#! /usr/bin/env node

const program = require('commander')
const path = require('path')
const prompt = require('prompt-async')
const readline = require('readline')
const os = require('os')
const fs = require('fs')
const yaml = require('js-yaml')

const config = require('./config')

const {
  Seance,
} = require ('./seance')


// Set up Seance CLI notifications
const seance = new Seance()

seance.on('update', (e) => {
  console.log(e.message)
})

seance.on('notification', (e) => {
  console.warn(e.message)
})

seance.on('error', (e) => {
  console.error(e.message)
})

program
  .version('1.0.0-dev')
  .description('pull posts from Medium and add them to a Ghost blog');

program.command('setup')
  .description('Initial setup and configuration')
  .action(async () => {
    console.log('Hello and welcome to Seance.')
    console.log(
      '\n\nWe\'re going to take you through some steps' +
      ' to set up your system.\n'
    )

    var res
    prompt.start()

    console.log('First up: File uploads.')
    console.log(
      'Would you like to upload your files via WebDAV, or just ' +
      'copy them to a local folder on your filesystem? Type ' +
      '"webdav" or "local" to choose.\n'
    )

    res = await prompt.get([
      {
        name: 'upload_mode',
        default: 'webdav',
        pattern: /^(webdav|local)$/ig,
        message: 'Please enter "webdav" or "local"',
      },
    ])

    if (res.upload_mode == 'webdav') {

      console.log('You\'re going with WebDAV? Awesome!')
      console.log(
        'Please enter your server url (including the port), ' +
        'username, and password\n'
      )

      res = await prompt.get([
        { name: 'server_url', default: config.webdav.server_url || '' },
        { name: 'username', default: config.webdav.username || '' },
        { name: 'password', default: config.webdav.password || '' , hidden: true},
      ])
      config.webdav.server_url = res.server_url
      config.webdav.username = res.username
      config.webdav.password = res.password
      console.log(`\nOkay. So we have ${config.webdav.username} on ${config.webdav.server_url} with [ the password you set]`)

      console.log(
        '\nA couple more settings for your WebDAV: ' +
        'we need to know the path prefix and the uploaded path prefix.\n' +
        'The path prefix is the subfolder to which you upload, like ' +
        '`/seance-uploads`, while the uploaded path prefix is what '+
        'you\'d stick in front of the filename after uploading ' +
        '(like `https://media.mysite.com/seance-uploads`).\n'
      )
      res = await prompt.get([
        { name: 'path_prefix', default: config.webdav.path_prefix || '' },
        {
          name: 'uploaded_path_prefix',
          default: config.uploaded_path_prefix || config.webdav.uploaded_path_prefix || ''
        },
      ])
      config.webdav.path_prefix = res.path_prefix
      config.uploaded_path_prefix = res.uploaded_path_prefix
      console.log(`Cool. So uploads to ${config.webdav.path_prefix} will be visible at ${config.uploaded_path_prefix}.`)

    } else if (res.upload_mode == 'local') {
      console.log('You\'re saving files locally? Smart!')
      console.log(
        'Two settings we need to know to get things running ' +
        'smoothly: we need the local path/folder where you\'ll be ' +
        'uploading the files, and the uploaded path prefix.\n' +
        'The local path is the folder to which you upload, like ' +
        '`/var/www/seance-uploads`, while the uploaded path prefix ' +
        'is what you\'d stick in front of the filename after ' +
        'uploading (like `https://media.mysite.com/seance-uploads`).\n'
      )
      res = await prompt.get([
        { name: 'path_prefix', default: config.local_upload.path_prefix || '' },
        { name: 'uploaded_path_prefix', default: config.uploaded_path_prefix || '' },
      ])
      config.local_upload.path_prefix = res.path_prefix
      config.uploaded_path_prefix = res.uploaded_path_prefix
      console.log(`Cool. So uploads to ${config.local_upload.path_prefix} will be visible at ${config.uploaded_path_prefix}.`)
    }

    console.log('\n\nNext up: Ghost settings.')
    console.log(
      'The Ghost URL is basically the link to your main ' +
      'Ghost site, and the admin API key can be found by going to ' +
      'your Settings -> Integrations page.\n'
    )

    res = await prompt.get([
      { name: 'url', default: config.ghost.url || '' },
      { name: 'version', default: config.ghost.version || 'v2' },
      { name: 'admin_key', default: config.ghost.admin_key || '' },
    ])
    config.ghost.url = res.url
    config.ghost.version = res.version
    config.ghost.admin_key = res.admin_key
    console.log(`Right. So that's Ghost ${config.ghost.version} running at ${config.ghost.url} with key ${config.ghost.admin_key}`)

    console.log('\n\nNow, a bit about the server.')
    console.log(
      'This server usually runs on the main path (eg. example.com/).' +
      'If you want to host seance on a different subpath (eg. ' +
      'example.com/seance) then please enter that last part of the' +
      'string now (eg. /seance).'
    )
    res = await prompt.get([
      { name: 'base_path', default: config.basePath || '/' },
    ])
    if (res.base_path == '/') {
      console.log('Okay. Serving on the root path then :)')
    } else {
      config.basePath = res.base_path
      console.log(
        'Right, so we\'ll be serving at yoursite.com' +
        `${config.basePath} then :)`
      )
    }

    console.log(
      '\n\nA final thing. Do you have a "scissors" or other image ' +
      'used as a separator in your article? If so, enter the path ' +
      'here and we\'ll check against it to auto-convert them to ' +
      'Ghost-friendly separators. If you don\'t use scissors, you ' +
      'can just press Enter without typing anything.\n'
    )

    res = await prompt.get([
      { name: 'scissors', default: config.scissors || '' },
    ])
    config.scissors = res.scissors
    if (config.scissors) {
      console.log(`Done. Scissors set to ${config.scissors}`)
    } else {
      console.log('No scissors? That\'s fine. You\'ll get there one day :)')
    }

    console.log('\n\nFinal confirmation: would you like to save these settings?')
    const { save } = await prompt.get(['save'])
    if (save == '' || (save[0] && save[0].toLowerCase() != 'n')) {
      const configDir = path.join(os.homedir(), '.config')
      if (!fs.existsSync(configDir)) {
        os.makeDirSync(configDir)
      }
      userConfig = path.join(configDir, 'seance.yaml')
      data = yaml.safeDump(config)
      fs.writeFileSync(userConfig, data)
      console.log('\nThat\'s it - we\'re done!')
    } else {
      console.log('Not saving? What a pity!')
    }
  })

program.command('fetch-medium <post_url>')
  .alias('fetch')
  .description('fetch a Medium post')
  .action((post_url) => {
    new Seance().fetchFromMedium(post_url)
      .then((post) => {
        console.info(`"${post.title}" fetched successfully.`)
      })
  });

program.command('push-ghost <file>')
  .alias('push')
  .description('push a downloaded Medium post to Ghost')
  .option('-d, --dry-run', "full dry run: doesn't upload anything (same as --no-upload --no-push)")
  .option('--no-upload', "partial dry run: don't upload images")
  .option('--no-push', "partial dry run: don't push to ghost")
  .action((file, o) => {
    seance.pushToGhost(file, {
      dryRun: o.dryRun,
      noUpload: !o.upload,
      noPush: !o.push,
    })
  });

program.command('medium-to-ghost <mediumUrl>')
  .alias('import')
  .description('copy a Medium file over to Ghost')
  .action((mediumUrl) => {
    seance.pushToGhost(mediumUrl);
  });

program.command('create-user <username> <email>')
  .description('create ghost-import.json to import Medium user to Ghost')
  .action(async (username, email) => {
    const jsonOut = await seance.generateUserData(username, email)
      .catch((err) => {
        console.log(`Error: ${err.error}`)
        return
      })

    const userSlug = JSON.parse(jsonOut).data.users[0].slug
    const outFile = `user-${userSlug}.json`
    await fs.promises.writeFile(outFile, jsonOut, 'utf-8')
    console.log(`Saved to ${outFile}`);
  });

program.command('webdav-test <file>')
  .description('[test command] upload stuff to WebDAV')
  .action(async (file) => {
    // decide path
    current_date = new Date();
    var dir_path = path.join(
      config.webdav.path_prefix,
      current_date.getUTCFullYear().toString(),
      current_date.getUTCMonth().toString(),
      'test' // TODO: replace with article slug
    )
    new seance.uploadDav(dir_path, file);
  });

program.command('check-scissors <file>')
  .description('[test command] check if an image matches the set separator')
  .action(async (file) => {
    console.log(await seance.checkScissors(file))
  })

program.parse(process.argv)