import { format } from "date-fns";
import { useQuery } from "react-query";

type JournalQueryDate = JournalEntry[];

interface JournalEntry {
  "journal-day": number;
  "original-name": string;
}

export function useJournals(dateStart: Date, dateEnd: Date) {
  const fmtStart = journalFmt(dateStart);
  const fmtEnd = journalFmt(dateEnd);

  return useQuery(["journals", dateStart, dateEnd], async () => {
    const journals: JournalQueryDate[] = await logseq.DB.datascriptQuery(`
      [:find (pull ?p [*])
      :where
      [?b :block/page ?p]
      [?p :block/journal? true]
      [?p :block/journal-day ?d]
      [(>= ?d ${fmtStart})] [(<= ?d ${fmtEnd})]]
    `);

    return new Map(
      journals
        .flatMap((dates) => dates)
        .map((entry) => [entry["journal-day"].toString(), entry])
    );
  });
}

export function journalFmt(date: Date) {
  return format(date, "YMMdd");
}