import type { TFunction } from "next-i18next";

import { guessEventLocationType } from "@calcom/app-store/locations";

export type EventNameObjectType = {
  attendeeName: string;
  eventType: string;
  eventName?: string | null;
  host: string;
  location?: string;
  t: TFunction;
};

export function getEventName(eventNameObj: EventNameObjectType, forAttendeeView = false) {
  if (!eventNameObj.eventName)
    return eventNameObj.t("event_between_users", {
      eventName: eventNameObj.eventType,
      host: eventNameObj.host,
      attendeeName: eventNameObj.attendeeName,
    });

  let eventName = eventNameObj.eventName;
  let locationString = eventNameObj.location || "";

  if (eventNameObj.eventName.includes("{Location}") || eventNameObj.eventName.includes("{LOCATION}")) {
    const eventLocationType = guessEventLocationType(eventNameObj.location);
    if (eventLocationType) {
      locationString = eventLocationType.label;
    }
    eventName = eventName.replace("{Location}", locationString);
    eventName = eventName.replace("{LOCATION}", locationString);
  }

  return (
    eventName
      // Need this for compatibility with older event names
      .replace("{Event type title}", eventNameObj.eventType)
      .replace("{Scheduler}", eventNameObj.attendeeName)
      .replace("{Organiser}", eventNameObj.host)
      .replace("{USER}", eventNameObj.attendeeName)
      .replace("{ATTENDEE}", eventNameObj.attendeeName)
      .replace("{HOST}", eventNameObj.host)
      .replace("{HOST/ATTENDEE}", forAttendeeView ? eventNameObj.host : eventNameObj.attendeeName)
  );
}

export const validateCustomEventName = (value: string, message: string) => {
  const validVariables = ["{Event type title}", "{Organiser}", "{Scheduler}", "{Location}"];
  const matches = value.match(/\{([^}]+)\}/g);
  if (matches?.length) {
    for (const item of matches) {
      if (!validVariables.includes(item)) {
        return message;
      }
    }
  }

  return true;
};