/**
 * Tests for the Failure Detection settings component (#172).
 */

import { describe, it, expect, vi, beforeEach } from 'vitest';
import { screen, waitFor, within } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { render } from '../utils';
import { FailureDetectionSettings } from '../../components/FailureDetectionSettings';
import { http, HttpResponse } from 'msw';
import { server } from '../mocks/server';

const baseSettings = {
  auto_archive: true,
  save_thumbnails: true,
  capture_finish_photo: true,
  default_filament_cost: 25,
  currency: 'USD',
  energy_cost_per_kwh: 0.15,
  energy_tracking_mode: 'total',
  check_updates: true,
  check_printer_firmware: true,
  include_beta_updates: false,
  obico_enabled: false,
  obico_ml_url: '',
  bambuddy_internal_url: '',
  obico_ml_token: '',
  obico_sensitivity: 'medium',
  obico_action: 'notify',
  obico_poll_interval: 10,
  obico_enabled_printers: '',
};

const baseStatus = {
  is_running: true,
  last_error: null,
  per_printer: {},
  thresholds: { low: 0.38, high: 0.78 },
  history: [],
  enabled: false,
  ml_url: '',
  sensitivity: 'medium',
  action: 'notify',
  poll_interval: 10,
};

describe('FailureDetectionSettings', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    server.use(
      http.get('/api/v1/settings/', () => HttpResponse.json(baseSettings)),
      http.get('/api/v1/obico/status', () => HttpResponse.json(baseStatus)),
      http.get('/api/v1/printers', () => HttpResponse.json([])),
    );
  });

  it('renders headings and fields', async () => {
    render(<FailureDetectionSettings />);
    await waitFor(() => {
      expect(screen.getByText(/AI Failure Detection|Failure Detection/i)).toBeInTheDocument();
    });
    expect(screen.getByText(/Obico ML API URL/i)).toBeInTheDocument();
    expect(screen.getByText(/Sensitivity/i)).toBeInTheDocument();
    expect(screen.getByPlaceholderText('http://bambuddy:8000')).toBeDisabled();
  });

  it('test button calls the test-connection endpoint and shows success', async () => {
    let called = false;
    server.use(
      http.get('/api/v1/settings/', () =>
        HttpResponse.json({ ...baseSettings, obico_enabled: true, obico_ml_url: 'http://obico:3333' }),
      ),
      http.post('/api/v1/obico/test-connection', async ({ request }) => {
        called = true;
        const body = (await request.json()) as { url: string };
        expect(body.url).toBe('http://obico:3333');
        return HttpResponse.json({ ok: true, status_code: 200, body: 'ok', error: null });
      }),
    );
    render(<FailureDetectionSettings />);
    const testBtn = await screen.findByRole('button', { name: /test/i });
    await userEvent.click(testBtn);
    await waitFor(() => {
      expect(called).toBe(true);
    });
    expect(await screen.findByText(/ML API reachable/i)).toBeInTheDocument();
  });

  it.each([
    ['', 'http://print-server:8000'],
    ['http://print-server:8000', ''],
  ])('auto-saves a Bambuddy Internal URL change from "%s" to "%s"', async (initial, next) => {
    let settings = { ...baseSettings, obico_enabled: true, bambuddy_internal_url: initial };
    let saved: Record<string, unknown> | null = null;
    server.use(
      http.get('/api/v1/settings/', () => HttpResponse.json(settings)),
      http.put('/api/v1/settings/', async ({ request }) => {
        saved = (await request.json()) as Record<string, unknown>;
        settings = { ...settings, ...saved };
        return HttpResponse.json(settings);
      }),
    );
    render(<FailureDetectionSettings />);
    const input = await screen.findByPlaceholderText('http://bambuddy:8000');
    await waitFor(() => {
      expect(input).not.toBeDisabled();
      expect(input).toHaveValue(initial);
    });
    await userEvent.clear(input);
    if (next) await userEvent.type(input, next);
    await waitFor(() => expect(saved?.bambuddy_internal_url).toBe(next), { timeout: 3000 });
  });

  it('flags a Bambuddy Internal URL without a scheme and does not save it', async () => {
    const puts: Record<string, unknown>[] = [];
    server.use(
      http.get('/api/v1/settings/', () =>
        HttpResponse.json({ ...baseSettings, obico_enabled: true, bambuddy_internal_url: '' }),
      ),
      http.put('/api/v1/settings/', async ({ request }) => {
        const body = (await request.json()) as Record<string, unknown>;
        puts.push(body);
        return HttpResponse.json({ ...baseSettings, ...body });
      }),
    );
    render(<FailureDetectionSettings />);
    const input = await screen.findByPlaceholderText('http://bambuddy:8000');
    await waitFor(() => expect(input).not.toBeDisabled());
    await userEvent.type(input, 'bambuddy:8000');
    expect(await screen.findByText(/Must start with http:\/\/ or https:\/\//)).toBeInTheDocument();
    expect(input).toHaveAttribute('aria-invalid', 'true');
    await new Promise((resolve) => setTimeout(resolve, 800));
    expect(puts.filter((body) => 'bambuddy_internal_url' in body)).toEqual([]);
  });

  describe('ML API token (#2733)', () => {
    const enabledWithToken = {
      ...baseSettings,
      obico_enabled: true,
      obico_ml_url: 'http://obico:3333',
      obico_ml_token: 's3cret',
    };

    it('renders the token as a masked field populated from settings', async () => {
      server.use(http.get('/api/v1/settings/', () => HttpResponse.json(enabledWithToken)));
      render(<FailureDetectionSettings />);

      const input = await screen.findByDisplayValue('s3cret');
      expect(input).toHaveAttribute('type', 'password');
      expect(screen.getByText(/ML API Token/i)).toBeInTheDocument();
    });

    it('sends the token with the test-connection request', async () => {
      let sent: { url: string; token?: string } | null = null;
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json(enabledWithToken)),
        http.post('/api/v1/obico/test-connection', async ({ request }) => {
          sent = (await request.json()) as { url: string; token?: string };
          return HttpResponse.json({
            ok: true,
            status_code: 200,
            body: 'ok',
            error: null,
            auth_ok: true,
          });
        }),
      );
      render(<FailureDetectionSettings />);
      await screen.findByDisplayValue('http://obico:3333');
      await userEvent.click(screen.getByRole('button', { name: /test/i }));

      await waitFor(() => expect(sent).not.toBeNull());
      // The value in the box, not the saved one — so a token can be checked
      // before it is committed.
      expect(sent!.token).toBe('s3cret');
    });

    it('reports a rejected token instead of a bare success', async () => {
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json(enabledWithToken)),
        http.post('/api/v1/obico/test-connection', () =>
          HttpResponse.json({
            ok: false,
            status_code: 401,
            body: 'ok',
            error: 'The ML API is reachable but rejected the token.',
            auth_ok: false,
          }),
        ),
      );
      render(<FailureDetectionSettings />);
      await screen.findByDisplayValue('http://obico:3333');
      await userEvent.click(screen.getByRole('button', { name: /test/i }));

      expect(await screen.findByText(/rejected the token/i)).toBeInTheDocument();
    });

    it('does not claim the token works when it could not be checked', async () => {
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json(enabledWithToken)),
        http.post('/api/v1/obico/test-connection', () =>
          HttpResponse.json({ ok: true, status_code: 200, body: 'ok', error: null, auth_ok: null }),
        ),
      );
      render(<FailureDetectionSettings />);
      await screen.findByDisplayValue('http://obico:3333');
      await userEvent.click(screen.getByRole('button', { name: /test/i }));

      expect(await screen.findByText(/token could not be checked/i)).toBeInTheDocument();
    });

    it('auto-saves the token', async () => {
      let saved: Record<string, unknown> | null = null;
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json({ ...enabledWithToken, obico_ml_token: '' })),
        http.put('/api/v1/settings/', async ({ request }) => {
          saved = (await request.json()) as Record<string, unknown>;
          return HttpResponse.json({ ...enabledWithToken, obico_ml_token: 'typed' });
        }),
      );
      render(<FailureDetectionSettings />);
      const input = await screen.findByPlaceholderText(/ML_API_TOKEN/i);
      // Every field stays disabled until the settings query lands.
      await waitFor(() => expect(input).not.toBeDisabled());
      await userEvent.type(input, 'typed');

      await waitFor(() => expect(saved).not.toBeNull(), { timeout: 3000 });
      expect(saved!.obico_ml_token).toBe('typed');
    });
  });

  describe('printers that are gone', () => {
    const limited = { ...baseSettings, obico_enabled: true, obico_enabled_printers: '[1,2]' };
    const printerOne = [{ id: 1, name: 'A', serial_number: 'S1', model: 'X1C', is_active: true }];

    it('sends back printers this user cannot see', async () => {
      // GET /printers lists only the caller's printers; one missing from it may
      // just be hidden. The server drops deleted ones itself.
      let saved: Record<string, unknown> | null = null;
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json(limited)),
        http.get('/api/v1/printers', () => HttpResponse.json(printerOne)),
        http.put('/api/v1/settings/', async ({ request }) => {
          saved = (await request.json()) as Record<string, unknown>;
          return HttpResponse.json({ ...limited, ...saved });
        }),
      );
      render(<FailureDetectionSettings />);
      const input = await screen.findByPlaceholderText(/ML_API_TOKEN/i);
      await waitFor(() => expect(input).not.toBeDisabled());
      await screen.findByText('A');
      await userEvent.type(input, 'typed');

      await waitFor(() => expect(saved).not.toBeNull(), { timeout: 3000 });
      expect(saved!.obico_enabled_printers).toBe('[1,2]');
    });

    it('takes back what the server refused, so the next save goes through', async () => {
      // Printer 5 was deleted elsewhere after this page listed it.
      const stored = { ...limited, obico_enabled_printers: '[1]' };
      let printerCalls = 0;
      let saved: Record<string, unknown> | null = null;
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json(stored)),
        http.get('/api/v1/printers', () =>
          HttpResponse.json(
            printerCalls++ === 0
              ? [...printerOne, { id: 5, name: 'E', serial_number: 'S5', model: 'X1C', is_active: true }]
              : printerOne,
          ),
        ),
        http.put('/api/v1/settings/', async ({ request }) => {
          const body = (await request.json()) as Record<string, unknown>;
          if (body.obico_enabled_printers === '[1,5]') {
            return HttpResponse.json({ detail: 'Unknown printer: 5' }, { status: 400 });
          }
          saved = body;
          return HttpResponse.json({ ...stored, ...body });
        }),
      );
      render(<FailureDetectionSettings />);
      const input = await screen.findByPlaceholderText(/ML_API_TOKEN/i);
      await waitFor(() => expect(input).not.toBeDisabled());
      await userEvent.click(within((await screen.findByText('E')).closest('label')!).getByRole('checkbox'));
      expect(await screen.findByText(/Unknown printer: 5/, {}, { timeout: 3000 })).toBeInTheDocument();
      await waitFor(() => expect(screen.queryByText('E')).not.toBeInTheDocument());

      await userEvent.type(input, 'typed');
      await waitFor(() => expect(saved).not.toBeNull(), { timeout: 3000 });
      expect(saved!.obico_enabled_printers).toBe('[1]');
    });

    it('keeps an address being typed when the server refuses it as unfinished', async () => {
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json({ ...baseSettings, obico_enabled: true })),
        http.put('/api/v1/settings/', () =>
          HttpResponse.json({ detail: [{ msg: 'URL must include a hostname' }] }, { status: 422 }),
        ),
      );
      render(<FailureDetectionSettings />);
      const input = await screen.findByPlaceholderText('http://192.168.1.10:3333');
      await waitFor(() => expect(input).not.toBeDisabled());
      await userEvent.type(input, 'http://');

      expect(await screen.findByText(/Settings not saved/, {}, { timeout: 3000 })).toBeInTheDocument();
      await new Promise((resolve) => setTimeout(resolve, 300));
      expect(input).toHaveValue('http://');
    });

    it('says so when the save is refused', async () => {
      server.use(
        http.get('/api/v1/settings/', () => HttpResponse.json(limited)),
        http.put('/api/v1/settings/', () => HttpResponse.json({ detail: 'Unknown printer: 2' }, { status: 400 })),
      );
      render(<FailureDetectionSettings />);
      const input = await screen.findByPlaceholderText(/ML_API_TOKEN/i);
      await waitFor(() => expect(input).not.toBeDisabled());
      await userEvent.type(input, 'typed');

      expect(await screen.findByText(/Unknown printer: 2/, {}, { timeout: 3000 })).toBeInTheDocument();
    });
  });

  it('shows failure class history entries with red styling', async () => {
    server.use(
      http.get('/api/v1/obico/status', () =>
        HttpResponse.json({
          ...baseStatus,
          history: [
            {
              printer_id: 1,
              task_name: 'test.3mf',
              timestamp: '2026-04-13T10:00:00Z',
              current_p: 0.9,
              score: 0.85,
              class: 'failure',
              detections: 1,
            },
          ],
        }),
      ),
    );
    render(<FailureDetectionSettings />);
    // Match the history row's score-and-class text, which looks like "failure 0.850"
    expect(await screen.findByText(/failure\s+0\.850/)).toBeInTheDocument();
  });
});