class Bundler::Settings

def [](key)
  key = key_for(key)
  @local_config[key] || ENV[key] || @global_config[key]
end

def []=(key, value)
  set_key(key, value, @local_config, local_config_file)
end

def all
  env_keys = ENV.keys.select { |k| k =~ /BUNDLE_.*/ }
  keys = @global_config.keys | @local_config.keys | env_keys
  keys.map do |key|
    key.sub(/^BUNDLE_/, '').gsub(/__/, ".").downcase
  end
end

def allow_sudo?
  !@local_config.key?(key_for(:path))
end

def delete(key)
  @local_config
end

def global_config_file
  file = ENV["BUNDLE_CONFIG"] || File.join(Gem.user_home, ".bundle/config")
  Pathname.new(file)
end

def initialize(root)
  @root   = root
  @local_config = File.exist?(local_config_file) ? YAML.load_file(local_config_file) : {}
  @global_config = File.exist?(global_config_file) ? YAML.load_file(global_config_file) : {}
end

def key_for(key)
  key = key.to_s.sub(".", "__").upcase
  "BUNDLE_#{key}"
end

def local_config_file
  Pathname.new("#{@root}/config")
end

def locations(key)
  locations = {}
  locations[:local]  = @local_config[key] if @local_config.key?(key)
  locations[:env]    = ENV[key] if ENV[key]
  locations[:global] = @global_config[key] if @global_config.key?(key)
  locations
end

def path
  path = ENV[key_for(:path)] || @global_config[key_for(:path)]
  return path if path && !@local_config.key?(key_for(:path))
  if path = self[:path]
    "#{path}/#{Bundler.ruby_scope}"
  else
    Gem.dir
  end
end

def pretty_values_for(exposed_key)
  key = key_for(exposed_key)
  locations = []
  if @local_config.key?(key)
    locations << "Set for your local app (#{local_config_file}): #{@local_config[key].inspect}"
  end
  if value = ENV[key]
    locations << "Set via #{key}: #{value.inspect}"
  end
  if @global_config.key?(key)
    locations << "Set for the current user (#{global_config_file}): #{@global_config[key].inspect}"
  end
  return ["You have not configured a value for `#{exposed_key}`"] if locations.empty?
  locations
end

def set_global(key, value)
  set_key(key, value, @global_config, global_config_file)
end

def set_key(key, value, hash, file)
  key = key_for(key)
  unless hash[key] == value
    hash[key] = value
    hash.delete(key) if value.nil?
    FileUtils.mkdir_p(file.dirname)
    File.open(file, "w") { |f| f.puts hash.to_yaml }
  end
  value
end

def without
  self[:without] ? self[:without].split(":").map { |w| w.to_sym } : []
end

def without=(array)
  unless array.empty?
    self[:without] = array.join(":")
  end
end