class Bombuilder

# File lib/bom_builder.rb, line 13
def self.build(path)
  original_working_directory = Dir.pwd
  setup(path)
  specs_list
  bom = build_bom(@gems)

  begin
    @logger.info("Changing directory to the original working directory located at #{original_working_directory}")
    Dir.chdir original_working_directory
  rescue => e
    @logger.error("Unable to change directory the original working directory located at #{original_working_directory}. #{e.message}: #{e.backtrace.join('\n')}")
    abort
  end

  bom_directory = File.dirname(@bom_file_path)
  begin
    FileUtils.mkdir_p(bom_directory) unless File.directory?(bom_directory)
  rescue => e
    @logger.error("Unable to create the directory to hold the BOM output at #{@bom_directory}. #{e.message}: #{e.backtrace.join('\n')}")
    abort
  end

  begin
    @logger.info("Writing BOM to #{@bom_file_path}...")
    File.open(@bom_file_path, "w") {|file| file.write(bom)}

    if @options[:verbose]
      @logger.info("#{@gems.size} gems were written to BOM located at #{@bom_file_path}")
    else
      puts "#{@gems.size} gems were written to BOM located at #{@bom_file_path}"
    end
  rescue => e
    @logger.error("Unable to write BOM to #{@bom_file_path}. #{e.message}: #{e.backtrace.join('\n')}")
    abort
  end
end

# File lib/bom_builder.rb, line 50
def self.setup(path)
  @options = {}
  OptionParser.new do |opts|
    opts.banner = "Usage: cyclonedx-ruby [options]"
  
    opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
      @options[:verbose] = v
    end
    opts.on("-p", "--path path", "(Required) Path to Ruby project directory") do |path|
      @options[:path] = path
    end
    opts.on("-o", "--output bom_file_path", "(Optional) Path to output the bom.xml file to") do |bom_file_path|
      @options[:bom_file_path] = bom_file_path
    end
    opts.on_tail("-h", "--help", "Show help message") do
      puts opts
      exit
    end
  end.parse!

  @logger = Logger.new(STDOUT)
  if @options[:verbose]
    @logger.level = Logger::INFO
  else
    @logger.level = Logger::ERROR
  end

  @gems = []
  licenses_file = File.read "#{__dir__}/licenses.json"
  @licenses_list = JSON.parse(licenses_file)

  if @options[:path].nil?
    @logger.error("missing path to project directory")
    abort
  end

  if !File.directory?(@options[:path])
    @logger.error("path provided is not a valid directory. path provided was: #{@options[:path]}")
    abort
  end

  begin
    @logger.info("Changing directory to Ruby project directory located at #{@options[:path]}")
    Dir.chdir @options[:path]
  rescue => e
    @logger.error("Unable to change directory to Ruby project directory located at #{@options[:path]}. #{e.message}: #{e.backtrace.join('\n')}")
    abort
  end

  if @options[:bom_file_path].nil?
    @bom_file_path = "./bom.xml"
  else
    @bom_file_path = @options[:bom_file_path]
  end

  @logger.info("BOM will be written to #{@bom_file_path}")

  begin
    gemfile_path = @options[:path] + "/" + "Gemfile.lock"
    @logger.info("Parsing specs from #{gemfile_path}...")
    gemfile_contents = File.read(gemfile_path)
    @specs = Bundler::LockfileParser.new(gemfile_contents).specs
    @logger.info("Specs successfully parsed!")
  rescue => e
    @logger.error("Unable to parse specs from #{gemfile_path}. #{e.message}: #{e.backtrace.join('\n')}")
    abort
  end
end

# File lib/bom_builder.rb, line 119
def self.specs_list
  count = 0
  @specs.each do |dependency|
    object = OpenStruct.new
    object.name = dependency.name 
    object.version = dependency.version 
    object.purl = purl(object.name, object.version)
    gem = get_gem(object.name, object.version)
    next if gem.nil?
    
    if gem["licenses"] and gem["licenses"].length > 0
      if @licenses_list.include? gem["licenses"].first
        object.license_id = gem["licenses"].first
      else
        object.license_name = gem["licenses"].first
      end
    end

    object.author = gem["authors"]
    object.description = gem["summary"] 
    object.hash = gem["sha"]
    @gems.push(object)
    count += 1
    @logger.info("#{object.name}:#{object.version} gem added")
  end
end