// Copyright (c) 2026 Gordon Bolton. MIT License.
import QBittorrentClient from '../../../server/clients/QBittorrentClient.js';
import nock from 'nock';
import { vi } from 'vitest';

vi.mock('../../../server/utils/logger', () => ({
  logToFile: vi.fn()
}));

describe('QBittorrentClient', () => {
  let client;
  let mockConfig;

  beforeEach(() => {
    mockConfig = {
      id: 'test-qb',
      name: 'Test qBittorrent',
      url: 'http://localhost:8080',
      username: 'admin',
      password: 'adminadmin'
    };
    
    client = new QBittorrentClient(mockConfig);

    // Clear all mocks
    vi.clearAllMocks();
  });

  describe('Constructor', () => {
    it('should initialize with correct properties', () => {
      expect(client.getClientType()).toBe('qbittorrent');
      expect(client.getInstanceId()).toBe('test-qb');
      expect(client.name).toBe('Test qBittorrent');
      expect(client.url).toBe('http://localhost:8080');
      expect(client.authCookie).toBeNull();
      expect(client.lastRid).toBe(0);
      expect(client.torrentMap).toBeInstanceOf(Map);
      expect(client.fallbackThisCycle).toBe(false);
    });
  });

  describe('Authentication', () => {
    it('should login successfully with valid credentials', async () => {
      nock('http://localhost:8080')
        .post('/api/v2/auth/login', 'username=admin&password=adminadmin')
        .reply(200, {}, { 'set-cookie': ['SID=test-cookie'] });
      
      const result = await client.login();
      
      expect(result).toBe(true);
      expect(client.authCookie).toBe('SID=test-cookie');
    });

    it('should handle login failure', async () => {
      nock('http://localhost:8080')
        .post('/api/v2/auth/login', 'username=admin&password=adminadmin')
        .reply(200, {}, {});
      
      const result = await client.login();
      
      expect(result).toBe(false);
      expect(client.authCookie).toBeNull();
    });

    it('should handle login error', async () => {
      nock('http://localhost:8080')
        .post('/api/v2/auth/login', 'username=admin&password=adminadmin')
        .replyWithError(new Error('Network error'));
      
      const result = await client.login();
      
      expect(result).toBe(false);
      expect(client.authCookie).toBeNull();
    });
  });

  describe('Connection Test', () => {
    it('should test connection successfully', async () => {
      // Mock login success
      client.login = vi.fn().mockResolvedValue(true);

      // Mock version request
      const mockResponse = { data: 'v4.3.5' };
      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
      
      const result = await client.testConnection();
      
      expect(result).toBe(true);
      expect(client.makeRequest).toHaveBeenCalledWith('/api/v2/app/version');
    });

    it('should handle connection test failure', async () => {
      client.login = vi.fn().mockRejectedValue(new Error('Auth failed'));
      
      const result = await client.testConnection();
      
      expect(result).toBe(false);
    });
  });

  describe('Download Normalization', () => {
    it('should normalize torrent data correctly', () => {
      const torrent = {
        hash: 'abc123',
        name: 'Test Torrent',
        state: 'downloading',
        progress: 0.75,
        size: 1000000000,
        completed: 750000000,
        dlspeed: 1048576,
        eta: 3600,
        category: 'movies',
        tags: 'movie,hd',
        content_path: '/downloads/test',
        added_on: 1640995200
      };

      const normalized = client.normalizeDownload(torrent);

      expect(normalized).toEqual({
        id: 'abc123',
        title: 'Test Torrent',
        type: 'torrent',
        client: 'qbittorrent',
        instanceId: 'test-qb',
        instanceName: 'Test qBittorrent',
        status: 'Downloading',
        progress: 75,
        size: 1000000000,
        downloaded: 750000000,
        speed: 1048576,
        eta: 3600,
        category: 'movies',
        tags: ['movie', 'hd'],
        savePath: '/downloads/test',
        addedOn: '2022-01-01T00:00:00.000Z',
        raw: torrent
      });
    });

    it('should handle unknown torrent states', () => {
      const torrent = {
        hash: 'abc123',
        name: 'Test Torrent',
        state: 'unknown_state',
        progress: 0.5,
        size: 1000000,
        completed: 500000,
        dlspeed: 0,
        eta: -1
      };

      const normalized = client.normalizeDownload(torrent);

      expect(normalized.status).toBe('unknown_state');
      expect(normalized.eta).toBeNull();
    });

    it('should handle missing completed field', () => {
      const torrent = {
        hash: 'abc123',
        name: 'Test Torrent',
        state: 'downloading',
        progress: 0.5,
        size: 1000000,
        dlspeed: 0
      };

      const normalized = client.normalizeDownload(torrent);

      expect(normalized.downloaded).toBe(500000);
    });
  });

  describe('Fallback Flag Management', () => {
    it('should reset fallback flag', () => {
      client.fallbackThisCycle = true;
      client.resetFallbackFlag();
      expect(client.fallbackThisCycle).toBe(false);
    });
  });

  describe('Error Handling', () => {
    it('should handle makeRequest authentication failure', async () => {
      client.authCookie = 'invalid-cookie';
      
      // First request fails with 403
      nock('http://localhost:8080')
        .get('/test')
        .reply(403, {});

      // Re-authentication succeeds
      nock('http://localhost:8080')
        .post('/api/v2/auth/login', 'username=admin&password=adminadmin')
        .reply(200, {}, { 'set-cookie': ['SID=new-cookie'] });

      // Retry succeeds
      nock('http://localhost:8080')
        .get('/test')
        .reply(200, { data: 'success' });
      
      const result = await client.makeRequest('/test');
      
      expect(result.data).toEqual({ data: 'success' });
      expect(client.authCookie).toBe('SID=new-cookie');
    });
  });
});