import { TranscriptList } from '@osiris-ai/youtube-captions-sdk';

// Fetch transcript for a YouTube video
const videoId = 'dQw4w9WgXcQ'; // Rick Astley - Never Gonna Give You Up
const transcriptList = await TranscriptList.fetch(videoId);

// Get the first available transcript
const transcript = transcriptList.find(['en', 'en-US']);
const fetchedTranscript = await transcript.fetch();

// Access the transcript data
console.log(fetchedTranscript.snippets);
/*
[
  {
    text: "Never gonna give you up",
    start: 0.0,
    duration: 3.5
  },
  {
    text: "Never gonna let you down",
    start: 3.5,
    duration: 4.2
  }
  // ... more snippets
]
*/

const transcriptList = await TranscriptList.fetch('dQw4w9WgXcQ');

// Find English transcript (manual preferred)
const transcript = transcriptList.find(['en', 'en-US']);

// Find transcript, preferring auto-generated
const transcript = transcriptList.find(['en', 'en-US'], true);

const fetchedTranscript = await transcript.fetch();

// Preserve HTML formatting in transcript text
const fetchedTranscript = await transcript.fetch(true);

const englishTranscript = transcriptList.find(['en']);
const spanishTranscript = englishTranscript.translate('es');
const spanishContent = await spanishTranscript.fetch();

interface FetchedTranscript {
  snippets: FetchedTranscriptSnippet[];
  videoId: string;
  language: string;
  languageCode: string;
  isGenerated: boolean;
}

interface FetchedTranscriptSnippet {
  text: string;
  start: number;      // Start time in seconds
  duration: number;   // Duration in seconds
}

const transcriptList = await TranscriptList.fetch('dQw4w9WgXcQ');

// Try multiple languages in order of preference
try {
  const transcript = transcriptList.find(['en', 'en-US', 'es', 'fr']);
  const content = await transcript.fetch();
  console.log(`Found transcript in: ${transcript.language}`);
} catch (error) {
  console.log('No transcript found in preferred languages');
}

const transcriptList = await TranscriptList.fetch('dQw4w9WgXcQ');

for (const transcript of transcriptList) {
  console.log(`${transcript.language} (${transcript.languageCode})`);
  console.log(`Generated: ${transcript.isGenerated}`);
  console.log(`Translatable: ${transcript.isTranslatable}`);
}

const transcriptList = await TranscriptList.fetch('dQw4w9WgXcQ');
const englishTranscript = transcriptList.find(['en']);

if (englishTranscript.isTranslatable) {
  // Translate to Spanish
  const spanishTranscript = englishTranscript.translate('es');
  const spanishContent = await spanishTranscript.fetch();
  
  console.log('Spanish transcript:', spanishContent.snippets);
}

const transcriptList = await TranscriptList.fetch('dQw4w9WgXcQ');
const transcript = transcriptList.find(['en']);
const content = await transcript.fetch();

// Get full text
const fullText = content.snippets.map(s => s.text).join(' ');

// Get text for a specific time range (e.g., first 30 seconds)
const first30Seconds = content.snippets
  .filter(s => s.start < 30)
  .map(s => s.text)
  .join(' ');

// Format as SRT-style subtitles
const srtFormat = content.snippets
  .map((snippet, index) => {
    const start = formatTime(snippet.start);
    const end = formatTime(snippet.start + snippet.duration);
    return `${index + 1}\n${start} --> ${end}\n${snippet.text}\n`;
  })
  .join('\n');

function formatTime(seconds: number): string {
  const h = Math.floor(seconds / 3600);
  const m = Math.floor((seconds % 3600) / 60);
  const s = Math.floor(seconds % 60);
  const ms = Math.floor((seconds % 1) * 1000);
  return `${h.toString().padStart(2, '0')}:${m.toString().padStart(2, '0')}:${s.toString().padStart(2, '0')},${ms.toString().padStart(3, '0')}`;
}

try {
  const transcriptList = await TranscriptList.fetch('invalid_video_id');
} catch (error) {
  if (error.message.includes('YouTube request failed')) {
    console.log('Video not found or private');
  }
}

try {
  const transcript = transcriptList.find(['nonexistent_language']);
} catch (error) {
  if (error.message.includes('Transcript not found')) {
    console.log('No transcript available in requested language');
  }
}

try {
  const translated = transcript.translate('invalid_code');
} catch (error) {
  if (error.message.includes('Translation unavailable')) {
    console.log('Translation to this language is not supported');
  }
}

import { 
  TranscriptList, 
  Transcript, 
  FetchedTranscript, 
  FetchedTranscriptSnippet 
} from '@osiris-ai/youtube-captions-sdk';

// All types are automatically inferred
const transcriptList: TranscriptList = await TranscriptList.fetch('dQw4w9WgXcQ');
const transcript: Transcript = transcriptList.find(['en']);
const content: FetchedTranscript = await transcript.fetch();
const snippets: FetchedTranscriptSnippet[] = content.snippets;