Positions

export type PerpPosition = {
  baseAssetAmount: BN;              // Position size (+ long, - short)
  lastCumulativeFundingRate: BN;    // Last settled funding rate
  marketIndex: number;              // Market identifier
  quoteAssetAmount: BN;             // Quote locked in position
  quoteEntryAmount: BN;             // Entry cost basis
  quoteBreakEvenAmount: BN;         // Break-even including fees/funding
  openOrders: number;               // Count of open orders
  openBids: BN;                     // Base amount in open bids
  openAsks: BN;                     // Base amount in open asks
  settledPnl: BN;                   // Realized PnL
  lpShares: BN;                     // LP shares (if providing liquidity)
  remainderBaseAssetAmount: number; // Remainder from precision
  maxMarginRatio: number;           // Custom margin ratio
  lastQuoteAssetAmountPerLp: BN;    // Last LP accounting
  perLpBase: number;                // LP base per share
  positionFlag: number;             // Position flags (isolated, etc.)
  isolatedPositionScaledBalance: BN; // Isolated margin balance
};

export class PositionDirection {
  static readonly LONG = { long: {} };   // baseAssetAmount > 0
  static readonly SHORT = { short: {} }; // baseAssetAmount < 0
}

export class PositionFlag {
  static readonly IsolatedPosition = 1;
  static readonly BeingLiquidated = 2;
  static readonly Bankruptcy = 4;
}

export type SpotPosition = {
  marketIndex: number;
  balanceType: SpotBalanceType;     // DEPOSIT or BORROW
  scaledBalance: BN;                // Balance in scaled units
  openOrders: number;               // Count of open orders
  openBids: BN;                     // Quote reserved in bids
  openAsks: BN;                     // Base reserved in asks
  cumulativeDeposits: BN;           // Total deposits (for tracking)
};

export function calculatePositionPNL(
  market: PerpMarketAccount,
  perpPosition: PerpPosition,
  withFunding = false,
  oraclePriceData: Pick<OraclePriceData, 'price'>
): BN

export function calculateBaseAssetValue(
  market: PerpMarketAccount,
  userPosition: PerpPosition,
  mmOraclePriceData: MMOraclePriceData,
  useSpread = true,
  skipUpdate = false,
  latestSlot?: BN
): BN

export function calculateBaseAssetValueWithOracle(
  market: PerpMarketAccount,
  perpPosition: PerpPosition,
  oraclePriceData: Pick<OraclePriceData, 'price'>,
  includeOpenOrders = false
): BN

export function calculateWorstCaseBaseAssetAmount(
  perpPosition: PerpPosition,
  perpMarket: PerpMarketAccount,
  oraclePrice: BN
): BN