import { beforeEach, describe, expect, it, vi } from 'vitest';

const listKitchenChangesMock = vi.fn();
const listStockEventsMock = vi.fn();
const getStockEntryMock = vi.fn();
const fetchLocationsMock = vi.fn();

vi.mock('../../../src/api/stock.js', () => ({
  listKitchenChanges: (...args) => listKitchenChangesMock(...args),
  listStockEvents: (...args) => listStockEventsMock(...args),
  getStockEntry: (...args) => getStockEntryMock(...args),
}));

vi.mock('../../../src/api/locations.js', () => ({
  fetchLocations: (...args) => fetchLocationsMock(...args),
}));

const { dashboardPageData, renderDashboardPage } = await import('../../../src/features/dashboard/dashboard-page.js');

describe('features/dashboard/dashboard-page', () => {
  beforeEach(() => {
    listKitchenChangesMock.mockReset();
    listStockEventsMock.mockReset();
    getStockEntryMock.mockReset();
    fetchLocationsMock.mockReset();
  });

  it('renders dashboard with recent changes section', () => {
    const html = renderDashboardPage();
    expect(html).toContain('Recent changes');
    expect(html).toContain('x-data="dashboardPage()"');
    expect(html).toContain('Latest item and stock updates, including used and inactive stock.');
    expect(html).toContain('recent-change-list');
  });

  it('loads recent changes on init and renders item-focused details', async () => {
    listKitchenChangesMock.mockResolvedValueOnce({
      since: null,
      nextCursor: null,
      changes: [{
        type: 'item',
        action: 'upsert',
        timestamp: '2026-04-10T10:00:00Z',
        item: {
          uuid_b64: 'u1',
          name: 'Rice',
          stock_type: 'measured',
          quantity: 3,
          uom_symbol: 'kg',
          level: 'good',
          expire_date: '2026-04-21',
          location_initial_uuid_b64: 'loc1',
        },
      }],
    });
    fetchLocationsMock.mockResolvedValueOnce({
      flat: [{ uuid_b64: 'loc1', pathLabel: 'Pantry / Shelf A' }],
    });

    const store = {
      isConnected: true,
      setActiveKitchen: vi.fn(),
      addAlert: vi.fn(),
    };
    const data = dashboardPageData(store);

    await data.init();

    expect(listKitchenChangesMock).toHaveBeenCalledWith(store, { limit: 200 });
    expect(data.recentChanges).toHaveLength(1);
    expect(data.changesState.error).toBe('');
    expect(data.changeHeadline(data.recentChanges[0])).toBe('Rice');
    expect(data.changeKindLabel(data.recentChanges[0])).toBe('Updated');
    expect(data.changeSubtitle(data.recentChanges[0])).toBe('Item details were updated.');
    expect(data.changeDetails(data.recentChanges[0])).toEqual(expect.arrayContaining([
      { label: 'Quantity', value: '3 kg' },
      { label: 'Location', value: 'Pantry / Shelf A' },
    ]));
    expect(getStockEntryMock).not.toHaveBeenCalled();
  });

  it('resolves stock event item context and renders stock transitions', async () => {
    listKitchenChangesMock.mockResolvedValueOnce({
      since: null,
      nextCursor: null,
      changes: [{
        type: 'stock',
        action: 'upsert',
        timestamp: '2026-04-10T10:00:00Z',
        stock: {
          id: 11,
          item_uuid_b64: 'item-uuid-1',
          quantity: 0.5,
          uom_symbol: 'kg',
          level: 'some',
          location_uuid_b64: 'loc2',
        },
      }],
    });
    listStockEventsMock.mockResolvedValueOnce([
      { id: 11, quantity: 0.5, uom_symbol: 'kg', level: 'some' },
      { id: 10, quantity: 1, uom_symbol: 'kg', level: 'good' },
    ]);
    getStockEntryMock.mockResolvedValueOnce({
      uuid_b64: 'item-uuid-1',
      name: 'Flour',
      stock_type: 'measured',
      expire_date: '2026-05-02',
    });
    fetchLocationsMock.mockResolvedValueOnce({
      flat: [{ uuid_b64: 'loc2', pathLabel: 'Pantry / Bin 2' }],
    });

    const data = dashboardPageData({
      isConnected: true,
      setActiveKitchen: vi.fn(),
      addAlert: vi.fn(),
    });

    await data.refreshChanges();

    expect(data.changeHeadline(data.recentChanges[0])).toBe('Flour');
    expect(data.changeKindLabel(data.recentChanges[0])).toBe('Stock changed');
    expect(data.changeStockTransition(data.recentChanges[0])).toEqual({
      previous: '1 kg · Good',
      current: '0.5 kg · Some',
    });
    expect(data.changeDetails(data.recentChanges[0])).toEqual(expect.arrayContaining([
      { label: 'Level', value: 'Some' },
      { label: 'Location', value: 'Pantry / Bin 2' },
    ]));
    expect(getStockEntryMock).toHaveBeenCalledWith(expect.anything(), 'item-uuid-1');
    expect(listStockEventsMock).toHaveBeenCalledWith(expect.anything(), 'item-uuid-1', {
      allowInactive: true,
      limit: 50,
      orderBy: 'id',
      orderDir: 'desc',
    });
  });

  it('retries stock event item lookup with allowInactive after 404', async () => {
    listKitchenChangesMock.mockResolvedValueOnce({
      since: null,
      nextCursor: null,
      changes: [{
        type: 'stock',
        action: 'upsert',
        timestamp: '2026-04-10T10:00:00Z',
        stock: {
          id: 12,
          item_uuid_b64: 'item-uuid-2',
          quantity: 1,
          uom_symbol: 'pcs',
        },
      }],
    });
    listStockEventsMock.mockResolvedValueOnce([
      { id: 12, quantity: 1, uom_symbol: 'pcs' },
    ]);
    getStockEntryMock
      .mockRejectedValueOnce(Object.assign(new Error('Not found'), { status: 404 }))
      .mockResolvedValueOnce({
        uuid_b64: 'item-uuid-2',
        name: 'Archived pasta',
        stock_type: 'measured',
      });
    fetchLocationsMock.mockResolvedValueOnce({ flat: [] });

    const store = {
      isConnected: true,
      setActiveKitchen: vi.fn(),
      addAlert: vi.fn(),
    };
    const data = dashboardPageData(store);

    await data.refreshChanges();

    expect(getStockEntryMock).toHaveBeenNthCalledWith(1, store, 'item-uuid-2');
    expect(getStockEntryMock).toHaveBeenNthCalledWith(
      2,
      store,
      'item-uuid-2',
      { allowInactive: true },
    );
    expect(data.changeHeadline(data.recentChanges[0])).toBe('Archived pasta');
    expect(data.changeKindLabel(data.recentChanges[0])).toBe('New item');
    expect(data.changeStockTransition(data.recentChanges[0])).toEqual({
      previous: 'Initial stock',
      current: '1 pcs',
    });
  });

  it('keeps empty state when API returns no changes', async () => {
    listKitchenChangesMock.mockResolvedValueOnce({
      since: null,
      nextCursor: null,
      changes: [],
    });
    fetchLocationsMock.mockResolvedValueOnce({ flat: [] });

    const data = dashboardPageData({
      isConnected: true,
      setActiveKitchen: vi.fn(),
      addAlert: vi.fn(),
    });

    await data.refreshChanges();

    expect(data.recentChanges).toEqual([]);
    expect(data.changesState.error).toBe('');
  });

  it('captures refresh errors in async state', async () => {
    listKitchenChangesMock.mockRejectedValueOnce(new Error('Feed unavailable'));
    const data = dashboardPageData({
      isConnected: true,
      setActiveKitchen: vi.fn(),
      addAlert: vi.fn(),
    });

    await data.refreshChanges();

    expect(data.changesState.error).toBe('Feed unavailable');
    expect(data.recentChanges).toEqual([]);
  });
});