import { beforeEach, describe, expect, it, vi } from 'vitest';
import {
  createResolution,
  deleteResolution,
  getFfmpegSettings,
  getHdhrSettings,
  getIptvSettings,
  getLoggingSettings,
  getPlayoutSettings,
  getResolutions,
  getScannerSettings,
  getUiSettings,
  getXmltvSettings,
  messageFromSettingsError,
  updateFfmpegSettings,
  updateHdhrSettings,
  updateIptvSettings,
  updateLoggingSettings,
  updatePlayoutSettings,
  updateScannerSettings,
  updateUiSettings,
  updateXmltvSettings
} from './settings';

function jsonResponse(body: unknown, status = 200): Response {
  return new Response(JSON.stringify(body), {
    headers: { 'Content-Type': 'application/json' },
    status
  });
}

function lastFetchCall(): [RequestInfo | URL, RequestInit | undefined] {
  const calls = vi.mocked(window.fetch).mock.calls;
  return calls[calls.length - 1] as [RequestInfo | URL, RequestInit | undefined];
}

describe('settings API module', () => {
  beforeEach(() => {
    window.localStorage.clear();
    vi.restoreAllMocks();
  });

  it('fetches ffmpeg settings from GET /api/v1/settings/ffmpeg', async () => {
    const settings = { fFmpegPath: '/usr/bin/ffmpeg' };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getFfmpegSettings()).resolves.toMatchObject(settings);
    const [path] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/ffmpeg');
  });

  it('PUTs ffmpeg settings to /api/v1/settings/ffmpeg', async () => {
    const body = { fFmpegPath: '/usr/bin/ffmpeg', hlsDirectOutputFormat: 'MpegTs' as const };
    vi.spyOn(window, 'fetch').mockResolvedValue(jsonResponse(body));

    await updateFfmpegSettings(body as never);

    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/ffmpeg');
    expect(init?.method).toBe('PUT');
    expect(JSON.parse(init?.body as string)).toMatchObject({ fFmpegPath: '/usr/bin/ffmpeg' });
  });

  it('fetches and updates playout settings', async () => {
    const settings = { daysToBuild: 2, scriptedScheduleTimeoutSeconds: 30, skipMissingItems: true };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getPlayoutSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/playout');

    await updatePlayoutSettings(settings);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/playout');
    expect(init?.method).toBe('PUT');
  });

  it('fetches and updates xmltv settings', async () => {
    const settings = { blockBehavior: 'SplitTimeEvenly' as const, daysToBuild: 2, timeZone: 'Local' as const };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getXmltvSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/xmltv');

    await updateXmltvSettings(settings);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/xmltv');
    expect(init?.method).toBe('PUT');
  });

  it('fetches and updates scanner settings', async () => {
    const settings = { libraryRefreshInterval: 6 };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getScannerSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/scanner');

    await updateScannerSettings(settings);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/scanner');
    expect(init?.method).toBe('PUT');
  });

  it('fetches and updates logging settings', async () => {
    const settings = {
      defaultMinimumLogLevel: 'Information' as const,
      httpMinimumLogLevel: 'Warning' as const,
      scanningMinimumLogLevel: 'Information' as const,
      schedulingMinimumLogLevel: 'Information' as const,
      searchingMinimumLogLevel: 'Information' as const,
      streamingMinimumLogLevel: 'Information' as const
    };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getLoggingSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/logging');

    await updateLoggingSettings(settings);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/logging');
    expect(init?.method).toBe('PUT');
  });

  it('fetches and updates UI settings', async () => {
    const settings = { isDarkMode: true, language: 'en-US' };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getUiSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/ui');

    await updateUiSettings(settings);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/ui');
    expect(init?.method).toBe('PUT');
  });

  it('fetches and updates HDHR settings', async () => {
    const settings = { tunerCount: 2, uuid: 'abc-123' };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getHdhrSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/hdhr');

    await updateHdhrSettings({ tunerCount: 2 });
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/hdhr');
    expect(init?.method).toBe('PUT');
    expect(JSON.parse(init?.body as string)).toMatchObject({ tunerCount: 2 });
  });

  it('fetches and updates IPTV settings', async () => {
    const settings = { baseUrl: 'http://192.168.1.99:8409' };
    vi.spyOn(window, 'fetch').mockImplementation(() => Promise.resolve(jsonResponse(settings)));

    await expect(getIptvSettings()).resolves.toMatchObject(settings);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/iptv');

    await updateIptvSettings(settings);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/iptv');
    expect(init?.method).toBe('PUT');
    expect(JSON.parse(init?.body as string)).toMatchObject({ baseUrl: 'http://192.168.1.99:8409' });
  });

  it('fetches resolutions from GET /api/v1/settings/resolutions', async () => {
    const resolutions = [{ height: 1080, id: 1, isCustom: false, name: '1920x1080', width: 1920 }];
    vi.spyOn(window, 'fetch').mockResolvedValue(jsonResponse(resolutions));

    await expect(getResolutions()).resolves.toMatchObject(resolutions);
    expect(lastFetchCall()[0].toString()).toBe('/api/v1/settings/resolutions');
  });

  it('creates a custom resolution via POST /api/v1/settings/resolutions', async () => {
    const created = { height: 1080, id: 3, isCustom: true, name: '2560x1080', width: 2560 };
    vi.spyOn(window, 'fetch').mockResolvedValue(jsonResponse(created, 201));

    await expect(createResolution({ height: 1080, width: 2560 })).resolves.toMatchObject(created);
    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/resolutions');
    expect(init?.method).toBe('POST');
    expect(JSON.parse(init?.body as string)).toMatchObject({ height: 1080, width: 2560 });
  });

  it('deletes a custom resolution via DELETE /api/v1/settings/resolutions/{id}', async () => {
    vi.spyOn(window, 'fetch').mockResolvedValue(new Response(null, { status: 204 }));

    await deleteResolution(3);

    const [path, init] = lastFetchCall();
    expect(path.toString()).toBe('/api/v1/settings/resolutions/3');
    expect(init?.method).toBe('DELETE');
  });

  describe('messageFromSettingsError', () => {
    it('prefers the ApiError detail over the fallback message', async () => {
      vi.spyOn(window, 'fetch').mockResolvedValue(jsonResponse({ detail: 'ffmpeg path does not exist', title: 'Unprocessable' }, 422));

      await expect(getFfmpegSettings()).rejects.toMatchObject({ detail: 'ffmpeg path does not exist' });
    });

    it('falls back to a default message for unknown errors', () => {
      expect(messageFromSettingsError('boom', 'Unable to load settings')).toBe('Unable to load settings');
    });
  });
});