import { describe, expect, it } from "vitest";
import { parseMbox, searchMailbox } from "../../src/core/mbox";

describe("mbox import and threading", () => {
  it("splits mboxrd messages, unescapes body From lines, and threads replies", () => {
    const source = `From sender@example.test Tue Sep  1 10:00:00 2026
From: Sender <sender@example.test>
Date: Tue, 01 Sep 2026 10:00:00 +0000
Message-ID: <root@example.test>
Subject: Root

First body
>From escaped body line
From reply@example.test Tue Sep  1 10:01:00 2026
From: Reply <reply@example.test>
Date: Tue, 01 Sep 2026 10:01:00 +0000
Message-ID: <reply@example.test>
In-Reply-To: <root@example.test>
References: <root@example.test>
Subject: Re: Root

Reply body
`;
    const mailbox = parseMbox(new TextEncoder().encode(source));
    expect(mailbox.entries).toHaveLength(2);
    expect(mailbox.entries[0]?.message.bodySource).toContain(
      "From escaped body line",
    );
    expect(mailbox.entries[1]).toMatchObject({
      parentIndex: 0,
      depth: 1,
      subject: "Re: Root",
    });
    expect(
      searchMailbox(mailbox, "escaped body").map((entry) => entry.index),
    ).toEqual([0]);
    expect(
      searchMailbox(mailbox, "reply root", { includeBodies: false }),
    ).toHaveLength(1);
  });

  it("requires an envelope separator", () => {
    expect(() =>
      parseMbox(new TextEncoder().encode("From: a@example.test\n\nbody")),
    ).toThrow(/envelope separator/iu);
  });
});