class OAuth2::AccessToken

def [](key)
  @params[key]
end

def delete(path, params={}, headers={})
  request(:delete, path, params, headers)
end

def expired?
  expires? && expires_at < Time.now
end

def expires?
  !!@expires_in
end

def get(path, params={}, headers={})
  request(:get, path, params, headers)
end

def initialize(client, token, refresh_token=nil, expires_in=nil, params={})
  @client = client
  @token = token.to_s
  @refresh_token = refresh_token.to_s
  @expires_in = (expires_in.nil? || expires_in == '') ? nil : expires_in.to_i
  @expires_at = Time.now + @expires_in if @expires_in
  @params = params
  @token_param = 'oauth_token'
end

def post(path, params={}, headers={})
  request(:post, path, params, headers)
end

def put(path, params={}, headers={})
  request(:put, path, params, headers)
end

def request(verb, path, params={}, headers={})
  if params.instance_of?(Hash)
    params = params.merge token_param => @token
  end
  headers = headers.merge 'Authorization' => "OAuth #{@token}"
  @client.request(verb, path, params, headers)
end