require 'appengine-sdk'
require 'appengine-tools/web-xml'
require 'appengine-tools/xml-formatter'

SRC = File.expand_path(File.dirname(__FILE__) + '/src')
LIB = File.expand_path(File.dirname(__FILE__) + '/lib')
WAR = File.expand_path(File.dirname(__FILE__) + '/war')
CONFIG_RU = File.expand_path(File.dirname(__FILE__) + '/config.ru')
SERVLET = AppEngine::SDK::SDK_ROOT +
          '/lib/shared/geronimo-servlet_2.5_spec-1.2.jar'
APIS = AppEngine::SDK::API_JAR

WEB_INF_CLASSES = WAR + '/WEB-INF/classes'
WEB_XML = WAR + '/WEB-INF/web.xml'
AEWEB_XML = WAR + '/WEB-INF/appengine-web.xml'

MODEL = 'com/google/appengine/ext/duby/db/Model'
DUBY_APP = 'com/ribrdb/DubyApp'

MODEL_DUBY = "#{SRC}/#{MODEL}.duby"
MODEL_CLASS = "#{WEB_INF_CLASSES}/#{MODEL}.class"
DUBY_APP_DUBY = "#{SRC}/#{DUBY_APP}.duby"
DUBY_APP_CLASS = "#{WEB_INF_CLASSES}/#{DUBY_APP}.class"
LIST = "#{SRC}/com/ribrdb/list.dhtml"

def dubyc(*files)
  chdir(File.dirname(__FILE__) + '/src') do
    files = files.join ' '
    dest = '-d ../war/WEB-INF/classes'
    dubyc = '../../../bin/dubyc'
    options = "-I #{LIB} -p datastore"
    orig_classpath = ENV['CLASSPATH']
    ENV['CLASSPATH'] ||= ''
    ENV['CLASSPATH'] += ":#{SERVLET}:#{APIS}:#{WEB_INF_CLASSES}"
    sh %{#{dubyc} #{dest} #{options} #{files}}
    ENV['CLASSPATH'] = orig_classpath
  end
end

directory WEB_INF_CLASSES

file MODEL_CLASS => MODEL_DUBY do
  dubyc("#{MODEL}.duby")
end

file DUBY_APP_CLASS => [DUBY_APP_DUBY, LIST, MODEL_CLASS] do
  dubyc("#{DUBY_APP}.duby")
end

file WEB_XML => [WEB_INF_CLASSES, CONFIG_RU] do
  builder = WebXmlBuilder.new do
    eval IO.read(CONFIG_RU), nil, 'config.ru', 1
  end
  open(WEB_XML, 'w') do |webxml|
    xml = AppEngine::Rack::XmlFormatter.format(builder.to_xml)
    webxml.write(xml)
  end
  open(AEWEB_XML, 'w') do |aeweb|
    xml = AppEngine::Rack::XmlFormatter.format(AppEngine::Rack.app.to_xml)
    aeweb.write(xml)
  end
end

task :server => [WEB_XML, DUBY_APP_CLASS] do
  sh "dev_appserver.rb #{WAR}"
end

task :upload => [WEB_XML, DUBY_APP_CLASS] do
  sh "appcfg.rb update #{WAR}"
end

task :default => :server