require 'multi_json'
require 'ostruct'
require 'capgun/base'
require 'capgun/account'
require 'capgun/estimate'
require 'capgun/job'
require 'capgun/order'
require 'capgun/config'
require 'capgun/connection'
require 'capgun/request'

module Capgun

  # Wrapper for the Capgun REST API
  class Client

    include Capgun::Connection
    include Capgun::Request

    attr_accessor *Config::VALID_OPTIONS_KEYS

    # Initializes a new API object.  Accessor attributes are set based
    # on Capgun::Config::VALID_OPTIONS_KEYS
    #
    # @param [Hash] attrs Addition client attributes.
    # @return [Capgun::Client]
    def initialize(attrs={})
      attrs = Capgun.options.merge(attrs)
      Config::VALID_OPTIONS_KEYS.each do |key|
        instance_variable_set("@#{key}".to_sym, attrs[key])
      end
    end

    # Estimates a capgun job cost / availability.
    #
    # @param [String] url A url that will be captured.
    # @param [Hash] options Additional options to the capture request.
    # @return [Capgun::Estimate] The estimate for the capture request.
    def estimate(url, options = {}, &block)
      options = with_options(options, &block)
      estimate = post("/v1/orders/estimate.json", options.merge(:url => url))
      Capgun::Estimate.new(estimate['order'])
    end

    # Creates a capgun job
    #
    # @param [String] url A url that will be captured.
    # @param [Hash] options Additional options to the capture request.
    # @return [Capgun::Order] The capture request order.
    def capture(url, options = {}, &block)
      options = with_options(options, &block)
      order = post("/v1/orders.json", options.merge(:url => url))
      Capgun::Order.new(order['order'])
    end

    # Query the order
    #
    # @param [String] order_id The id of a previously submitted order.
    # @return [Capgun::Order] The capture order.
    def order(order_id)
      order = get("/v1/orders/#{order_id}.json")
      Capgun::Order.new(order['order'])
    end

    # Query the status of a capture job.
    #
    # @param [String] job_id The id of a previously submitted capture job.
    # @return [Capgun::Job] The capture request is a job that encapsulates status.
    def status(job_id)
      job = get("/v1/jobs/#{job_id}.json")
      Capgun::Job.new(job['job'])
    end

    # Fetch account information
    #
    # @return [Capgun::Account] The account
    def account
      account = get("/v1/account.json")
      Capgun::Account.new(account['account'])
    end

    private

    def with_options(options, &block)
      if block_given?
        options = OpenStruct.new(options)
        yield(options)
        options = options.marshal_dump
      end
      options
    end

  end

end