/**
 * Lighter liquidation price estimation.
 *
 * Lighter publishes a flat per-market `maintenance_margin_fraction` on its
 * order books, surfaced on the generic {@link PerpsMarket} as
 * `maintenanceMarginRate`. The estimate is the standard isolated-margin
 * model parameterised by that rate.
 */

import {
  estimateIsolatedLiquidationPrice,
  type LiquidationEstimateParams,
} from '@lifi/perps-sdk'
import type { PerpsMarket } from '@lifi/perps-types'

/**
 * Estimate the liquidation price of a new isolated position on a Lighter
 * market.
 *
 * @returns The estimated liquidation price, or `undefined` when
 *   `market.maintenanceMarginRate` is absent (the model cannot be evaluated
 *   without the venue's maintenance margin rate) or the inputs are
 *   degenerate.
 * @public
 */
export function estimateLiquidationPrice(
  market: PerpsMarket,
  params: LiquidationEstimateParams
): number | undefined {
  if (market.maintenanceMarginRate === undefined) {
    return undefined
  }
  return estimateIsolatedLiquidationPrice({
    entryPrice: params.entryPrice,
    leverage: params.leverage,
    isLong: params.isLong,
    maintenanceMarginRate: market.maintenanceMarginRate,
  })
}