#!/opt/bin/perl

use strict;
use utf8;

use Glib;
use Gtk2 -init;

use SDL;
use SDL::App;
use SDL::Event;
use SDL::Surface;
use SDL::OpenGL;
use SDL::OpenGL::Constants;

use Crossfire;
use Crossfire::Protocol;

use Crossfire::Client;
use Crossfire::Client::Widget;

our $VERSION = '0.1';

my $MAX_FPS = 30;
my $TICKS_PER_FRAME = int 1000 / $MAX_FPS - 1; # min ticks per frame

our $FACECACHE;

our $CFG;
our $CONN;

our $WIDTH;
our $HEIGHT;
our $FULLSCREEN;

our $FONTSIZE;

our $SDL_TIMER;
our $SDL_APP;
our $SDL_EV;
our %SDL_CB;

our $ALT_ENTER_MESSAGE;
our $STATUS_LINE;

my $last_refresh;
my %ANIMATE;
my $refresh_handler;

our ($tw, $te); # Test widget #d#

sub init_screen {
   $SDL_APP = new SDL::App
      -flags         => SDL_ANYFORMAT | SDL_HWSURFACE,
      -title         => "Crossfire+ Client",
      -width         => $WIDTH,
      -height        => $HEIGHT,
      -opengl        => 1,
      -red_size      => 5,
      -green_size    => 5,
      -blue_size     => 5,
      -alpha_size    => 0,
      -double_buffer => 1,
      -fullscreen    => $FULLSCREEN,
      -resizeable    => 0;

   $SDL_EV = new SDL::Event;
   $SDL_EV->set_unicode (1);

   $SDL_TIMER = add Glib::Timeout 1000/50, sub {
      ($SDL_CB{$SDL_EV->type} || sub { warn "unhandled event ", $SDL_EV->type })->()
         while $SDL_EV->poll;

      1
   };

   $last_refresh = SDL::GetTicks;

   Crossfire::Client::gl_init;

   $FONTSIZE = int $HEIGHT / 50;

   #############################################################################

   glClearColor 0.45, 0.45, 0.45, 1;

   glEnable GL_TEXTURE_2D;
   glEnable GL_COLOR_MATERIAL;
   glShadeModel GL_FLAT;
   glDisable GL_DEPTH_TEST;
   glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;

   #############################################################################
   
   $STATUS_LINE = new Crossfire::Client::Widget::Label
                      0, $HEIGHT * 59 / 60 - $FONTSIZE, 1, $FONTSIZE,
                      "";
   $Crossfire::Client::Widget::TOPLEVEL->add ($STATUS_LINE);

   $ALT_ENTER_MESSAGE = new Crossfire::Client::Widget::Label
                            0, $HEIGHT * 59 / 60, 1, $HEIGHT / 60,
                            "Use <b>Alt-Enter</b> to toggle fullscreen mode";
   $Crossfire::Client::Widget::TOPLEVEL->add ($ALT_ENTER_MESSAGE);

   # Test code #d#
   unless ($tw) { # haha...
      $te = new Crossfire::Client::Widget::FancyFrame;
      $te->add (new Crossfire::Client::Widget::Entry);
      $te->move (300, 0, 2);
      $Crossfire::Client::Widget::TOPLEVEL->add ($te);
      
      $tw = new Crossfire::Client::Widget::Animator;
      my $lbl1 = new Crossfire::Client::Widget::Label
         0, 0, 10, $FONTSIZE, "<i>This</i> is a\n<u>TEST</u>!\nOf a themed\nFrame!";
      my $lbl2 = new Crossfire::Client::Widget::Label
         0, 0, 10, $FONTSIZE, "LBL2";

      my $vb = new Crossfire::Client::Widget::VBox;
      my $f  = new Crossfire::Client::Widget::FancyFrame;
      my $f2 = new Crossfire::Client::Widget::FancyFrame;
      $f->add ($lbl1);
      $f2->add ($lbl2);
      $vb->add ($f);
      $vb->add ($f2, 1);

      $tw->add ($vb);
      $tw->w (400);
      $tw->h (300);
      $tw->move ($WIDTH - 200, 0);
      $tw->moveto (0, 0);
      $Crossfire::Client::Widget::TOPLEVEL->add ($tw);

#     $f->move ($WIDTH - 200, 0);
#     $Crossfire::Client::Widget::TOPLEVEL->add ($f);
   }
}

sub destroy_screen {
   remove Glib::Source $SDL_TIMER;
   undef $SDL_APP;
   undef $SDL_EV;
   SDL::Quit;
}

sub start_game {
   $WIDTH      = $CFG->{width};
   $HEIGHT     = $CFG->{height};
   $FULLSCREEN = 0;

   init_screen;

   my $mapsize = List::Util::min 64, List::Util::max 11, int $WIDTH * $CFG->{mapsize} * 0.01 / 32;

   $CONN = new conn
      host => $CFG->{host},
      port => $CFG->{port},
      user => $CFG->{user},
      pass => $CFG->{password},
      mapw => $mapsize,
      maph => $mapsize,
   ;

   Crossfire::Client::lowdelay fileno $CONN->{fh};
}

sub stop_game {
   remove Glib::Source $refresh_handler if $refresh_handler;
   undef $refresh_handler;

   undef $CONN;
   destroy_screen;
}

sub force_refresh {
   glViewport 0, 0, $WIDTH, $HEIGHT;

   glMatrixMode GL_PROJECTION;
   glLoadIdentity;
   glOrtho 0, $WIDTH, $HEIGHT, 0, -10000 , 10000;
   glMatrixMode GL_MODELVIEW;

   glClear GL_COLOR_BUFFER_BIT;

   $Crossfire::Client::Widget::TOPLEVEL->draw;

   SDL::GLSwapBuffers;
}

sub refresh {
   $refresh_handler ||= add Glib::Idle sub {
      if ($SDL_APP) {
         my $next_refresh = SDL::GetTicks;

         if ($next_refresh - $last_refresh < $TICKS_PER_FRAME) {
            SDL::Delay $TICKS_PER_FRAME - ($next_refresh - $last_refresh);
            $next_refresh = SDL::GetTicks;
         }
         
         my $interval = ($next_refresh - $last_refresh) * 0.001;
         $last_refresh = $next_refresh;

         force_refresh;
         $_->animate ($interval) for grep $_, values %ANIMATE;

         if (%ANIMATE) {
            1
         } else {
            undef $refresh_handler;
            0
         }
      } else {
         undef $refresh_handler;
         0
      }
   };
}

sub animation_start {
   my ($widget) = @_;
   $ANIMATE{$widget} = $widget;
   Scalar::Util::weaken $ANIMATE{$widget};

   refresh;
}

sub animation_stop {
   my ($widget) = @_;
   delete $ANIMATE{$widget};
}

%SDL_CB = (
   SDL_QUIT() => sub {
      main_quit Gtk2;
   },
   SDL_VIDEORESIZE() => sub {
   },
   SDL_VIDEOEXPOSE() => sub {
      refresh;
   },
   SDL_KEYDOWN() => sub {
      if ($SDL_EV->key_mod & KMOD_ALT && $SDL_EV->key_sym == SDLK_RETURN) {
         # alt-enter
         $FULLSCREEN = !$FULLSCREEN;
         init_screen;
      } else {
         Crossfire::Client::Widget::feed_sdl_key_down_event ($SDL_EV);
      }
   },
   SDL_KEYUP() => sub {
      Crossfire::Client::Widget::feed_sdl_key_up_event ($SDL_EV);
   },
   SDL_MOUSEMOTION() => sub {
      Crossfire::Client::Widget::feed_sdl_motion_event ($SDL_EV);
   },
   SDL_MOUSEBUTTONDOWN() => sub {
      Crossfire::Client::Widget::feed_sdl_button_down_event ($SDL_EV);
   },
   SDL_MOUSEBUTTONUP() => sub {
      Crossfire::Client::Widget::feed_sdl_button_up_event ($SDL_EV);
   },
   SDL_ACTIVEEVENT() => sub {
      printf "active %x %x\n", $SDL_EV->active_gain, $SDL_EV->active_state;#d#
   },
);

@conn::ISA = Crossfire::Protocol::;

sub conn::map_update {
   my ($self, $dirty) = @_;

   refresh;
}

sub conn::map_scroll {
   my ($self, $dx, $dy) = @_;

#   refresh;
}

sub conn::map_clear {
   my ($self) = @_;

#   refresh;
}

sub conn::face_find {
   my ($self, $face) = @_;

   $FACECACHE->{"$face->{chksum},$face->{name}"}
}

sub conn::face_update {
   my ($self, $face) = @_;

   $FACECACHE->{"$face->{chksum},$face->{name}"} = $face->{image};

   $face->{texture} = new_from_image Crossfire::Client::Texture delete $face->{image};
}

sub conn::query {
   my ($self, $flags, $prompt) = @_;

   warn "<<<<QUERY:$flags:$prompt>>>\n";#d#
}

sub gtk_add_cfg_field {
   my ($tbl, $cfg, $klbl, $key, $value) = @_;
   my $i = $cfg->{_i}++;
   $tbl->attach_defaults (my $lbl = Gtk2::Label->new ($klbl), 0, 1, $i, $i + 1);
   $tbl->attach_defaults (my $ent = Gtk2::Entry->new,         1, 2, $i, $i + 1);
      if ($key eq 'password') {
         $ent->set_invisible_char ("*");
         $ent->set (visibility => 0)
      }
      $ent->set_text ($value);
      $ent->signal_connect (changed => sub {
         my ($ent) = @_;
         $cfg->{$key} = $ent->get_text;
         # TODO: Mapsize should be a slider in the game gui
         if ($key eq 'mapsize' and $cfg->{$key} > 100) {
            $cfg->{$key} = 100;
         } elsif ($key eq 'mapsize' and $cfg->{$key} < 50) {
            $cfg->{$key} = 50;
         }
      });
}

sub run_config_dialog {
   my (%events) = @_;

   my $w = Gtk2::Window->new;

   my @cfg = (
      [qw/Host     host/],
      [qw/Port     port/],
      [qw/Mapsize% mapsize/],
      [qw/Username user/],
      [qw/Password password/],
   );

   my $cfg = {};

   my $a = SDL::ListModes (0, SDL_FULLSCREEN|SDL_HWSURFACE);
   my @modes = map { [SDL::RectW ($_), SDL::RectH ($_)] } @$a;

   $w->add (my $vb = Gtk2::VBox->new);
      $vb->pack_start (my $t = Gtk2::Table->new (2, scalar @cfg), 0, 0, 0);
         my $selmode = $::CFG->{width} . 'x' . $::CFG->{height};
         $t->attach_defaults (Gtk2::Label->new ("Modes"), 0, 1, 0, 1);
         $t->attach_defaults (my $cb = Gtk2::ComboBox->new_text, 1, 2, 0, 1);
            my $i = 0;
            my $act = 0;
            for (map { "$_->[0]x$_->[1]" } reverse @modes) {
               if ($_ eq $selmode) { $act = $i }
               $cb->append_text ($_);
               $i++;
            }
            $cb->set_active ($act);
            $cb->signal_connect (changed => sub {
               my ($cb) = @_;
               my $txt = $cb->get_active_text;
               if ($txt =~ m/(\d+)x(\d+)/) {
                  $::CFG->{width} = $1;
                  $::CFG->{height} = $2;
               }
            });

         $cfg->{_i} = 1;
         for (@cfg) {
            gtk_add_cfg_field ($t, $cfg, $_->[0], $_->[1], $::CFG->{$_->[1]});
         }

      $vb->pack_start (my $hb = Gtk2::HBox->new, 0, 0, 0);
         $hb->pack_start (my $cb = Gtk2::Button->new ("save"), 1, 1, 5);
            $cb->signal_connect (clicked => sub {
               for (keys %$cfg) {
                  $::CFG->{$_} = $cfg->{$_}
                     if $_ ne '_i';
               }
               Crossfire::Client::write_cfg "$Crossfire::VARDIR/pclientrc";
            });
         $hb->pack_start (my $cb = Gtk2::Button->new ("login"), 1, 1, 5);
            $cb->signal_connect (clicked => sub {
               for (keys %$cfg) {
                  $::CFG->{$_} = $cfg->{$_}
                     if $_ ne '_i';
               }
               my $cb = $events{login} || sub {};
               $cb->($::CFG->{user}, $::CFG->{password});
            });
         $hb->pack_start (my $cb = Gtk2::Button->new ("logout"), 1, 1, 5);
            $cb->signal_connect (clicked => sub {
               my $cb = $events{logout} || sub {};
               $cb->();
            });
         $hb->pack_start (my $cb = Gtk2::Button->new ("quit"), 1, 1, 5);
            $cb->signal_connect (clicked => sub { $w->destroy });

   $w->show_all;

   $w->signal_connect (destroy => sub { Gtk2->main_quit });
}


#############################################################################

SDL::Init SDL_INIT_EVERYTHING;

my $mapwidget = Crossfire::Client::Widget::MapWidget->new;

$Crossfire::Client::Widget::TOPLEVEL->add ($mapwidget);
$mapwidget->focus_in;

Crossfire::Client::read_cfg "$Crossfire::VARDIR/pclientrc";

$CFG ||= {
   width      => 640,
   height     => 480,
   mapsize    => 100,
   fullscreen => 0,
   host       => "crossfire.schmorp.de",
   port       => 13327,
};

Crossfire::Client::set_font Crossfire::Client::find_rcfile "uifont.ttf";

$FACECACHE = eval { Crossfire::load_ref "$Crossfire::VARDIR/pclient.faces" } || {};

run_config_dialog
   login  => sub { start_game  },
   logout => sub { stop_game };

main Gtk2;

Crossfire::save_ref $FACECACHE, "$Crossfire::VARDIR/pclient.faces";