#!/usr/bin/env node

'use strict'

var chalk = require('chalk')
var wreck = require('wreck')
var argv = process.argv.slice(2)
var pgp = require('pg-promise')()
var inquirer = require('inquirer')
var R = require('ramda')
var psqlUrl = require('../lib/options').postgresql

var cmd = argv[0]

if (!cmd) bail()

function bail (error) {
  error = error || 'Command line utility for lamassu-server'
  console.log(chalk.bold(error))
  console.log('\nssu reboot <machine-id>')
  console.log('This will remotely reboot your lamassu-machine.')
  console.log('\nssu crypto <code> <ticker-plugin> <wallet-plugin> [<trader-plugin>]')
  console.log('This will configure a new cryptocurrency.')
  console.log('\nssu crypto <code> [on|off]')
  console.log('This will activate or deactivate a cryptocurrency.')
  console.log('\nssu config <plugin> <key>')
  console.log('Configure a plugin setting.')
  console.log('\nssu notify [email] [sms]')
  console.log('Set notification plugin types.')
  console.log('\nssu set <plugin type> <plugin>')
  console.log('Set current plugin for plugin type.')
  process.exit(1)
}

switch (cmd) {
  case 'reboot':
    reboot()
    break
  case 'crypto':
    crypto()
    break
  case 'config':
    configure()
    break
  case 'notify':
    notify()
    break
  case 'set':
    setPlugin()
    break
  default:
    bail('No such command: ' + cmd)
    break
}

function reboot () {
  var deviceId = argv[1]

  if (!deviceId) {
    console.log('Machine ID required')
    process.exit(1)
  }

  var opts = {json: true}
  wreck.get('http://localhost:7070/pid?device_id=' + deviceId, opts, function (err, res, payload) {
    if (err) {
      console.log('Please make sure that lamassu-server is running on this box.')
      process.exit(2)
    }

    if (!payload || !payload.pid) {
      console.log('The requested lamassu-machine appears to be running an old version.')
      process.exit(3)
    }

    var pid = payload.pid

    if (Date.now() - payload.ts > 10000) {
      console.log('lamassu-machine is not connected to server.')
      process.exit(6)
    }

    var opts2 = {
      headers: {'Content-Type': 'application/json'},
      payload: JSON.stringify({pid: pid, deviceId: deviceId})
    }

    wreck.post('http://localhost:7070/reboot', opts2, function (err2, res) {
      if (err2) {
        console.log('Please make sure that lamassu-server is running on this box.')
        process.exit(2)
      }

      if (res.statusCode !== 200) {
        console.log('Communication error')
        return
      }

      console.log('Rebooting...')

      var ts = null

      setTimeout(function () {
        if (Date.now() - ts < 10000) {
          console.log('lamassu-machine did not reboot but is still contacting server.')
          process.exit(4)
        }

        console.log('lamassu-machine rebooted but is not coming back up.')
        process.exit(5)
      }, 30000)

      setInterval(function () {
        wreck.get('http://localhost:7070/pid?device_id=' + deviceId, opts, function (err3, res, payload) {
          if (err3) {
            console.log('lamassu-server appears to be down.')
            process.exit(2)
          }

          ts = payload.ts

          if (payload.pid !== pid) {
            console.log('lamassu-machine is back up!')
            process.exit(0)
          }
        })
      }, 5000)
    })
  })
}

function cryptoActivate (code, on) {
  var db = pgp(psqlUrl)

  return db.one('select data from user_config where type=$1', 'exchanges')
  .then(function (data) {
    var config = data.data
    if (on) {
      if (R.contains(code, config.exchanges.settings.coins)) {
        console.log('success [no changes]')
        process.exit(0)
      }
      config.exchanges.settings.coins = R.append(code, config.exchanges.settings.coins)
    } else {
      config.exchanges.settings.coins = R.without([code], config.exchanges.settings.coins)
    }
    db.none('update user_config set data=$1 where type=$2', [config, 'exchanges'])
    db.none('notify "config_update"')
  })
  .then(function () {
    console.log('success')
    pgp.end()
  })
  .catch(function (err) {
    console.log(err.stack)
    pgp.end()
  })
}

function crypto () {
  var code = argv[1]
  var tickerPlugin = argv[2]
  var walletPlugin = argv[3]
  var traderPlugin = argv[4]

  if (code && tickerPlugin === 'on') return cryptoActivate(code, true)
  if (code && tickerPlugin === 'off') return cryptoActivate(code, false)

  if (!code || !tickerPlugin || !walletPlugin) {
    console.log('\nssu crypto <code> <ticker-plugin> <wallet-plugin> [<trader-plugin>]')
    console.log('This will configure a new cryptocurrency.')
    process.exit(1)
  }

  code = code.toUpperCase()

  var db = pgp(psqlUrl)

  return db.one('select data from user_config where type=$1', 'exchanges')
  .then(function (data) {
    var config = data.data
    config.exchanges.plugins.current[code] = {
      ticker: tickerPlugin,
      transfer: walletPlugin,
      trader: traderPlugin
    }
    config.exchanges.settings.coins = R.union(config.exchanges.settings.coins, [code])
    db.none('update user_config set data=$1 where type=$2', [config, 'exchanges'])
    db.none('notify "config_update"')
  })
  .then(function () {
    console.log('success')
    pgp.end()
  })
  .catch(function (err) {
    console.log(err.stack)
    pgp.end()
  })
}

function connect () {
  return pgp(psqlUrl)
}

function loadConfig (db) {
  return db.one('select data from user_config where type=$1', 'exchanges')
  .then(function (data) {
    return data.data
  })
}

function updateConfig (db, config) {
  db.none('update user_config set data=$1 where type=$2', [config, 'exchanges'])
  db.none('notify "config_update"')
}

function modifyConfig (config, plugin, keys, result) {
  keys.forEach(function (key) {
    var value = result[key]
    config.exchanges.plugins.settings[plugin] = config.exchanges.plugins.settings[plugin] || {}
    config.exchanges.plugins.settings[plugin][key] = value
  })
  return config
}

function configure () {
  var plugin = argv[1]
  var keys = argv.slice(2)

  if (!plugin || keys.length === 0) {
    console.log('\nssu config <plugin> <key> [<key> ...]')
    console.log('Configure a plugin setting.')
    process.exit(1)
  }

  var questions = keys.map(function (key) {
    return {
      type: 'input',
      name: key,
      message: 'Enter value for ' + key + ':',
      validate: function (val) {
        return !val || val.length === 0
        ? 'Please enter a value for ' + key
        : true
      }
    }
  })
  inquirer.prompt(questions).then(function (result) {
    var db = connect()
    return loadConfig(db)
    .then(function (config) {
      var _config = modifyConfig(config, plugin, keys, result)
      return updateConfig(db, _config)
    })
    .then(function () {
      console.log('success')
      pgp.end()
    })
    .catch(function (err) {
      console.log(err.stack)
      pgp.end()
    })
  })
}

function notify () {
  var plugins = argv.slice(1)
  var db = connect()
  return loadConfig(db)
  .then(function (config) {
    config.exchanges.plugins.current.notify = plugins
    return updateConfig(db, config)
  })
  .then(function () {
    console.log('success')
    pgp.end()
  })
  .catch(function (err) {
    console.log(err.stack)
    pgp.end()
  })
}

function setPlugin () {
  var pluginType = argv[1]
  var plugin = argv[2]

  var db = connect()
  return loadConfig(db)
  .then(function (config) {
    if (!plugin) {
      var _plugin = config.exchanges.plugins.current[pluginType]
      _plugin
      ? console.log('Current plugin for %s: %s', pluginType, _plugin)
      : console.log('No plugin set for %s', pluginType)
      process.exit(0)
    }
    config.exchanges.plugins.current[pluginType] = plugin
    return updateConfig(db, config)
  })
  .then(function () {
    console.log('success')
    pgp.end()
  })
  .catch(function (err) {
    console.log(err.stack)
    pgp.end()
  })
}