import type { Candidate, SearchParams, SubtitleProvider } from '../types/index.js';
import { generateMockArtifact } from '../lib/mockArtifact.js';
import { hashString, seeded } from '../lib/deterministic.js';
import { env } from '../config/env.js';

export class OpenSubtitlesProvider implements SubtitleProvider {
  async search(params: SearchParams): Promise<Candidate[]> {
    // TODO(v2): real OpenSubtitles API integration.
    const key = `${params.title}|${params.year}|${params.season}|${params.episode}|os`;
    const rnd = seeded(hashString(key));
    const base = params.title.replace(/\s+/g, '.');
    const directForMovie = params.type === 'movie' && rnd() > 0.4;
    return [
      {
        id: `os-${hashString(`${key}-a`)}`,
        provider: 'opensubtitles',
        displayName: `OS ${base} Official`,
        downloadType: directForMovie ? 'direct' : 'archiveZip',
        downloadUrl: directForMovie ? `mock://os/${base}/direct.srt` : `mock://os/${base}/archive.zip`,
        lang: 'tr',
        releaseHints: ['1080p', rnd() > 0.5 ? 'x265' : 'x264', 'flux'],
        scoreHints: ['api_match'],
        isHI: rnd() > 0.8,
        isForced: rnd() > 0.92
      },
      {
        id: `os-${hashString(`${key}-b`)}`,
        provider: 'opensubtitles',
        displayName: `OS ${base} Backup`,
        downloadType: 'archiveZip',
        downloadUrl: `mock://os/${base}/backup.zip`,
        lang: 'tr',
        releaseHints: ['720p', 'x264'],
        scoreHints: ['backup'],
        isHI: false,
        isForced: false
      }
    ];
  }

  async download(candidate: Candidate, params: SearchParams, jobToken: string) {
    const artifact = await generateMockArtifact(candidate, params, jobToken, `${env.tempRoot}/${jobToken}/download`);
    return { type: artifact.type, filePath: artifact.filePath, candidateId: candidate.id };
  }
}