class KPM::NexusFacade::NexusApiCallsV2

def build_http
  uri = URI.parse(configuration[:url])
  http = Net::HTTP.new(uri.host, uri.port)
  http.open_timeout = configuration[:open_timeout] || OPEN_TIMEOUT_DEFAULT # seconds
  http.read_timeout = configuration[:read_timeout] || READ_TIMEOUT_DEFAULT # seconds
  http.use_ssl = (ssl_verify != false)
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE unless ssl_verify
  logger.debug { "HTTP connection: #{http.inspect}" }
  http
end

def build_query_params(coordinates, what_parameters = nil)
  artifact = parse_coordinates(coordinates)
  @version = artifact[:version].to_s.upcase
  query = { g: artifact[:group_id], a: artifact[:artifact_id], e: artifact[:extension], v: version, r: configuration[:repository] }
  query.merge!(c: artifact[:classifier]) unless artifact[:classifier].nil?
  params = what_parameters.nil? ? query : {}
  what_parameters.each { |key| params[key] = query[key] unless query[key].nil? } unless what_parameters.nil?
  params.map { |key, value| "#{key}=#{value}" }.join('&')
end

def endpoint_with_params(endpoint, query_params)
  "#{endpoint}?#{URI::DEFAULT_PARSER.escape(query_params)}"
end

def get_artifact_info(coordinates)
  get_response_with_retries(coordinates, get_artifact_info_endpoint(coordinates), nil)
end

def get_artifact_info_endpoint(_coordinates)
  '/service/local/artifact/maven/resolve'
end

def get_file_name(coordinates)
  artifact = parse_coordinates(coordinates)
  artifact[:version] = REXML::Document.new(get_artifact_info(coordinates)).elements['//version'].text if artifact[:version].casecmp('latest')
  if artifact[:classifier].nil?
    "#{artifact[:artifact_id]}-#{artifact[:version]}.#{artifact[:extension]}"
  else
    "#{artifact[:artifact_id]}-#{artifact[:version]}-#{artifact[:classifier]}.#{artifact[:extension]}"
  end
end

def get_raw_response_with_retries(location)
  response = Net::HTTP.get_response(URI(location))
  logger.debug { "Response body: #{response.body}" }
  process_response_with_retries(response)
end

def get_response(coordinates, endpoint, what_parameters)
  http = build_http
  query_params = build_query_params(coordinates, what_parameters) unless coordinates.nil?
  endpoint = endpoint_with_params(endpoint, query_params) unless coordinates.nil?
  request = Net::HTTP::Get.new(endpoint)
  if configuration.key?(:username) && configuration.key?(:password)
    request.basic_auth(configuration[:username], configuration[:password])
  elsif configuration.key?(:token)
    request['Authorization'] = "token #{configuration[:token]}"
  end
  logger.debug do
    http.set_debug_output(logger)
    "HTTP path: #{endpoint}"
  end
  http.request(request)
end

def get_response_with_retries(coordinates, endpoint, what_parameters)
  logger.debug { "Fetching coordinates=#{coordinates}, endpoint=#{endpoint}, params=#{what_parameters}" }
  response = get_response(coordinates, endpoint, what_parameters)
  logger.debug { "Response body: #{response.body}" }
  process_response_with_retries(response)
end

def initialize(configuration, ssl_verify, logger)
  @configuration = configuration
  @ssl_verify = ssl_verify
  @logger = logger
end

def parse_coordinates(coordinates)
  raise ArtifactMalformedException if coordinates.nil?
  split_coordinates = coordinates.split(':')
  raise ArtifactMalformedException if split_coordinates.empty? || (split_coordinates.size > 5)
  artifact = {}
  artifact[:group_id] = split_coordinates[0]
  artifact[:artifact_id] = split_coordinates[1]
  artifact[:extension] = split_coordinates.size > 3 ? split_coordinates[2] : 'jar'
  artifact[:classifier] = split_coordinates.size > 4 ? split_coordinates[3] : nil
  artifact[:version] = split_coordinates[-1]
  artifact[:version].upcase! if version == 'latest'
  artifact
end

def process_response_with_retries(response)
  case response.code
  when '200'
    response.body
  when '301', '307'
    location = response['Location']
    logger.debug { "Following redirect to #{location}" }
    new_path = location.gsub!(configuration[:url], '')
    if new_path.nil?
      # Redirect to another domain (e.g. CDN)
      get_raw_response_with_retries(location)
    else
      get_response_with_retries(nil, location, nil)
    end
  when '404'
    raise StandardError, ERROR_MESSAGE_404
  else
    raise UnexpectedStatusCodeException, response.code
  end
end

def pull_artifact(coordinates, destination)
  file_name = get_file_name(coordinates)
  destination = File.join(File.expand_path(destination || '.'), file_name)
  logger.debug { "Downloading to destination: #{destination}" }
  File.open(destination, 'wb') do |io|
    io.write(get_response_with_retries(coordinates, pull_artifact_endpoint(coordinates), nil))
  end
  {
    file_name: file_name,
    file_path: File.expand_path(destination),
    version: version,
    size: File.size(File.expand_path(destination))
  }
end

def pull_artifact_endpoint(_coordinates)
  '/service/local/artifact/maven/redirect'
end

def search_for_artifact_endpoint(_coordinates)
  '/service/local/lucene/search'
end

def search_for_artifacts(coordinates)
  logger.debug "Entered - Search for artifact, coordinates: #{coordinates}"
  response = get_response(coordinates, search_for_artifact_endpoint(coordinates), %i[g a])
  case response.code
  when '200'
    logger.debug "response body: #{response.body}"
    response.body
  when '404'
    raise StandardError, ERROR_MESSAGE_404
  else
    raise UnexpectedStatusCodeException, response.code
  end
end