const Telegraf = require('telegraf')

const bot = new Telegraf(process.env.BOT_TOKEN)

const spam_suspect = new Map();

bot.on('channel_post', async (ctx) => {
  let chat_id = ctx.chat.id;
  let msg = ctx.update.channel_post.text;
  // console.log(ctx)
  if (msg.match(/t\.me\/joinchat/i)) {
    ctx.telegram.deleteMessage(chat_id, ctx.update.channel_post.message_id);
  }

  if (msg.match(/porno/i)) {
    ctx.telegram.deleteMessage(chat_id, ctx.update.channel_post.message_id);
  }

  if (ctx.update.channel_post.reply_to_message !== undefined) {
    let comment_is_spam = ctx.update.channel_post.text.match(/spam/i)
    if (comment_is_spam) {
      let msg_id = ctx.update.channel_post.reply_to_message.message_id
      let vote_counter = spam_suspect.get(msg_id) || 1;
      if (vote_counter < 2) {
        vote_counter++;
        spam_suspect.set(msg_id, vote_counter)
      } else {
        spam_suspect.delete(msg_id)
        ctx.telegram.deleteMessage(chat_id, msg_id);
      }
    }
  }
})

bot.startPolling()