import { hasPath, pathOr, props, last } from 'ramda';
import { do_request } from './facebook-request.mjs';
const sleep = (s) => new Promise((res) => setTimeout(res, s * 1000));

const doPageEventsTabPastEventsCardRendererQuery = async ({ pageID }) => {
  const doc_id = '4421910857857782';
  const renderer_query_result = await do_request(doc_id, { pageID });
  const page = pathOr(
    null,
    ['data', 'page', 'past_events'],
    renderer_query_result
  );

  if (page === null) {
    console.error('doPageEventsTabPastEventsCardRendererQuery returned null.');
  }

  return page;
};

const doPageEventsTabUpcomingEventsCardRendererQuery = async ({ pageID }) => {
  const doc_id = '5182274978466320';
  const renderer_query_result = await do_request(doc_id, { pageID });
  const page = pathOr(
    null,
    ['data', 'page', 'upcoming_events'],
    renderer_query_result
  );

  if (page === null) {
    console.error(
      'doPageEventsTabUpcomingEventsCardRendererQuery returned null.'
    );
  }

  return page;
};

const doPageEventsTabPastEventsCardPaginationQuery = async ({
  pageID,
  cursor
}) => {
  const doc_id = '6953034388071359';
  let count = 9;
  const renderer_query_result = await do_request(doc_id, {
    pageID,
    cursor,
    count
  });
  const page = pathOr(
    null,
    ['data', 'page', 'past_events'],
    renderer_query_result
  );

  if (page === null) {
    console.error(
      'doPageEventsTabPastEventsCardPaginationQuery returned null.'
    );
  }

  return page;
};

const doPageEventsTabUpcomingEventsCardPaginationQuery = async ({
  pageID,
  cursor
}) => {
  const doc_id = '6985622308176123';
  let count = 9;
  const renderer_query_result = await do_request(doc_id, {
    pageID,
    cursor,
    count
  });
  const page = pathOr(
    null,
    ['data', 'page', 'upcoming_events'],
    renderer_query_result
  );

  if (page === null) {
    console.error(
      'doPageEventsTabUpcomingEventsCardPaginationQuery returned null.'
    );
  }

  return page;
};

// doPageEventsTabPastEventsCardPaginationQuery
const get_page_events = async ({
  pageID,
  get_past_events,
  get_upcoming_events
}) => {
  let past_events = [];

  if (get_past_events) {
    const result = await doPageEventsTabPastEventsCardRendererQuery({ pageID });

    if (result !== null) {
      let { has_next_page, end_cursor: cursor } = result.page_info;

      let { edges } = result;
      while (has_next_page) {
        sleep(2);
        const paginationResult =
          await doPageEventsTabPastEventsCardPaginationQuery({
            cursor,
            pageID
          });
        if (paginationResult === null) {
          break;
        }
        edges = [...edges, ...paginationResult.edges];
        has_next_page = paginationResult.page_info.has_next_page;
        cursor = paginationResult.page_info.end_cursor;
      }
      past_events = [...edges];
    }
  }

  let upcoming_events = [];

  if (get_upcoming_events) {
    const result = await doPageEventsTabUpcomingEventsCardRendererQuery({
      pageID
    });
    if (result !== null) {
      upcoming_events = [];
      let { has_next_page, end_cursor: cursor } = result.page_info;
      let { edges } = result;
      while (has_next_page) {
        sleep(2);
        const paginationResult =
          await doPageEventsTabUpcomingEventsCardPaginationQuery({
            cursor,
            pageID
          });
        if (paginationResult === null) {
          break;
        }
        edges = [...edges, ...paginationResult.edges];

        has_next_page = paginationResult.page_info.has_next_page;
        cursor = paginationResult.page_info.end_cursor;
      }
      upcoming_events = [...edges];
    }
  }

  return [...upcoming_events, ...past_events].map(({ node }) => node);
};

/// const events = {
///   edges: [
///     {
///       node: {
///         __typename: "Event",
///       },
///       cursor:
///         "AQHRC7ZNKEqDS75jWJfLUWromnLVgAOGzVAZE7c7CcKfoEaLCcXFSvhMvoxN8yk_Yq6fFMTWjuHjitD5sE1IzW68sw",
///     },
///   ],
///   page_info: {
///     has_next_page: true,
///     end_cursor:
///       "AQHRAh7tKZowf3mdyxtYISP1LNVo45rFI8HJ4nT5SuVgl0NBUfZFslx5qy1eba3YXhdjJ-S2vfojcTGF4ygnt_DQiQ",
///   },
/// };

(async () => {
  const res = await get_page_events({
    pageID: '149127815110411',
    get_upcoming_events: true
  });
  console.log(res);
})();