import { describe, expect, it } from "vitest";
import {
  canMoveWorkspaceTabHistory,
  createWorkspaceTabHistory,
  currentWorkspaceTabPath,
  moveWorkspaceTabHistory,
  recordWorkspaceTabPath,
  replaceWorkspaceTabPath,
} from "./workspaceTabHistory";

describe("workspace tab history", () => {
  it("records full paths without duplicating the current entry", () => {
    const initial = createWorkspaceTabHistory("/subjects");
    const detail = recordWorkspaceTabPath(initial, "/subjects/subject-1?tab=ae");

    expect(detail).toEqual({ entries: ["/subjects", "/subjects/subject-1?tab=ae"], index: 1 });
    expect(recordWorkspaceTabPath(detail, "/subjects/subject-1?tab=ae")).toBe(detail);
  });

  it("moves backward and forward without adding entries", () => {
    const detail = recordWorkspaceTabPath(createWorkspaceTabHistory("/subjects"), "/subjects/subject-1");
    const backward = moveWorkspaceTabHistory(detail, -1);
    const forward = moveWorkspaceTabHistory(backward?.history, 1);

    expect(backward?.path).toBe("/subjects");
    expect(forward?.path).toBe("/subjects/subject-1");
    expect(canMoveWorkspaceTabHistory(backward?.history, -1)).toBe(false);
    expect(canMoveWorkspaceTabHistory(backward?.history, 1)).toBe(true);
  });

  it("drops forward entries after a new navigation branch", () => {
    const detail = recordWorkspaceTabPath(createWorkspaceTabHistory("/subjects"), "/subjects/subject-1");
    const backward = moveWorkspaceTabHistory(detail, -1);
    const branch = recordWorkspaceTabPath(backward?.history, "/subjects/new");

    expect(branch).toEqual({ entries: ["/subjects", "/subjects/new"], index: 1 });
    expect(canMoveWorkspaceTabHistory(branch, 1)).toBe(false);
  });

  it("replaces canonical redirects without creating a backward loop", () => {
    const canonical = replaceWorkspaceTabPath(
      createWorkspaceTabHistory("/file-versions"),
      "/trial/study-1/documents",
    );

    expect(canonical).toEqual({ entries: ["/trial/study-1/documents"], index: 0 });
    expect(canMoveWorkspaceTabHistory(canonical, -1)).toBe(false);
    expect(currentWorkspaceTabPath(canonical, "/file-versions")).toBe("/trial/study-1/documents");
  });
});