#!/usr/bin/env ruby
# Copyright (c) 2015 SUSE LLC
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 3 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.   See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, contact SUSE LLC.
#
# To contact SUSE about this file by physical or electronic mail,
# you may find current contact information at www.suse.com
require 'docker'
require 'json'

app_name = "<%= @name %>"
web_env_vars = <%= @services["web"]["environment"].to_a.map { |ar| ar.join("=") } %>
db_env_vars = <%= @services["db"]["environment"].to_a.map { |ar| ar.join("=") } %>
db_workload = "<%= @workloads.find { |_, config| config["service"] == "db" }.first %>"

def find_image(name)
  Docker::Image.get(name)
rescue
  return false
end

def build_image(path, name)
  if find_image(name)
    puts "Found #{name} image, not building again"
  else
    puts "Building image #{name}"
    Docker::Image.build_from_dir(path, t: name) do |output|
      print JSON.parse(output)["stream"]
    end
  end
end

puts "Setting up #{db_workload}"
if File.exists?("#{Dir.pwd}/#{db_workload}/data/configured.txt")
  puts "Exiting as database has already been configured.\n" \
    "If you want to re run the configuration just remove the files in #{Dir.pwd}/#{db_workload}/data/"
  exit 1
end

db_image = "#{app_name}_db"
build_image("./#{db_workload}", db_image)

volumes = ["#{Dir.pwd}/#{db_workload}/data:/var/lib/mysql"]
db = Docker::Container.create("Image" => db_image, "name" => "#{db_image}_0", "Env" => db_env_vars, "Binds" => volumes, "Tty" => true, "Stream" => true)
db.tap(&:start).attach(tty: true) { |output| print output }

web_image = "#{app_name}_web"
build_image("./rails", web_image)

db.start

command = ["rake", "db:create", "db:migrate"]
web = Docker::Container.create("Image" => web_image, "name" => "#{web_image}_0", "Cmd" => command, "Links" => ["#{db_image}_0:db"], "Env" => web_env_vars, "Tty" => true)
web.tap(&:start).attach(tty: true) { |output| print output }

puts "Stopping db service"
db.kill

puts "removing containers"
web.remove
db.remove