#!/usr/bin/env ruby
require 'fileutils'
REFINERY_ROOT = File.expand_path(File.dirname(__FILE__) << "/..")
unless (app_path = ARGV.shift).nil? or app_path.length == 0
  # if "" or "." or "./" is specified then get the current directory otherwise accept the specified app_path.
  RAILS_ROOT = (app_path.length <= 2 and ((is_current_dir = app_path =~ /(\.(\/)?)/).nil? or is_current_dir < 2)) ? Dir.getwd : app_path
  if File.exists? RAILS_ROOT
    if ARGV.include?("--force")
      # remove the contents of the current directory
      Dir[File.join(RAILS_ROOT, "*")].each {|dir| FileUtils::rm_rf(dir, :secure => true) }
    else
      puts "The path you specified already exists. If you want to override this directory (i.e. delete all the current contents) run this again with --force"
    end
  end

  unless File.exists? RAILS_ROOT and !ARGV.include?("--force")
    # make the application path directory
    FileUtils::makedirs RAILS_ROOT
  
    # copy in all of the relevant directories and root files.
    to_copy = %w(app config db lib public script CONTRIBUTORS LICENSE Rakefile README).map do |dir| 
      File.join REFINERY_ROOT, dir
    end
    FileUtils::cp_r to_copy, RAILS_ROOT, :verbose => false
    # ensure lib/refinery_initializer.rb doesn't make it in.
    FileUtils::rm File.join(RAILS_ROOT, %w(lib refinery_initializer.rb)) if File.exists?(File.join(RAILS_ROOT, %w(lib refinery_initializer.rb)))
    
    # add in the database config file.
    FileUtils::move File.join(RAILS_ROOT, %w(config database.yml.example)), File.join(RAILS_ROOT, %w(config database.yml))
    
    # figure out the database name from the install path and swap out your_local_database with this name.
    unless RAILS_ROOT == "/" or RUBY_PLATFORM =~ /mswin/
      database_name = RAILS_ROOT.split(File::SEPARATOR).last
      # read in the file and split up the lines
      lines = File.open(File.join(RAILS_ROOT, %w(config database.yml)), "r").read.split("\n")
      lines.each do |line|
        line.gsub!("your_local_database", database_name)
        line.gsub!("your_test_database", "#{database_name}_test")
        line.gsub!("your_production_database", "#{database_name}_production")
      end
      # write the new content into the file.
      File.open(File.join(RAILS_ROOT, %w(config database.yml)), "w").puts(lines.join("\n"))
    else
      database_name = "your_local_database"
    end

    # update the environment file with a new secret key.
    require 'digest/sha1'
    new_digest = ""
    3.times { new_digest << Digest::SHA1.hexdigest("--refinery--#{Time.now.to_s}--#{rand(10000000)}--") }
    
    # read in the file and split up the lines
    lines = File.open(File.join(RAILS_ROOT, %w(config environment.rb)), "r").read.split("\n")
    lines.each do |line|
      match = line.scan(/(:secret)([^']*)([\'])([^\']*)/).flatten.last
      line.gsub!(match, new_digest) unless match.nil?
    end  
    # write the new content into the file.
    File.open(File.join(RAILS_ROOT, %w(config environment.rb)), "w").puts(lines.join("\n"))

  	puts "\n---------"
  	puts "Refinery successfully installed in '#{RAILS_ROOT}'!\n\n"

    # update core script files with symlinks.
    system "refinery-update-core #{RAILS_ROOT} --from-refinery-installer"
  
    puts "=== ACTION REQUIRED ==="
    puts "\nNow run these commands:"
    puts "\ncd #{RAILS_ROOT}"
    puts "rake gems:install"
    puts "rake db:setup"
    puts "\nruby script/server"
    puts "\nThis will install all the required gems, set up your database (named '#{database_name}') and launches the built-in webserver."
    puts "You can now see your site running in your browser at http://localhost:3000"
    puts "\nThanks for installing Refinery, enjoy creating your new application!"
  	puts "---------\n\n"
  end
else
  puts "Please specify the path where you want to install Refinery. i.e. refinery /path/to/project"
end