=begin
Copyright (c) 2007 Pattern Park

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.

TODO: Update mxmlc task
 * Update mxmlc to include all advanced options
 * Clean up default values
 * Investigate jruby support, especially:
    http://livedocs.adobe.com/flex/201/html/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Book_Parts&file=compilers_123_09.html
=end

module Sprout
  class GemWrapError < StandardError #:nodoc:
  end

  # Creates a ruby gem from a slightly simpler rake task than what gems provides.
  # Adds support for adding a sprout.spec file to your new gem which is usually useful
  # for tool or library sprout gems.
  class GemWrapTask < Rake::Task
    # The full name of the gem to create like:
    #   t.gem_name = 'sprout-as3-bundle'
    attr_writer :gem_name
    # The type of sprout to create, defaults to 'library'
    # Other possible values are, 'bundle' and 'tool'
    attr_writer :sprout_type
    # Full string rubygem version for this sprout, usually in three parts like:
    #  t.version = '0.0.1'
    attr_writer :version
    # Folder that the newly-created gem should be placed in
    attr_writer :package
    # Summary or short description for the gem
    attr_writer :summary
    # The author that created the gem
    attr_writer :author
    # Email address for interested users to send questions to
    attr_writer :email
    # Homepage where users can learn more about this gem
    attr_writer :homepage
    # A string remote file specification usually something like:
    # 
    #   t.sprout_spec   =<<EOF
    #   - !ruby/object:Sprout::RemoteFileTarget 
    #     platform: universal
    #     url: http://as3flickrlib.googlecode.com/files/flickr-.87.zip
    #     archive_path: flickr-.87/src
    #   EOF
    attr_writer :sprout_spec

    def self.define_task(args, &block)
      t = super
      yield t if block_given?
      t.define
    end

    def define # :nodoc:
      define_gem_name
      define_extensions(extensions)
    end

    def initialize(task_name, app) # :nodoc:
      super
      @sprout_type    = "library"
      @package        = "pkg"
      @summary        = "#{task_name}"
      @email          = "projectsprouts@googlegroups.com"
      @homepage       = "http://www.projectsprouts.org"
    end
  
    def execute(*args) # :nodoc:
      super
      raise GemWrapError.new("A version must be provided to produce a Gem!") unless @version
      @summary = "#{name} #{@sprout_type} generated by Sprout::GemWrapTask" unless @summary

      FileUtils.mkdir_p(gem_package)
      render_sprout_spec(gem_package, @sprout_spec) if @sprout_spec
#      render_extensions(gem_package, extensions) if extensions.size

      Dir.chdir(gem_package) do
  
        spec = Gem::Specification.new do |s|
          files           = []
          s.platform      = Gem::Platform::RUBY
          s.version       = @version
          s.author        = @author if @author
          s.summary       = @summary
          s.name          = @gem_name
          s.email         = @email
          s.homepage      = @homepage
          s.rubyforge_project = 'sprout'
          s.requirements << {'sprout', '>= 0.7.1'}
          gem_dependencies.each do |dep|
            s.requirements << dep
          end
          if(File.exists?('sprout.spec'))
            files << 'sprout.spec'
          end
          if(extensions.size > 0)
            files << 'ext'
          end
          zipped_extensions.each do |ext|
            files << File.join('ext', File.basename(ext))
          end
          s.files         = files
        end
        Gem::Builder.new(spec).build
      end

      FileUtils.mv("#{gem_package}/#{@gem_name}-#{@version}.gem", @package)  
      FileUtils.rm_rf(gem_package)
    end
    
    # Add a gem dependency either with only the gem name
    # or with a full name and version hash like:
    # 
    #   t.add_dependency('sprout-flashplayer-tool')
    # or
    #   t.add_dependency('sprout-flashplayer-tool' => '9.115.0')
    #
    def add_dependency(args)
      gem_dependencies << args
    end

    def gem_dependencies
      return @gem_dependencies ||= []
    end
    
    # Add files to include in the gem/ext folder
    def extensions
      return @extensions ||= []
    end
    
    private

    def gem_package
      @gem_package ||= File.join(@package, @gem_name)
    end

    def zipped_extensions
      return @zipped_extensions ||= []
    end

    def define_gem_name
      @gem_name = "sprout-#{name}-#{@sprout_type}" if !@gem_name
    end

    def define_extensions(exts)
      exts.each do |ext|
        if(File.directory?(ext))
          full = File.expand_path(ext)
          t = nil

          zip full do |t|
            t.input = full
            t.output = File.join(gem_name, 'ext', File.basename(full) + '.zip')
          end
          puts "pwd: #{Dir.pwd} out #{t.output}"
          zipped_extensions << File.expand_path(t.output)
          prerequisites << t.output
        end
      end
    end

    def render_sprout_spec(target, spec)
      File.open(File.join(target, 'sprout.spec'), 'w') do |f|
        f.write(spec)
      end
    end

  end
end

def gem_wrap(args, &block)
  Sprout::GemWrapTask.define_task(args, &block)
end