import { getProsodyConfigContent, getProsodyConfigPath, getWorkingDir } from '../prosody/config'
import { newResult, TestResult } from './utils'
import * as fs from 'fs'

export async function diagProsody (test: string, options: RegisterServerOptions): Promise<TestResult> {
  const result = newResult(test)
  result.label = 'Builtin Prosody and ConverseJS'

  try {
    const dir = await getWorkingDir(options)
    result.messages.push('The working dir is: ' + dir)
  } catch (error) {
    result.messages.push('Error when requiring the working dir: ' + (error as string))
    return result
  }

  // Testing the prosody config file.
  try {
    const filePath = await getProsodyConfigPath(options)
    await fs.promises.access(filePath, fs.constants.R_OK) // throw an error if file does not exist.
    result.messages.push(`The prosody configuration file (${filePath}) exists`)
    const actualContent = await fs.promises.readFile(filePath, {
      encoding: 'utf-8'
    })
    const wantedContent = await getProsodyConfigContent(options)
    if (actualContent === wantedContent) {
      result.messages.push('Prosody configuration file content is correct.')
    } else {
      result.messages.push('Prosody configuration file content is not correct.')
      return result
    }
  } catch (error) {
    result.messages.push('Error when requiring the prosody config file: ' + (error as string))
    return result
  }

  result.ok = true
  return result
}