#!/usr/bin/env ruby

MADSCIENCE_REPO_URL = ENV['MADSCIENCE_REPO'] ||
  "git@github.com:noahgibbs/rubydeploy-deploy-repo.git"

# TODO: Add Windows runas incantation to replace sudo on Windows
USAGE_INFO = <<USAGE
Usage:
  sudo #{$0} setup
  #{$0} clone

  OR

  rvmsudo #{$0} setup
  ${$0} clone
USAGE

# First, make sure we have the right Ruby version
# TODO: add more checks for RUBY_VERSION, RUBY_PLATFORM, etc. Ensure MRI.
if RUBY_PLATFORM == "java"
  raise "Please install and run the MadScience gem in the Ruby you'll be deploying with! That means MRI 1.9.2+!"
end
unless RUBY_VERSION[0..1] == "2." || RUBY_VERSION[0..2] == "1.9"
  raise "Please install Ruby version 1.9.2+ for MadScience compatibility!"
end

# Require the MadScience gem, which will then be in $LOAD_PATH
require "madscience"
require "madscience/version"

cur_dir = Dir.pwd

# Change to MadScience dir to get correct Gemfile
ms_path = $LOAD_PATH.detect { |p| File.exist? File.join(p, "..", ".madscience_gem_location") }
raise "Can't find MadScience gem in $LOAD_PATH: #{$LOAD_PATH.inspect}!" unless ms_path
Dir.chdir File.join(ms_path, "..")

# Set up Bundler with the MadScience gem's Gemfile
require "bundler"
Bundler.setup

# TODO: make sure we're running with sufficient permissions - or use sudo?
# On Mac and Linux, can check for Process.uid == 0

if ARGV[0] == "setup"
  if ARGV.size > 1
    puts "#{$0} setup takes no other arguments!"
    exit -1
  end
  # Now we'll use Chef to install the right version of Vagrant
  # with the right plugin(s).

  system("librarian-chef", "install")
  system("chef-solo", "-c", "solo.rb") or exit -1
  exit 0  # Success!
end

if ARGV[0] == "clone"
  if ARGV.size > 1
    puts "#{$0} clone takes no other arguments!"
    exit -1
  end

  # Change back to pre-Bundler-setup directory where we were invoked
  Dir.chdir cur_dir

  home_dir = ENV['HOME'] || ENV['userprofile']
  location = "#{home_dir}/deploy_repo"

  # Now we'll git clone the MadScience repo, at a branch corresponding to our MadScience version
  # TODO: check out MadScience::VERSION branch when we start having real releases
  cmd = "git clone #{MADSCIENCE_REPO_URL} #{location}"

  unless system cmd
    puts "Couldn't successfully clone MadScience repo from #{MADSCIENCE_REPO_URL}, branch #{MadScience::VERSION}!"
    exit -1
  end

  puts "Successfully cloned repo into #{location} under directory #{location}. Now go in and customize it."
  exit 0
end

if ARGV == []
  puts "No command given."
  puts USAGE_INFO
  exit -1
end

puts "Unrecognized command: #{ARGV.inspect}!"
puts USAGE_INFO
exit -1