import assert from 'node:assert/strict';
import { afterEach, test } from 'node:test';
import { ApiError, updateSlab, type Slab } from './slabs';

const SLAB_ID = 'slab-rev-1';

function baseSlab(server_rev: number): Slab {
  return {
    id: SLAB_ID,
    sku: 'SLAB-01',
    status: 'calibrated',
    price: 100,
    price_source: 'recommendation',
    length_in: 48,
    thickness_in: 2,
    sqft: 2.4,
    bdft: 4.8,
    width_min_in: 6,
    width_max_in: 9,
    width_avg_in: 8,
    species_id: 1,
    wood_category_ids: [2],
    edge_type_term_id: 3,
    figure_term_ids: [],
    grade_term_id: 4,
    thickness_term_id: 5,
    moisture_term_id: 6,
    fig_tag_ids: [],
    feat_tag_ids: [],
    title: 'Maple Slab',
    short_description: 'short',
    description: null,
    content_source: 'manual',
    species_confidence: null,
    figure_confidence: null,
    grade_confidence: null,
    inference_status: null,
    calibration_photo_id: null,
    woo_product_id: null,
    client_rev: 1,
    server_rev,
    created_at: 't',
    updated_at: 't',
  };
}

type Call = { method: string; url: string; body: unknown };
const calls: Call[] = [];
let handler: (method: string, url: string, body: unknown) => { status: number; body: unknown };

const origFetch = globalThis.fetch;

afterEach(() => {
  globalThis.fetch = origFetch;
  calls.length = 0;
});

function mockFetch() {
  globalThis.fetch = (async (input: RequestInfo | URL, init?: RequestInit) => {
    const url = String(input);
    const method = (init?.method ?? 'GET').toUpperCase();
    const body = init?.body ? JSON.parse(String(init.body)) : null;
    calls.push({ method, url, body });
    const { status, body: resp } = handler(method, url, body);
    return new Response(JSON.stringify(resp), {
      status,
      headers: { 'Content-Type': 'application/json' },
    });
  }) as typeof fetch;
}

test('updateSlab succeeds on first PUT when client_rev matches', async () => {
  mockFetch();
  handler = (method, _url, body) => {
    assert.equal(method, 'PUT');
    const patch = body as { client_rev: number };
    assert.equal(patch.client_rev, 3);
    return { status: 200, body: baseSlab(4) };
  };
  const out = await updateSlab(SLAB_ID, { client_rev: 3, title: 'Maple Slab' });
  assert.equal(out.server_rev, 4);
  assert.equal(calls.length, 1);
});

test('updateSlab on 409 refetches, adopts server_rev, retries once', async () => {
  mockFetch();
  let puts = 0;
  handler = (method, url, body) => {
    if (method === 'PUT') {
      puts += 1;
      const patch = body as { client_rev: number; title?: string };
      if (puts === 1) {
        assert.equal(patch.client_rev, 9); // stale (e.g. review POST bumped)
        return {
          status: 409,
          body: {
            error: {
              code: 'revision_conflict',
              message: 'client_rev mismatch',
              detail: { current_server_rev: 10 },
            },
          },
        };
      }
      assert.equal(patch.client_rev, 10); // adopted from GET
      assert.equal(patch.title, 'Maple Slab');
      return { status: 200, body: baseSlab(11) };
    }
    if (method === 'GET' && url.includes(SLAB_ID)) {
      return { status: 200, body: baseSlab(10) };
    }
    throw new Error(`unexpected ${method} ${url}`);
  };
  const out = await updateSlab(SLAB_ID, { client_rev: 9, title: 'Maple Slab' });
  assert.equal(out.server_rev, 11);
  assert.equal(puts, 2);
  assert.equal(calls.map((c) => c.method).join(','), 'PUT,GET,PUT');
});

test('updateSlab second 409 surfaces a reload message', async () => {
  mockFetch();
  handler = (method) => {
    if (method === 'PUT') {
      return {
        status: 409,
        body: {
          error: {
            code: 'revision_conflict',
            message: 'client_rev mismatch',
            detail: { current_server_rev: 99 },
          },
        },
      };
    }
    return { status: 200, body: baseSlab(99) };
  };
  await assert.rejects(
    () => updateSlab(SLAB_ID, { client_rev: 1, sku: 'X' }),
    (e: unknown) => {
      assert.ok(e instanceof ApiError);
      assert.equal(e.status, 409);
      assert.match(e.message, /Reload the page/i);
      return true;
    },
  );
});