#!/usr/bin/env ruby

require 'rubygems'
require 'commander'
require 'pp'
require 'vmfloaty/auth'
require 'vmfloaty/pooler'
require 'vmfloaty/version'
require 'vmfloaty/conf'
require 'vmfloaty/format'

class Vmfloaty
  include Commander::Methods

  def run
    program :version, Version.get
    program :description, 'A CLI helper tool for Puppet Labs vmpooler to help you stay afloat'

    config = Conf.read_config

    command :get do |c|
      c.syntax = 'floaty get os_type1=x ox_type2=y ...'
      c.summary = 'Gets a vm or vms based on the os flag'
      c.description = ''
      c.example 'Gets 3 vms', 'floaty get centos=3 debian=1 --user brian --url http://vmpooler.example.com'
      c.option '--verbose', 'Enables verbose output'
      c.option '--user STRING', String, 'User to authenticate with'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.option '--token STRING', String, 'Token for vmpooler'
      c.option '--notoken', 'Makes a request without a token'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        token = options.token || config['token']
        user = options.user ||= config['user']
        url = options.url ||= config['url']

        if args.empty?
          STDERR.puts "You did not provide any vms to grab"
        end

        os_types = {}
        args.each do |arg|
          os_arr = arg.split("=")
          if os_arr.size == 1
            # assume they didn't specify an = sign if split returns 1 size
            os_types[os_arr[0]] = 1
          else
            os_types[os_arr[0]] = os_arr[1].to_i
          end
        end

        no_token = options.notoken

        if no_token
          response = Pooler.retrieve(verbose, os_types, nil, url)
          puts response
          return
        end

        unless token
          pass = password "Enter your password please:", '*'
          token = Auth.get_token(verbose, url, user, pass)
        end

        unless os_types.nil?
          response = Pooler.retrieve(verbose, os_types, token, url)
          puts Format.get_hosts(response)
        else
          puts 'You did not provide an OS to get'
        end
      end
    end

    command :list do |c|
      c.syntax = 'floaty list [hostname]'
      c.summary = 'Shows a list of available vms from the pooler'
      c.description = ''
      c.example 'Filter the list on centos', 'floaty list centos --url http://vmpooler.example.com'
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        filter = args[0]
        url = options.url ||= config['url']

        os_list = Pooler.list(verbose, url, filter)
        puts os_list
      end
    end

    command :query do |c|
      c.syntax = 'floaty query [options]'
      c.summary = 'Get information about a given vm'
      c.description = ''
      c.example 'Get information about a sample host', 'floaty query hostname --url http://vmpooler.example.com'
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        url = options.url ||= config['url']
        hostname = args[0]

        query_req = Pooler.query(verbose, url, hostname)
        pp query_req
      end
    end

    command :modify do |c|
      c.syntax = 'floaty modify [hostname]'
      c.summary = 'Modify a vms tags and TTL'
      c.description = ''
      c.example 'Modifies myhost1 to have a TTL of 12 hours and adds a custom tag', 'floaty modify myhost1 --lifetime 12 --url https://myurl --token mytokenstring --tags \'{"tag":"myvalue"}\''
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.option '--token STRING', String, 'Token for vmpooler'
      c.option '--lifetime INT', Integer, 'VM TTL (Integer, in hours)'
      c.option '--tags STRING', String, 'free-form VM tagging (json)'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        url = options.url ||= config['url']
        hostname = args[0]
        lifetime = options.lifetime
        tags = JSON.parse(options.tags) if options.tags
        token = options.token || config['token']

        modify_req = Pooler.modify(verbose, url, hostname, token, lifetime, tags)
        if modify_req["ok"]
          puts "Successfully modified vm #{hostname}."
        else
          STDERR.puts "Something went wrong with your request"
          puts modify_req
          exit 1
        end
      end
    end

    command :delete do |c|
      c.syntax = 'floaty delete [hostname,...]'
      c.summary = 'Schedules the deletion of a host or hosts'
      c.description = ''
      c.example 'Schedules the deletion of a host or hosts', 'floaty delete myhost1,myhost2 --url http://vmpooler.example.com'
      c.option '--verbose', 'Enables verbose output'
      c.option '--token STRING', String, 'Token for vmpooler'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        hosts = args[0]
        token = options.token || config['token']
        url = options.url ||= config['url']

        Pooler.delete(verbose, url, hosts, token)
      end
    end

    command :snapshot do |c|
      c.syntax = 'floaty snapshot [options]'
      c.summary = 'Takes a snapshot of a given vm'
      c.description = ''
      c.example 'Takes a snapshot for a given host', 'floaty snapshot myvm.example.com --url http://vmpooler.example.com --token a9znth9dn01t416hrguu56ze37t790bl'
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.option '--token STRING', String, 'Token for vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        url = options.url ||= config['url']
        hostname = args[0]
        token = options.token ||= config['token']

        snapshot_req = Pooler.snapshot(verbose, url, hostname, token)
        pp snapshot_req
      end
    end

    command :revert do |c|
      c.syntax = 'floaty revert [options]'
      c.summary = 'Reverts a vm to a specified snapshot'
      c.description = ''
      c.example 'Reverts to a snapshot for a given host', 'floaty revert myvm.example.com --url http://vmpooler.example.com --token a9znth9dn01t416hrguu56ze37t790bl --snapshot n4eb4kdtp7rwv4x158366vd9jhac8btq'
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.option '--token STRING', String, 'Token for vmpooler'
      c.option '--snapshot STRING', String, 'SHA of snapshot'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        url = options.url ||= config['url']
        hostname = args[0]
        token = options.token || config['token']
        snapshot_sha = options.snapshot

        revert_req = Pooler.revert(verbose, url, hostname, token, snapshot_sha)
        pp revert_req
      end
    end

    command :status do |c|
      c.syntax = 'floaty status [options]'
      c.summary = 'Prints the status of vmpooler'
      c.description = ''
      c.example 'Gets the current vmpooler status', 'floaty status --url http://vmpooler.example.com'
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        url = options.url ||= config['url']

        status = Pooler.status(verbose, url)
        pp status
      end
    end

    command :summary do |c|
      c.syntax = 'floaty summary [options]'
      c.summary = 'Prints the summary of vmpooler'
      c.description = ''
      c.example 'Gets the current day summary of vmpooler', 'floaty summary --url http://vmpooler.example.com'
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        url = options.url ||= config['url']

        summary = Pooler.summary(verbose, url)
        pp summary
      end
    end

    command :token do |c|
      c.syntax = 'floaty token [get | delete | status]'
      c.summary = 'Retrieves or deletes a token'
      c.description = ''
      c.example '', ''
      c.option '--verbose', 'Enables verbose output'
      c.option '--url STRING', String, 'URL of vmpooler'
      c.option '--user STRING', String, 'User to authenticate with'
      c.option '--token STRING', String, 'Token for vmpooler'
      c.action do |args, options|
        verbose = options.verbose || config['verbose']
        action = args.first
        url = options.url ||= config['url']
        token = options.token ||= config['token']
        user = options.user ||= config['user']
        pass = password "Enter your password please:", '*'

        case action
        when "get"
          puts Auth.get_token(verbose, url, user, pass)
        when "delete"
          Auth.delete_token(verbose, url, user, pass, token)
        when "status"
          Auth.token_status(verbose, url, user, pass, token)
        when nil
          STDERR.puts "No action provided"
        else
          STDERR.puts "Unknown action: #{action}"
        end
      end
    end

    run!
  end
end