require 'yaml'
include FileUtils

content = File.open('angularFiles.js', 'r') {|f| f.read }
files = eval(content.gsub(/\};(\s|\S)*/, '}').
            gsub(/angularFiles = /, '').
            gsub(/:/, '=>').
            gsub(/\/\//, '#'));

BUILD_DIR = 'build'

task :default => [:compile, :test]


desc 'Init the build workspace'
task :init do
  FileUtils.mkdir(BUILD_DIR) unless File.directory?(BUILD_DIR)

  v = YAML::load( File.open( 'version.yaml' ) )
  match = v['version'].match(/^([^-]*)(-snapshot)?$/)

  NG_VERSION = Struct.new(:full, :major, :minor, :dot, :codename).
                      new(match[1] + (match[2] ? ('-' + %x(git rev-parse HEAD)[0..7]) : ''),
                          match[1].split('.')[0],
                          match[1].split('.')[1],
                          match[1].split('.')[2].sub(/\D+.*$/, ''),
                          v['codename'])
end


desc 'Clean Generated Files'
task :clean do
  FileUtils.rm_r(BUILD_DIR, :force => true)
  FileUtils.mkdir(BUILD_DIR)
end


desc 'Compile Scenario'
task :compile_scenario => :init do

  concat_file('angular-scenario.js', [
      'lib/jquery/jquery.js',
      'src/ngScenario/angular.prefix',
      files['angularSrc'],
      files['angularScenario'],
      'src/ngScenario/angular.suffix',
  ], gen_css('css/angular.css') + "\n" + gen_css('css/angular-scenario.css'))
end

desc 'Compile JSTD Scenario Adapter'
task :compile_jstd_scenario_adapter => :init do

  concat_file('jstd-scenario-adapter.js', [
      'src/ngScenario/jstd-scenario-adapter/angular.prefix',
      'src/ngScenario/jstd-scenario-adapter/Adapter.js',
      'src/ngScenario/jstd-scenario-adapter/angular.suffix',
  ])

  # TODO(vojta) use jstd configuration when implemented
  # (instead of including jstd-adapter-config.js)
  File.open(path_to('jstd-scenario-adapter-config.js'), 'w') do |f|
    f.write("/**\r\n" +
            " * Configuration for jstd scenario adapter \n */\n" +
            "var jstdScenarioAdapter = {\n  relativeUrlPrefix: '/build/docs/'\n};\n")
  end
end


desc 'Compile JavaScript'
task :compile => [:init, :compile_scenario, :compile_jstd_scenario_adapter] do

  concat_file('angular.js', [
        'src/angular.prefix',
        files['angularSrc'],
        'src/angular.suffix',
      ], gen_css('css/angular.css', true))

  FileUtils.cp_r 'src/ngLocale', path_to('i18n')

  concat_file('angular-loader.js', [
      'src/loader.prefix',
      'src/loader.js',
      'src/loader.suffix'])


  concat_module('sanitize', [
      'src/ngSanitize/sanitize.js',
      'src/ngSanitize/directive/ngBindHtml.js',
      'src/ngSanitize/filter/linky.js'])

  concat_module('resource', ['src/ngResource/resource.js'])
  concat_module('cookies', ['src/ngCookies/cookies.js'])


  FileUtils.cp 'src/ngMock/angular-mocks.js', path_to('angular-mocks.js')

  closure_compile('angular.js')
  closure_compile('angular-cookies.js')
  closure_compile('angular-loader.js')
  closure_compile('angular-resource.js')
  closure_compile('angular-sanitize.js')

end


desc 'Generate docs'
task :docs => [:init] do
  `node docs/src/gen-docs.js`
  rewrite_file(path_to('docs/.htaccess')) do |content|
    content.sub!('"NG_VERSION_FULL"', NG_VERSION.full)
  end
end


desc 'Create angular distribution'
task :package => [:clean, :compile, :docs] do
  tarball = "angular-#{NG_VERSION.full}.tgz"

  pkg_dir = path_to("pkg/angular-#{NG_VERSION.full}")
  FileUtils.rm_r(path_to('pkg'), :force => true)
  FileUtils.mkdir_p(pkg_dir)

  [ path_to('angular.js'),
    path_to('angular.min.js'),
    path_to('angular-loader.js'),
    path_to('angular-loader.min.js'),
    path_to('angular-mocks.js'),
    path_to('angular-cookies.js'),
    path_to('angular-cookies.min.js'),
    path_to('angular-resource.js'),
    path_to('angular-resource.min.js'),
    path_to('angular-sanitize.js'),
    path_to('angular-sanitize.min.js'),
    path_to('angular-scenario.js'),
    path_to('jstd-scenario-adapter.js'),
    path_to('jstd-scenario-adapter-config.js'),
  ].each do |src|
    dest = src.gsub(/^.*\//, '').gsub(/((\.min)?\.js)$/, "-#{NG_VERSION.full}\\1")
    FileUtils.cp(src, pkg_dir + '/' + dest)
  end

  FileUtils.cp_r path_to('i18n'), "#{pkg_dir}/i18n-#{NG_VERSION.full}"
  FileUtils.cp_r path_to('docs'), "#{pkg_dir}/docs-#{NG_VERSION.full}"

  rewrite_file("#{pkg_dir}/angular-mocks-#{NG_VERSION.full}.js") do |content|
    content.sub!('"NG_VERSION_FULL"', NG_VERSION.full)
  end


  [ "#{pkg_dir}/docs-#{NG_VERSION.full}/index.html",
    "#{pkg_dir}/docs-#{NG_VERSION.full}/index-jq.html",
    "#{pkg_dir}/docs-#{NG_VERSION.full}/index-nocache.html",
    "#{pkg_dir}/docs-#{NG_VERSION.full}/index-jq-nocache.html",
    "#{pkg_dir}/docs-#{NG_VERSION.full}/index-debug.html",
    "#{pkg_dir}/docs-#{NG_VERSION.full}/index-jq-debug.html"
  ].each do |src|
    rewrite_file(src) do |content|
      content.sub!('angular.js', "angular-#{NG_VERSION.full}.js").
              sub!('angular-resource.js', "angular-resource-#{NG_VERSION.full}.js").
              sub!('angular-cookies.js', "angular-cookies-#{NG_VERSION.full}.js").
              sub!('angular-sanitize.js', "angular-sanitize-#{NG_VERSION.full}.js")
    end
  end


  rewrite_file("#{pkg_dir}/docs-#{NG_VERSION.full}/docs-scenario.html") do |content|
    content.sub!('angular-scenario.js', "angular-scenario-#{NG_VERSION.full}.js")
  end


  [ "#{pkg_dir}/docs-#{NG_VERSION.full}/appcache.manifest",
    "#{pkg_dir}/docs-#{NG_VERSION.full}/appcache-offline.manifest"
  ].each do |src|
    rewrite_file(src) do |content|
      content.sub!('../angular.min.js', "angular-#{NG_VERSION.full}.min.js").
              sub!('/build/docs/', "/#{NG_VERSION.full}/docs-#{NG_VERSION.full}/")
    end
  end


  %x(tar -czf #{path_to(tarball)} -C #{path_to('pkg')} .)

  FileUtils.cp path_to(tarball), pkg_dir
  FileUtils.mv pkg_dir, path_to(['pkg', NG_VERSION.full])

  puts "Package created: #{path_to(tarball)}"
end


namespace :server do

  desc 'Run JsTestDriver Server'
  task :start do
    sh %x(java -jar lib/jstestdriver/JsTestDriver.jar --browser open --port 9876)
  end

  desc 'Run JavaScript tests against the server'
  task :test do
    sh %(java -jar lib/jstestdriver/JsTestDriver.jar --tests all)
  end

end


desc 'Run JavaScript tests'
task :test do
  sh %(java -jar lib/jstestdriver/JsTestDriver.jar --tests all --browser open --port 9876)
end


desc 'Lint'
task :lint do
  out = %x(lib/jsl/jsl -conf lib/jsl/jsl.default.conf)
  print out
end


desc 'push_angularjs'
task :push_angularjs => :compile do
  sh %(cat angularjs.ftp | ftp -N angularjs.netrc angularjs.org)
end



###################
# utility methods #
###################


##
# generates css snippet from a given files and optionally applies simple minification rules
#
def gen_css(cssFile, minify = false)
  css = ''
  File.open(cssFile, 'r') do |f|
    css = f.read
  end

  if minify
    css.gsub! /\n/, ''
    css.gsub! /\/\*.*?\*\//, ''
    css.gsub! /:\s+/, ':'
    css.gsub! /\s*\{\s*/, '{'
    css.gsub! /\s*\}\s*/, '}'
    css.gsub! /\s*\,\s*/, ','
    css.gsub! /\s*\;\s*/, ';'
  end

  #escape for js
  css.gsub! /\\/, "\\\\\\"
  css.gsub! /'/, "\\\\'"
  css.gsub! /\n/, "\\n"

  return %Q{angular.element(document).find('head').append('<style type="text/css">#{css}</style>');}
end


##
# returns path to the file in the build directory
#
def path_to(filename)
  return File.join(BUILD_DIR, *filename)
end


def closure_compile(filename)
  puts "Compiling #{filename} ..."

  min_path = path_to(filename.gsub(/\.js$/, '.min.js'))

  %x(java -jar lib/closure-compiler/compiler.jar \
        --compilation_level SIMPLE_OPTIMIZATIONS \
        --language_in ECMASCRIPT5_STRICT \
        --js #{path_to(filename)} \
        --js_output_file #{min_path})

  rewrite_file(min_path) do |content|
    content.sub!("'use strict';", "").
            sub!(/\(function\([^)]*\)\{/, "\\0'use strict';")
  end
end


def concat_file(filename, deps, footer='')
  puts "Building #{filename} ..."
  File.open(path_to(filename), 'w') do |f|
    concat = 'cat ' + deps.flatten.join(' ')

    content = %x{#{concat}}.
              gsub('"NG_VERSION_FULL"', NG_VERSION.full).
              gsub('"NG_VERSION_MAJOR"', NG_VERSION.major).
              gsub('"NG_VERSION_MINOR"', NG_VERSION.minor).
              gsub('"NG_VERSION_DOT"', NG_VERSION.dot).
              gsub('"NG_VERSION_CODENAME"', NG_VERSION.codename).
              gsub(/^\s*['"]use strict['"];?\s*$/, ''). # remove all file-specific strict mode flags
              sub(/\(function\([^)]*\)\s*\{/, "\\0\n'use strict';") # add single strict mode flag

    f.write(content)
    f.write(footer)
  end
end


def concat_module(name, files)
  concat_file('angular-' + name + '.js', ['src/module.prefix'] + files + ['src/module.suffix'])
end


def rewrite_file(filename)
  File.open(filename, File::RDWR) do |f|
    content = f.read

    content = yield content

    raise "File rewrite failed - No content!" unless content

    f.truncate 0
    f.rewind
    f.write content
  end
end