import { describe, it, expect } from "vitest";
import {
  COMPLETED_WINDOW_DAYS,
  completedWindowCutoff,
  completedTabFilter,
} from "./orders-service";

describe("completedWindowCutoff", () => {
  it("returns an ISO string COMPLETED_WINDOW_DAYS before `now`", () => {
    const now = new Date("2026-08-23T12:00:00.000Z");
    const cutoff = completedWindowCutoff(now);
    const expected = new Date(
      now.getTime() - COMPLETED_WINDOW_DAYS * 24 * 60 * 60 * 1000,
    );
    expect(cutoff).toBe(expected.toISOString());
  });

  it("uses the supplied `now` argument (pure function, no clock dep)", () => {
    const fixed = new Date("2026-01-15T00:00:00.000Z");
    const cutoff = completedWindowCutoff(fixed);
    // 30 days before 2026-01-15 = 2025-12-16
    expect(cutoff).toBe("2025-12-16T00:00:00.000Z");
  });

  it("defaults to wall-clock `new Date()` when called with no args", () => {
    const before = Date.now();
    const cutoff = completedWindowCutoff();
    const cutoffMs = new Date(cutoff).getTime();
    const expectedLatest =
      before - COMPLETED_WINDOW_DAYS * 24 * 60 * 60 * 1000 + 50;
    expect(cutoffMs).toBeLessThanOrEqual(expectedLatest);
  });
});

describe("completedTabFilter", () => {
  it("applies the time-windowed predicate for both terminal statuses", () => {
    const now = new Date("2026-08-23T00:00:00.000Z");
    const cutoff = completedWindowCutoff(now);
    const filter = completedTabFilter(now);

    // delivered items are filtered by delivered_at, not updated, so
    // older rows (delivered before the window) drop out.
    expect(filter).toContain(
      `(item_status = "delivered" && delivered_at >= "${cutoff}")`,
    );
    // completed items have no dedicated timestamp, so we use updated.
    expect(filter).toContain(
      `(item_status = "completed" && updated >= "${cutoff}")`,
    );
    // The two clauses must be OR-joined (PB doesn't have an IN-list
    // for date predicates).
    expect(filter).toContain(") || (");
  });

  it("uses the supplied `now` so the filter is stable for tests", () => {
    const now = new Date("2026-07-01T00:00:00.000Z");
    expect(completedTabFilter(now)).toBe(
      `(item_status = "delivered" && delivered_at >= "${completedWindowCutoff(now)}")` +
        ` || (item_status = "completed" && updated >= "${completedWindowCutoff(now)}")`,
    );
  });
});