#!/usr/bin/env ruby
# frozen_string_literal: false

require 'cgi'
require 'optparse'
require 'pwn'
require 'yaml'

opts = {}
OptionParser.new do |options|
  options.banner = "USAGE:
    #{$PROGRAM_NAME} [opts]
  "

  options.on('-cCONFIG', '--config=CONFG', '<Required - Black Duck Binary Analysis YAML config>') do |g|
    opts[:config] = g
  end

  options.on('-pID', '--parent-group-id=ID', '<Required - Black Duck Binary Analysis Parent Group ID to Associate with Binary Scan>') do |p|
    opts[:parent_group_id] = p
  end

  options.on('-sFILE', '--scan=FILE', '<Required - File to Scan in Black Duck Binary Analysis>') do |f|
    opts[:target_file] = f
  end

  options.on('-rPATH', '--report=PATH', '<Required - Path to Save Black Duck Binary Analysis Scan Report>') do |r|
    opts[:report_path] = r
  end

  options.on('-q', '--queue-timeout', '<Optional - Duration in Seconds for a File to Remain in Queue Prior to Aborting (Default: 5_400)>') do |q|
    opts[:queue_timeout] = q
  end

  options.on('-a', '--scan-attempts', '<Optional - Number of Attempts to Scan a File if the Scan was Aborted Due to Queue Timeouts or RestClient Exceptions (Default: 3)>') do |a|
    opts[:scan_attempts] = a
  end

  options.on('-S', '--sleep-between-scan-attempts', '<Optional - Seconds to Sleep Between Attempts to Scan a File if the Scan was Aborted Due to Queue Timeouts or RestClient Exceptions (Default: 60)>') do |s|
    opts[:sleep_between_scan_attempts] = s
  end

  options.on('-R', '--report-only', '<Optional - Only Generate a Black Duck Binary Analysis Scan Report for an Existing Scan (Default: false)>') do |o|
    opts[:report_only] = o
  end

  options.on('-tTYPE', '--report-type=TYPE', '<Optional - Black Duck Binary Analysis Scan Report Type csv_libs|csv_vulns|pdf (Default: csv_vulns)>') do |t|
    opts[:report_type] = t
  end

  options.on('-vVERSION', '--version=VERSION', '<Optional - Version to Associate w/ Specific Scan (Default: nil)>') do |v|
    opts[:version] = v
  end
end.parse!

if opts.empty?
  puts `#{$PROGRAM_NAME} --help`
  exit 1
end

abort_total = 1
begin
  pwn_provider = 'ruby-gem'
  pwn_provider = ENV.fetch('PWN_PROVIDER') if ENV.keys.any? { |s| s == 'PWN_PROVIDER' }

  config = opts[:config]
  raise "ERROR: BDBA YAML Config File Not Found: #{config}" unless File.exist?(config)

  yaml_config = YAML.load_file(config, symbolize_names: true)

  token = yaml_config[:token]
  raise "ERROR: BDBA Token Not Found: #{token}" if token.nil?

  parent_group_id = opts[:parent_group_id]
  raise "ERROR: BDBA Parent Group ID Not Provided: #{parent_group_id}" if parent_group_id.nil?

  target_file = opts[:target_file]
  raise "ERROR: BDBA Target File Not Found: #{target_file}" unless File.exist?(target_file)

  report_path = opts[:report_path]
  raise "ERROR: BDBA Report Path Not Provided: #{report_path}" if report_path.nil?

  queue_timeout = opts[:queue_timeout] ||= 5_400

  scan_attempts = opts[:scan_attempts] ||= 3
  sleep_between_scan_attempts = opts[:sleep_between_scan_attempts] ||= 60

  report_only = opts[:report_only] ||= false

  report_type_str = opts[:report_type] ||= 'csv_vulns'
  report_type = report_type_str.to_s.to_sym

  version = opts[:version]

  unless report_only
    puts "Uploading/Scanning: #{target_file}"
    PWN::Plugins::BlackDuckBinaryAnalysis.upload_file(
      token: token,
      file: target_file,
      group_id: parent_group_id,
      version: version
    )
    puts "Scan Attempt #{abort_total} of #{scan_attempts}..."
  end

  scan_progress_resp = {}
  scan_progress_busy_duration = 0
  loop do
    scan_progress_resp = PWN::Plugins::BlackDuckBinaryAnalysis.get_apps_by_group(
      token: token,
      group_id: parent_group_id
    )

    # Break out of infinite loop if status is anything other than 'B' (i.e. 'Busy')
    # Possible status other than 'B' is:
    # 'R' (i.e. 'Ready') or
    # 'F' (i.e. 'Fail')
    break if scan_progress_resp[:products].none? { |p| p[:status] == 'B' } || report_only

    # Cancel queued scan if it's been queued for more than 90 minutes
    if scan_progress_busy_duration > queue_timeout.to_i
      puts "Scan Queued for More than #{queue_timeout} Seconds."
      scan_progress_resp[:products].select { |p| p[:status] == 'B' }.each do |p|
        puts "Abort Queued Scan: #{p[:name]}"
        PWN::Plugins::BlackDuckBinaryAnalysis.abort_product_scan(
          token: token,
          product_id: p[:product_id]
        )
      end

      raise IO::TimeoutError, "ERROR: BDBA Scan Aborted: #{target_file}"
    end

    10.times do
      print '.'
      sleep 1
    end
    scan_progress_busy_duration += 10
  end

  raise 'ERROR: BDBA Scan Failed - Check BDBA Logs for More Info...' if scan_progress_resp[:products].any? { |p| p[:status] == 'F' }

  # Account for rare race condition scenario where get_apps_by_group may need to be called
  # multiple times to find the product
  find_product = nil
  find_product_attempts = scan_attempts
  print 'Looking for Product in Apps by Group...'
  loop do
    # File encoding conducting by synopsis is kinda goofy.
    # The encode space w/ + (which is expected) but dont
    # encode + to %2B (whiich _isn't_ expected)
    target_basename = CGI.unescape_uri_component(File.basename(target_file))

    find_product = scan_progress_resp[:products].find { |p| p[:name] == target_basename }

    break unless find_product.nil?

    find_product_attempts += 1

    raise "ERROR: Cannot Find Product in Apps by Group:\n#{scan_progress_resp}" if find_product_attempts >= scan_attempts

    10.times do
      print '.'
      sleep 1
    end

    scan_progress_resp = PWN::Plugins::BlackDuckBinaryAnalysis.get_apps_by_group(
      token: token,
      group_id: parent_group_id
    )
  end
  puts 'complete.'

  product_id = find_product[:product_id]

  scan_report_resp = PWN::Plugins::BlackDuckBinaryAnalysis.generate_product_report(
    token: token,
    product_id: product_id,
    type: report_type,
    output_path: report_path
  )

  puts "\nReport Saved to: #{report_path}"
rescue IO::TimeoutError,
       RestClient::BadGateway,
       RestClient::BadRequest,
       RestClient::Exceptions::OpenTimeout,
       RestClient::Forbidden,
       RestClient::GatewayTimeout,
       RestClient::InternalServerError,
       RestClient::ResourceNotFound,
       RestClient::ServiceUnavailable,
       RestClient::Unauthorized

  abort_total += 1

  if abort_total <= scan_attempts.to_i
    puts 'Sleeping for 60 Seconds and Retrying...'
    sleep sleep_between_scan_attempts.to_i
    retry
  end

  puts 'Scan Attempts Reached - Goodbye.'
  exit 1
rescue SystemExit, Interrupt
  puts "\nGoodbye."
rescue StandardError => e
  raise e
end