root = File.join(File.dirname(__FILE__), "..")
$LOAD_PATH.push root unless $LOAD_PATH.include? root

require "sidekiq"
require "sidekiq/api"

require "fileutils"

require "core/devops-service"
require "core/devops-config"
require "core/devops-logger"
require "core/devops-db"
require "providers/provider_factory"
require "lib/knife/knife_factory"


# All options keys MUST be a symbol!!!
class Worker
  include Sidekiq::Worker

  attr_accessor :out

  module STATUS
    INIT = "init"
    RUNNING = "running"
    COMPLETED = "completed"
    FAILED = "failed"
    IN_QUEUE = "queued"
  end

  def self.start_async(worker_class, request, job_options)
    jid = worker_class.perform_async(job_options)
    Worker.set_status jid, Worker::STATUS::IN_QUEUE
    DevopsLogger.logger.info "Job '#{jid}' has been queued"

    uri = URI.parse(request.url)
    uri.path = "#{DevopsConfig[:url_prefix]}/v2.0/report/#{jid}"
    uri.to_s
  end

  def self.start_sync(worker_class, request, job_options, out)
    stringified_options = job_options
=begin
    job_options.each do |key, value|
      stringified_options[key.to_s] = value
    end
=end
    w = worker_class.new
    w.out = out
    w.perform(stringified_options)
  end

  def self.set_status id, status
    Sidekiq.redis {|con| con.hset "devops", id, status}
  end

  def call provider_name, &block
    begin
      initialize_devops(provider_name)
      provider = ::Provider::ProviderFactory.get(provider_name) if provider_name
      if jid
        call_async(provider, &block)
      else
        call_sync(provider, &block)
      end
    rescue StandardError => e
      puts e.message
      puts e.backtrace.join("\n")
      DevopsLogger.logger.error e.message
    end
  end

  private

  def initialize_devops(provider_name)
    DevopsLogger.logger = logger
    DevopsConfig.read
    DevopsService.init
    ::Provider::ProviderFactory.init(DevopsConfig.config)
  end

  # outputs to file
  def call_async(provider)
    dir = DevopsConfig[:report_dir_v2]
    # directory is created on server start in config.ru
    file = File.join(dir, jid)

    update_job_status(STATUS::INIT)
    File.open(file, "w") do |out|
      begin
        update_job_status(STATUS::RUNNING)
        self.out = out

        job_result = yield(provider, out, file)
        canonical_status = (job_result == 0 ? STATUS::COMPLETED : STATUS::FAILED)
        update_job_status(canonical_status)
      rescue StandardError, RecordNotFound => e
        out << "\n #{e.class}\n #{e.message}\n"
        out << e.backtrace.join("\n")
        update_job_status(STATUS::FAILED)
      end
    end
  end

  # outputs to STDOUT
  def call_sync(provider)
    out = STDOUT
    begin
      yield(provider, out, '')
    rescue StandardError, RecordNotFound => e
      out << "\n"
      out << e.message
      out << "\n"
      out << e.backtrace.join("\n")
    end
  end

  def mongo
    ::Devops::Db.connector
  end

  def update_job_status(status)
    set_status(jid, status)
    mongo.set_report_status(jid, status)
    status
  end

  def init_provider(provider_name)
    ::Provider::ProviderFactory.init(DevopsConfig.config)
    ::Provider::ProviderFactory.get(provider_name) if provider_name
  end

  def convert_config conf
    config = {}
    conf.each {|k,v| config[k.is_a?(String) ? k.to_sym : k] = v}
    DevopsLogger.logger.info "Converted options: #{config.inspect}"
    config
  end

  def set_status id, status
    self.class.set_status(id, status)
  end

end