module Fastlane
  module Actions
    module SharedValues
      LATEST_BUILD_NUMBER = :LATEST_BUILD_NUMBER
    end

    class AppStoreBuildNumberAction < Action
      def self.run(params)
        require 'spaceship'

        UI.message("Login to iTunes Connect (#{params[:username]})")
        Spaceship::Tunes.login(params[:username])
        Spaceship::Tunes.select_team
        UI.message("Login successful")

        app = Spaceship::Tunes::Application.find(params[:app_identifier])
        if params[:live]
          UI.message("Fetching the latest build number for live-version")
          build_nr = app.live_version.current_build_number
        else
          version_number = params[:version]
          unless version_number
            # Automatically fetch the latest version in testflight
            begin
              testflight_version = app.build_trains.keys.last
            rescue
              testflight_version = params[:version]
            end

            if testflight_version
              version_number = testflight_version
            else
              version_number = UI.input("You have to specify a new version number, as there are multiple to choose from")
            end

          end

          UI.message("Fetching the latest build number for version #{version_number}")

          begin
            train = app.build_trains[version_number]
            build_nr = train.builds.map(&:build_version).map(&:to_i).sort.last
          rescue
            UI.user_error!("could not find a build on iTC - and 'initial_build_number' option is not set") unless params[:initial_build_number]
            build_nr = params[:initial_build_number]
          end
        end
        UI.message("Latest upload is build number: #{build_nr}")
        Actions.lane_context[SharedValues::LATEST_BUILD_NUMBER] = build_nr
      end

      #####################################################
      # @!group Documentation
      #####################################################

      def self.description
        "Returns the current build_number of either live or edit version"
      end

      def self.available_options
        user = CredentialsManager::AppfileConfig.try_fetch_value(:itunes_connect_id)
        user ||= CredentialsManager::AppfileConfig.try_fetch_value(:apple_id)
        [
          FastlaneCore::ConfigItem.new(key: :initial_build_number,
                                       env_name: "INITIAL_BUILD_NUMBER",
                                       description: "sets the build number to given value if no build is in current train",
                                       default_value: 1,
                                       is_string: false),
          FastlaneCore::ConfigItem.new(key: :app_identifier,
                                       short_option: "-a",
                                       env_name: "FASTLANE_APP_IDENTIFIER",
                                       description: "The bundle identifier of your app",
                                       default_value: CredentialsManager::AppfileConfig.try_fetch_value(:app_identifier)),
          FastlaneCore::ConfigItem.new(key: :username,
                                       short_option: "-u",
                                       env_name: "ITUNESCONNECT_USER",
                                       description: "Your Apple ID Username",
                                       default_value: user),
          FastlaneCore::ConfigItem.new(key: :team_id,
                                       short_option: "-k",
                                       env_name: "APPSTORE_BUILD_NUMBER_LIVE_TEAM_ID",
                                       description: "The ID of your iTunes Connect team if you're in multiple teams",
                                       optional: true,
                                       is_string: false, # as we also allow integers, which we convert to strings anyway
                                       default_value: CredentialsManager::AppfileConfig.try_fetch_value(:itc_team_id),
                                       verify_block: proc do |value|
                                         ENV["FASTLANE_ITC_TEAM_ID"] = value.to_s
                                       end),
          FastlaneCore::ConfigItem.new(key: :live,
                                       short_option: "-l",
                                       env_name: "APPSTORE_BUILD_NUMBER_LIVE",
                                       description: "Query the live version (ready-for-sale)",
                                       optional: true,
                                       is_string: false,
                                       default_value: true),
          FastlaneCore::ConfigItem.new(key: :version,
                                       env_name: "LATEST_VERSION",
                                       description: "The version number whose latest build number we want",
                                       optional: true),
          FastlaneCore::ConfigItem.new(key: :team_name,
                                       short_option: "-e",
                                       env_name: "LATEST_TESTFLIGHT_BUILD_NUMBER_TEAM_NAME",
                                       description: "The name of your iTunes Connect team if you're in multiple teams",
                                       optional: true,
                                       default_value: CredentialsManager::AppfileConfig.try_fetch_value(:itc_team_name),
                                       verify_block: proc do |value|
                                         ENV["FASTLANE_ITC_TEAM_NAME"] = value.to_s
                                       end)
        ]
      end

      def self.output
        [
          ['LATEST_BUILD_NUMBER', 'The latest build number of either live or testflight version']
        ]
      end

      def self.details
        "Returns the current build number of either the live or testflight version - it is useful for getting the build_number of the current or ready-for-sale app version, and it also works on non-live testflight version. If you need to handle more build-trains please see `latest_testflight_build_number`"
      end

      def self.example_code
        [
          'app_store_build_number',
          'app_store_build_number(
            app_identifier: "app.identifier",
            username: "user@host.com"
          )',
          'app_store_build_number(
            live: false,
            app_identifier: "app.identifier",
            version: "1.2.9"
          )'
        ]
      end

      def self.authors
        ["hjanuschka"]
      end

      def self.category
        :misc
      end

      def self.is_supported?(platform)
        [:ios, :mac].include?(platform)
      end
    end
  end
end