from typing import Union
import re
from youtube_transcript_api import YouTubeTranscriptApi
from youtube_transcript_api.formatters import TextFormatter
from transformers import pipeline
from fastapi import FastAPI, Query
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse

app = FastAPI()

text_summary = pipeline("summarization", model="Falconsai/text_summarization")


def extract_video_id(url):
    regex = r"(?:youtube\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|e(?:mbed)?)\/|\S*?[?&]v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})"
    match = re.search(regex, url)
    if match:
        return match.group(1)
    return None

def get_youtube_transcript(video_url):
    video_id = extract_video_id(video_url)
    if not video_id:
        return "Video ID could not be extracted."
    try:
        transcript = YouTubeTranscriptApi.get_transcript(video_id)
        formatter = TextFormatter()
        text_transcript = formatter.format_transcript(transcript)
        return text_transcript
    except Exception as e:
        return f"An error occurred: {e}"


# Get the input from the frontend
@app.get("/getdata")
def get_data(input):
    print(input)
    transcript = get_youtube_transcript(input)
    if transcript:
        summary = text_summary(transcript,min_length=10,max_length=1000,do_sample=False)
        return {"summary": summary[0]['summary_text']}
    else:
        return {"error": "Failed to get transcript from the YouTube video."}



app.mount('/', StaticFiles(directory="static", html=True), name="static")


@app.get('/')
def index() -> FileResponse:
    return FileResponse('/app/static/index.html', media_type="text/html")