class CertificateParser

# File lib/certutil/certificate_parser.rb, line 59
def initialize(attrs = {})
  @input = attrs[:string]
  @name = attrs[:name]
  @path = Dir.pwd
  info "Certificate loaded#{' from ' + attrs[:source].to_s if attrs[:source]}: #{@name}."
end

# File lib/certutil/certificate_parser.rb, line 12
def self.new_from_file(path)
  # should return nil if it's not a valid cert

  debug "Parsing #{path}..."
  begin
    string = File.read(path)
    if string
      path_array = path.split(File::SEPARATOR)
      debug "Creating..."
      self.new(string: string, name: path_array.last.gsub(/(\.crt)|(.pem)/, ""), source: :file)
    end
  rescue 
    nil
  end
end

# File lib/certutil/certificate_parser.rb, line 35
def self.new_from_gist(gist_link)
  # not yet
end

# File lib/certutil/certificate_parser.rb, line 28
def self.new_from_hostname(hostname)
  debug "Fetching certificate from #{hostname}..."
  debug "Creating..."
  string = `openssl s_client -connect #{hostname}:443 -showcerts </dev/null`
  self.new(string: string, name: hostname, source: :hostname) unless string == ""
end

# File lib/certutil/certificate_parser.rb, line 8
def self.new_from_input(input)
  new_from_file(File.expand_path(input)) || new_from_hostname(input)
end

# File lib/certutil/certificate_parser.rb, line 39
def self.new_from_string(string, opts = {})
  self.new(string: string, name: (opts[:name] || "temp"))
end

# File lib/certutil/certificate_parser.rb, line 43
def certs
  @certs ||= split_input
end

# File lib/certutil/certificate_parser.rb, line 51
def decoded
  debug "lazy loading decoded..."
  @decoded ||= decode
  debug "lazy loading done."

  @decoded
end

# File lib/certutil/certificate_parser.rb, line 47
def flipit!
  @certs = certs.reverse
end

# File lib/certutil/certificate_parser.rb, line 75
def write_crt_file!
  info "Writing .crt file..."
  joined = certs.join("\n") + "\n"
  File.open(File.join(@path, "#{@name}.crt"), "w") { |f| f.write(joined) }
  debug "--> Wrote #{@path} -- #{@name}.crt."
end

# File lib/certutil/certificate_parser.rb, line 66
def write_crt_files!
  info "Writing separate .crt files..."
  certs.each_with_index do |cert, i|
    debug "right now, wd is #{Dir.pwd}"
    File.open(File.join(@path, "#{@name}-#{i}.crt"), "w") { |f| f.write(cert) }
    debug "--> Wrote #{@path} -- #{@name}-#{i}.crt."
  end
end

# File lib/certutil/certificate_parser.rb, line 90
def write_txt_file!
  info "Writing .txt file..."
  joined = decoded.join("\n-----\n") + "\n"
  File.open(File.join(@path, "#{@name}-decoded.txt"), "w") { |f| f.write(joined) }
  debug "--> Wrote #{@path}/#{@name}-decoded.txt."
end

# File lib/certutil/certificate_parser.rb, line 82
def write_txt_files!
  info "Writing separate .txt files..."
  decoded.each_with_index do |cert, i|
    File.open(File.join(@path, "#{@name}-#{i}-decoded.txt"), "w") { |f| f.write(cert) }
    debug "--> Wrote #{@path}/#{@name}-#{i}-decoded.txt."
  end
end

# File lib/certutil/certificate_parser.rb, line 113
def decode
  debug "Decoding..."
  output = self.certs.map do |cert|
    Open3.popen3("openssl x509 -text -noout") do |stdin, stdout, stderr|
      stdin.write(cert)
      stdin.close_write
      out = stdout.read
      debug "stdout: #{out}"
      out
    end
  end

  debug "decode output is #{output}."
  output
end

# File lib/certutil/certificate_parser.rb, line 99
def split_input
  debug "splitting..."
  matches = @input.scan(/-+BEGIN CERTIFICATE-----.*?-+END CERTIFICATE-+/m)
  matches = matches.map do |cert|
    # cert.gsub!(/-----BEGIN CERTIFICATE-----\n?/, "")
    # cert.gsub!(/-----END CERTIFICATE-----\n?/, "")
    # cert.chomp
    cert
  end

  debug "Found #{matches.count} matches."
  matches
end