require 'helix_versioning_engine/change_service'

module GitFusion
  #
  # namespace for functions supporting git-fusion api
  #
  module Util
    include HelixVersioningEngine

    # Messages back to client
    REPO_INITIALISED = 'Repository already initialised'
    PATCH_PARAMS_DONT_EXIST = 'Chosen repo configuration' \
      'p4gf_file does not have all of the specified parameters'
    KEY_ALREADY_EXISTS = 'Key under this name already uploaded, ' \
      'choose a different name'
    USER_NOT_MATCHING = 'User is authenticated, ' \
      'but not authorised to view the requested data.'

    DF_MATCH = %r{\/\/(?<depot>.*)\/users\/(?<user>.*)\/keys\/(?<key_name>.*)$}

    def temp_client
      require_p4_with_temp_client

      [env['p4'], env['hws_settings']]
    end

    def all_keys
      p4, hws_settings = temp_client
      file_list = p4.run_files('-e',
                               "//#{hws_settings.GIT_FUSION_DEPOT}/users/*/...")

      file_list.map do |file|
        data = file['depotFile'].match(DF_MATCH)
        { 'key_name' => GitFusionStrings.decode(data['key_name']),
          'user' => data['user'],
          'key' => print_result(file['depotFile'], p4: p4) }
      end
    end

    def keys_for_user(user)
      keys = all_keys.select { |key| key['user'] == user }
      keys
    end

    def check_if_key_exists(key)
      keys = all_keys
      keys.any? { |h| h['key'] == key }
    end

    def check_if_key_name_exists(key, user)
      keys = all_keys
      keys.any? { |h| h['key_name'] == key && h['user'] == user }
    end

    def get_by_key(key, value)
      val = all_keys.select { |record| record['key'] == key }
      val.first.nil? ? '' : val.first[value]
    end

    def self.error?(p4)
      !p4.errors.empty?
    end

    def to_message(message)
      {
        MessageCode: 0,
        MessageSeverity: 3,
        MessageText: message
      }
    end

    def error_and_clean_up(error)
      halt 400, to_message(error).to_json
    end

    def print_result(file_location, p4: nil)
      p4 = temp_client.first unless p4

      file_result = p4.run_print(file_location)
      content = ''.b
      file_result.drop(1).each do |result|
        content << result if result
      end
      content
    end

    def decode_from_uri(*args)
      args.map do |a|
        HWSStrings.component_decode(a, '%', GitFusionStrings::URI_RESERVED_CHARACTERS)
      end
    end

    def encode_to_gf_format(*args)
      args.map do |a|
        GitFusionStrings.encode(a)
      end
    end

    def submit_file(p4, file_path, file_content, description)
      files = [
        ChangeService::File.new(depot_file: file_path,
                                action: 'upload',
                                content: file_content)
      ]

      change_service = ChangeService.new(p4: p4,
                                         client_root: env['p4_root'],
                                         client_name: p4.client)

      change_service.submit(files: files,
                            description: description)
    end
  end
end