// Re-export the features modules in this folder, which each add, remove, and admininster one AO feature (imported in project index.js)
// Also contains the Features menus to control these features in this directory
import chalk from 'chalk'
import inquirer from 'inquirer'
import fs from 'fs'
import { lsFolder } from '../files.js'
import { fileURLToPath } from 'url'
import path from 'path'
import { headerStyle, greenChalk } from '../styles.js'
import { spinner } from '../console.js'

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

const loadFeatures = async () => {

  let filenames = lsFolder(path.join(__dirname))
  let features = {}
  for(let i = 0; i < filenames.length; i++) {
    const filename = filenames[i]
    if(filename === 'index.js') continue
    const moduleShortname = filename.replace(/\.js$/, '')
    const path = './' + filename
    features[moduleShortname] = (await import(path)).default
  }
  return features
}

const features = await loadFeatures()
export default features

// Returns a colored capitalized status word
const styledStatus = (fullWord) => {
  const lookup = {
    unknown: ' ' + chalk.grey('Unknown') + '  ',
    off: '   ' + chalk.grey('Off') + '    ',
    installed: chalk.blue('Installed') + ' ',
    enabled: ' ' + greenChalk('Enabled') + '  ',
    running: ' ' + greenChalk('Running') + '  ',
    synced: '  ' + greenChalk('Synced') + '  ',
    error: '  ' + chalk.red('Error') + '   '
  }
  return lookup[fullWord.toLowerCase()] + '   '
} 

// Prints the Configure AO Features menu and executes the user's choice
let featuresChoices
export async function featuresMenu(previousMenuChoice = 0) {
  console.log(`\n${headerStyle('Configure AO Features')}`)
  const stopSpinner = spinner('Loading status...')
  let loadedFeatures = 0
  if(!featuresChoices) {
    featuresChoices = Object.entries(features).map(([featureKey, feature]) => {
      let featureName = featureKey
      if(feature.hasOwnProperty('name') && feature.name.length >= 1) {
        featureName = feature.name
      }
      const nameColumn = featureName.padEnd(17)
      const status = feature.status() || 'Unknown'
      if(status !== 'Unknown') {
        loadedFeatures++
      }
      const statusColumn = styledStatus(status)
      const descriptionColumn = feature.description || ''
      const choice = { name: nameColumn + statusColumn + descriptionColumn, value: featureKey, short: featureKey}
      return choice
    })
    featuresChoices.push(
      'Back to Main Menu'
    )
  } else {
    loadedFeatures = featuresChoices.filter(feature => {
    return typeof feature === 'object' && !feature.name.includes('Unknown')
    }).length
  }
  stopSpinner('Loaded status for ' + loadedFeatures + '/' + (featuresChoices.length - 1) + ' features.')
  let answer
  try {
    answer = await inquirer.prompt({
      name: 'features_menu',
      type: 'list',
      message: 'Please choose:',
      choices: featuresChoices,
      default: previousMenuChoice,
      pageSize: featuresChoices.length
    })
  } catch(error) {
    if (error === 'EVENT_INTERRUPTED') {
      console.log('\nESC')
      return false
    }
  }
  if(answer.features_menu === 'Back to Main Menu') {
    return false
  }
  const chosenFeature = features[answer.features_menu]
  const chosenFeatureName = (chosenFeature.hasOwnProperty('name') && chosenFeature.name.length >= 1) ? chosenFeature.name : answer.features_menu
  while(await oneFeatureMenu(chosenFeatureName, chosenFeature)) {}
  return answer.features_menu
}

// Prints the menu options for a specific feature.
// Each feature module can export functions for status, install, version, update and these will be listed in the menu based on context
// If the module also has a menu: field, these menu items will each be appended if the name is truthy when calculated
// Prints all the standard-named features plus features listed under 'menu'
export async function oneFeatureMenu(name, feature) {
  console.log(`\n${headerStyle(name)}`)
  if(feature.description && feature.description?.length >= 1) {
    console.log('\n' + feature.description + '\n')
  }
  const featureChoices = []
  const stopSpinner = spinner('Loading status...')
  const status = feature?.status() || false
  stopSpinner('Loaded ' + name + ' status: ' + (feature.status() || 'Unknown') + '\n')
  if(!status) {
    console.log("This AO feature module lacks a status() function, not sure which menu items to display.")
    return false
  }
  if(status === 'off') {
    if(feature.hasOwnProperty('install')) {
      featureChoices.push({ name: 'Install ' + name, value: 'install' })
      menuItemCount++
    }
  } else {
      if(feature.hasOwnProperty('update')) {
        featureChoices.push({ name: 'Update ' + name, value: 'update'})
      }
      if(feature.hasOwnProperty('uninstall')) {
        featureChoices.push({ name: 'Uninstall ' + name, value: 'uninstall'})
      }
  }
  if(feature.hasOwnProperty('menu')) {
    feature.menu.forEach(menuItem => {
      const menuItemName = typeof menuItem.name === 'function' ? menuItem.name() : menuItem.name
      if(!menuItemName) {
        return
      }
      const menuItemValue = typeof menuItem.value === 'function' ? menuItem.value() : menuItem.value
      // todo: uninstall option will go here also
      featureChoices.push({ name: menuItemName, value: menuItemValue })
    })
  }
  if(featureChoices.length < 1) {
    console.log("Nothing to do yet on this feature, please check back soon.")
    return false
  }
  featureChoices.push(
    'Back to Features'
  )
  let answer
  try {
    answer = await inquirer.prompt({
      name: 'feature_menu',
      type: 'list',
      message: 'Please choose:',
      choices: featureChoices
    })
  } catch(error) {
    if (error === 'EVENT_INTERRUPTED') {
      console.log('\nESC')
      return false
    }
  }
  if(answer.feature_menu === 'Back to Features') {
    return false
  }
  if(Object.keys(feature).includes(answer.feature_menu)) {
    await feature[answer.feature_menu]()
    return true
  }
  console.log('Not yet implemented')
  return true
}