#!/opt/bin/perl

use strict;

use Crossfire;
use Crossfire::Client;
use Crossfire::Protocol;

use Client::Util;

package Crossfire::Client; # uh, yeah

use strict;

our $CFG;
our $VERSION = '0.1';

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

my $conn;
my $app;

my $WIDTH  = 640;
my $HEIGHT = 480;

sub glinit {
   # nuke all gl context data
   
   $app = new SDL::App
      -flags         => SDL_ANYFORMAT | SDL_HWSURFACE,
      -title         => "Crossfire+ Client",
      -width         => $WIDTH,
      -height        => $HEIGHT,
      -opengl        => 1,
      -red_size      => 8,
      -green_size    => 8,
      -blue_size     => 8,
      -double_buffer => 1,
      -resizeable    => 0;

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE;
   glShadeModel GL_FLAT;
   glDisable GL_DEPTH_TEST;
   glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;
   glEnable GL_BLEND;

   glMatrixMode GL_PROJECTION;
   glLoadIdentity;
   glOrtho 0, $WIDTH / 32, $HEIGHT / 32, 0, -1 , 1;

   # re-bind all textures
}

sub refresh {
   glClearColor 0, 0, 0, 0;
   glClear GL_COLOR_BUFFER_BIT;

   my $map = $conn->{map};

   for my $x (0 .. $conn->{mapw} - 1) {
      for my $y (0 .. $conn->{maph} - 1) {

         my $cell = $map->[$x][$y]
            or next;

         my $darkness = $cell->[3] * (1 / 255);
         my $darkness = 0.8 + 0.2*rand;
         glColor $darkness, $darkness, $darkness;

         for my $num (grep $_, $cell->[0], $cell->[1], $cell->[2]) {
            my $tex = $conn->{face}[$num]{texture} || 0;
 
            glBindTexture GL_TEXTURE_2D, $tex;

            glBegin GL_QUADS;
            glTexCoord 0, 0; glVertex $x, $y;
            glTexCoord 0, 1; glVertex $x,     $y + 1;
            glTexCoord 1, 1; glVertex $x + 1, $y + 1;
            glTexCoord 1, 0; glVertex $x + 1, $y;
            glEnd;
         }
      }
   }

   SDL::GLSwapBuffers;
}

my $ev = new SDL::Event;
my %ev_cb;

sub event(&$) {
   $ev_cb{$_[0]->()} = $_[1];
}

sub does(&) { shift }

event {SDL_QUIT} does {
   exit;
};

event {SDL_VIDEORESIZE} does {
   print "resize\n";
};

event {SDL_VIDEOEXPOSE} does {
   refresh;
};

event {SDL_KEYDOWN} does {
   print "keypress\n";
};

event {SDL_KEYUP} does {
   print "keyup\n";#d#
};

event {SDL_MOUSEMOTION} does {
   print "motion\n";
};

event {SDL_MOUSEBUTTONDOWN} does {
   print "button\n";
};

event {SDL_MOUSEBUTTONUP} does {
   print "buttup\n";
};

event {SDL_ACTIVEEVENT} does  {
   print "active\n";
};

package Crossfire::Client;

@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_update {
   my ($self, $num, $face) = @_;

   warn "up face $self,$num,$face\n";#d#
   use Gtk2;

   my $pb = new Gtk2::Gdk::PixbufLoader;
   $pb->write ($face->{image});
   $pb->close;

   $pb = $pb->get_pixbuf;
   $pb = $pb->add_alpha (0, 0, 0, 0);

   glGetError();
   my ($tex) = @{glGenTextures 1};

   $face->{texture} = $tex;
   
   glBindTexture GL_TEXTURE_2D, $tex;
   my $glerr=glGetError(); die "a: ".gluErrorString($glerr)."\n" if $glerr;
                
   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR;
   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR;#_MIPMAP_LINEAR;
   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP;
   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP;
   
   glTexImage2D GL_TEXTURE_2D, 0,
                GL_RGBA8,
                $pb->get_width, $pb->get_height,
                0,
                GL_RGBA,
                GL_UNSIGNED_BYTE,
                $pb->get_pixels;
   my $glerr=glGetError(); die "Problem setting up 2d Texture (dimensions not a power of 2?)):".gluErrorString($glerr)."\n" if $glerr;
}

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

use Event;

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

glinit;

$conn = new conn
   host => "cf.schmorp.de",
   port => 13327;

Event->timer (after => 0, interval => 1/20, hard => 1, cb => sub {
   while ($ev->poll) {
      ($ev_cb{$ev->type} || sub { warn "unhandled event ", $ev->type })->();
   }
});

Event::loop;