class Gtk2PasswordApp

# File lib/gtk2passwordapp.rb, line 24
def self.cli
  # User using cli may be experiencing system problems.
  begin
    require 'gtk2passwordapp/cli'
    require 'yaml_zlib_blowfish'
    require 'base_convert'
  rescue LoadError
    $stderr.puts 'Missing Gem:'
    $stderr.puts $!.message
    exit 72
  end
end

# File lib/gtk2passwordapp.rb, line 37
def self.gui
  # This is a Gtk3App.
  require 'gtk3app'

  # Helper Gems.
  require 'base32'
  require 'totp'
  require 'yaml_zlib_blowfish'
  require 'super_random'
  require 'base_convert'

  # This Gem.
  require_relative 'gtk2passwordapp/config.rb'
  require_relative 'gtk2passwordapp/account.rb'
  require_relative 'gtk2passwordapp/accounts.rb'
  require_relative 'gtk2passwordapp/gui.rb'
end

# File lib/gtk2passwordapp/gui.rb, line 2
def initialize(stage, toolbar, options)
  @primary   = Gtk::Clipboard.get(Gdk::Selection::PRIMARY)  
  @clipboard = Gtk::Clipboard.get(Gdk::Selection::CLIPBOARD)
  @accounts  = Accounts.new(CONFIG[:PwdFile])
  @toolbox   = Such::Box.new toolbar, :toolbox!
  @pages     = Such::Box.new stage, :pages!
  @recent = []
  @reset = @on_main_page = false
  @red,@green,@blue,@white =
    [:Red,:Green,:Blue,:White].map{Gdk::RGBA.parse(CONFIG[_1])}
  @tools = @password_page = @add_page = @edit_page = @main_page = @menu = nil
  build_password_page
  build_logo_menu
  @password_entry.grab_focus
end

# File lib/gtk2passwordapp/cli.rb, line 2
def self.run(pattern='.',
             dump=File.expand_path('~/.cache/gtk3app/gtk2passwordapp/dump.yzb'),
             *trash)
  unless trash.empty?
    $stderr.puts HELP
    $stderr.puts "Please match usage."
    exit 64
  end
  begin
    pattern = Regexp.new pattern, Regexp::IGNORECASE
  rescue RegexpError
    $stderr.puts $!.message
    exit 65
  end
  unless File.exist? dump
    $stderr.puts "Passwords data file missing: #{dump}"
    exit 66
  end
  system('clear; clear')
  print "Enter password: "
  pwd = $stdin.gets.strip
  system('clear; clear')
  print "Enter salt: "
  pwd << $stdin.gets.strip
  system('clear; clear')
  h2q = BaseConvert::FromTo.new base: 16, digits: '0123456789ABCDEF',
                                to_base: 91, to_digits: :qgraph
  pwd = h2q.convert Digest::SHA256.hexdigest(pwd).upcase
  begin
    lst = YamlZlibBlowfish.new(pwd).load(dump)
  rescue OpenSSL::Cipher::CipherError
    $stderr.puts "Bad password+salt"
    exit 65
  end
  lst.select{|k,v|pattern.match? k}.each do |k,v|
    puts <<~RECORD
      Account: #{k}
         Username: #{v[2]}
         Password: #{v[0]}
         Previous: #{v[1]}
         Note: #{v[4]}
         URL: #{v[3]}
         Updated: #{Time.at(v[5]).strftime('%Y-%m-%d %H:%M:%S')}
    RECORD
  end
end

# File lib/gtk2passwordapp/gui.rb, line 54
def add_menu_item(name, color=nil)
  menu_item = Such::MenuItem.new [label:name], :main_menu_item, 'activate' do
    selected_account(name)
  end
  account = @accounts.get name
  unless color
    color = (Time.now.to_i - account.updated > CONFIG[:TooOld])? @red : @blue
  end
  menu_item.override_color :normal, color
  @menu.append menu_item
end

# File lib/gtk2passwordapp/gui.rb, line 107
def bootstrap_setups
  names = @accounts.data.keys
  account = (names.empty?)? nil : @accounts.get(names[rand(names.length)])
  setup_edit_page(account) if account
  setup_main_page(account)
end

# File lib/gtk2passwordapp/gui.rb, line 149
def build_add_page
  @add_page = Such::Box.new @pages, :page!
  Such::Label.new @add_page, :ADD_PAGE_LABEL, :page_label
  error_label = nil # updates below
  add_account_entry = field_row(@add_page, :NAME) do
    name = add_account_entry.text.strip
    @accounts.add name
    @accounts.save
    account = @accounts.get name
    setup_edit_page(account)
    setup_main_page(account)
    @add_page.hide
    add_account_entry.text = ''
    @edit_page.show_all
  rescue
    error_label.text = $!.message
  end
  Such::Button.new @add_page, :CANCEL, :tool_button do
    @add_page.hide
    add_account_entry.text = ''
    show_main_page
  end
  error_label = Such::Label.new @add_page, :error_label!
end

# File lib/gtk2passwordapp/gui.rb, line 204
def build_edit_page
  @edit_page = Such::Box.new @pages, :page!
  Such::Label.new @edit_page, :EDIT_PAGE_LABEL, :page_label

  @edit_name     = view_row  @edit_page, :NAME
  @edit_url      = field_row @edit_page, :URL
  @edit_note     = field_row @edit_page, :NOTE
  @edit_username = field_row @edit_page, :USERNAME
  @edit_password = field_row @edit_page, :PASSWORD, :password_entry!

  visibility_toggleling @edit_password

  generator = Such::Box.new @edit_page, :toolbox!
  pwdlen=rndpwd=nil
  Such::Button.new generator, :RAND, :tool_button do
    rndpwd = H2Q.convert RND.hexadecimal.upcase
    @edit_password.text = rndpwd[0...pwdlen.value]
  end
  pwdlen = Such::SpinButton.new generator, :pwdlen!, 'value-changed' do
    @edit_password.text = rndpwd[0...pwdlen.value] if rndpwd
  end

  toolbox     = Such::Box.new @edit_page,   :toolbox!
  error_label = Such::Label.new @edit_page, :error_label!

  Such::Button.new toolbox, :SAVE, :tool_button do
    account          = @accounts.get @edit_name.text.strip
    account.url      = @edit_url.text.strip
    account.note     = @edit_note.text.strip
    account.username = @edit_username.text.strip
    account.password = @edit_password.text.strip
    @accounts.save
    rndpwd = nil
    @edit_page.hide
    setup_main_page(account)
    show_main_page
  rescue
    error_label.text = $!.message
  end
  Such::Button.new toolbox, :CANCEL, :tool_button do
    account = @accounts.get @edit_name.text
    rndpwd = nil
    @edit_page.hide
    setup_edit_page(account) # restore values
    show_main_page
  end
  Such::Button.new toolbox, :DELETE, :tool_button do
    ursure = Gtk3App::YesNoDialog.new :delete_ursure!
    Gtk3App.transient ursure
    if ursure.ok?
      @recent.delete @edit_name.text
      @accounts.delete @edit_name.text
      @accounts.save
      rndpwd = nil
      @edit_page.hide
      bootstrap_setups
      show_main_page
    end
  end
end

# File lib/gtk2passwordapp/gui.rb, line 18
def build_logo_menu
  Gtk3App.logo_press_event do |button|
    next unless @on_main_page
    case button
    when 1
      popup_accounts_menu unless @accounts.data.empty?
    when 2
      reset_password
    when 3
      # Gets captured by Gtk3App's main menu
    end
  end
end

# File lib/gtk2passwordapp/gui.rb, line 273
def build_main_page
  @main_page = Such::Box.new @pages, :page!
  Such::Label.new @main_page, :MAIN_PAGE_LABEL, :page_label

  @name     = view_row @main_page, :NAME
  @url      = view_row @main_page, :URL
  @note     = view_row @main_page, :NOTE
  @username = view_row @main_page, :USERNAME
  @password = view_row @main_page, :PASSWORD

  show_toggleling @password
end

# File lib/gtk2passwordapp/gui.rb, line 120
def build_password_page
  @password_page = Such::Box.new @pages, :page!
  Such::Label.new @password_page, :PASSWORD_PAGE_LABEL, :page_label
  error_label,previous = nil,'' # updates below
  @password_entry = field_row(@password_page, :PASSWORD, :password_entry!) do
    pwd = @password_entry.text.strip
    @password_entry.text = ''
    raise CONFIG[:TooShort] if pwd.length < CONFIG[:MinPwdLen]
    if not @reset and @accounts.exist?
      @accounts.load rehash pwd
    else
      raise CONFIG[:Confirm] unless pwd==previous
      @accounts.save rehash pwd
      @reset = false
    end
    @password_page.hide
    build_add_page  unless @add_page
    build_edit_page unless @edit_page
    build_main_page unless @main_page
    build_tools     unless @tools
    bootstrap_setups
    show_main_page
  rescue
    error_label.text = $!.message
    previous = pwd
  end
  error_label = Such::Label.new @password_page, :error_label!
end

# File lib/gtk2passwordapp/gui.rb, line 294
def build_tools
  @tools = true
  Such::Button.new @toolbox, :ADD, :tool_button do
    hide_main_page
    @add_page.show_all
  end
  Such::Button.new @toolbox, :EDIT, :tool_button do
    unless (name=@name.text).empty?
      hide_main_page
      @edit_page.show_all
    end
  end
  Such::Button.new @toolbox, :GO, :tool_button do
    unless (name=@name.text).empty?
      url = @accounts.get(name).url
      system(Gtk3App::CONFIG[:Open], url) unless url.empty?
    end
  end
  Such::Button.new @toolbox, :CURRENT, :tool_button do
    unless (name=@name.text).empty?
      account = @accounts.get name
      copy2clipboard(account.password, account.username)
    end
  end
  Such::Button.new @toolbox, :PREVIOUS, :tool_button do
    unless (name=@name.text).empty?
      account = @accounts.get name
      copy2clipboard(account.previous, account.password)
    end
  end
end

# File lib/gtk2passwordapp/gui.rb, line 74
def copy2clipboard(pwd, user)
  @primary.text, @clipboard.text = pwd, user
  GLib::Timeout.add_seconds(CONFIG[:ClipboardTimeout]) do
    @primary.text = '' if @primary.wait_for_text == pwd
    @clipboard.text = '' if @clipboard.wait_for_text == user
    false
  end
end

# File lib/gtk2passwordapp/gui.rb, line 89
def field_row(page, label, entry=:field_entry!, &block)
  row = Such::Box.new page, :field_row!
  Such::Label.new(row, label, :field_label)
  Such::Entry.new(row, entry, ((block)? 'activate' : ''), &block)
end

# File lib/gtk2passwordapp/gui.rb, line 101
def hide_main_page
  @on_main_page = false
  @main_page.hide
  @toolbox.hide
end

# File lib/gtk2passwordapp/gui.rb, line 43
def popup_accounts_menu
  @menu = Such::Menu.new :main_menu!
  @menu.override_background_color(:normal, @white)
  @recent.each do |name| add_menu_item(name, @green) end
  @accounts.data.keys.sort{|a,b|a.upcase<=>b.upcase}.each do |name|
    add_menu_item(name)
  end
  @menu.show_all
  @menu.popup_at_pointer
end

# File lib/gtk2passwordapp/gui.rb, line 114
def rehash(pwd)
  pwd += CONFIG[:Salt] if pwd.length < CONFIG[:LongPwd]
  pwd = Digest::SHA256.hexdigest(pwd).upcase
  H2Q.convert pwd
end

# File lib/gtk2passwordapp/gui.rb, line 32
def reset_password
  ursure = Gtk3App::YesNoDialog.new :reset_ursure!
  Gtk3App.transient ursure
  if ursure.ok?
    @reset = true
    hide_main_page
    @password_page.show
    @password_entry.grab_focus
  end
end

# File lib/gtk2passwordapp/gui.rb, line 66
def selected_account(name)
  @recent.unshift name; @recent.uniq!; @recent.pop if @recent.length>3
  account = @accounts.get name
  setup_main_page account
  setup_edit_page account
  copy2clipboard(account.password, account.username)
end

# File lib/gtk2passwordapp/gui.rb, line 265
def setup_edit_page(account)
  @edit_name.text     = account.name
  @edit_url.text      = account.url
  @edit_note.text     = account.note
  @edit_username.text = account.username
  @edit_password.text = account.password
end

# File lib/gtk2passwordapp/gui.rb, line 286
def setup_main_page(account)
  @name.text     = account&.name     || ''
  @url.text      = account&.url      || ''
  @note.text     = account&.note     || ''
  @username.text = account&.username || ''
  @password.text =(account&.password&.>'')? CONFIG[:HiddenPwd] : ''
end

# File lib/gtk2passwordapp/gui.rb, line 95
def show_main_page
  @on_main_page = true
  @main_page.show_all
  @toolbox.show_all
end

# File lib/gtk2passwordapp/gui.rb, line 189
def show_toggleling(label)
  label.signal_connect('button-press-event') do |_,e|
    if e.button==1 and not (pwd=label.text).empty?
      case pwd
      when CONFIG[:HiddenPwd]
        label.text = @accounts.get(@name.text).password
      when TOTPx
        label.text = TOTP.passwords(label.text)[1].to_s
      else
        label.text = CONFIG[:HiddenPwd]
      end
    end
  end
end

# File lib/gtk2passwordapp/gui.rb, line 83
def view_row(page, label)
  row = Such::Box.new page, :field_row!
  Such::Label.new(row, label, :field_label)
  Such::Label.new(row, :field_view!)
end

# File lib/gtk2passwordapp/gui.rb, line 174
def visibility_toggleling(entry)
  entry.signal_connect('enter-notify-event') do
    entry.set_visibility true unless entry.has_focus?
  end
  entry.signal_connect('leave-notify-event') do
    entry.set_visibility false unless entry.has_focus?
  end
  entry.signal_connect('focus-in-event') do
    entry.set_visibility true
  end
  entry.signal_connect('focus-out-event') do
    entry.set_visibility false
  end
end