import { getEventRegistrationState, type EventAvailabilityInput } from "./event-ui.ts";
import type { RegistrationHubState } from "./types.ts";

export type RegistrationHubGate =
  | "registration_ended"
  | "capacity_full"
  | "registration_not_started"
  | null;

export type RegistrationHubGateCopy = {
  status: string;
  title: string;
  subtitle: string;
};

export function getRegistrationHubGate(
  event: EventAvailabilityInput,
  now = Date.now(),
): RegistrationHubGate {
  if (event.status !== "published") return "registration_ended";

  const state = getEventRegistrationState(event, now).state;
  if (state === "closed" || state === "unavailable") return "registration_ended";
  if (state === "full") return "capacity_full";
  if (state === "not_started") return "registration_not_started";
  return null;
}

export function getRegistrationHubGateCopy(
  gate: RegistrationHubGate,
): RegistrationHubGateCopy | null {
  if (gate === "registration_ended") {
    return {
      status: "پایان زمان ثبت‌نام",
      title: "پایان مهلت ثبت‌نام",
      subtitle: "",
    };
  }

  if (gate === "capacity_full") {
    return {
      status: "تکمیل ظرفیت",
      title: "ظرفیت رویداد تکمیل شده",
      subtitle: "",
    };
  }

  if (gate === "registration_not_started") {
    return {
      status: "ثبت‌نام هنوز آغاز نشده",
      title: "مهلت ثبت‌نام هنوز آغاز نشده است",
      subtitle: "",
    };
  }

  return null;
}

export function getRegistrationHubDisplayState(
  state: RegistrationHubState,
): RegistrationHubState {
  return state === "legacy_pending" ? "verification_pending" : state;
}

export function normalizeCouponAmounts(raw: {
  discount_amount?: number | null;
  final_price?: number | null;
}) {
  return {
    discount_amount: (raw.discount_amount ?? 0) / 10,
    final_price: (raw.final_price ?? 0) / 10,
  };
}

export function getFinalPriceToman(
  eventPriceInRials: number,
  couponFinalPriceInToman?: number | null,
) {
  return couponFinalPriceInToman ?? Math.floor(eventPriceInRials / 10);
}