require 'fileutils'
require 'yaml'
require 'ostruct'
require 'quandl/support/attributes'

module Quandl
module Command
class Config
  
  include Quandl::Support::Attributes
  
  define_attributes :token, :quandl_url, :last_checked_for_update, :output_format, :send_crash_reports, :stdout, :stderr
  
  attr_accessor :options

  def initialize(opts={})
    self.options = opts.symbolize_keys
    convert_legacy_config
    ensure_directory_is_present
    @attributes = read_config_from_file.stringify_keys
  end
  
  def stdout
    options[:stdout] || read_attribute(:stdout)
  end
  
  def stderr
    options[:stderr] || read_attribute(:stderr)
  end
  
  def quandl_url
    return @quandl_url if @quandl_url.present?
    @quandl_url = options[:url] if options[:url].present?
    @quandl_url = ENV['QUANDL_URL'] if @quandl_url.blank?
    @quandl_url = read_attribute(:quandl_url) if @quandl_url.blank?
    @quandl_url = 'http://quandl.com/api/' if @quandl_url.blank?
    @quandl_url
  end
  
  def auth_token
    return @auth_token if @auth_token.present?
    @auth_token = options[:token] if options[:token].present?
    @auth_token = ENV['QUANDL_TOKEN'] if @auth_token.blank?
    @auth_token = read_attribute(:token) if @auth_token.blank?
    @auth_token
  end

  def request_platform
    'sandbox' if options[:sandbox].present?
  end
  
  def file_path
    options[:file_path]
  end
  
  def file_dir
    File.dirname(file_path)
  end
  
  private
  
  def ensure_directory_is_present
    return if File.exists?(file_path)
    FileUtils.mkdir(file_dir) unless Dir.exists?(file_dir)
    File.write( file_path, YAML.dump({}) )
  end
  
  def convert_legacy_config
    return if File.directory?(file_dir) || !File.exists?(file_dir)
    # otherwise move the old .quandl into .quandl/config
    FileUtils.mv(file_dir, "#{file_dir}.old")
    FileUtils.mkdir(file_dir)
    token = File.read("#{file_dir}.old")
    File.write(file_path, "token: #{token}")
  end
  
  def write_attribute(*args)
    super(*args)
    write_config_to_file
  end
  
  def read_config_from_file
    YAML.load(File.read(file_path))
  end
  
  def write_config_to_file
    File.write( file_path, YAML.dump(attributes) )
  end
  
end
end
end