import { describe, expect, test } from "bun:test";
import { addPendingRename, cancelPendingRename, completeRename } from "../server/utils/renames";
import { provisionalTopicTitle } from "../utils/topic-title";

describe("rename attempt ownership", () => {
    test("an old completion cannot remove a newer attempt", () => {
        addPendingRename("topic", "old");
        const current = addPendingRename("topic", "new");
        completeRename("topic", "old");
        cancelPendingRename("topic", "new");
        expect(current.signal.aborted).toBe(true);
    });

    test("an old cancellation cannot abort a newer attempt", () => {
        const current = addPendingRename("topic", "new");
        cancelPendingRename("topic", "old");
        expect(current.signal.aborted).toBe(false);
        completeRename("topic", "new");
    });

    test("cancellation is safe after completion or restart", () => {
        cancelPendingRename("missing", "old");
        const current = addPendingRename("topic", "new");
        completeRename("topic", "new");
        cancelPendingRename("topic", "new");
        expect(current.signal.aborted).toBe(false);
    });
});

describe("provisional titles", () => {
    test("uses the first meaningful line and normalizes whitespace", () => {
        expect(provisionalTopicTitle({ content: "\n  Help   me debug this\nMore details" })).toBe("Help me debug this");
    });
    test("names attachment-only conversations", () => {
        expect(provisionalTopicTitle({ content: "", files: [{ name: "photo.jpg" }] })).toBe("photo.jpg");
        expect(provisionalTopicTitle({ content: "", fileIds: ["image"] })).toBe("Attached files");
    });
    test("bounds title length and handles empty input", () => {
        expect(provisionalTopicTitle({ content: "a".repeat(200) })).toHaveLength(100);
        expect(provisionalTopicTitle()).toBe("New Topic");
    });
});