require 'bundler/setup'
require 'rubygems'
require 'sequel'
require 'jdbc/dss'
require 'logger'
require 'pathname'
require 'date'
require 'json'
require 'peach'
require 'zlib'

Jdbc::DSS.load_driver
Java.com.gooddata.dss.jdbc.driver.DssDriver

@ads_instance = 'e754dad464ce3602dd44230afb57cb85'

@logger = Logger.new($stdout)

files_to_load = {
    "sessions" => [],
    "custom_events" => [],
    "device_events" => [],
    "notifications" => [],
    "impressions"=>[]
}

dir_content =  Dir.glob('mobile_events_v1/**/*').reject {|fn| File.directory?(fn) }

dir_content.each do |f|
  @logger.info "Procesing and ungzipping #{f}"
  new_name = f.gsub('.gz','.json')
  system("gzip -c -d #{f} > #{new_name}")

  #File.open(f.gsub('.gz','.json'),'w').write(Zlib::GzipReader.open(f).read)
  file_name = File.basename(f)
  entity = f.split('/')[1]
  files_to_load[entity] << {
      "file_name" => file_name,
      "file_path" => new_name,
      "file_size_origin" => File.size(f),
      "file_size" => File.size(new_name),
      "copy_cmd" => "COPY mobile_events_#{entity}  FROM LOCAL '#{new_name}' PARSER fjsonparser();"
  }
end

def refresh_connection(entity)
  @logger.info "Refresh ##{entity}"
  Sequel.connect('jdbc:dss://na1.analytics.sailthru.com/gdc/dss/instances/' + @ads_instance, :username => 'ps-etl+sailthru@gooddata.com',
                 :password => '',
                 :pool_timeout => 240,
                 :max_connections => 4)
end


@logger.info "SUMMARY"
files_to_load.keys.each do |k|
  @logger.info "ENTITY #{k} contain #{files_to_load[k].length} files"
end

connection = Sequel.connect('jdbc:dss://na1.analytics.sailthru.com/gdc/dss/instances/' + @ads_instance,
                            :username => 'ps-etl+sailthru@gooddata.com',
                            :password => '',
                            :pool_timeout => 240,
                            :max_connections => 4)

queue = Queue.new
threads = []
files_to_load.keys.each {|x| queue << x}
queue.size.times do
  threads << Thread.new do
    entity = queue.pop(true) rescue nil
    files_to_load[entity].each_with_index do |file, index|
      index = index + 1
      if index % 80 == 0
        connection = refresh_connection(entity)
      end
      file_name = file['file_name']
      file_size = file['file_size']
      file_size_origin = file['file_size_origin']
      sql_stmnt = file['copy_cmd']
      file_path = file['file_path']
      @logger.info "#{Thread.current.object_id} || Executing #{sql_stmnt}. #{index}/#{files_to_load[entity].length}"
      connection.execute sql_stmnt
      connection.execute "insert INTO mobile_events_metadata (entity, file_name, file_size, row_count, inserted_at, file_size_origin)
              values ('#{entity}', '#{file_name}',#{file_size},#{`wc -l "#{file_path}" `.strip.split(' ')[0].to_i}, '#{Time.now()}', #{file_size_origin})"
    end
  end
end

threads.each {|t| t.join}

files_to_load.keys.each do |entity|
  row_count = connection.fetch("SELECT count(*) from mobile_events_#{entity}").all[0][:count]
  if row_count > 0
    sql_stm = "SELECT compute_flextable_keys_and_build_view('mobile_events_#{entity}')"
    @logger.info sql_stm
    connection.fetch(sql_stm).all
  end
end



#Preparing payloads for mobile notifications

#get all payload columns

sql_stmnt = "SELECT key_name AS key_name FROM mobile_events_notifications_keys WHERE REGEXP_LIKE(key_name, 'payload.')"

payload_columns_raw = connection.fetch(sql_stmnt).all
payload_columns = []
payload_columns_raw.each {|c| payload_columns << c[:key_name]}

payload_columns.each do |pc|
  #sql_stmnt = "INSERT /*+direct*/ INTO src_json_mobile_events_notifications(type, client_id, app_id, notification_id, message_id, platform, payload, payload_value, date, status)
  #              Select type, client_id, app_id, notification_id, message_id, platform, '#{pc.gsub('payload.', '')}', \"#{pc}\"::VARCHAR(10000), date, status from mobile_events_notifications_view
  #              group by type, client_id, app_id, notification_id, message_id, platform,'#{pc.gsub('payload.', '')}', \"#{pc}\", date, status;";
  sql_stmnt = "INSERT /*+direct*/ INTO src_json_mobile_events_notifications (user_id, type, token, status, sid, platform, notification_id, message_id, device_id, date, client_id, app_id, payload, payload_value)
                  SELECT user_id, type, token, status, sid, platform, notification_id, message_id, device_id, date, client_id, app_id, '#{pc.gsub('payload. ', '')}', \"#{pc}\":: VARCHAR (10000) FROM mobile_events_notifications_view
                  GROUP BY user_id, type, token, status, sid, platform, notification_id, message_id, device_id, date, client_id, app_id, '#{pc.gsub('payload.', '')}', \"#{pc}\";"
  @logger.info sql_stmnt
  connection.execute(sql_stmnt)
end

@logger.info "Job's done."