import { NextRequest, NextResponse } from 'next/server'
import { verifySignatureInTweet } from '../../../utils/verifyTweet';

export async function POST(req: NextRequest): Promise<NextResponse> {
  try {
    const { tweetUrl } = await req.json();

    const url = `https://publish.twitter.com/oembed?url=${tweetUrl}&maxwidth=600`;

    const response = await fetch(url);
    const data = await response.json();
    const { handle, memeUrl, txHash } = extractData(data.html);
    if (!handle || !memeUrl || !txHash) {
      return NextResponse.json(
        { error: 'Verification failed' },
        { status: 500 }
      )
    }

    const isVerified = await verifySignatureInTweet(txHash);
    const isHandleCorrect = handle === process.env.ACCOUNT_HANDLE;

    return NextResponse.json({isVerified: isVerified && isHandleCorrect})
  } catch (error) {
    console.error('Error while verifying tweet:', error)
    return NextResponse.json(
      { error: 'Failed to verify tweet' },
      { status: 500 }
    )
  }
}

const extractData = (tweet: string | object) => {
  const tweetText = typeof tweet === 'string' ? tweet : JSON.stringify(tweet);

  const decodedTweet = tweetText.replace(/&#39;/g, "'").replace(/&quot;/g, '"');

  const urlMatch = decodedTweet.match(/<a href="(https:\/\/t.co\/[^"]+)">/);
  const txHashMatch = decodedTweet.match(/TX Hash: '([^']+)'/);
  const handleMatch = decodedTweet.match(/@([A-Za-z0-9_]+)/);

  return {
    memeUrl: urlMatch ? urlMatch[1] : null,
    txHash: txHashMatch ? txHashMatch[1].trim() : null,
    handle: handleMatch ? handleMatch[1] : null,
  };
};