#  Example rails app template script
#  I included some functions and other things in this file
#  that I would usually keep seperate and just require.

require 'yaml'

#   I like to use the irb replacement pry to debug scripts like
#   this if you have the pry gem you can uncomment the following line
#require 'pry'
#   Then place the next (uncommented) line near where you are
#   having issues and when the script is  run it will break into
#   a pry session.
#binding.pry

######
# SETUP
######

# A quick descriptive name for the template
def template_name
  "Postgres ActiveAdmin setupper"
end
#Describe quickly what is going to happen when this template is run
def desc
<<-END_DESC
  Assumes that you are using postgres for development, test and production
  and that you have the psql command available.

  Will setup config/database.yml, create postgres databases if necessary.
  Will install ActiveAdmin, and track the AdminUser as an ActiveAdmin resource.

  NOTE:  Due to the way templates work you may need to have the required gems installed
         on your system or current rvm gemset before you procede.
         (TODO:  add a check to see if necessary gems are installed)
END_DESC
end

######
#   Some Functions
#    Included here for example purposes(I ususally source from a seperate file)
######

#Ask a question if fallback is true otherwise just return the given default
def ask_with_default(statement, default, fallback=false)
  if (fallback) then
    default
  else
    say("#{statement} [default: #{default} ]",:BLUE)
    input = $stdin.gets.strip
    input.empty? ? default : input
  end
end

#use to report things that have been done or applied (just saves setting the color each time)
def verbate(statement)
  say("     " + statement,:GREEN)
end

#if called with true defaults will used and no questions will be asked.
def config_database_yml(just_defaults = false)
  default_db_adapter = 'postgresql'
  default_db_username = ENV['USER']  # <= EDIT you may need to change the db username.  default is to use shell login name.
  default_db_password = 'PASSWORD'   # <= EDIT
  environment_names = %w(development test production)
  create_database_sql = '-------------'
  dbconfig = {}
  environment_names.each do |e|
      say("Configuring Database settings for #{e} environment.",:GREEN)
      say("Generated settings will be placed in db/database.yml")
      dbconfig[e] = {}
      dbconfig[e]['adapter'] = default_db_adapter
      dbconfig[e]['encoding'] = 'unicode'
      dbconfig[e]['pool'] = 5
      dbconfig[e]['database'] = ask_with_default("What is the name for the #{e} database","#{app_name}_#{e}",just_defaults)
        verbate("Using database #{dbconfig[e]['database']} for #{e} environment.")
      dbconfig[e]['username'] = ask_with_default("What is the username for the #{e} environment database (#{dbconfig[e]['database']})?", default_db_username,just_defaults)
        verbate("Using username  '#{dbconfig[e]['username']}' for #{e} environment.")
      dbconfig[e]['password'] = ask_with_default("What is the password for user `#{dbconfig[e]['username']}` on database (#{dbconfig[e]['database']})?",default_db_password, just_defaults)
        verbate("Using password `#{dbconfig[e]['password']}`  for '#{dbconfig[e]['username']}' for #{e} environment.")
  create_database_sql << <<-SQL_END
--
-- {e} Database
--
CREATE DATABASE #{dbconfig[e]['database']}
  WITH ENCODING='UTF8'
       OWNER=#{dbconfig[e]['username']}
       CONNECTION LIMIT=-1;
--Uncomment next line if you want public connect access to DB then re-run this sql.
--GRANT CONNECT ON DATABASE #{dbconfig[e]['database']} TO public;
-------------
SQL_END
  end
  file('db/create_dbs.sql',create_database_sql)
  file 'config/database.yml', dbconfig.to_yaml
  if yes?("Create the postgres databases?") then
    say("Provide your password for psql to create your databases",:magenta)
    inside('db') do
    #Due to the way psql works (on my system at least) an existing database is required to login.
    #The default is a database of the users login name, so I have a database that
    #has the same name as my shell login name, and my postgres username is also
    #my shell login name.  You may need to change the -d flag to point to a db that
    #exists on your system, and perhaps add a -U flag followed by your postgresql username
    run "psql -d #{default_db_username} -f create_dbs.sql"  # <= EDIT see note above
    end
  end
end

#
# Begin of actual template script
#
say("ABOUT TO RUN TEMPLATE: #{template_name} ", :MAGENTA)
puts desc
exit unless yes?("Shall I continue?")


if yes?("Setup PostgresSql Database with defaults?") then
  config_database_yml(true)
else
  config_database_yml(false)
end

say("Adding Gems to Gemfile")
gem 'pg'
gem 'thin'
#also write a simple  procfile for thin
file 'Procfile', <<-THIN_PROC_END
web: bundle exec rails server thin -p $PORT
THIN_PROC_END
gem 'activeadmin'
gem "meta_search", '>= 1.1.0.pre'
gem 'sass-rails', "  ~> 3.1.0"

# gem_group :development do
#   gem 'foreman'
# end
gem 'foreman'


git :init
git :add => "."
git :commit => "-a -m 'Initial Commit'"
generate 'active_admin:install'
git :add => "."
git :commit => "-a -m 'Install Active Admin'"
rake 'db:migrate'
generate 'active_admin:resource', "AdminUser"
git :add => "."
git :commit => "-a -m 'Track AdminUser as an ActiveAdmin resource'"
say("You still need to set up mail delevery system for ActiveAdmin!
  Look at the source of this script
  (#{__FILE__})
  for a quick example provided in the comments", :RED)
puts
ask("Done running template.  Just wanted you to see the note above ;-).  About to let rails finish creating your project.[hit return]")

# For small production and pre-deploy on larger apps I use sendgrid via the heroku addon to send mail
# if you have enabled sendgrid for your heroku app you can add the following to

# config/environments/production.rb
################################
#
# #This Address will be the host where the link in the email will point
# # config.action_mailer.default_url_options = { :host => 'MYDOMAIN.EXT' } # <= EDIT
#
# #On heroku these ENV variables are setup for us (since we have enabled sendgrid)
# ActionMailer::Base.smtp_settings = {
#   :user_name => ENV['SENDGRID_USERNAME'],
#   :password => ENV['SENDGRID_PASSWORD'],
#   :domain => ENV['SENDGRID_DOMAIN'],
#   :address => "smtp.sendgrid.net",
#   :port => 587,
#   :authentication => :plain,
#   :enable_starttls_auto => true
# }
##############################

# To use sendgrid locally (once you have it setup on heroku). I use `heroku config`
# to see my generated sendgrid variables then place them in a file called local_pass_store (export VAR=VALUE) at the root of my project
#  and then `source local_pass_store` before I start the server or console.

# config/environments/development.rb
################################
#
# #This Address will be the host where the link in the email will point
# config.action_mailer.default_url_options = { :host => 'localhost:5000' }
#
# #Note that these variable need to be set in the shell before starting the
# #local server or console (source local_pass_store)
# ActionMailer::Base.smtp_settings = {
#   :user_name => ENV['SENDGRID_USERNAME'],
#   :password => ENV['SENDGRID_PASSWORD'],
#   :domain => ENV['SENDGRID_DOMAIN'],
#   :address => "smtp.sendgrid.net",
#   :port => 587,
#   :authentication => :plain,
#   :enable_starttls_auto => true
# }

#You also need to edit the config/initializers/devise.rb file and change the line
#  config.mailer_sender = "please-change-me-at-config-initializers-devise@example.com"
#to the account you want the mail to look like it was sent from