#!/usr/bin/env node
import WebSocket from '../src/websocket'
import * as servicesList from '../src/serviceList'
import { WS } from '../types/index'
import { getDomain } from '../src/utils'
import Axios from 'axios'
import * as fs from 'fs-extra'
import * as path from 'path'

(async () => {
  const program = require('commander')
  
  program
  .usage('-s <shared folder>')
  .description('Provide a two-way connection between the local computer and Remix IDE')
  .option('--remix-ide  <url>', 'URL of remix instance allowed to connect to this web sockect connection')
  .option('-s, --shared-folder <path>', 'Folder to share with Remix IDE')
  .option('--read-only', 'Treat shared folder as read-only (experimental)')
  .on('--help', function(){
    console.log('\nExample:\n\n    remixd -s ./ --remix-ide http://localhost:8080')
  }).parse(process.argv)

  const killCallBack: Array<Function> = []

  if (!program.remixIde) {
    console.log('\x1b[31m%s\x1b[0m', '[ERR] URL Remix IDE instance has to be provided.')
  }
  const isValid = await isValidOrigin(program.remixIde)

  if (!isValid) {
    console.log('\x1b[33m%s\x1b[0m', '[WARN] You are using IDE from an unsupported origin.')
    console.log('\x1b[33m%s\x1b[0m', 'Check https://gist.github.com/EthereumRemix/091ccc57986452bbb33f57abfb13d173 for list of all supported origins.\n')
  }
  console.log('\x1b[33m%s\x1b[0m', '[WARN] You may now only use IDE at ' + program.remixIde + ' to connect to that instance')

  if (program.sharedFolder) {
    console.log('\x1b[33m%s\x1b[0m', '[WARN] Any application that runs on your computer can potentially read from and write to all files in the directory.')
    console.log('\x1b[33m%s\x1b[0m', '[WARN] Symbolic links are not forwarded to Remix IDE\n')
    try {
      const sharedFolderClient = new servicesList['sharedfolder']()
      const websocketHandler = new WebSocket(65520, { remixIdeUrl: program.remixIde }, sharedFolderClient)

      websocketHandler.start((ws: WS) => {
        sharedFolderClient.setWebSocket(ws)
        sharedFolderClient.setupNotifications(program.sharedFolder)
        sharedFolderClient.sharedFolder(program.sharedFolder, program.readOnly || false)
      })
      killCallBack.push(websocketHandler.close.bind(websocketHandler))
    } catch(error) {
      throw new Error(error)
    }
  }

  // kill
  function kill () {
    for (const k in killCallBack) {
      try {
        killCallBack[k]()
      } catch (e) {
        console.log(e)
      }
    }
  }
  
  process.on('SIGINT', kill) // catch ctrl-c
  process.on('SIGTERM', kill) // catch kill
  process.on('exit', kill)

  async function isValidOrigin (origin: string): Promise<any> {
    const domain = getDomain(origin)
  
    if (!domain) return
    try {
      const { data } = await Axios.get('https://gist.githubusercontent.com/EthereumRemix/091ccc57986452bbb33f57abfb13d173/raw/3367e019335746b73288e3710af2922d4c8ef5a3/origins.json') as { data: string[] }
  
      try {
        await fs.writeJSON(path.resolve(__dirname + '/origins.json'), { data })
      } catch (e) {
        console.error(e)
      }
  
      return data.includes(origin) ? data.includes(origin) : data.includes(domain)
    } catch (e) {
      try {
        const origins = require('./origins.json')
        const { data } = origins
        
        return data.includes(origin) ? data.includes(origin) : data.includes(domain)
      } catch (e) {
        return false
      }
    }
  }
})()