import type { FactionId } from './catalog';

/** Ordinary reserve shipment; other transport powers have separate prices. */
export function reserveShipmentCost(
  player: { faction: FactionId; halfRate: boolean },
  territoryType: string,
  amount: number,
) {
  if (player.faction === 'fremen') return 0;
  const standard = amount * (territoryType === 'stronghold' ? 1 : 2);
  return player.halfRate ? Math.ceil(standard / 2) : standard;
}

/** Guild cross-planet transport and returns; Fremen southern reserves pay this
 * tariff too. Pass 'reserves' for a return, not a board territory type.
 */
export function guildShipmentCost(
  destinationType: string,
  amount: number,
  halfRate = true,
) {
  const normal = amount *
    (destinationType === 'reserves' || destinationType === 'stronghold' ? 1 : 2);
  return halfRate ? Math.ceil(normal / 2) : normal;
}

const ordinaryAlliedNoFieldPricing = Object.freeze({
  stronghold: 1, other: 2, bankOnly: false, policy: null,
});
const discountedAlliedNoFieldPricing = Object.freeze({
  stronghold: 1, other: 1, bankOnly: true,
  policy: 'Provisional pricing: a Guild recipient or already-active Karama rate uses the rounded one-force Guild fee (1 spice), paid entirely to the bank. This price/payee precedence is not an adjudicated publisher ruling.',
});

const canceledGuildAlliedNoFieldPricing = Object.freeze({
  stronghold: 1, other: 2, bankOnly: true,
  policy: 'Provisional pricing: canceling a Guild recipient’s native rate charges the full one-force fee, still paid entirely to the bank. This price/payee precedence is not an adjudicated publisher ruling.',
});

/** Shared first-version price/payee policy for Basic and Advanced. */
export function alliedNoFieldShipmentPricing(
  context: {
    purchasedGuildRate: boolean;
    nativeGuildRateCanceled: boolean;
  },
  recipient: { faction: FactionId },
) {
  if (context.purchasedGuildRate)
    return discountedAlliedNoFieldPricing;
  if (recipient.faction !== 'guild') return ordinaryAlliedNoFieldPricing;
  return context.nativeGuildRateCanceled
    ? canceledGuildAlliedNoFieldPricing : discountedAlliedNoFieldPricing;
}

/** A pledge is already escrowed. Selecting a share never spends a donor's
 * unpledged balance or enlarges the contribution they authorized.
 */
export function shipmentPaymentBounds(
  cost: number,
  ownSpice: number,
  pledgedSpice: number,
) {
  return {
    minimum: Math.max(0, cost - ownSpice),
    maximum: Math.min(cost, pledgedSpice),
  };
}

/** November 2020 FAQ, Alliances: each contributor pays the Guild directly;
 * money contributed by the Guild itself goes to the bank. An independent
 * Karama shipment routes the entire payment to the bank.
 */
export function guildShipmentIncome(payment: {
  guild: string | undefined;
  shipper: string;
  ally: string | null;
  cost: number;
  allyPayment: number;
  bankOnly: boolean;
}) {
  if (!payment.guild || payment.bankOnly) return 0;
  return (
    (payment.shipper === payment.guild
      ? 0
      : payment.cost - payment.allyPayment) +
    (payment.ally === payment.guild ? 0 : payment.allyPayment)
  );
}