"""Simple Reader that reads transcript of youtube video."""
from typing import Any, List, Optional

from llama_index.readers.base import BaseReader
from llama_index.readers.schema.base import Document


class YoutubeTranscriptReader(BaseReader):
    """Youtube Transcript reader."""

    def load_data(
        self,
        ytlinks: List[str],
        languages: Optional[List[str]] = ["en"],
        **load_kwargs: Any
    ) -> List[Document]:
        """Load data from the input directory.

        Args:
            pages (List[str]): List of youtube links \
                for which transcripts are to be read.

        """
        from youtube_transcript_api import YouTubeTranscriptApi

        results = []
        for link in ytlinks:
            video_id = link.split("?v=")[-1]
            srt = YouTubeTranscriptApi.get_transcript(video_id, languages=languages)
            transcript = ""
            for chunk in srt:
                transcript = transcript + chunk["text"] + "\n"
            results.append(Document(transcript))
        return results