DEPLOY_PATH = {
  :staging => 'app-name',
  :production => 'app-name',
  :uat     => 'app-name-uat'
}

SERVICES      = %w(app-name)
ENVIRONMENTS  = [:staging, :uat] #这是测试环境的配置，对于产品环境可以改成[:production]
TIMEOUT       = 30.seconds
LONG_TIMEOUT  = 60.seconds
STOP_PAUSE    = 10.seconds
CHAIN_PAUSE   = 05.seconds

# 默认参数设置，默认使用dotenv
def default_options
  {
    dotenv: true,
  }
end

def service_name(app)
  app.gsub('-', '_')
end

# 集成.env的环境变量配置
def load_env(environment = :staging )
  File.open("/opt/#{DEPLOY_PATH[environment]}/.env", 'rb').each_line do |line|
    result = line.split('=')
    #设置全局性的环境变量
    env result[0] => result[1].chop if result.length > 1
  end

  # unicorn requires to be `ruby` in path (for soft restart)
  env "PATH" => "/usr/local/bin/ruby:#{ENV['PATH']}"
end

def define_application(app, env, options = default_options)
  app_name = "#{app}#{'-uat' if env==:uat}"
  Eye.application app_name do
    load_env(env) if options[:dotenv]

    env('RAILS_ENV' => env.to_s) if options[:env]

    group "#{app_name}-web" do
      chain :grace => CHAIN_PAUSE

      process "#{app_name}-web-1" do
        working_dir   "/opt/#{DEPLOY_PATH[env]}/#{service_name(app)}/current"
        pid_file      "/opt/#{DEPLOY_PATH[env]}/#{service_name(app)}/tmp/pids/unicorn.pid"

        start_command "bundle exec unicorn -E #{env} -Dc ./config/unicorn.rb"
        # 对于unicorn使用-D参数设置deamon
        stop_signals [:QUIT, STOP_PAUSE, :TERM, STOP_PAUSE, :KILL]

        # 没有downtime重启unicorn，产生新的master和worker后，自动杀掉老的master
        restart_command "kill -USR2 {PID}"

        start_timeout LONG_TIMEOUT
        restart_grace LONG_TIMEOUT
        stop_timeout  TIMEOUT

        monitor_children do
          stop_command "kill -QUIT {PID}"
        end
      end
    end

    group "#{app_name}-worker" do
      chain :grace => CHAIN_PAUSE

      process "#{app_name}-worker-1" do
        working_dir "/opt/#{DEPLOY_PATH[env]}/#{service_name(app)}/current"
        pid_file    "/opt/#{DEPLOY_PATH[env]}/#{service_name(app)}/tmp/pids/sidekiq.pid"

        daemonize true

        start_command "bundle exec sidekiq -e #{env}"
        stop_signals  [:QUIT, STOP_PAUSE, :TERM, STOP_PAUSE, :KILL]

        start_timeout   TIMEOUT
        restart_timeout TIMEOUT
        stop_timeout    TIMEOUT

        monitor_children do
          stop_command "kill -QUIT {PID}"
        end
      end
    end
  end
end

Eye.config do
  logger "/tmp/eye.log"
end

SERVICES.each do |service|
  ENVIRONMENTS.each do |environment|
    define_application(service, environment)
  end
end