import isDev from 'electron-is-dev';
import path from 'path';
import { spawn } from 'child_process';
import fs from 'fs-extra';
import ps from 'node:process';
import proxyServer from './proxy-server.js';
import tcpPortUsed from 'tcp-port-used';
import EnvPaths from 'env-paths';
import { fileURLToPath } from 'url';
const dirname = path.join(path.dirname(fileURLToPath(import.meta.url)));
const envPaths = EnvPaths('plebbit', { suffix: false });

// use this custom function instead of spawnSync for better logging
// also spawnSync might have been causing crash on start on windows
const spawnAsync = (...args) =>
  new Promise((resolve, reject) => {
    const spawedProcess = spawn(...args);
    spawedProcess.on('exit', (exitCode, signal) => {
      if (exitCode === 0) resolve();
      else reject(Error(`spawnAsync process '${spawedProcess.pid}' exited with code '${exitCode}' signal '${signal}'`));
    });
    spawedProcess.stderr.on('data', (data) => console.error(data.toString()));
    spawedProcess.stdin.on('data', (data) => console.log(data.toString()));
    spawedProcess.stdout.on('data', (data) => console.log(data.toString()));
    spawedProcess.on('error', (data) => console.error(data.toString()));
  });

const startIpfs = async () => {
  const ipfsFileName = process.platform == 'win32' ? 'ipfs.exe' : 'ipfs';
  let ipfsPath = path.join(process.resourcesPath, 'bin', ipfsFileName);
  let ipfsDataPath = path.join(envPaths.data, 'ipfs');

  // test launching the ipfs binary in dev mode
  // they must be downloaded first using `yarn electron:build`
  if (isDev) {
    let binFolderName = 'win';
    if (process.platform === 'linux') {
      binFolderName = 'linux';
    }
    if (process.platform === 'darwin') {
      binFolderName = 'mac';
    }
    ipfsPath = path.join(dirname, '..', 'bin', binFolderName, ipfsFileName);
    ipfsDataPath = path.join(dirname, '..', '.plebbit', 'ipfs');
  }

  if (!fs.existsSync(ipfsPath)) {
    throw Error(`ipfs binary '${ipfsPath}' doesn't exist`);
  }

  console.log({ ipfsPath, ipfsDataPath });

  fs.ensureDirSync(ipfsDataPath);
  const env = { IPFS_PATH: ipfsDataPath };
  // init ipfs client on first launch
  try {
    await spawnAsync(ipfsPath, ['init'], { env, hideWindows: true });
  } catch (e) {}

  // make sure repo is migrated
  try {
    await spawnAsync(ipfsPath, ['repo', 'migrate'], { env, hideWindows: true });
  } catch (e) {}

  // dont use 8080 port because it's too common
  await spawnAsync(ipfsPath, ['config', '--json', 'Addresses.Gateway', '"/ip4/127.0.0.1/tcp/6473"'], {
    env,
    hideWindows: true,
  });

  // use different port with proxy for debugging during env
  let apiAddress = '/ip4/127.0.0.1/tcp/5001';
  if (isDev) {
    apiAddress = apiAddress.replace('5001', '5002');
    proxyServer.start({ proxyPort: 5001, targetPort: 5002 });
  }
  await spawnAsync(ipfsPath, ['config', 'Addresses.API', apiAddress], { env, hideWindows: true });

  await new Promise((resolve, reject) => {
    const ipfsProcess = spawn(ipfsPath, ['daemon', '--migrate', '--enable-pubsub-experiment', '--enable-namesys-pubsub'], { env, hideWindows: true });
    console.log(`ipfs daemon process started with pid ${ipfsProcess.pid}`);
    let lastError;
    ipfsProcess.stderr.on('data', (data) => {
      lastError = data.toString();
      console.error(data.toString());
    });
    ipfsProcess.stdin.on('data', (data) => console.log(data.toString()));
    ipfsProcess.stdout.on('data', (data) => console.log(data.toString()));
    ipfsProcess.on('error', (data) => console.error(data.toString()));
    ipfsProcess.on('exit', () => {
      console.error(`ipfs process with pid ${ipfsProcess.pid} exited`);
      reject(Error(lastError));
    });
    process.on('exit', () => {
      try {
        ps.kill(ipfsProcess.pid);
      } catch (e) {
        console.log(e);
      }
      try {
        // sometimes ipfs doesnt exit unless we kill pid +1
        ps.kill(ipfsProcess.pid + 1);
      } catch (e) {
        console.log(e);
      }
    });
  });
};

const DefaultExport = {};

let pendingStart = false;
const start = async () => {
  if (pendingStart) {
    return;
  }
  pendingStart = true;
  try {
    const started = await tcpPortUsed.check(5001, '127.0.0.1');
    if (started) {
      return;
    }
    await startIpfs();
  } catch (e) {
    console.log('failed starting ipfs', e);
    try {
      // try to run exported onError callback, can be undefined
      DefaultExport.onError(e)?.catch?.(console.log);
    } catch (e) {}
  }
  pendingStart = false;
};

// retry starting ipfs every 1 second,
// in case it was started by another client that shut down and shut down ipfs with it
start();
setInterval(() => {
  start();
}, 1000);

DefaultExport.start = start;
export default DefaultExport;