# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with this
# work for additional information regarding copyright ownership.  The ASF
# licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
# License for the specific language governing permissions and limitations under
# the License.

module Buildr
  module GWT

    class << self

      def version=(version)
        @version = version
      end

      def version
        @version || Buildr.settings.build['gwt'] || '2.5.1'
      end

      # The specs for requirements
      def dependencies(version = nil)
        ["com.google.gwt:gwt-dev:jar:#{version || self.version}"]
      end

      def gwtc_main(modules, source_artifacts, output_dir, unit_cache_dir, options = {})
        cp = Buildr.artifacts(self.dependencies(options[:version])).each(&:invoke).map(&:to_s) + Buildr.artifacts(source_artifacts).each(&:invoke).map(&:to_s)
        style = options[:style] || "OBFUSCATED," # "PRETTY", "DETAILED"
        log_level = options[:log_level] #  ERROR, WARN, INFO, TRACE, DEBUG, SPAM, or ALL
        workers = options[:workers] || 2

        args = []
        if log_level
          args << "-logLevel"
          args << log_level
        end
        args << "-strict"
        args << "-style"
        args << style
        args << "-localWorkers"
        args << workers
        args << "-war"
        args << output_dir
        if options[:compile_report_dir]
          args << "-compileReport"
          args << "-extra"
          args << options[:compile_report_dir]
        end

        if options[:draft_compile]
          args << "-draftCompile"
        end

        if options[:enable_closure_compiler].nil? || options[:enable_closure_compiler]
          args << "-XenableClosureCompiler"
        end

        args += modules

        properties = options[:properties] ? options[:properties].dup : {}
        properties["gwt.persistentunitcache"] = "true"
        properties["gwt.persistentunitcachedir"] = unit_cache_dir

        Java::Commands.java 'com.google.gwt.dev.Compiler', *(args + [{:classpath => cp, :properties => properties, :java_args => options[:java_args], :pathing_jar => false}])
      end

      def superdev_dependencies(version = nil)
        self.dependencies + ["com.google.gwt:gwt-codeserver:jar:#{version || self.version}"]
      end

      def gwt_superdev(module_name, source_artifacts, work_dir, options = {})

        cp = Buildr.artifacts(self.superdev_dependencies(options[:version])).each(&:invoke).map(&:to_s) + Buildr.artifacts(source_artifacts).each(&:invoke).map(&:to_s)

        args = []
        args << "-port" << (options[:port] || 5050)
        args << "-workDir" << work_dir
        (options[:src] || []).each do |src|
          args << "-src" << src
        end
        args << module_name

        properties = options[:properties] ? options[:properties].dup : {}

        java_args = options[:java_args] ? options[:java_args].dup : {}

        Java::Commands.java 'com.google.gwt.dev.codeserver.CodeServer', *(args + [{:classpath => cp, :properties => properties, :java_args => java_args, :pathing_jar => false}])
      end
    end

    module ProjectExtension
      include Extension

      def gwt(module_names, options = {})
        output_key = options[:output_key] || project.id
        output_dir = project._(:target, :generated, :gwt, output_key)
        artifacts = ([project.compile.target] + project.compile.sources + project.resources.sources).collect do |a|
          a.is_a?(String) ? file(a) : a
        end
        dependencies = options[:dependencies] ? artifacts(options[:dependencies]) : (project.compile.dependencies + [project.compile.target]).collect do |dep|
          dep.is_a?(String) ? file(dep) : dep
        end

        unit_cache_dir = project._(:target, :gwt, :unit_cache_dir, output_key)

        task = project.file(output_dir) do
          Buildr::GWT.gwtc_main(module_names,
                                (dependencies + artifacts).flatten.compact,
                                output_dir,
                                unit_cache_dir,
                                {:version => gwt_detect_version(dependencies)}.merge(options))
        end
        task.enhance(dependencies)
        task.enhance([project.compile])
        project.assets.paths << task
        task
      end

      def gwt_superdev_runner(module_name, options = {})

        dependencies = []
        if options[:dependencies]
          dependencies = artifacts(options[:dependencies])
        else
          sources = [] + project.compile.sources + project.resources.sources
          classes = [] + project.compile.dependencies + [project.compile.target]
          dependencies = (classes + sources).collect do |dep|
            dep.is_a?(String) ? file(dep) : dep
          end
        end

        desc "Run Superdev mode"
        project.task("superdev") do
          work_dir = project._(:target, :gwt, :superdev)
          mkdir_p work_dir
          Buildr::GWT.gwt_superdev(module_name,
                                   dependencies,
                                   work_dir,
                                   {:version => gwt_detect_version(dependencies)}.merge(options))
        end
      end

      protected

      def gwt_detect_version(dependencies)
        version = nil
        dependencies.each do |dep|
          if dep.respond_to?(:to_spec_hash)
            hash = dep.to_spec_hash
            if 'com.google.gwt' == hash[:group] && 'gwt-user' == hash[:id] && :jar == hash[:type]
              version = hash[:version]
            end
          end
        end
        version
      end
    end
  end
end

class Buildr::Project
  include Buildr::GWT::ProjectExtension
end