#!/usr/bin/env ruby

begin
  require 'rubygems'
rescue LoadError
  # no rubygems to load, so we fail silently
end

require 'fileutils'
require 'active_support'
require 'optparse'

require 'newgem'

templates = File.dirname(__FILE__) + '/../templates/'

OPTIONS = {
  :import_path => nil,
  :version     => '0.0.1',
  :full_name   => nil,
  :email       => nil,
  :bin_name    => nil,
  :svn_struct  => nil,
  :test_framework => 'test::unit'
}
parser = OptionParser.new do |opts|
  opts.banner = <<BANNER
Take any library or Rails plugin or command line application,
gemify it, and easily share it with the Ruby world.

Usage: #{File.basename($0)} [options] <gemname>

Options are:
BANNER
  opts.separator ""
  opts.on("-b", "--bin-name=BIN_NAME[,BIN_NAME2]", String,
          "Sets up executable scripts in the bin folder.",
          "Default: none") { |OPTIONS[:bin_name]| }
  opts.on("-i", "--import_path=PATH", String,
          "Path where your files could be copied from.",
          "Default: none") { |OPTIONS[:import_path]| }
  opts.on("-n", "--full_name=PATH", String,
          "Your name to be inserted into generated files.",
          "Default: ~/.rubyforge/user-config.yml[user_name]") { |OPTIONS[:full_name]| }
  opts.on("-e", "--email=PATH", String,
          "Your email to be inserted into generated files.",
          "Default: ~/.rubyforge/user-config.yml[email]") { |OPTIONS[:email]| }
  opts.on("-s", "--svn",
          "Creates trunk/branches/tags folders beneath <gemname> folder.",
          "Generated gem placed in trunk folder.") { |OPTIONS[:svn_struct]| }
  opts.on("-t", "--test-with=TEST_FRAMEWORK", String,
          "Select your preferred testing framework.",
          "Options: test::unit (default), rspec.") { |OPTIONS[:test_framework]| }           
  opts.on("-v", "--version=YOUR_VERSION", String,
          "Version of the gem you are creating.",
          "Default: 0.0.1") { |OPTIONS[:version]| }
  opts.on("-h", "--help",
          "Show this help message.") { puts opts; exit }
  opts.parse!(ARGV)
end
OPTIONS[:version] = OPTIONS[:version].to_s.split(/\./)
version_str       = OPTIONS[:version].join('.')
author            = OPTIONS[:full_name]
email             = OPTIONS[:email]
svn_struct        = OPTIONS[:svn_struct]
unless author && email
  rubyforge_config = Newgem::Rubyforge.new
  author ||= rubyforge_config.full_name
  email  ||= rubyforge_config.email
end
test_framework    = OPTIONS[:test_framework]

gem_name = project_name = ARGV[0]
parser.parse!(["-h"]) unless gem_name

module_name  = project_name.classify
root = project_name + (svn_struct ? '/trunk' : '')
lib = root + '/lib'
lib_project_name = root + '/lib/' + project_name
version = root + "/lib/" + project_name + "/version.rb"
readme, setup = %w(README.txt setup.rb).
	collect {|f| root + '/' + f}
template_files = %w(Rakefile History.txt License.txt Manifest.txt scripts/txt2html website/index.txt website/index.html website/template.rhtml)
copy_files = %w(website/javascripts/rounded_corners_lite.inc.js website/stylesheets/screen.css)

main = root + "/lib/" + project_name + ".rb"

examples = root + '/examples'
bin      = root + '/bin'
folders  = %w( scripts website website/javascripts website/stylesheets)

FileUtils.rm_rf project_name

puts "creating: " + project_name
Dir.mkdir project_name

if svn_struct
  %w[trunk branches tags].each do |folder|
    folder_path = File.join(project_name, folder)
    puts "creating: " + folder_path
    Dir.mkdir folder_path
  end
end

puts "creating: " + readme
File.open(readme, 'w') do |file|
  file << <<-eos
README for #{project_name}
===========#{'=' * project_name.length}

eos
end


puts "creating: " + lib
FileUtils.mkdir_p lib

folders.each do |folder|
  new_folder = root + '/' + folder
  puts "creating: " + new_folder
  FileUtils.mkdir_p new_folder
end

if OPTIONS[:import_path]
  require 'fileutils'
  OPTIONS[:import_path].chomp! if OPTIONS[:import_path][-1] == 47 # /
  FileUtils.cp_r OPTIONS[:import_path] + '/.', lib, :preserve => true
end

puts "creating: " + lib_project_name
FileUtils.mkdir_p lib_project_name

puts "creating: " + main
File.open(main, 'w') do |file|
  file << <<-EOS 
module #{module_name}
end

require '#{project_name}/version'
  EOS
end

puts "creating: " + version
File.open(version, 'w') do |file|
  file << <<-EOS
module #{module_name} #:nodoc:
  module VERSION #:nodoc:
    MAJOR = #{OPTIONS[:version][0] || '0'}
    MINOR = #{OPTIONS[:version][1] || '0'}
    TINY  = #{OPTIONS[:version][2] || '0'}

    STRING = [MAJOR, MINOR, TINY].join('.')
  end
end
  EOS
end

puts "creating: " + bin
Dir.mkdir bin

if OPTIONS[:bin_name]
  bin_names_list = OPTIONS[:bin_name].split(',')
  template = File.open(templates + 'app.rb','r') {|f| f.readlines.join}
  bin_names_list.each do |bin_name|
    puts "creating: " + bin + '/' + bin_name
    File.open(bin + '/' + bin_name, 'w') do |file|
      file << eval('"' + template.gsub(/"/, '\"') + '"')
    end
  end
  bin_names = bin_names_list.join(' ')
else
  bin_names = ''
  bin_names_list = []
end

# Setup spec/test::unit environments
# Would like to refactor this...
if test_framework == 'rspec'
  test = root + "/spec"
  test_helper = test + "/spec_helper.rb"
  test_template = 'spec.rb'
  unit_test = test + "/" + project_name + "_spec.rb"
  test_file_prefix = 'spec/NAME_spec'
  spec_opts = 'spec.opts'
  unit_test_template = <<-eos
require 'spec'
eos
  requirements = <<-eos
begin
  require 'spec/rake/spectask'
rescue LoadError
  puts 'To use rspec for testing you must install rspec gem:'
  puts '$ sudo gem install rspec'
  exit
end
  eos
  test_task = <<-eos
desc "Run the specs under spec/models"
Spec::Rake::SpecTask.new do |t|
  t.spec_opts = ['--options', "spec/spec.opts"]
  t.spec_files = FileList['spec/*_spec.rb']
end

desc "Default task is to run specs"
task :default => :spec
  eos
else  
  test = root + "/test"
  test_helper = test + "/test_helper.rb"
  test_template = 'test.rb'
  unit_test = test + "/test_" + project_name + ".rb"
  test_file_prefix = 'test/test_NAME'
  unit_test_template = <<-eos
require 'test/unit'
require File.dirname(__FILE__) + '/../lib/#{project_name}'
eos
  requirements = ''
  test_task = ''
end

puts "creating: " + test
Dir.mkdir test

puts "creating: " + test_helper
File.open(test_helper, 'w') do |file|
  file << unit_test_template
end

puts "creating: " + unit_test

template = File.open(templates + test_template,'r') {|f| f.readlines.join}
File.open(unit_test, 'w') do |file|
  file << eval('"' + template.gsub(/"/, '\"') + '"')
end

if test_framework == 'rspec'
  spec_opts_file = test + "/" + spec_opts
  puts "creating: " + spec_opts_file
  template = File.open(templates + spec_opts, 'r') { |f| f.readlines.join }  
  File.open(spec_opts_file, 'w') do |file|
    file << eval('"' + template.gsub(/"/, '\""') + '"')
  end  
end

puts "creating: " + examples
Dir.mkdir examples

puts "creating: " + setup
template = File.open(templates + 'setup.rb','r') {|f| f.readlines.join}
File.open(setup, 'w') do |file|
  file << template
end

bin_names_list = bin_names_list.collect {|name| 'bin/' + name }.join("\n")
bin_names_list += "\n" if bin_names_list.size > 0
test_names_list = ['helper.rb',"#{project_name}.rb"].sort.collect {|name| test_file_prefix.gsub('NAME', name) }.join("\n")

template_files.each do |template_file|
  puts "creating: " + root + '/' + template_file
  template = File.open(templates + template_file,'r') {|f| f.readlines.join}
  File.open(root + '/' + template_file, 'w') do |file|
    file << eval('"' + template.gsub(/"/, '\"') + '"')
  end  
end

copy_files.each do |file|
  puts "copying: " + root + '/' + file
  template = File.open(templates + file,'r') {|f| f.readlines.join}
  File.open(root + '/' + file, 'w') do |file|
    file << template
  end  
end



puts "NOW - update #{gem_name}/Rakefile with gem description, etc"