const { finished } = require('stream/promises');
const concat = require('concat-stream');
const { Readable } = require('stream');
const FormData = require('form-data');
const fs = require('fs');
const maxRetries = 5;
const retryDelay = 5000; // 5 seconds

// Private functions (only called locally)

const DownloadNitradoFile = async(client, filename, outputDir)  => {
  for (let retries = 0; retries <= maxRetries; retries++) {
    try {
      const res = await fetch(`https://api.nitrado.net/services/${client.config.Nitrado.ServerID}/gameservers/file_server/download?file=${filename}`, {
        headers: {
          "Authorization": client.config.Nitrado.Auth
        }
      }).then(response => 
        response.json().then(data => data)
      ).then(res => res);
    
      const stream = fs.createWriteStream(outputDir);
      if (!res.data || !res.data.token) {
        client.error(`Error downloading File "${filename}":`);
        client.error(res);
        return -1;
      }
      const { body } = await fetch(res.data.token.url);
      await finished(Readable.fromWeb(body).pipe(stream));
      return 0;
    } catch (error) {
      if (retries === maxRetries) throw new Error(`DownloadNitradoFile: Failed to fetch data after ${maxRetries} retries`);
    }
    await new Promise(resolve => setTimeout(resolve, retryDelay)); // Delay before retrying
  }
}

// Public functions (called externally)

module.exports = {
  /*
    Export explicit function names; i.e BanPlayer() & UnbanPlayer() 
    that call to the private parent function HandlePlayerBan() 
    rather than write two whole different functions for each.
  */

  BanPlayer:   async (client, gamertag) => HandlePlayerBan(client, gamertag, true),
  UnbanPlayer: async (client, gamertag) => HandlePlayerBan(client, gamertag, false),
  
  RestartServer: async (client) => {
    for (let retries = 0; retries < maxRetries; retries++) {
      try {
        const res = await fetch(`https://api.nitrado.net/services/${client.config.Nitrado.ServerID}/gameservers/restart`, {
          method: "POST",
          headers: {
            "Authorization": client.config.Nitrado.Auth,
          }
        }).then(response => 
          response.json().then(data => data)
        ).then(res => res);    
      } catch (error) {
        if (retries === maxRetries) throw new Error(`RestartServer: Failed to fetch data after ${maxRetries} retries`);
      }
      await new Promise(resolve => setTimeout(resolve, retryDelay)); // Delay before retrying
    }
  },
}