// server
// app/connectionHandler.js
var path = require("path")
var fs = require("fs")
var extend = require("util")._extend

function handleConnection(req, res, urlParams) {
  urlParams = urlParams || {}

  // The path to the client directory of the webssh2 module.
  var clientPath = path.resolve(
    __dirname,
    "..",
    "node_modules",
    "webssh2_client",
    "client",
    "public"
  )

  // Combine URL parameters, query parameters, and form data
  var connectionParams = extend({}, urlParams)
  extend(connectionParams, req.query)
  extend(connectionParams, req.body || {})

  // Inject configuration
  var config = {
    socket: {
      url: req.protocol + "://" + req.get("host"),
      path: "/ssh/socket.io"
    },
    ssh: {
      host: urlParams.host || "",
      port: urlParams.port || 22
    },
    autoConnect: !!req.session.sshCredentials
  }

  // Read the client.htm file
  fs.readFile(
    path.join(clientPath, "client.htm"),
    "utf8",
    function (err, data) {
      if (err) {
        return res.status(500).send("Error loading client file")
      }

      // Replace relative paths with the correct path
      var modifiedHtml = data.replace(
        /(src|href)="(?!http|\/\/)/g,
        '$1="/ssh/assets/'
      )

      // Inject the configuration into the HTML
      modifiedHtml = modifiedHtml.replace(
        "window.webssh2Config = null;",
        "window.webssh2Config = " + JSON.stringify(config) + ";"
      )

      // Send the modified HTML
      res.send(modifiedHtml)
    }
  )
}

module.exports = handleConnection