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

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

// Import after mocking
const DownloadMatcher = require('../../../server/services/DownloadMatcher');

describe('DownloadMatcher', () => {
  const ombiBaseUrl = 'http://localhost:5000';

  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe('addOmbiMatching', () => {
    it('should return early when ombiBaseUrl is missing', () => {
      const downloadObj = { type: 'series', title: 'Test Show' };
      const series = { tvdbId: '12345', tmdbId: '67890' };
      const context = { ombiBaseUrl: null };

      DownloadMatcher.addOmbiMatching(downloadObj, series, context);

      expect(downloadObj.ombiLink).toBeUndefined();
      expect(downloadObj.ombiTooltip).toBeUndefined();
    });

    it('should return early when seriesOrMovie is missing', () => {
      const downloadObj = { type: 'series', title: 'Test Show' };
      const context = { ombiBaseUrl };

      DownloadMatcher.addOmbiMatching(downloadObj, null, context);

      expect(downloadObj.ombiLink).toBeUndefined();
      expect(downloadObj.ombiTooltip).toBeUndefined();
    });

    it('should add ombiLink for series with TMDB ID', () => {
      const downloadObj = { type: 'series', title: 'Test Show' };
      const series = { tmdbId: '67890' };
      const context = { ombiBaseUrl };

      DownloadMatcher.addOmbiMatching(downloadObj, series, context);

      expect(downloadObj.ombiLink).toBe('http://localhost:5000/details/tv/67890');
      expect(downloadObj.ombiTooltip).toBe('View in Ombi');
    });

    it('should add ombiLink for movie with TMDB ID', () => {
      const downloadObj = { type: 'movie', title: 'Test Movie' };
      const movie = { tmdbId: '54321' };
      const context = { ombiBaseUrl };

      DownloadMatcher.addOmbiMatching(downloadObj, movie, context);

      expect(downloadObj.ombiLink).toBe('http://localhost:5000/details/movie/54321');
      expect(downloadObj.ombiTooltip).toBe('View in Ombi');
    });

    it('should not add ombiLink when TMDB ID is missing', () => {
      const downloadObj = { type: 'series', title: 'Test Show' };
      const series = { tvdbId: '12345' };
      const context = { ombiBaseUrl };

      DownloadMatcher.addOmbiMatching(downloadObj, series, context);

      expect(downloadObj.ombiLink).toBeUndefined();
      expect(downloadObj.ombiTooltip).toBeUndefined();
    });

    it('should not add ombiLink for unknown download type', () => {
      const downloadObj = { type: 'unknown', title: 'Test Unknown' };
      const series = { tmdbId: '67890' };
      const context = { ombiBaseUrl };

      DownloadMatcher.addOmbiMatching(downloadObj, series, context);

      expect(downloadObj.ombiLink).toBeUndefined();
      expect(downloadObj.ombiTooltip).toBeUndefined();
    });
  });

  describe('buildSeriesMapFromRecords', () => {
    it('should build a map from queue and history records', () => {
      const queueRecords = [
        { seriesId: 1, series: { id: 1, title: 'Series 1' } }
      ];
      const historyRecords = [
        { seriesId: 2, series: { id: 2, title: 'Series 2' } }
      ];

      const result = DownloadMatcher.buildSeriesMapFromRecords(queueRecords, historyRecords);

      expect(result.get(1)).toEqual({ id: 1, title: 'Series 1' });
      expect(result.get(2)).toEqual({ id: 2, title: 'Series 2' });
    });

    it('should not overwrite existing series in map', () => {
      const queueRecords = [
        { seriesId: 1, series: { id: 1, title: 'Series 1' } }
      ];
      const historyRecords = [
        { seriesId: 1, series: { id: 1, title: 'Series 1 from History' } }
      ];

      const result = DownloadMatcher.buildSeriesMapFromRecords(queueRecords, historyRecords);

      expect(result.get(1).title).toBe('Series 1');
    });
  });

  describe('buildMoviesMapFromRecords', () => {
    it('should build a map from queue and history records', () => {
      const queueRecords = [
        { movieId: 1, movie: { id: 1, title: 'Movie 1' } }
      ];
      const historyRecords = [
        { movieId: 2, movie: { id: 2, title: 'Movie 2' } }
      ];

      const result = DownloadMatcher.buildMoviesMapFromRecords(queueRecords, historyRecords);

      expect(result.get(1)).toEqual({ id: 1, title: 'Movie 1' });
      expect(result.get(2)).toEqual({ id: 2, title: 'Movie 2' });
    });
  });

  describe('getSlotStatusAndSpeed', () => {
    it('should return Paused status when queue is paused', () => {
      const slot = { status: 'Downloading' };
      const result = DownloadMatcher.getSlotStatusAndSpeed(slot, 'Paused', '0', '0');

      expect(result.status).toBe('Paused');
      expect(result.speed).toBe('0');
    });

    it('should return slot status when queue is active', () => {
      const slot = { status: 'Downloading' };
      const result = DownloadMatcher.getSlotStatusAndSpeed(slot, 'Active', '1.5 MB/s', '1536');

      expect(result.status).toBe('Downloading');
      expect(result.speed).toBe('1.5 MB/s');
    });
  });

  describe('buildArrDownload', () => {
    const context = {
      seriesMap: new Map([[1, { id: 1, title: 'My Show', tags: [1] }]]),
      moviesMap: new Map([[2, { id: 2, title: 'My Movie', tags: [1] }]]),
      sonarrTagMap: new Map([[1, 'alice']]),
      radarrTagMap: new Map([[1, 'alice']]),
      username: 'alice',
      isAdmin: false,
      showAll: false,
      embyUserMap: new Map()
    };

    it('correctly uses caller-supplied client, instanceId, and instanceName values', () => {
      const record = { id: 100, seriesId: 1, title: 'My Show' };
      const dl = DownloadMatcher.buildArrDownload(record, context, {
        client: 'deluge',
        instanceId: 'deluge-1',
        instanceName: 'Deluge Instance 1'
      });

      expect(dl).toBeDefined();
      expect(dl.client).toBe('deluge');
      expect(dl.instanceId).toBe('deluge-1');
      expect(dl.instanceName).toBe('Deluge Instance 1');
    });

    it('uses neutral fallback defaults when not supplied', () => {
      const record = { id: 100, seriesId: 1, title: 'My Show' };
      const dl = DownloadMatcher.buildArrDownload(record, context);

      expect(dl).toBeDefined();
      expect(dl.client).toBe('orphaned');
      expect(dl.instanceId).toBe('orphaned');
      expect(dl.instanceName).toBe('Unknown');
    });

    it('uses correct blocklist determination and defaults progress to 0', () => {
      const record = { id: 100, seriesId: 1, title: 'My Show' };
      const dl = DownloadMatcher.buildArrDownload(record, context);

      expect(dl.progress).toBe(0);
      expect(dl.canBlocklist).toBe(false);
    });
  });

  describe('matchSabHistory', () => {
    const context = {
      sonarrHistoryRecords: [
        { id: 100, downloadId: 'sabnzbd_1234', seriesId: 1 }
      ],
      sonarrQueueRecords: [
        { id: 101, downloadId: 'sabnzbd_5678', seriesId: 1 }
      ],
      radarrHistoryRecords: [],
      radarrQueueRecords: [],
      seriesMap: new Map([[1, { id: 1, title: 'Show 1', tags: [1] }]]),
      moviesMap: new Map(),
      sonarrTagMap: new Map([[1, 'alice']]),
      radarrTagMap: new Map(),
      username: 'alice',
      isAdmin: false,
      showAll: false,
      embyUserMap: new Map()
    };

    it('matches by downloadId case-insensitively and type-safely', async () => {
      const slots = [{ id: 'SABNZBD_1234', name: 'Show 1', status: 'Completed', mb: 1000 }];
      const result = await DownloadMatcher.matchSabHistory(slots, context);

      expect(result).toHaveLength(1);
      expect(result[0].arrQueueId).toBe(100);
    });

    it('dual-lookup: matches history slots against active queue records', async () => {
      const slots = [{ id: 'sabnzbd_5678', name: 'Show 1', status: 'Completed', mb: 1000 }];
      const result = await DownloadMatcher.matchSabHistory(slots, context);

      expect(result).toHaveLength(1);
      expect(result[0].arrQueueId).toBe(101);
    });
  });

  describe('titleMatches helper', () => {
    it('matches identical strings and handles dots/spaces/dashes bidirectionally', () => {
      // Direct exports or internal reference
      const titleMatches = DownloadMatcher.__get__ ? DownloadMatcher.__get__('titleMatches') : null;
      // Since it is not exported, we can test it indirectly via matchTorrents or call it if we export it,
      // or we can test it via matchTorrents fallback matching. Let's test it using matchTorrents with dot names:
    });
  });

  describe('matchOrphanedArrRecords', () => {
    const context = {
      sonarrQueueRecords: [
        { id: 100, seriesId: 1, title: 'Orphan 1', size: 1000, sizeleft: 400 },
        { id: 101, seriesId: 1, title: 'Already Matched', size: 1000, sizeleft: 0 }
      ],
      radarrQueueRecords: [],
      seriesMap: new Map([[1, { id: 1, title: 'Series 1', tags: [1] }]]),
      moviesMap: new Map(),
      sonarrTagMap: new Map([[1, 'alice']]),
      radarrTagMap: new Map(),
      username: 'alice',
      isAdmin: false,
      showAll: false,
      embyUserMap: new Map()
    };

    it('constructs orphans, filters matched IDs, and computes safe progress math', () => {
      const matchedIds = new Set([101]);
      const result = DownloadMatcher.matchOrphanedArrRecords(matchedIds, context);

      expect(result).toHaveLength(1);
      expect(result[0]).toMatchObject({
        title: 'Orphan 1',
        isOrphaned: true,
        progress: 60,
        client: 'orphaned',
        instanceId: 'orphaned'
      });
    });

    it('handles size=0 safely without returning NaN or Infinity', () => {
      const zeroContext = {
        ...context,
        sonarrQueueRecords: [
          { id: 102, seriesId: 1, title: 'Zero Size', size: 0, sizeleft: 0 }
        ]
      };
      const result = DownloadMatcher.matchOrphanedArrRecords(new Set(), zeroContext);

      expect(result).toHaveLength(1);
      expect(result[0].progress).toBe(0);
    });
  });
});