class URI::Generic

# File uri/generic.rb, line 116
def self.build(args)
  if args.kind_of?(Array) &&
      args.size == ::URI::Generic::COMPONENT.size
    tmp = args.dup
  elsif args.kind_of?(Hash)
    tmp = ::URI::Generic::COMPONENT.collect do |c|
      if args.include?(c)
        args[c]
      else
        nil
      end
    end
  else
    component = self.class.component rescue ::URI::Generic::COMPONENT
    raise ArgumentError,
    "expected Array of or Hash of components of #{self.class} (#{component.join(', ')})"
  end

  tmp << nil
  tmp << true
  return self.new(*tmp)
end

# File uri/generic.rb, line 78
def self.build2(args)
  begin
    return self.build(args)
  rescue InvalidComponentError
    if args.kind_of?(Array)
      return self.build(args.collect{|x|
        if x.is_a?(String)
          DEFAULT_PARSER.escape(x)
        else
          x
        end
      })
    elsif args.kind_of?(Hash)
      tmp = {}
      args.each do |key, value|
        tmp[key] = if value
            DEFAULT_PARSER.escape(value)
          else
            value
          end
      end
      return self.build(tmp)
    end
  end
end

# File uri/generic.rb, line 57
def self.component
  self::COMPONENT
end

# File uri/generic.rb, line 32
def self.default_port
  self::DEFAULT_PORT
end

# File uri/generic.rb, line 169
def initialize(scheme,
               userinfo, host, port, registry,
               path, opaque,
               query,
               fragment,
               parser = DEFAULT_PARSER,
               arg_check = false)
  @scheme = nil
  @user = nil
  @password = nil
  @host = nil
  @port = nil
  @path = nil
  @query = nil
  @opaque = nil
  @fragment = nil
  @parser = parser == DEFAULT_PARSER ? nil : parser

  if arg_check
    self.scheme = scheme
    self.userinfo = userinfo
    self.hostname = host
    self.port = port
    self.path = path
    self.query = query
    self.opaque = opaque
    self.fragment = fragment
  else
    self.set_scheme(scheme)
    self.set_userinfo(userinfo)
    self.set_host(host)
    self.set_port(port)
    self.set_path(path)
    self.query = query
    self.set_opaque(opaque)
    self.fragment=(fragment)
  end
  if registry
    raise InvalidURIError,
      "the scheme #{@scheme} does not accept registry part: #{registry} (or bad hostname?)"
  end

  @scheme&.freeze
  self.set_path('') if !@path && !@opaque # (see RFC2396 Section 5.2)
  self.set_port(self.default_port) if self.default_port && !@port
end

# File uri/generic.rb, line 1373
def ==(oth)
  if self.class == oth.class
    self.normalize.component_ary == oth.normalize.component_ary
  else
    false
  end
end

# File uri/generic.rb, line 962
def absolute?
  if @scheme
    true
  else
    false
  end
end

# File uri/generic.rb, line 1463
def coerce(oth)
  case oth
  when String
    oth = parser.parse(oth)
  else
    super
  end

  return oth, self
end

# File uri/generic.rb, line 313
def component
  self.class.component
end

# File uri/generic.rb, line 39
def default_port
  self.class.default_port
end

# File uri/generic.rb, line 1385
def eql?(oth)
  self.class == oth.class &&
  parser == oth.parser &&
  self.component_ary.eql?(oth.component_ary)
end

# File uri/generic.rb, line 1489
def find_proxy(env=ENV)
  raise BadURIError, "relative URI: #{self}" if self.relative?
  name = self.scheme.downcase + '_proxy'
  proxy_uri = nil
  if name == 'http_proxy' && env.include?('REQUEST_METHOD') # CGI?
    # HTTP_PROXY conflicts with *_proxy for proxy settings and
    # HTTP_* for header information in CGI.
    # So it should be careful to use it.
    pairs = env.reject {|k, v| /\Ahttp_proxy\z/i !~ k }
    case pairs.length
    when 0 # no proxy setting anyway.
      proxy_uri = nil
    when 1
      k, _ = pairs.shift
      if k == 'http_proxy' && env[k.upcase] == nil
        # http_proxy is safe to use because ENV is case sensitive.
        proxy_uri = env[name]
      else
        proxy_uri = nil
      end
    else # http_proxy is safe to use because ENV is case sensitive.
      proxy_uri = env.to_hash[name]
    end
    if !proxy_uri
      # Use CGI_HTTP_PROXY.  cf. libwww-perl.
      proxy_uri = env["CGI_#{name.upcase}"]
    end
  elsif name == 'http_proxy'
    unless proxy_uri = env[name]
      if proxy_uri = env[name.upcase]
        warn 'The environment variable HTTP_PROXY is discouraged.  Use http_proxy.', uplevel: 1
      end
    end
  else
    proxy_uri = env[name] || env[name.upcase]
  end

  if proxy_uri.nil? || proxy_uri.empty?
    return nil
  end

  if self.hostname
    begin
      addr = IPSocket.getaddress(self.hostname)
      return nil if /\A127\.|\A::1\z/ =~ addr
    rescue SocketError
    end
  end

  name = 'no_proxy'
  if no_proxy = env[name] || env[name.upcase]
    return nil unless URI::Generic.use_proxy?(self.hostname, addr, self.port, no_proxy)
  end
  URI.parse(proxy_uri)
end

# File uri/generic.rb, line 919
def fragment=(v)
  return @fragment = nil unless v

  x = v.to_str
  v = x.dup if x.equal? v
  v.encode!(Encoding::UTF_8) rescue nil
  v.delete!("\t\r\n")
  v.force_encoding(Encoding::ASCII_8BIT)
  v.gsub!(/(?!%\h\h|[!-~])./n){'%%%02X' % $&.ord}
  v.force_encoding(Encoding::US_ASCII)
  @fragment = v
end

# File uri/generic.rb, line 1381
def hash
  self.component_ary.hash
end

# File uri/generic.rb, line 951
def hierarchical?
  if @path
    true
  else
    false
  end
end

# File uri/generic.rb, line 629
def host=(v)
  check_host(v)
  set_host(v)
  v
end

# File uri/generic.rb, line 644
def hostname
  v = self.host
  /\A\[(.*)\]\z/ =~ v ? $1 : v
end

# File uri/generic.rb, line 661
def hostname=(v)
  v = "[#{v}]" if /\A\[.*\]\z/ !~ v && /:/ =~ v
  self.host = v
end

# File uri/generic.rb, line 1440
def inspect
  "#<#{self.class} #{self}>"
end

# File uri/generic.rb, line 1099
def merge(oth)
  rel = parser.__send__(:convert_to_uri, oth)

  if rel.absolute?
    #raise BadURIError, "both URI are absolute" if absolute?
    # hmm... should return oth for usability?
    return rel
  end

  unless self.absolute?
    raise BadURIError, "both URI are relative"
  end

  base = self.dup

  authority = rel.userinfo || rel.host || rel.port

  # RFC2396, Section 5.2, 2)
  if (rel.path.nil? || rel.path.empty?) && !authority && !rel.query
    base.fragment=(rel.fragment) if rel.fragment
    return base
  end

  base.query = nil
  base.fragment=(nil)

  # RFC2396, Section 5.2, 4)
  if !authority
    base.set_path(merge_path(base.path, rel.path)) if base.path && rel.path
  else
    # RFC2396, Section 5.2, 4)
    base.set_path(rel.path) if rel.path
  end

  # RFC2396, Section 5.2, 7)
  base.set_userinfo(rel.userinfo) if rel.userinfo
  base.set_host(rel.host)         if rel.host
  base.set_port(rel.port)         if rel.port
  base.query = rel.query       if rel.query
  base.fragment=(rel.fragment) if rel.fragment

  return base
end

# File uri/generic.rb, line 1071
def merge!(oth)
  t = merge(oth)
  if self == t
    nil
  else
    replace!(t)
    self
  end
end

# File uri/generic.rb, line 1309
def normalize
  uri = dup
  uri.normalize!
  uri
end

# File uri/generic.rb, line 1318
def normalize!
  if path&.empty?
    set_path('/')
  end
  if scheme && scheme != scheme.downcase
    set_scheme(self.scheme.downcase)
  end
  if host && host != host.downcase
    set_host(self.host.downcase)
  end
end

# File uri/generic.rb, line 891
def opaque=(v)
  check_opaque(v)
  set_opaque(v)
  v
end

# File uri/generic.rb, line 289
def parser
  if !defined?(@parser) || !@parser
    DEFAULT_PARSER
  else
    @parser || DEFAULT_PARSER
  end
end

# File uri/generic.rb, line 573
def password
  @password
end

# File uri/generic.rb, line 498
def password=(password)
  check_password(password)
  set_password(password)
  # returns password
end

# File uri/generic.rb, line 805
def path=(v)
  check_path(v)
  set_path(v)
  v
end

# File uri/generic.rb, line 719
def port=(v)
  check_port(v)
  set_port(v)
  port
end

# File uri/generic.rb, line 829
def query=(v)
  return @query = nil unless v
  raise InvalidURIError, "query conflicts with opaque" if @opaque

  x = v.to_str
  v = x.dup if x.equal? v
  v.encode!(Encoding::UTF_8) rescue nil
  v.delete!("\t\r\n")
  v.force_encoding(Encoding::ASCII_8BIT)
  raise InvalidURIError, "invalid percent escape: #{$1}" if /(%\H\H)/n.match(v)
  v.gsub!(/(?!%\h\h|[!$-&(-;=?-_a-~])./n.freeze){'%%%02X' % $&.ord}
  v.force_encoding(Encoding::US_ASCII)
  @query = v
end

# File uri/generic.rb, line 735
def registry=(v)
  raise InvalidURIError, "can not set registry"
end

# File uri/generic.rb, line 974
def relative?
  !absolute?
end

# File uri/generic.rb, line 1252
def route_from(oth)
  # you can modify `rel', but can not `oth'.
  begin
    oth, rel = route_from0(oth)
  rescue
    raise $!.class, $!.message
  end
  if oth == rel
    return rel
  end

  rel.set_path(route_from_path(oth.path, self.path))
  if rel.path == './' && self.query
    # "./?foo" -> "?foo"
    rel.set_path('')
  end

  return rel
end

# File uri/generic.rb, line 1292
def route_to(oth)
  parser.__send__(:convert_to_uri, oth).route_from(self)
end

# File uri/generic.rb, line 360
def scheme=(v)
  check_scheme(v)
  set_scheme(v)
  v
end

# File uri/generic.rb, line 1429
def select(*components)
  components.collect do |c|
    if component.include?(c)
      self.__send__(c)
    else
      raise ArgumentError,
        "expected of components of #{self.class} (#{self.class.component.join(', ')})"
    end
  end
end

# File uri/generic.rb, line 1333
def to_s
  str = ''.dup
  if @scheme
    str << @scheme
    str << ':'
  end

  if @opaque
    str << @opaque
  else
    if @host || %w[file postgres].include?(@scheme)
      str << '//'
    end
    if self.userinfo
      str << self.userinfo
      str << '@'
    end
    if @host
      str << @host
    end
    if @port && @port != self.default_port
      str << ':'
      str << @port.to_s
    end
    str << @path
    if @query
      str << '?'
      str << @query
    end
  end
  if @fragment
    str << '#'
    str << @fragment
  end
  str
end

# File uri/generic.rb, line 568
def user
  @user
end

# File uri/generic.rb, line 471
def user=(user)
  check_user(user)
  set_user(user)
  # returns user
end

# File uri/generic.rb, line 557
def userinfo
  if @user.nil?
    nil
  elsif @password.nil?
    @user
  else
    @user + ':' + @password
  end
end

# File uri/generic.rb, line 441
def userinfo=(userinfo)
  if userinfo.nil?
    return nil
  end
  check_userinfo(*userinfo)
  set_userinfo(*userinfo)
  # returns userinfo
end

# File uri/generic.rb, line 1405
def component_ary
  component.collect do |x|
    self.__send__(x)
  end
end

# File uri/generic.rb, line 603
def set_host(v)
  @host = v
end

# File uri/generic.rb, line 873
def set_opaque(v)
  @opaque = v
end

# File uri/generic.rb, line 534
def set_password(v)
  @password = v
  # returns v
end

# File uri/generic.rb, line 779
def set_path(v)
  @path = v
end

# File uri/generic.rb, line 692
def set_port(v)
  v = v.empty? ? nil : v.to_i unless !v || v.kind_of?(Integer)
  @port = v
end

# File uri/generic.rb, line 334
def set_scheme(v)
  @scheme = v&.downcase
end

# File uri/generic.rb, line 524
def set_user(v)
  set_userinfo(v, @password)
  v
end

# File uri/generic.rb, line 509
def set_userinfo(user, password = nil)
  unless password
    user, password = split_userinfo(user)
  end
  @user     = user
  @password = password if password

  [@user, @password]
end

# File uri/generic.rb, line 584
def check_host(v)
  return v unless v

  if @opaque
    raise InvalidURIError,
      "can not set host with registry or opaque"
  elsif parser.regexp[:HOST] !~ v
    raise InvalidComponentError,
      "bad component(expected host component): #{v}"
  end

  return true
end

# File uri/generic.rb, line 851
def check_opaque(v)
  return v unless v

  # raise if both hier and opaque are not nil, because:
  # absoluteURI   = scheme ":" ( hier_part | opaque_part )
  # hier_part     = ( net_path | abs_path ) [ "?" query ]
  if @host || @port || @user || @path  # userinfo = @user + ':' + @password
    raise InvalidURIError,
      "can not set opaque with host, port, userinfo or path"
  elsif v && parser.regexp[:OPAQUE] !~ v
    raise InvalidComponentError,
      "bad component(expected opaque component): #{v}"
  end

  return true
end

# File uri/generic.rb, line 417
def check_password(v, user = @user)
  if @opaque
    raise InvalidURIError,
      "can not set password with opaque"
  end
  return v unless v

  if !user
    raise InvalidURIError,
      "password component depends user component"
  end

  if parser.regexp[:USERINFO] !~ v
    raise InvalidComponentError,
      "bad password component"
  end

  return true
end

# File uri/generic.rb, line 747
def check_path(v)
  # raise if both hier and opaque are not nil, because:
  # absoluteURI   = scheme ":" ( hier_part | opaque_part )
  # hier_part     = ( net_path | abs_path ) [ "?" query ]
  if v && @opaque
    raise InvalidURIError,
      "path conflicts with opaque"
  end

  # If scheme is ftp, path may be relative.
  # See RFC 1738 section 3.2.2, and RFC 2396.
  if @scheme && @scheme != "ftp"
    if v && v != '' && parser.regexp[:ABS_PATH] !~ v
      raise InvalidComponentError,
        "bad component(expected absolute path component): #{v}"
    end
  else
    if v && v != '' && parser.regexp[:ABS_PATH] !~ v &&
       parser.regexp[:REL_PATH] !~ v
      raise InvalidComponentError,
        "bad component(expected relative path component): #{v}"
    end
  end

  return true
end

# File uri/generic.rb, line 673
def check_port(v)
  return v unless v

  if @opaque
    raise InvalidURIError,
      "can not set port with registry or opaque"
  elsif !v.kind_of?(Integer) && parser.regexp[:PORT] !~ v
    raise InvalidComponentError,
      "bad component(expected port component): #{v.inspect}"
  end

  return true
end

# File uri/generic.rb, line 320
def check_scheme(v)
  if v && parser.regexp[:SCHEME] !~ v
    raise InvalidComponentError,
      "bad component(expected scheme component): #{v}"
  end

  return true
end

# File uri/generic.rb, line 393
def check_user(v)
  if @opaque
    raise InvalidURIError,
      "can not set user with opaque"
  end

  return v unless v

  if parser.regexp[:USERINFO] !~ v
    raise InvalidComponentError,
      "bad component(expected userinfo component or user component): #{v}"
  end

  return true
end

# File uri/generic.rb, line 375
def check_userinfo(user, password = nil)
  if !password
    user, password = split_userinfo(user)
  end
  check_user(user)
  check_password(password, user)

  return true
end

# File uri/generic.rb, line 551
def escape_userpass(v)
  parser.escape(v, /[@:\/]/o) # RFC 1738 section 3.1 #/
end

# File uri/generic.rb, line 990
def merge_path(base, rel)

  # RFC2396, Section 5.2, 5)
  # RFC2396, Section 5.2, 6)
  base_path = split_path(base)
  rel_path  = split_path(rel)

  # RFC2396, Section 5.2, 6), a)
  base_path << '' if base_path.last == '..'
  while i = base_path.index('..')
    base_path.slice!(i - 1, 2)
  end

  if (first = rel_path.first) and first.empty?
    base_path.clear
    rel_path.shift
  end

  # RFC2396, Section 5.2, 6), c)
  # RFC2396, Section 5.2, 6), d)
  rel_path.push('') if rel_path.last == '.' || rel_path.last == '..'
  rel_path.delete('.')

  # RFC2396, Section 5.2, 6), e)
  tmp = []
  rel_path.each do |x|
    if x == '..' &&
        !(tmp.empty? || tmp.last == '..')
      tmp.pop
    else
      tmp << x
    end
  end

  add_trailer_slash = !tmp.empty?
  if base_path.empty?
    base_path = [''] # keep '/' for root directory
  elsif add_trailer_slash
    base_path.pop
  end
  while x = tmp.shift
    if x == '..'
      # RFC2396, Section 4
      # a .. or . in an absolute path has no special meaning
      base_path.pop if base_path.size > 1
    else
      # if x == '..'
      #   valid absolute (but abnormal) path "/../..."
      # else
      #   valid absolute path
      # end
      base_path << x
      tmp.each {|t| base_path << t}
      add_trailer_slash = false
      break
    end
  end
  base_path.push('') if add_trailer_slash

  return base_path.join('/')
end

# File uri/generic.rb, line 299
def replace!(oth)
  if self.class != oth.class
    raise ArgumentError, "expected #{self.class} object"
  end

  component.each do |c|
    self.__send__("#{c}=", oth.__send__(c))
  end
end

# File uri/generic.rb, line 981
def split_path(path)
  path.split("/", -1)
end

# File uri/generic.rb, line 542
def split_userinfo(ui)
  return nil, nil unless ui
  user, password = ui.split(':', 2)

  return user, password
end