import { describe, it, expect } from "vitest";
import { actionLabel } from "@/lib/po-activity";
import { formatCurrency } from "@/lib/utils";

describe("actionLabel (Activity timeline)", () => {
  it("interpolates the instalment amount for a partial payment (issue #140)", () => {
    const label = actionLabel(
      { actionType: "PARTIAL_PAYMENT_CONFIRMED", metadata: { paymentAmount: 5000 } },
      "INR"
    );
    expect(label).toBe(`Partial payment of ${formatCurrency(5000, "INR")} confirmed`);
    expect(label).toContain("5,000");
  });

  it("respects the PO currency", () => {
    const label = actionLabel(
      { actionType: "PARTIAL_PAYMENT_CONFIRMED", metadata: { paymentAmount: 1200 } },
      "USD"
    );
    expect(label).toBe(`Partial payment of ${formatCurrency(1200, "USD")} confirmed`);
  });

  it("falls back to the plain label when paymentAmount is missing (older audit rows)", () => {
    expect(
      actionLabel({ actionType: "PARTIAL_PAYMENT_CONFIRMED", metadata: null }, "INR")
    ).toBe("Partial payment confirmed");
    expect(
      actionLabel(
        { actionType: "PARTIAL_PAYMENT_CONFIRMED", metadata: { paymentRef: "TXN-1" } },
        "INR"
      )
    ).toBe("Partial payment confirmed");
  });

  it("falls back when paymentAmount is non-numeric, never rendering NaN", () => {
    const label = actionLabel(
      { actionType: "PARTIAL_PAYMENT_CONFIRMED", metadata: { paymentAmount: "5000" } },
      "INR"
    );
    expect(label).toBe("Partial payment confirmed");
    expect(label).not.toContain("NaN");
  });

  it("leaves other action labels unchanged", () => {
    expect(
      actionLabel({ actionType: "PAYMENT_SENT", metadata: { paymentAmount: 5000 } }, "INR")
    ).toBe("Payment confirmed");
    expect(actionLabel({ actionType: "APPROVED", metadata: null }, "INR")).toBe("Approved");
  });

  it("falls back to the raw action type for unknown actions", () => {
    expect(actionLabel({ actionType: "MYSTERY", metadata: null }, "INR")).toBe("MYSTERY");
  });
});