import { describe, expect, it } from "vite-plus/test"; import {  planPinnedMove,  sortPinnedThreadsByOrderKey,  sortThreads,  type ThreadSortInput,} from "./threadSort.ts"; type TestThread = { readonly id: string } & ThreadSortInput; function makeThread(overrides: Partial<TestThread> = {}): TestThread {  return {    id: "thread-1",    createdAt: "2026-03-09T10:00:00.000Z",    updatedAt: "2026-03-09T10:00:00.000Z",    messages: [],    latestUserMessageAt: null,    ...overrides,  };} describe("sortThreads", () => {  it("falls back to updatedAt and createdAt when latestUserMessageAt is invalid and there are no messages", () => {    const sorted = sortThreads(      [        makeThread({          id: "thread-1",          latestUserMessageAt: "not-a-date",          createdAt: "2026-03-09T10:00:00.000Z",          updatedAt: "2026-03-09T10:05:00.000Z",        }),        makeThread({          id: "thread-2",          latestUserMessageAt: "still-not-a-date",          createdAt: "invalid-created-at",          updatedAt: "invalid-updated-at",        }),        makeThread({          id: "thread-3",          latestUserMessageAt: "invalid-latest-user-message-at",          createdAt: "2026-03-09T10:06:00.000Z",          updatedAt: "invalid-updated-at",        }),      ],      "updated_at",    );     expect(sorted.map((thread) => thread.id)).toEqual(["thread-3", "thread-1", "thread-2"]);  });   it("falls back to the latest valid user message when latestUserMessageAt is invalid", () => {    const sorted = sortThreads(      [        makeThread({          id: "thread-1",          latestUserMessageAt: "invalid-latest-user-message-at",          updatedAt: "2026-03-09T10:00:00.000Z",          messages: [            { role: "user", createdAt: "2026-03-09T10:05:00.000Z" },            { role: "assistant", createdAt: "2026-03-09T10:30:00.000Z" },            { role: "user", createdAt: "2026-03-09T10:20:00.000Z" },          ],        }),        makeThread({          id: "thread-2",          createdAt: "2026-03-09T10:15:00.000Z",          updatedAt: "2026-03-09T10:15:00.000Z",        }),      ],      "updated_at",    );     expect(sorted.map((thread) => thread.id)).toEqual(["thread-1", "thread-2"]);  });}); describe("planPinnedMove", () => {  it("moves a thread up with a single key write", () => {    const assignments = planPinnedMove({      orderedIds: ["a", "b", "c"],      keysById: new Map([        ["a", "f"],        ["b", "m"],        ["c", "t"],      ]),      movedId: "c",      direction: "up",    });    expect(assignments).toHaveLength(1);    expect(assignments![0]!.id).toBe("c");    expect(assignments![0]!.orderKey > "f" && assignments![0]!.orderKey < "m").toBe(true);  });   it("returns null when the move falls off the end of the list", () => {    const input = {      orderedIds: ["a", "b"],      keysById: new Map([        ["a", "f"],        ["b", "m"],      ]),    };    expect(planPinnedMove({ ...input, movedId: "a", direction: "up" })).toBeNull();    expect(planPinnedMove({ ...input, movedId: "b", direction: "down" })).toBeNull();  });   it("materializes keys for the whole section when a neighbor is keyless", () => {    const assignments = planPinnedMove({      orderedIds: ["a", "b", "c"],      keysById: new Map([        ["a", null],        ["b", "m"],        ["c", null],      ]),      movedId: "b",      direction: "up",    });    expect(assignments).not.toBeNull();    const keys = assignments!.map((entry) => entry.orderKey);    expect([...keys].sort()).toEqual(keys);  });}); describe("sortPinnedThreadsByOrderKey", () => {  it("breaks equal keys by id THEN environment so merged lists are stable everywhere", () => {    const sorted = sortPinnedThreadsByOrderKey([      {        id: "thread-1",        createdAt: "2026-03-09T10:00:00.000Z",        pinOrderKey: "m",        environmentId: "env-b",      },      {        id: "thread-1",        createdAt: "2026-03-09T11:00:00.000Z",        pinOrderKey: "m",        environmentId: "env-a",      },    ]);    expect(sorted.map((thread) => thread.environmentId)).toEqual(["env-a", "env-b"]);  });});