import { describe, expect, it } from "vitest";
import { createMockDb } from "../../../testing/index";
import type { Transaction } from "../generated/kysely-tailordb";
import { InvalidStateTransitionError, ProductNotFoundError } from "../lib/errors.generated";
import { baseActiveProduct, baseDraftProduct } from "../testing/fixtures";
import { run } from "./activateProduct";

describe("activateProduct", () => {
  it("returns error when product not found", async () => {
    const { db, spies } = createMockDb<Transaction>();
    spies.select.mockReturnValueOnce(undefined);
    const result = await run(db, { id: "nonexistent" });
    expect(result.ok).toBe(false);
    if (!result.ok) {
      expect(result.error).toBeInstanceOf(ProductNotFoundError);
    }
  });

  it("returns error when not in DRAFT status", async () => {
    const { db, spies } = createMockDb<Transaction>();
    spies.select.mockReturnValueOnce({ ...baseActiveProduct });
    const result = await run(db, { id: "product-2" });
    expect(result.ok).toBe(false);
    if (!result.ok) {
      expect(result.error).toBeInstanceOf(InvalidStateTransitionError);
    }
  });

  it("activates DRAFT product to ACTIVE", async () => {
    const { db, spies } = createMockDb<Transaction>();
    const activated = { ...baseDraftProduct, status: "ACTIVE" };
    spies.select.mockReturnValueOnce({ ...baseDraftProduct });
    spies.update.mockReturnValueOnce(activated);
    const result = await run(db, { id: "product-1" });
    expect(result.ok).toBe(true);
    if (result.ok) {
      expect(result.value.product.status).toBe("ACTIVE");
    }
  });
});
