#!/usr/bin/env ruby
################################################################################
#
# Copyright (C) 2007 pmade inc. (Peter J Jones <pjones@pmade.com>)
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
################################################################################
require 'optparse'
require 'ostruct'

################################################################################
options = OpenStruct.new
options.environment = 'production'
options.username    = 'admin'
options.task        = 'deploy'
options.description = 'Automated deployment from the command line.'

webistrano_project = nil
webistrano_stage   = nil

################################################################################
OptionParser.new do |optparser|
  optparser.banner = "Usage: deploy [options] project stage"

  optparser.on('-h', '--help', "This message") do
    puts optparser
    exit
  end

  optparser.on('-e', '--environment=ENV', "RAILS_ENV for Webistrano (default: #{options.environment})") do |env|
    options.environment = env
  end
  
  optparser.on('-u', '--username=NAME', "Webistrano username to use (default: #{options.username})") do |user|
    options.username = user
  end

  optparser.on('-t', '--task=NAME', "Capistrano task to invoke (default: #{options.task})") do |task|
    options.task = task
  end
  
  optparser.on('-d', '--description=TEXT', "Deployment comment for Webistrano records") do |cmt|
    options.description = cmt
  end
  
  webistrano_project, webistrano_stage = optparser.permute!(ARGV)
  
  if webistrano_project.nil? or webistrano_stage.nil?
    puts optparser
    exit(1)
  end
end

################################################################################
# now it's time to make the connection to Webistrano
ENV['RAILS_ENV']  ||= options.environment
ENV['RAILS_ROOT'] ||= File.expand_path(File.dirname(__FILE__) + '/..')
Dir.chdir(ENV['RAILS_ROOT']) # required by Webistrano
require ENV['RAILS_ROOT'] + '/config/environment'

################################################################################
begin
  user    = User.find_by_login(options.username) or raise "no such user: #{options.username}"
  project = Project.find_by_name(webistrano_project) or raise "no such project: #{webistrano_project}"
  stage   = project.stages.find_by_name(webistrano_stage) or raise "no such stage: #{webistrano_stage}"
  
  unless stage.prompt_configurations.empty?
    raise "this stage requires prompted configuration, which is not yet implemented in deploy"
  end
  
  deployment = stage.deployments.build(:task => options.task, :description => options.description)
  deployment.user = user
  deployment.save or raise "failed to create deployment record: #{deployment.errors.full_messages}"

  deployer = Webistrano::Deployer.new(deployment)
  deployer.invoke_task! or raise "deployment failed"

rescue Exception => e
  $stderr.puts("deploy: #{e}")
  exit(1)
end