export const JournalEntry = entity("journal_entry", {
  description: "Balanced journal lines. A posted entry is never edited; it is reversed.",
  properties: {
    memo: p.text(),
    source: p.select(ENTRY_SOURCE),
    status: p.select(ENTRY_STATUS, { default: "draft", managed: true }),
  },
  relationships: {
    period: rel.one("period", { inverse: "entries" }),
    preparedBy: rel.one(User, { inverse: "preparedEntries" }),
  },
}).actions((self) => ({
  post: action({
    description: "Post a balanced entry into an open period.",
    input: Schema.Struct({ entry: self.ref }),
    handler: ({ input, principal }) =>
      Effect.gen(function* () {
        const entry = yield* self.get(input.entry, { forUpdate: true });
        const lines = yield* JournalLine.find({ where: { entry: { id: { eq: entry.id } } } });
        const debits = total(lines, "debitMinor");
        if (debits !== total(lines, "creditMinor"))
          return yield* reject("Debits and credits must balance.");
        const period = yield* Period.get(entry.periodId);
        if (period.status === "closed")
          return yield* reject("The period is closed. Post the correction to an open one.");
        if (entry.source === "manual" && debits > 250_000 && entry.preparedById === principal.id)
          return yield* reject("Over £2,500, someone other than the preparer posts it.");
        yield* self.update(entry, { status: "posted" });
      }),
  }),
}));