import { afterEach, beforeEach, expect, it, vi } from "vitest";
import { NextRequest } from "next/server";

const mocks = vi.hoisted(() => ({
  constructEvent: vi.fn(),
  getOrder: vi.fn(),
  setStatusIfCurrent: vi.fn(),
}));

vi.mock("@/lib/stripe", () => ({
  getStripe: () => ({ webhooks: { constructEvent: mocks.constructEvent } }),
}));
vi.mock("@/lib/orders-store", () => ({
  getOrder: mocks.getOrder,
  setStatusIfCurrent: mocks.setStatusIfCurrent,
}));

import { POST } from "@/app/api/webhooks/stripe/route";

const savedWebhookSecret = process.env.STRIPE_WEBHOOK_SECRET;
const owner = { tenant_id: "tenant-test", buyer_subject: "buyer-test" };

beforeEach(() => {
  process.env.STRIPE_WEBHOOK_SECRET = "whsec_fake_local_regression";
  mocks.constructEvent.mockReset();
  mocks.getOrder.mockReset();
  mocks.setStatusIfCurrent.mockReset();
  mocks.setStatusIfCurrent.mockResolvedValue({ order_id: "order-1" });
});

afterEach(() => {
  if (savedWebhookSecret === undefined) delete process.env.STRIPE_WEBHOOK_SECRET;
  else process.env.STRIPE_WEBHOOK_SECRET = savedWebhookSecret;
});

function delivery() {
  return new NextRequest("https://0pt.app/api/webhooks/stripe", {
    method: "POST",
    headers: { "stripe-signature": "signed-in-test" },
    body: "{}",
  });
}

function session(kind: "deposit" | "balance", paymentStatus: string, amount: number) {
  mocks.constructEvent.mockReturnValue({
    type: "checkout.session.completed",
    data: { object: {
      metadata: { order_id: "order-1", kind },
      payment_status: paymentStatus,
      amount_total: amount,
      currency: "sek",
    } },
  });
}

it("advances a matching paid deposit only after a verified event", async () => {
  session("deposit", "paid", 5000);
  mocks.getOrder.mockResolvedValue({ order_id: "order-1", ...owner, status: "draft", deposit_ore: 5000, balance_ore: 5000 });

  expect((await POST(delivery())).status).toBe(200);
  expect(mocks.setStatusIfCurrent).toHaveBeenCalledWith("order-1", "draft", "in_production");
});

it("never advances an unpaid or amount-mismatched deposit", async () => {
  mocks.getOrder.mockResolvedValue({ order_id: "order-1", ...owner, status: "draft", deposit_ore: 5000, balance_ore: 5000 });
  session("deposit", "unpaid", 5000);
  expect((await POST(delivery())).status).toBe(503);
  session("deposit", "paid", 4999);
  expect((await POST(delivery())).status).toBe(422);
  expect(mocks.setStatusIfCurrent).not.toHaveBeenCalled();
});

it("marks a matching paid balance delivered only after acceptance", async () => {
  session("balance", "paid", 5000);
  mocks.getOrder.mockResolvedValue({ order_id: "order-1", ...owner, status: "accepted", deposit_ore: 5000, balance_ore: 5000 });

  expect((await POST(delivery())).status).toBe(200);
  expect(mocks.setStatusIfCurrent).toHaveBeenCalledWith("order-1", "accepted", "delivered");
});

it("does not acknowledge a paid event for a legacy anonymous draft", async () => {
  session("deposit", "paid", 5000);
  mocks.getOrder.mockResolvedValue({ order_id: "order-1", status: "draft", deposit_ore: 5000 });
  expect((await POST(delivery())).status).toBe(503);
  expect(mocks.setStatusIfCurrent).not.toHaveBeenCalled();
});