require 'json'
require 'rest_client'
module ADNAuthorize
  class Authorize
    def initialize
      @auth_url = "https://account.app.net/oauth/authenticate?client_id=#{TokiCLI::Toki::CLIENT_ID}&response_type=token&redirect_uri=#{TokiCLI::Toki::CALLBACK_URL}&scope=basic,messages&include_marker=1"
      @home = Dir.home + "/.TokiCLI"
    end

    def authorize
      puts "\e[H\e[2J"
      old = Dir.home + '/.toki_token'
      if File.exist?(old)
        puts "The old authorization token isn't valid anymore: the file '#{old}' has been deleted.\n\n"
        File.delete(old)
      end
      show_link
      token = get_token
      check_token(token)
      puts "\n\nThanks! Contacting App.net...\n\n"
      user = create_user_data(token, @home)
      puts "Creating TokiCLI folder in '#{user.home_path}' ...\n\n"
      Dir.mkdir("#{user.home_path}") unless Dir.exist?("#{user.home_path}")
      puts "Saving user token...\n\n"
      create_token_file(user)
      puts "Done!\n\n"
    end

    private

    def create_token_file(user)
      data = {
        token: user.token,
        id: user.id,
        username: user.username,
        handle: user.handle,
        home: user.home_path
      }
      File.write("#{user.home_path}/config.json", data.to_json)
    end

    def show_link
      puts "\nPlease click this URL, or copy/paste it in a browser:\n\n"
      puts @auth_url
      puts "\n"
      puts "then log in with your ADN credentials to authorize TokiCLI.\n\n"
      puts "You will then be redirected to a page showing a 'user token'.\n\n"
      puts "Copy the token then paste it here:\n"
      print "> "
    end

    def get_token
      STDIN.gets.chomp()
    end

    def check_token(token)
      if token.empty? || token.nil?
        puts "\n\nOops, something went wrong, I couldn't get the token. Please try again.\n\n"
        exit
      end
    end

    def create_user_data(token, home_path)
      resp = get_user(token)
      model = Struct.new(:resp, :username, :id, :handle, :home_path, :token)
      username = resp['data']['username']
      model.new(resp, username, resp['data']['id'], "@" + username, home_path, token)
    end

    def get_user(token)
      JSON.parse(RestClient.get("https://api.app.net/users/me?access_token=#{token}", :verify_ssl => OpenSSL::SSL::VERIFY_NONE) {|response, request, result| response })
    end

  end
end