class Configly

# File lib/configly.rb, line 15
def <<(source)
  source = "#{source}.yml" unless source =~ /\.ya?ml$/
  content = File.read source
  content = YAML.load(ERB.new(content).result).to_configly

  merge! content if content
end

# File lib/configly.rb, line 11
def [](key)
  super key.to_sym
end

# File lib/configly.rb, line 6
def []=(key, value)
  raise KeyError.new("Reserved key: #{key}") if respond_to? key
  super key.to_sym, coerce_value(value)
end

# File lib/configly.rb, line 24
def method_missing(method, *args, &block)
  key = method
  string_key = key.to_s
  return self[key] if has_key? key

  suffix = nil

  if string_key.end_with? *['=', '!', '?']
    suffix = string_key[-1]
    key = string_key[0..-2].to_sym
  end

  case suffix
  when "="
    val = args.first
    val = val.to_configly if val.is_a? Hash
    self[key] = val

  when "?"
    has_key?(key) and !(self[key].is_a?(Configly) and self[key].empty?)

  when "!"
    (has_key?(key) and !(self[key].is_a?(Configly) and self[key].empty?)) ? 
      self[key] : nil

  else
    self[key] = self.class.new

  end

end

# File lib/configly.rb, line 58
def coerce_value(value)
  case value
  when Configly
    value
  when Hash
    value = value.to_configly
  when Array
    value.map { |v| coerce_value v }
  else
    value
  end
end