import { describe, expect, it, vi, beforeEach, afterEach } from "vitest";
import { api } from "./api";

const originalFetch = global.fetch;
const mockFetch = vi.fn();

describe("api GET helpers", () => {
  beforeEach(() => {
    global.fetch = mockFetch as unknown as typeof fetch;
    mockFetch.mockReset();
  });
  afterEach(() => {
    global.fetch = originalFetch;
    vi.restoreAllMocks();
  });

  it("listBatches hits /api/batches and unwraps body.items", async () => {
    mockFetch.mockResolvedValueOnce(
      new Response(JSON.stringify({ items: [] }), {
        status: 200,
        headers: { "content-type": "application/json" },
      })
    );
    const out = await api.listBatches();
    expect(out).toEqual([]);
    expect(mockFetch).toHaveBeenCalledTimes(1);
    const called = mockFetch.mock.calls[0][0] as string;
    expect(called).toContain("/api/batches");
    expect(called).not.toContain("?");
  });

  it("listClaims builds the right URL with status + sort + order", async () => {
    mockFetch.mockResolvedValueOnce(
      new Response(
        JSON.stringify({ items: [], total: 0, returned: 0, has_more: false }),
        { status: 200, headers: { "content-type": "application/json" } }
      )
    );
    await api.listClaims({
      status: "submitted",
      sort: "billedAmount",
      order: "desc",
    });
    const called = mockFetch.mock.calls[0][0] as string;
    expect(called).toContain("/api/claims?");
    expect(called).toContain("status=submitted");
    expect(called).toContain("sort=billedAmount");
    expect(called).toContain("order=desc");
  });

  it("getBatch returns the result with the right id in the URL", async () => {
    mockFetch.mockResolvedValueOnce(
      new Response(
        JSON.stringify({
          envelope: {
            sender_id: "X",
            receiver_id: "Y",
            control_number: "1",
            transaction_date: "2026-01-01",
          },
          claims: [],
          summary: {},
          kind: "835",
        }),
        { status: 200, headers: { "content-type": "application/json" } }
      )
    );
    const out = await api.getBatch("abc");
    expect(out).toBeTruthy();
    const called = mockFetch.mock.calls[0][0] as string;
    expect(called).toContain("/api/batches/abc");
  });
});