import * as unpacker from 'unpacker';

import { makeEmbed } from '@/providers/base';

const mixdropBase = 'https://mixdrop.ag';
const packedRegex = /(eval\(function\(p,a,c,k,e,d\){.*{}\)\))/;
const linkRegex = /MDCore\.wurl="(.*?)";/;

export const mixdropScraper = makeEmbed({
  id: 'mixdrop',
  name: 'MixDrop',
  rank: 198,
  async scrape(ctx) {
    // Example url: https://mixdrop.co/e/pkwrgp0pizgod0
    // Example url: https://mixdrop.vc/e/pkwrgp0pizgod0
    let embedUrl = ctx.url;
    if (ctx.url.includes('primewire')) embedUrl = (await ctx.fetcher.full(ctx.url)).finalUrl;
    const embedId = new URL(embedUrl).pathname.split('/')[2];
    // constructing the url because many times mixdrop.co is returned which does not work
    // this also handels the case where preview page urls are returned
    // Example: https://mixdrop.vc/f/pkwrgp0pizgod0
    // these don't have the packed code
    const streamRes = await ctx.proxiedFetcher<string>(`/e/${embedId}`, {
      baseUrl: mixdropBase,
    });
    const packed = streamRes.match(packedRegex);

    // MixDrop uses a queue system for embeds
    // If an embed is too new, the queue will
    // not be completed and thus the packed
    // JavaScript not present
    if (!packed) {
      throw new Error('failed to find packed mixdrop JavaScript');
    }

    const unpacked = unpacker.unpack(packed[1]);
    const link = unpacked.match(linkRegex);

    if (!link) {
      throw new Error('failed to find packed mixdrop source link');
    }

    const url = link[1];

    return {
      stream: [
        {
          id: 'primary',
          type: 'file',
          flags: [],
          captions: [],
          qualities: {
            unknown: {
              type: 'mp4',
              url: url.startsWith('http') ? url : `https:${url}`, // URLs don't always start with the protocol
              headers: {
                // MixDrop requires this header on all streams
                Referer: mixdropBase,
              },
            },
          },
        },
      ],
    };
  },
});