require "highline"
require "highline/import"
# &:symbol goodness.
require "facet/symbol/to_proc"
# blank? on string and nil
require "facet/string/blank"
require "facet/nilclass/blank"
# x.in?(y) is better than y.include?(x)
require "facet/kernel/in"
# Allows binding[]
require "facet/binding"
# What it says.
require "facet/kernel/__DIR__"
require "facet/kernel/instance_exec"
require "facet/module/alias_method_chain"
require "facet/module/memoize"
require "facet/array/head"
require "facet/string/starts_with"
require "facet/openobject"
require "facets/core/kernel/tap"
require "facets/core/enumerable/uniq_by"
# A different kind of buildr, one we use to create XML.
require "builder"


module Buildr
  VERSION = "1.2.3".freeze
end


# When running from +rake+, we already have an Application setup and must plug into it,
# since the top-level tasks come from there. When running from +buildr+, we get to load
# Rake and set everything up, and we use our own Application full of cool Buildr features.
unless defined?(Rake)
  require "rake"

  module Buildr
    class Application < Rake::Application #:nodoc:

      DEFAULT_BUILDFILES = ["buildfile", "Buildfile"] + DEFAULT_RAKEFILES

      OPTIONS = [     # :nodoc:
        ['--help',     '-H', GetoptLong::NO_ARGUMENT,
          "Display this help message."],
        ['--nosearch', '-N', GetoptLong::NO_ARGUMENT,
          "Do not search parent directories for the buildfile."],
        ['--quiet',    '-q', GetoptLong::NO_ARGUMENT,
          "Do not log messages to standard output."],
        ['--buildfile', '-f', GetoptLong::OPTIONAL_ARGUMENT,
          "Use FILE as the buildfile."],
        ['--require',  '-r', GetoptLong::REQUIRED_ARGUMENT,
          "Require MODULE before executing buildfile."],
        ['--trace',    '-t', GetoptLong::NO_ARGUMENT,
          "Turn on invoke/execute tracing, enable full backtrace."],
        ['--verbose',  '-v', GetoptLong::NO_ARGUMENT,
          "Log message to standard output (default)."],
        ['--version',  '-V', GetoptLong::NO_ARGUMENT,
          "Display the program version."],
        ['--freeze',   "-F",  GetoptLong::NO_ARGUMENT,
         "Freezes the Buildfile so it always uses Buildr version #{Buildr::VERSION}"],
        ['--unfreeze', "-U",  GetoptLong::NO_ARGUMENT,
         "Unfreezes the Buildfile to use the latest version of Buildr"]
      ]

      def initialize()
        super
        @rakefiles = DEFAULT_BUILDFILES
        @name = "Buildr"
        opts = GetoptLong.new(*command_line_options)
        opts.each { |opt, value| do_option(opt, value) }
        collect_tasks
      end

      def run()
        standard_exception_handling do
          load_buildfile
          top_level
        end
      end

      def do_option(opt, value)
        case opt
        when '--help'
          help
          exit
        when "--buildfile"
          @rakefiles.clear
          @rakefiles << value
        when '--version'
          puts "Buildr, version #{Buildr::VERSION}"
          exit
        when "--freeze" 
          find_buildfile
          puts "Freezing the Buildfile so it always uses Buildr version #{Buildr::VERSION}"
          gem = 
          original = File.read(rakefile)
          if original =~ /gem\s*(["'])buildr\1/
            modified = original.sub(/gem\s*(["'])buildr\1\s*,\s*(["']).*\2/, %{gem "buildr", "#{Buildr::VERSION}"})
          else
            modified = %{gem "buildr", "#{Buildr::VERSION}"\n} + original
          end
          File.open(rakefile, "w") { |file| file.write modified }
          exit
        when "--unfreeze"
          find_buildfile
          puts "Unfreezing the Buildfile to use the latest version of Buildr from your Gems repository."
          modified = File.read(rakefile).sub(/^\s*gem\s*(["'])buildr\1.*\n/, "")
          File.open(rakefile, "w") { |file| file.write modified }
          exit
        when '--require', "--nosearch", "--quiet", "--trace", "--verbose"
          super
        end
      end

      def find_buildfile()
        here = Dir.pwd
        while ! have_rakefile
          Dir.chdir("..")
          if Dir.pwd == here || options.nosearch
            error = "No Buildfile found (looking for: #{@rakefiles.join(', ')})"
            if STDIN.isatty
              chdir(original_dir) { task("generate").invoke }
              exit 1
            else
              raise error
            end
          end
          here = Dir.pwd
        end
      end

      def load_buildfile()
        find_buildfile
        puts "(in #{Dir.pwd})"
        load File.expand_path(@rakefile) if @rakefile != ''
        load_imports
      end

      def usage()
        puts "Buildr #{Buildr::VERSION}"
        puts
        puts "Usage:"
        puts "  buildr [-f buildfile] {options} targets..."
      end

      def help()
        usage
        puts
        puts "Options:"
        OPTIONS.sort.each do |long, short, mode, desc|
          if mode == GetoptLong::REQUIRED_ARGUMENT
            if desc =~ /\b([A-Z]{2,})\b/
              long = long + "=#{$1}"
            end
          end
          printf "  %-20s (%s)\n", long, short
          printf "      %s\n", desc
        end
        puts
        puts "For help with your buildfile:"
        puts "  buildr help"
      end

      def command_line_options
        OPTIONS.collect { |lst| lst[0..-2] }
      end

    end

    Rake.application = Application.new
  end
end


# Now it's safe to load Buildr, after we set up the Rake Application.
$LOAD_PATH.unshift __DIR__
["core", "tasks", "java"].each do |dir|
  Dir[File.join(__DIR__, dir, "*.rb")].map { |file| File.basename(file) }.each { |file| require "#{dir}/#{file}" }
end


# Methods defined in Buildr are both instance methods (e.g. when included in Project)
# and class methods when invoked like Buildr.artifacts().
module Buildr ; extend self ; end
# The Buildfile object (self) has access to all the Buildr methods and constants.
class << self ; include Buildr ; end
class Object #:nodoc:
  Buildr.constants.each { |c| const_set c, Buildr.const_get(c) unless const_defined?(c) }
end
# Project has visibility to everything in the Buildr namespace. (See above for constants)
class Project ; include Buildr ; end


module Buildr
  @loaded_features_to_ignore = $LOADED_FEATURES
end

# Load the settings files.
[ File.expand_path("buildr.rb", Gem::user_home), "buildr.rb" ].each { |file| load file if File.exist?(file) }
[ File.expand_path("buildr.rake", Gem::user_home), File.expand_path("buildr.rake") ].each do |file|
  if File.exist?(file)
    warn "Please use '#{file.ext('rb')}' instead of '#{file}'"
    load file
  end
end

#Load local tasks that can be used in the Buildfile.
Dir["#{Dir.pwd}/tasks/*.rake"].each do |file|
  unless $LOADED_FEATURES.include?(file)
    load file
    $LOADED_FEATURES << file
  end
end