class Bundler::Dsl

def self.deprecate(name)
  define_method(name) do |*|
    raise DeprecatedMethod, "#{name} is removed. See the README for more information"
  end
end

def self.evaluate(gemfile)
  builder = new
  builder.instance_eval(File.read(gemfile.to_s), gemfile.to_s, 1)
  builder.to_definition
end

def _deprecated_options(options)
  if options.include?(:require_as)
    raise DeprecatedOption, "Please replace :require_as with :require"
  elsif options.include?(:vendored_at)
    raise DeprecatedOption, "Please replace :vendored_at with :path"
  elsif options.include?(:only)
    raise DeprecatedOption, "Please replace :only with :group"
  elsif options.include?(:except)
    raise DeprecatedOption, "The :except option is no longer supported"
  end
end

def _normalize_hash(opts)
  # Cannot modify a hash during an iteration in 1.9
  opts.keys.each do |k|
    next if String === k
    v = opts[k]
    opts.delete(k)
    opts[k.to_s] = v
  end
  opts
end

def _normalize_options(name, version, opts)
  _normalize_hash(opts)
  group = opts.delete("group") || @group
  # Normalize git and path options
  ["git", "path"].each do |type|
    if param = opts[type]
      options = _version?(version) ? opts.merge("name" => name, "version" => version) : opts.dup
      source = send(type, param, options, :prepend => true)
      opts["source"] = source
    end
  end
  opts["source"] ||= @source
  opts["group"] = group
end

def _version?(version)
  version && Gem::Version.new(version) rescue false
end

def gem(name, *args)
  options = Hash === args.last ? args.pop : {}
  version = args.last || ">= 0"
  if group = options[:groups] || options[:group]
    options[:group] = group
  end
  _deprecated_options(options)
  _normalize_options(name, version, options)
  @dependencies << Dependency.new(name, version, options)
end

def git(uri, options = {}, source_options = {}, &blk)
  source Source::Git.new(_normalize_hash(options).merge("uri" => uri)), source_options, &blk
end

def group(*args, &blk)
  old, @group = @group, args
  yield
ensure
  @group = old
end

def initialize
  @source  = nil
  @sources = []
  @dependencies = []
  @group = [:default]
end

def path(path, options = {}, source_options = {}, &blk)
  source Source::Path.new(_normalize_hash(options).merge("path" => Pathname.new(path))), source_options, &blk
end

def source(source, options = {})
  @source = case source
  when :gemcutter, :rubygems, :rubyforge then Source::Rubygems.new("uri" => "http://gemcutter.org")
  when String then Source::Rubygems.new("uri" => source)
  else source
  end
  options[:prepend] ? @sources.unshift(@source) : @sources << @source
  yield if block_given?
  @source
ensure
  @source = nil
end

def to_definition
  Definition.new(@dependencies, @sources)
end