import type { GridColDef } from "@mui/x-data-grid";
import { describe, expect, it } from "vitest";
import { withEditablePayDate } from "@/dashboard/approved-columns";
import type { MockInvoice } from "@/mocks";
import { formatRelativeFromIsoDate, formatSlashDate } from "@/dashboard/invoice-date-format";

describe("invoice column date helpers (AP-47)", () => {
  it("formats ISO dates as MM/DD/YYYY", () => {
    expect(formatSlashDate("2026-04-10")).toBe("04/10/2026");
  });

  it("formats relative ages from a fixed now", () => {
    const now = new Date("2026-08-11T12:00:00");
    expect(formatRelativeFromIsoDate("2026-08-11", now)).toBe("today");
    expect(formatRelativeFromIsoDate("2026-08-10", now)).toBe("1 day ago");
    expect(formatRelativeFromIsoDate("2026-02-11", now)).toBe("6 months ago");
  });

  it("uses calendar days so early hours still treat yesterday as 1 day ago", () => {
    const earlyMorning = new Date("2026-08-11T01:15:00");
    expect(formatRelativeFromIsoDate("2026-08-10", earlyMorning)).toBe("1 day ago");
    expect(formatRelativeFromIsoDate("2026-08-11", earlyMorning)).toBe("today");
  });

  it("formats future invoice and due dates instead of clamping to today", () => {
    const now = new Date("2026-08-11T12:00:00");
    expect(formatRelativeFromIsoDate("2026-08-12", now)).toBe("in 1 day");
    expect(formatRelativeFromIsoDate("2026-08-16", now)).toBe("in 5 days");
    expect(formatRelativeFromIsoDate("2026-10-11", now)).toBe("in 2 months");
  });
});

describe("withEditablePayDate", () => {
  const hidden: GridColDef<MockInvoice> = { field: "vendorName", headerName: "Vendor" };
  const payDate: GridColDef<MockInvoice> = { field: "payDate", headerName: "Payment Date" };

  it("appends an editable pay date when the catalog hides Payment Date", () => {
    const columns = withEditablePayDate([hidden], payDate);
    expect(columns.filter((column) => column.field === "payDate")).toEqual([
      { field: "payDate", headerName: "Payment Date", editable: true },
    ]);
  });

  it("keeps a single editable pay date when Payment Date is already visible", () => {
    const columns = withEditablePayDate([hidden, { ...payDate, editable: false }], payDate);
    const matches = columns.filter((column) => column.field === "payDate");
    expect(matches).toHaveLength(1);
    expect(matches[0]?.editable).toBe(true);
  });
});