# BACKGROUND:
# To describe the idea here -- these are capistrano "recipes" which are a bit like rake tasks
# You wrap all the fiddly systems scripts and things that you need to do for a deploy into these nice neat little individual tasks
# and then you can chain the tasks together
#
# when you run "cap deploy:migrate" let's say, all the things you've told to run before or after it go automatically
# eg this line in deploy/production.rb:
#    before "deploy:migrate", "production_only:backup_db"
# says, if I run "cap deploy:migrate production" then before doing any of the actual work of the deploy,
# run the task called "production_only:backup_db" which is defined in deploy.rb
#
# namespace :production_only do
#   # Back up the production database
#   task :backup_db, roles: :db do
#     run "/static/bin/backup_database.sh &"
#   end
# end
#
# which says, run this script backup_database.sh
# and run it on the machine that has the ":db" role
#
# The roles are defined in each of deploy/production.rb and deploy/staging.rb,
# and can be set differently for whichever system you are deploying to.
#
# Several tasks run automatically based on behind-the-scenes magic
#
require "./config/boot"
require "active_support/core_ext/hash/keys"

# takes care of the bundle install tasks
require 'bundler/capistrano'

# deploy to different environments with tags
require 'capistrano/ext/multistage'
set :stages, %w[staging production]
set :default_stage, "staging"
#require 'capistrano/gitflow_version'

# use rvm
require "rvm/capistrano"
set :rvm_ruby_string, ENV['GEM_HOME'].gsub(/.*\//, "")
set :rvm_type, :user

# user settings
set :user, "ao3app"
set :auth_methods, "publickey"
#ssh_options[:verbose] = :debug
ssh_options[:auth_methods] = %w(publickey)
set :use_sudo, false
default_run_options[:shell] = '/bin/bash'

# basic settings
set :application, "otwarchive"
set :deploy_to, "/home/ao3app/app"
set :keep_releases, 4

set :mail_to, "otw-coders@transformativeworks.org otw-testers@transformativeworks.org"

# git settings
set :scm, :git
set :repository, "https://github.com/otwcode/otwarchive.git"
set :deploy_via, :remote_cache

set :servers, -> { YAML.load_file(File.join(__dir__, "servers.yml")).deep_symbolize_keys[fetch(:stage)] }

# overwrite default capistrano deploy tasks
namespace :deploy do
  desc "Restart the unicorns"
  task :restart  do
    find_servers(roles: [:app, :web]).each do |server|
      puts "restart on #{server.host}"
      run "cd ~/app/current ; bundle exec rake skins:cache_chooser_skins RAILS_ENV=#{rails_env}", hosts: server.host
      run "/home/ao3app/bin/unicorns_reload", hosts: server.host
    end
  end

  desc "Restart the resque workers"
  task :restart_workers, roles: :workers do
    run "/home/ao3app/bin/workers_reload"
  end

  desc "Restart the schedulers"
  task :restart_schedulers, roles: :schedulers do
    run "/home/ao3app/bin/scheduler_reload"
  end

  desc "Get the config files"
  task :update_configs, roles: [:app, :web, :workers, :schedulers] do
    run "/home/ao3app/bin/create_links_on_install"
  end

  desc "Update the web-related whenever tasks"
  task :update_cron_web, roles: :web do
    # run "bundle exec whenever --update-crontab web -f config/schedule_web.rb"
    run "echo cron entries are currently managed by hand"
  end

  # This should only be one machine
  desc "update the crontab for whatever machine should run the scheduled tasks"
  task :update_cron, roles: :app, only: {primary: true} do
    # run "bundle exec whenever --update-crontab #{application}"
    run "echo cron entries are currently managed by hand"
  end

  # Needs to run on web (front-end) servers, but they must also have rails installed
  desc "Re-caches the site skins"
  task :reload_site_skins do
    find_servers(roles: :web).each do |server|
      puts "Caching skins on #{server.host}"
      run "cd ~/app/current ; bundle exec rake skins:cache_chooser_skins  RAILS_ENV=#{rails_env} ; cd ~/app ; rm web_old ; ln -f -s `readlink -f current` web_new ; mv web web_old ; mv web_new web", hosts: server.host
      sleep (10)
    end
  end
end

# ORDER OF EVENTS
# Calling "cap deploy" runs:
#   deploy:update which runs:
#       deploy:update_code
#       deploy:symlink
#   deploy:restart
#
# Calling "cap deploy:migrations" inserts the task "deploy:migrate" before deploy:symlink
#

# after and before task triggers that should run on both staging and production
#before "deploy:migrate", "deploy:web:disable"
#after "deploy:migrate", "extras:run_after_tasks"

#before "deploy:symlink", "deploy:web:enable_new"
#after "deploy:symlink", "extras:update_revision"

after "deploy:restart", "deploy:update_cron"
after "deploy:restart", "deploy:update_cron_web"
#after "deploy:restart", "extras:restart_delayed_jobs"
#after "deploy:restart", "deploy:cleanup"

after "deploy:restart", "deploy:restart_workers"
after "deploy:restart", "deploy:restart_schedulers"
after "deploy:symlink", "deploy:update_configs"