// Copyright (c) 2026 Gordon Bolton. MIT License.
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import nock from 'nock';

// Mock the logger and config before importing the registry
vi.mock('../../server/utils/logger', () => ({
  logToFile: vi.fn()
}));

// Mock config to return test data
const mockOmbiInstances = [
  { id: 'ombi-test', name: 'Test Ombi', url: 'http://localhost:5000', apiKey: 'test-key' }
];

const mockSonarrInstances = [
  { id: 'sonarr-test', name: 'Test Sonarr', url: 'http://localhost:8989', apiKey: 'sonarr-key' }
];

const mockRadarrInstances = [
  { id: 'radarr-test', name: 'Test Radarr', url: 'http://localhost:7878', apiKey: 'radarr-key' }
];

vi.mock('../../server/utils/config', () => ({
  getSonarrInstances: vi.fn(() => mockSonarrInstances),
  getRadarrInstances: vi.fn(() => mockRadarrInstances),
  getOmbiInstances: vi.fn(() => mockOmbiInstances)
}));

// Import the registry after mocking
const arrRetrieverRegistry = require('../../server/utils/arrRetrievers');
const OmbiRetriever = require('../../server/clients/OmbiRetriever');
const ArrRetriever = require('../../server/clients/ArrRetriever');

describe('arrRetrieverRegistry', () => {
  beforeEach(() => {
    // Reset the registry state before each test
    arrRetrieverRegistry.retrievers.clear();
    arrRetrieverRegistry.initialized = false;
    nock.cleanAll();
  });

  afterEach(() => {
    nock.cleanAll();
  });

  describe('initialize', () => {
    it('should initialize without errors', async () => {
      await expect(arrRetrieverRegistry.initialize()).resolves.not.toThrow();
    });

    it('should not reinitialize if already initialized', async () => {
      await arrRetrieverRegistry.initialize();
      const firstRetrieverCount = arrRetrieverRegistry.getOmbiRetrievers().length;

      await arrRetrieverRegistry.initialize();
      const secondRetrieverCount = arrRetrieverRegistry.getOmbiRetrievers().length;

      expect(secondRetrieverCount).toBe(firstRetrieverCount);
    });
  });

  describe('getOmbiRetrievers', () => {
    it('should return Ombi retrievers only', async () => {
      await arrRetrieverRegistry.initialize();

      const ombiRetrievers = arrRetrieverRegistry.getOmbiRetrievers();
      expect(ombiRetrievers.length).toBeGreaterThanOrEqual(0);
      ombiRetrievers.forEach(retriever => {
        expect(retriever.getRetrieverType()).toBe('ombi');
      });
    });

  });

  describe('getOmbiRequests', () => {
    it('should return movie and TV request arrays', async () => {
      await arrRetrieverRegistry.initialize();

      const result = await arrRetrieverRegistry.getOmbiRequests();

      expect(result).toHaveProperty('movie');
      expect(result).toHaveProperty('tv');
      expect(Array.isArray(result.movie)).toBe(true);
      expect(Array.isArray(result.tv)).toBe(true);
    });

    it('should handle errors gracefully', async () => {
      nock('http://localhost:5000')
        .get('/api/v1/Request/movie')
        .reply(500, { error: 'Server Error' });

      nock('http://localhost:5000')
        .get('/api/v1/Request/tv')
        .reply(500, { error: 'Server Error' });

      await arrRetrieverRegistry.initialize();

      const result = await arrRetrieverRegistry.getOmbiRequests();

      expect(result).toEqual({ movie: [], tv: [] });
    });

  });

  describe('getOmbiRequestsByType', () => {
    it('should return grouped requests by type', async () => {
      await arrRetrieverRegistry.initialize();

      const result = await arrRetrieverRegistry.getOmbiRequestsByType();

      expect(result).toHaveProperty('movie');
      expect(result).toHaveProperty('tv');
      expect(Array.isArray(result.movie)).toBe(true);
      expect(Array.isArray(result.tv)).toBe(true);
    });
  });

  describe('findOmbiRequest', () => {
    it('should return null for unknown type', async () => {
      await arrRetrieverRegistry.initialize();
      const result = await arrRetrieverRegistry.findOmbiRequest('unknown', { tmdbId: '12345' });

      expect(result).toBeNull();
    });
  });

  describe('getAllRetrievers', () => {
    it('should return all retrievers', async () => {
      await arrRetrieverRegistry.initialize();

      const allRetrievers = arrRetrieverRegistry.getAllRetrievers();
      expect(Array.isArray(allRetrievers)).toBe(true);
    });
  });

  describe('getRetriever', () => {
    it('should return null for non-existent instance', async () => {
      await arrRetrieverRegistry.initialize();

      const retriever = arrRetrieverRegistry.getRetriever('non-existent');
      expect(retriever).toBeNull();
    });
  });

  describe('getRetrieversByType', () => {
    it('should filter retrievers by type', async () => {
      await arrRetrieverRegistry.initialize();

      const sonarrRetrievers = arrRetrieverRegistry.getRetrieversByType('sonarr');
      const radarrRetrievers = arrRetrieverRegistry.getRetrieversByType('radarr');
      const ombiRetrievers = arrRetrieverRegistry.getRetrieversByType('ombi');

      sonarrRetrievers.forEach(r => expect(r.getRetrieverType()).toBe('sonarr'));
      radarrRetrievers.forEach(r => expect(r.getRetrieverType()).toBe('radarr'));
      ombiRetrievers.forEach(r => expect(r.getRetrieverType()).toBe('ombi'));
    });
  });

  describe('matching helper functions', () => {
    it('should expose matchDownload function', () => {
      expect(arrRetrieverRegistry.matchDownload).toBeDefined();
      expect(typeof arrRetrieverRegistry.matchDownload).toBe('function');
    });

    it('should expose matchDownloadToArr alias', () => {
      expect(arrRetrieverRegistry.matchDownloadToArr).toBeDefined();
      expect(typeof arrRetrieverRegistry.matchDownloadToArr).toBe('function');
    });

    it('should expose aggregateMatch alias', () => {
      expect(arrRetrieverRegistry.aggregateMatch).toBeDefined();
      expect(typeof arrRetrieverRegistry.aggregateMatch).toBe('function');
    });

    it('should expose matchingHelper alias', () => {
      expect(arrRetrieverRegistry.matchingHelper).toBeDefined();
      expect(typeof arrRetrieverRegistry.matchingHelper).toBe('function');
    });

    it('should expose compareDownloadAndArr alias', () => {
      expect(arrRetrieverRegistry.compareDownloadAndArr).toBeDefined();
      expect(typeof arrRetrieverRegistry.compareDownloadAndArr).toBe('function');
    });
  });
});

describe('OmbiRetriever._hydrateRequest', () => {
  let retriever;

  beforeEach(() => {
    retriever = new OmbiRetriever({
      id: 'ombi-test',
      name: 'Test Ombi',
      url: 'http://localhost:5000',
      apiKey: 'test-key'
    });

    // Seed the userMap cache
    retriever.cache.userMap.set('user-1', {
      id: 'user-1',
      userName: 'testuser',
      alias: 'TestUser',
      userAlias: 'TestUser',
      normalizedUserName: 'testuser'
    });
    retriever.cache.userMap.set('user-2', {
      id: 'user-2',
      userName: 'adminuser',
      alias: 'AdminUser',
      userAlias: 'AdminUser',
      normalizedUserName: 'adminuser'
    });
  });

  it('hydrates top-level requestedUserId', () => {
    const req = {
      id: 1,
      requestedUserId: 'user-1',
      requestedUser: {}
    };
    const result = retriever._hydrateRequest(req);
    expect(result.requestedUser.userName).toBe('testuser');
    expect(result.requestedUser.alias).toBe('TestUser');
  });

  it('hydrates childRequests requestedUserId (TV requests)', () => {
    const req = {
      id: 3,
      title: 'Test Show',
      requestedUserId: 'user-1',
      requestedUser: {},
      childRequests: [
        {
          id: 10,
          requestedUserId: 'user-2',
          requestedUser: {}
        }
      ]
    };
    const result = retriever._hydrateRequest(req);
    expect(result.requestedUser.userName).toBe('testuser');
    expect(result.childRequests[0].requestedUser.userName).toBe('adminuser');
    expect(result.childRequests[0].requestedUser.alias).toBe('AdminUser');
  });

  it('promotes requestedDate from childRequests to top level', () => {
    const req = {
      id: 3,
      title: 'Test Show',
      childRequests: [
        {
          id: 10,
          requestedDate: '2026-05-15T10:00:00.000Z'
        }
      ]
    };
    const result = retriever._hydrateRequest(req);
    expect(result.requestedDate).toBe('2026-05-15T10:00:00.000Z');
    expect(result.childRequests[0].requestedDate).toBe('2026-05-15T10:00:00.000Z');
  });

  it('does not overwrite existing top-level requestedDate', () => {
    const req = {
      id: 3,
      requestedDate: '2026-01-01T00:00:00.000Z',
      childRequests: [
        {
          id: 10,
          requestedDate: '2026-05-15T10:00:00.000Z'
        }
      ]
    };
    const result = retriever._hydrateRequest(req);
    expect(result.requestedDate).toBe('2026-01-01T00:00:00.000Z');
  });

  it('handles PascalCase RequestedDate from childRequests', () => {
    const req = {
      id: 3,
      childRequests: [
        {
          id: 10,
          RequestedDate: '2026-06-01T12:00:00.000Z'
        }
      ]
    };
    const result = retriever._hydrateRequest(req);
    expect(result.requestedDate).toBe('2026-06-01T12:00:00.000Z');
  });

  it('returns unmodified request when no hydration needed', () => {
    const req = {
      id: 1,
      title: 'Test Movie',
      requestedUser: { userName: 'existing', alias: 'Existing' }
    };
    const result = retriever._hydrateRequest(req);
    expect(result).toEqual(req);
  });

  it('handles null childRequests gracefully', () => {
    const req = {
      id: 3,
      childRequests: null
    };
    const result = retriever._hydrateRequest(req);
    expect(result).toEqual(req);
  });

  it('handles empty childRequests gracefully', () => {
    const req = {
      id: 3,
      childRequests: []
    };
    const result = retriever._hydrateRequest(req);
    expect(result).toEqual(req);
  });

  it('skips child hydration when child already has valid requestedUser', () => {
    const req = {
      id: 3,
      childRequests: [
        {
          id: 10,
          requestedUserId: 'user-1',
          requestedUser: { userName: 'already_set', alias: 'AlreadySet' }
        }
      ]
    };
    const result = retriever._hydrateRequest(req);
    expect(result.childRequests[0].requestedUser.userName).toBe('already_set');
    expect(result.childRequests[0].requestedUser.alias).toBe('AlreadySet');
  });
});