class Resque::Failure::Redis

def self.all(offset = 0, limit = 1, queue = nil)
  check_queue(queue)
  Resque.list_range(:failed, offset, limit)
end

def self.check_queue(queue)
  raise ArgumentError, "invalid queue: #{queue}" if queue && queue.to_s != "failed"
end

def self.clear(queue = nil)
  check_queue(queue)
  data_store.clear_failed_queue
end

def self.count(queue = nil, class_name = nil)
  check_queue(queue)
  if class_name
    n = 0
    each(0, count(queue), queue, class_name) { n += 1 }
    n
  else
    data_store.num_failed
  end
end

def self.data_store
  Resque.data_store
end

def self.each(offset = 0, limit = self.count, queue = :failed, class_name = nil, order = 'desc')
  if class_name
    original_limit = limit
    limit = count
  end
  all_items = limit == 1 ? [all(offset,limit,queue)] : Array(all(offset, limit, queue))
  reversed = false
  if order.eql? 'desc'
    all_items.reverse!
    reversed = true
  end
  all_items.each_with_index do |item, i|
    if !class_name || (item['payload'] && item['payload']['class'] == class_name && (original_limit -= 1) >= 0)
      if reversed
        id = (all_items.length - 1) + (offset - i)
      else
        id = offset + i
      end
      yield id, item
    end
  end
end

def self.queues
  data_store.failed_queue_names
end

def self.remove(id, queue = nil)
  check_queue(queue)
  data_store.remove_from_failed_queue(id, queue)
end

def self.remove_queue(queue)
  i = 0
  while job = all(i)
    if job['queue'] == queue
      # This will remove the failure from the array so do not increment the index.
      remove(i)
    else
      i += 1
    end
  end
end

def self.requeue(id, queue = nil)
  check_queue(queue)
  item = all(id)
  item['retried_at'] = Time.now.strftime("%Y/%m/%d %H:%M:%S")
  data_store.update_item_in_failed_queue(id,Resque.encode(item))
  Job.create(item['queue'], item['payload']['class'], *item['payload']['args'])
end

def self.requeue_all
  count.times do |num|
    requeue(num)
  end
end

def self.requeue_queue(queue)
  i = 0
  while job = all(i)
     requeue(i) if job['queue'] == queue
     i += 1
  end
end

def data_store
  Resque.data_store
end

def filter_backtrace(backtrace)
  index = backtrace.index { |item| item.include?('/lib/resque/job.rb') }
  backtrace.first(index.to_i)
end

def save
  data = {
    :failed_at => UTF8Util.clean(Time.now.strftime("%Y/%m/%d %H:%M:%S %Z")),
    :payload   => payload,
    :exception => exception.class.to_s,
    :error     => UTF8Util.clean(exception.to_s),
    :backtrace => filter_backtrace(Array(exception.backtrace)),
    :worker    => worker.to_s,
    :queue     => queue
  }
  data = Resque.encode(data)
  data_store.push_to_failed_queue(data)
end