require "mini_scheduler/engine"
require 'mini_scheduler/schedule'
require 'mini_scheduler/schedule_info'
require 'mini_scheduler/manager'
require 'mini_scheduler/distributed_mutex'
require 'sidekiq/exception_handler'

module MiniScheduler

  def self.configure
    yield self
  end

  class SidekiqExceptionHandler
    extend Sidekiq::ExceptionHandler
  end

  def self.job_exception_handler(&blk)
    @job_exception_handler = blk if blk
    @job_exception_handler
  end

  def self.handle_job_exception(ex, context = {})
    if job_exception_handler
      job_exception_handler.call(ex, context)
    else
      SidekiqExceptionHandler.handle_exception(ex, context)
    end
  end

  def self.redis=(r)
    @redis = r
  end

  def self.redis
    @redis
  end

  def self.job_ran(&blk)
    @job_ran = blk if blk
    @job_ran
  end

  def self.before_sidekiq_web_request(&blk)
    @before_sidekiq_web_request = blk if blk
    @before_sidekiq_web_request
  end

  def self.skip_schedule(&blk)
    @skip_schedule = blk if blk
    @skip_schedule
  end

  def self.start
    manager = Manager.new

    Manager.discover_schedules.each do |schedule|
      manager.ensure_schedule!(schedule)
    end

    Thread.new do
      while true
        begin
          if !self.skip_schedule || !self.skip_schedule.call
            manager.tick
          end
        rescue => e
          # the show must go on
          handle_job_exception(e, message: "While ticking scheduling manager")
        end

        sleep 1
      end
    end
  end
end