } = {
  [Fee.rate_500]: 10,
  [Fee.rate_3000]: 60,
  [Fee.rate_10000]: 200,
}

export const U64_IGNORE_RANGE = new BN('18446744073700000000')