=head1 NAME

CFClient - undocumented utility garbage for our crossfire client

=head1 SYNOPSIS

 use CFClient;

=head1 DESCRIPTION

=over 4

=cut

package CFClient;

BEGIN {
   $VERSION = '0.1';

   use XSLoader;
   XSLoader::load "CFClient", $VERSION;
}

use utf8;

use Carp ();
use AnyEvent ();
use BerkeleyDB;
use Pod::POM ();
use Storable (); # finally

package CFClient::PodToPango;

use base Pod::POM::View::Text;

our $VERSION = 1; # bump if resultant formatting changes

our $indent = 0;

*view_seq_code   =
*view_seq_bold   = sub { "<b>$_[1]</b>" };
*view_seq_italic = sub { "<i>$_[1]</i>" };
*view_seq_space  =
*view_seq_link   =
*view_seq_index  = sub { CFClient::UI::Label::escape ($_[1]) };

sub view_seq_text {
   my $text = $_[1];
   $text =~ s/\s+/ /g;
   CFClient::UI::Label::escape ($text)
}

sub view_item {
   ("\t" x ($indent / 4))
   . $_[1]->title->present ($_[0])
   . "\n\n"
   . $_[1]->content->present ($_[0])
}

sub view_verbatim {
   (join "",
       map +("\t" x ($indent / 2)) . "<tt>$_</tt>\n",
          split /\n/, CFClient::UI::Label::escape ($_[1]))
   . "\n"
}

sub view_textblock {
   ("\t" x ($indent / 2)) . "$_[1]\n\n"
}

sub view_head1 {
   "\n\n<span foreground='#ffff00' size='x-large'>" . $_[1]->title->present ($_[0]) . "</span>\n\n"
   . $_[1]->content->present ($_[0])
};

sub view_head2 {
   "\n<span foreground='#ccccff' size='large'>" . $_[1]->title->present ($_[0]) . "</span>\n\n"
   . $_[1]->content->present ($_[0])
};

sub view_head3 {
   "\n<span size='large'>" . $_[1]->title->present ($_[0]) . "</span>\n\n"
   . $_[1]->content->present ($_[0])
};

sub view_over {
   local $indent = $indent + $_[1]->indent;
   $_[1]->content->present ($_[0])
}

package CFClient::Database;

our @ISA = BerkeleyDB::Btree::;

sub get($$) {
   my $data;

   $_[0]->db_get ($_[1], $data) == 0
      ? $data
      : ()
}

my %DB_SYNC;

sub put($$$) {
   my ($db, $key, $data) = @_;

   $DB_SYNC{$db} = AnyEvent->timer (after => 5, cb => sub { $db->db_sync });

   $db->db_put ($key => $data)
}

package CFClient;

sub find_rcfile($) {
   my $path;

   for (grep !ref, @INC) {
      $path = "$_/CFClient/resources/$_[0]";
      return $path if -r $path;
   }

   die "FATAL: can't find required file $_[0]\n";
}

sub read_cfg {
   my ($file) = @_;

   open CFG, $file
      or return;

   my $CFG;

   local $/;
   $CFG = eval <CFG>;

   $::CFG = $CFG;

   close CFG;
}

sub write_cfg {
   my ($file) = @_;

   open CFG, ">$file"
      or return;

   {
      require Data::Dumper;
      local $Data::Dumper::Purity = 1;
      $::CFG->{VERSION} = $::VERSION;
      print CFG Data::Dumper->Dump ([$::CFG], [qw/CFG/]);
   }

   close CFG;
}

our $DB_ENV;

{
   use strict;

   mkdir "$Crossfire::VARDIR/cfplus", 0777;
   my $recover = $BerkeleyDB::db_version >= 4.4 
                 ? eval "DB_REGISTER | DB_RECOVER"
                 : 0;

   $DB_ENV = new BerkeleyDB::Env
                    -Home => "$Crossfire::VARDIR/cfplus",
                    -Cachesize => 1_000_000,
                    -ErrFile => "$Crossfire::VARDIR/cfplus/errorlog.txt",
#                 -ErrPrefix => "DATABASE",
                    -Verbose => 1,
                    -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
                    -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
                       or die "unable to create/open database home $Crossfire::VARDIR/cfplus: $BerkeleyDB::Error";
}

sub db_table($) {
   my ($table) = @_;

   $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;

   new CFClient::Database
      -Env      => $DB_ENV,
      -Filename => $table,
#      -Filename => "database",
#      -Subname  => $table,
      -Property => DB_CHKSUM,
      -Flags    => DB_CREATE | DB_UPGRADE,
         or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
}

my $pod_cache = db_table "pod_cache";

sub load_pod($$$$) {
   my ($path, $filtertype, $filterversion, $filtercb) = @_;

   stat $path
      or die "$path: $!";

   my $phash = join ",", $filterversion, $CFClient::PodToPango::VERSION, (stat _)[7,9];

   my ($chash, $pom) = eval { @{ Storable::thaw $pod_cache->get ("$path/$filtertype") } };

   return $pom if $chash eq $phash;

   my $pod = do {
      local $/;
      open my $pod, "<:utf8", $_[0]
         or die "$_[0]: $!";
      <$pod>
   };

   #utf8::downgrade $pod;

   $pom = $filtercb-> (Pod::POM->new->parse_text ($pod));

   $pod_cache->put ("$path/$filtertype" => Storable::nfreeze [$phash, $pom]);

   $pom
}

sub pod_to_pango($) {
   my ($pom) = @_;

   $pom->present ("CFClient::PodToPango")
}

sub pod_to_pango_list($) {
   my ($pom) = @_;

   [
      map s/^(\s*)// && [40 * length $1, length $_ ? $_ : " "],
         split /\n/, $pom->present ("CFClient::PodToPango")
   ]
}

package CFClient::Item;

use strict;
use Crossfire::Protocol::Constants;

my $last_enter_count = 1;

sub desc_string {
   my ($self) = @_;

   my $desc =
      $self->{nrof} < 2
         ? $self->{name}
         : "$self->{nrof} × $self->{name_pl}";

   $self->{flags} & F_OPEN
      and $desc .= " (open)";
   $self->{flags} & F_APPLIED
      and $desc .= " (applied)";
   $self->{flags} & F_UNPAID
      and $desc .= " (unpaid)";
   $self->{flags} & F_MAGIC
      and $desc .= " (magic)";
   $self->{flags} & F_CURSED
      and $desc .= " (cursed)";
   $self->{flags} & F_DAMNED
      and $desc .= " (damned)";
   $self->{flags} & F_LOCKED
      and $desc .= " *";

   $desc
}

sub weight_string {
   my ($self) = @_;

   my $weight = ($self->{nrof} || 1) * $self->{weight};

   $weight < 0 ? "?" : $weight * 0.001
}

sub do_n_dialog {
   my ($cb) = @_;

   my $w = new CFClient::UI::FancyFrame;
   $w->add (my $vb = new CFClient::UI::VBox x => "center", y => "center");
   $vb->add (new CFClient::UI::Label text => "Enter item count:");
   $vb->add (my $entry = new CFClient::UI::Entry
      text => $last_enter_count,
      on_activate => sub {
         my ($entry) = @_;
         $last_enter_count = $entry->get_text;
         $cb->($last_enter_count);
         $w->hide;
         $w = undef;
      }
   );
   $entry->focus_in;
   $w->show;

}

sub update_widgets {
   my ($self) = @_;

   my $button_cb = sub {
      my (undef, $ev, $x, $y) = @_;

      my $targ = $::CONN->{player}{tag};

      if ($self->{container} == $::CONN->{player}{tag}) {
         $targ = $::CONN->{open_container};
      }

      if (($ev->{mod} & CFClient::KMOD_SHIFT) && $ev->{button} == 1) {
         $::CONN->send ("move $targ $self->{tag} 0")
            if $targ || !($self->{flags} & F_LOCKED);
      } elsif (($ev->{mod} & CFClient::KMOD_SHIFT) && $ev->{button} == 2) {
         $self->{flags} & F_LOCKED
            ? $::CONN->send ("lock " . pack "CN", 0, $self->{tag})
            : $::CONN->send ("lock " . pack "CN", 1, $self->{tag})
      } elsif ($ev->{button} == 1) {
         $::CONN->send ("examine $self->{tag}");
      } elsif ($ev->{button} == 2) {
         $::CONN->send ("apply $self->{tag}");
      } elsif ($ev->{button} == 3) {
         my @menu_items = (
            ["examine", sub { $::CONN->send ("examine $self->{tag}") }],
            ["mark",    sub { $::CONN->send ("mark ". pack "N", $self->{tag}) }],
            ["apply",   sub { $::CONN->send ("apply $self->{tag}") }],
            (
               $self->{flags} & F_LOCKED
               ? (
                  ["unlock", sub { $::CONN->send ("lock " . pack "CN", 0, $self->{tag}) }],
                 )
               : (
                  ["lock",   sub { $::CONN->send ("lock " . pack "CN", 1, $self->{tag}) }],
                  ["drop",   sub { $::CONN->send ("move $::CONN->{open_container} $self->{tag} 0") }],
                  ["move n", 
                     sub {
                        do_n_dialog (sub { $::CONN->send ("move $targ $self->{tag} $_[0]") })
                     }
                  ]
               )
            ),
         );

         CFClient::UI::Menu->new (items => \@menu_items)->popup ($ev);
      }

      1
   };

   my $tooltip_std = "<small>"
                   . "Left click - examine item\n"
                   . "Shift-Left click - " . ($self->{container} ? "move or drop" : "take") . " item\n"
                   . "Middle click - apply\n"
                   . "Shift-Middle click - lock/unlock\n"
                   . "Right click - further options"
                   . "</small>\n";

   $self->{face_widget} ||= new CFClient::UI::Face 
      can_events => 1,
      can_hover  => 1,
      anim       => $self->{anim},
      animspeed  => $self->{animspeed}, # TODO# must be set at creation time
      on_button_down => $button_cb,
   ;
   $self->{face_widget}{face}      = $self->{face};
   $self->{face_widget}{anim}      = $self->{anim};
   $self->{face_widget}{animspeed} = $self->{animspeed};
   $self->{face_widget}->set_tooltip (
      "<b>Face/Animation.</b>\n"
    . "Item uses face #$self->{face}. "
    . ($self->{animspeed} ? "Item uses animation #$self->{anim} at " . (1 / $self->{animspeed}) . "fps. " : "Item is not animated. ")
    . "\n\n$tooltip_std"
   );
   
   $self->{desc_widget} ||= new CFClient::UI::Label
      can_events => 1,
      can_hover  => 1,
      ellipsise  => 2,
      align      => -1,
      on_button_down => $button_cb,
   ;
   my $desc = CFClient::Item::desc_string $self;
   $self->{desc_widget}->set_text ($desc);
   $self->{desc_widget}->set_tooltip ("<b>$desc</b>.\n$tooltip_std");

   $self->{weight_widget} ||= new CFClient::UI::Label
      can_events => 1,
      can_hover  => 1,
      ellipsise  => 0,
      align      => 0,
      on_button_down => $button_cb,
   ;
   $self->{weight_widget}->set_text (CFClient::Item::weight_string $self);

   $self->{weight_widget}->set_tooltip (
      "<b>Weight</b>.\n"
    . ($self->{weight} >= 0 ? "One item weighs $self->{weight}g. " : "You have no idea how much this weighs. ")
    . ($self->{nrof} ? "You have $self->{nrof} of it. " : "Item cannot stack with others of it's kind. ")
    . "\n\n$tooltip_std"
   );
}

package CFClient::Binder;

my @ALLOWED_MODIFIER_KEYS = (
   CFClient::SDLK_LSHIFT,
   CFClient::SDLK_LCTRL ,
   CFClient::SDLK_LALT  ,
   CFClient::SDLK_LMETA ,

   CFClient::SDLK_RSHIFT,
   CFClient::SDLK_RCTRL ,
   CFClient::SDLK_RALT  ,
   CFClient::SDLK_RMETA ,
);

my %ALLOWED_MODIFIERS = (
   CFClient::KMOD_LSHIFT => "LSHIFT",
   CFClient::KMOD_LCTRL  => "LCTRL",
   CFClient::KMOD_LALT   => "LALT",
   CFClient::KMOD_LMETA  => "LMETA",

   CFClient::KMOD_RSHIFT => "RSHIFT",
   CFClient::KMOD_RCTRL  => "RCTRL",
   CFClient::KMOD_RALT   => "RALT",
   CFClient::KMOD_RMETA  => "RMETA",
);

my %DIRECT_BIND_CHARS = map { $_ => 1 } qw/0 1 2 3 4 5 6 7 8 9/;
my @DIRECT_BIND_KEYS = (
   CFClient::SDLK_F1,
   CFClient::SDLK_F2,
   CFClient::SDLK_F3,
   CFClient::SDLK_F4,
   CFClient::SDLK_F5,
   CFClient::SDLK_F6,
   CFClient::SDLK_F7,
   CFClient::SDLK_F8,
   CFClient::SDLK_F9,
   CFClient::SDLK_F10,
   CFClient::SDLK_F11,
   CFClient::SDLK_F12,
   CFClient::SDLK_F13,
   CFClient::SDLK_F14,
   CFClient::SDLK_F15,
);

# this binding dialog asks for a key-combo to be pressed
# and if successful it calls the $cb with $mod and $sym as args.
sub open_binding_dialog {
   my ($cb) = @_;

   my $w = new CFClient::UI::FancyFrame
      title => "Bind Action",
      x => "center",
      y => "center";

   $w->add (my $vb = new CFClient::UI::VBox);
   $vb->add (new CFClient::UI::Label
      text => "Press a modifier (CTRL, ALT and/or SHIFT) and a key."
             ."You can only bind 0-9 and F1-F15 without modifiers."
   );
   $vb->add (my $entry = new CFClient::UI::Entry
      text => "",
      on_key_down => sub {
         my ($entry, $ev) = @_;

         my $mod = $ev->{mod};
         my $sym = $ev->{sym};

         # XXX: This seems a little bit hackisch to me, but i have to ignore them
         if (grep { $_ == $sym } @ALLOWED_MODIFIER_KEYS) {
            return;
         }

         if ($mod == CFClient::KMOD_NONE
             and not $DIRECT_BIND_CHARS{chr ($ev->{unicode})}
             and not grep { $sym == $_ } @DIRECT_BIND_KEYS)
         {
            $::STATUSBOX->add (
               "Can't bind key ".CFClient::SDL_GetKeyName ($sym)
               ." directly without modifier! It would damage the completer handling."
            );
            return;
         }

         $entry->focus_out;

         $cb->($mod, $sym);

         $w->destroy
      });

   $entry->focus_in;
   $w->show;
}

sub keycombo_to_name {
   my ($mod, $sym) = @_;

   my $mods = join '+',
                 map { $ALLOWED_MODIFIERS{$_} }
                    grep { ($_ + 0) & ($mod + 0) }
                       keys %ALLOWED_MODIFIERS;
   $mods .= "+" if $mods ne '';

   return $mods . CFClient::SDL_GetKeyName ($sym);
}

1;

=back

=head1 AUTHOR

 Marc Lehmann <schmorp@schmorp.de>
 http://home.schmorp.de/

=cut