#!/usr/bin/env ruby

require 'fileutils'
require 'optparse'
require 'methadone'
require 'methadone/cli'

include FileUtils
include Methadone::Main
include Methadone::CLILogging
include Methadone::CLI
include Methadone::SH

main do |app_name|
  check_and_prepare_basedir!(app_name,options[:force])
  using_readme = options[:readme]

  gemname = File.basename(app_name)
  module_name = gemname.split(/-/).map(&:capitalize).collect{ |segment| segment.split(/_/).map(&:capitalize).join('') }.join('::')

  debug "Creating project for gem #{gemname}"

  chdir File.dirname(app_name)

  require_file = nil
  sh! "bundle gem #{gemname} --no-color" do |stdout|
    require_file = stdout.split(/\n/).select { |file|
      file =~ /\.rb$/ && file !~ /version.rb$/
    }.first
  end
  rm_rf "#{gemname}/spec"   # Don't want the default RSpec droppings
  rm_rf "#{gemname}/.rspec"

  require_file = gemname if require_file.nil?
  require_file.gsub!(/^.*lib\//,'')

  chdir gemname

  template_dirs_in(:full).each  { |dir| mkdir_p dir }

  rspec = options[:rspec]

  ["Rakefile", ".gitignore", ].each do |file|
    copy_file file, :binding => binding
  end

  if rspec
    template_dirs_in(:rspec).each  { |dir| mkdir_p dir }
    copy_file "spec/something_spec.rb", :from => :rspec, :binding => binding
  else
    template_dirs_in(:test_unit).each  { |dir| mkdir_p dir }
    copy_file "test/unit/test_something.rb", :from => :test_unit, :binding => binding
    copy_file "test/integration/test_cli.rb", :from => :test_unit, :binding => binding
  end


  gemspec = "#{gemname}.gemspec"
  gem_variable = File.open(gemspec) { |x| x.read }.match(/(\w+)\.executables/)[1]

  license = options[:license]
  warn "warning: your app has no license" unless license
  license = nil if license == 'NONE'
  if license
    copy_file "#{options[:license]}_LICENSE.txt", :as => "LICENSE.txt"
  else
    #Remove the MIT license generated by `bundle gem`
    debug "Making sure no LICENSE.txt file exists at the root of the repo"
    FileUtils.rm_f "LICENSE.txt"
  end

  #Ensure the gemspec file mentions the correct license
  gemspec_content = File.read(gemspec)
  if gemspec_content =~ /(^\s*#{gem_variable}\.license\s*=\s*).*/
    gemspec_content.gsub!(/(^\s*#{gem_variable}\.license\s*=\s*).*/,"\\1#{license.to_s.inspect}")
  else
    gemspec_content.gsub!(/(^\s*#{gem_variable}\.name\s*=\s*.*)/,"\\1\n#{"  #{gem_variable}.license".ljust(20)} = #{license.to_s.inspect.upcase}")
  end
  # RubyGems won't deal with a gemspec in this state and so Bundler won't even
  # work at all.  This is not helpful, so replace the magic keys its looking for
  # with something else
  gemspec_content.gsub!(/TODO/,"to-do")
  gemspec_content.gsub!(/FIXME/,"fix me")
  gemspec_content.gsub!(/^.*\.homepage.*$/,"")
  File.open(gemspec,'w') {|f| f.write gemspec_content }


  copy_file "README.rdoc", :binding => binding if using_readme

  copy_file "bin/executable", :as => gemname, :executable => true, :binding => binding

  add_to_file gemspec, [
    "  #{gem_variable}.add_development_dependency('rdoc')",
    "  #{gem_variable}.add_dependency('methadone', '~> #{Methadone::VERSION}')",
  ], :before => /^end\s*$/
  ruby_major,ruby_minor,ruby_patch = RUBY_VERSION.split(/\./).map(&:to_i)

  if ruby_major >= 2 && ruby_minor >= 2
    add_to_file gemspec, [
      "  #{gem_variable}.add_development_dependency('test-unit')",
    ], :before => /^end\s*$/
  end

  if rspec
    add_to_file gemspec, [
    "  #{gem_variable}.add_development_dependency('rspec', '~> 3')",
    ], :before => /^end\s*$/
  end
  FileUtils.rm_f "README.md", verbose: true

  sh! %q(git add --all .)
end

options[:readme] = true

description "Kick the bash habit by bootstrapping your Ruby command-line apps"

on("--force","Overwrite files if they exist")
on("--[no-]readme","[Do not ]produce a README file")
on("--rspec", "Generate RSpec unit tests instead of Test::Unit")

licenses = %w(mit apache gplv2 gplv3 custom NONE)
on("-l LICENSE","--license",licenses,"Specify the license for your project",'(' + licenses.join('|') + ')')

use_log_level_option

arg :app_name, :required, "Name of your app, which is used for the gem name and executable name"

version Methadone::VERSION, :compact => true

go!