package GCE::EditAction;

=head1 NAME

  GCE::EditActions - this is the abstraction of edit actions (placing, deleting, etc.)

=cut

use Gtk2;
use Gtk2::Gdk::Keysyms;
use Gtk2::SimpleMenu;

use Crossfire;
use Crossfire::MapWidget;

use strict;

sub new {
   my $class = shift;
   my $self = { @_ };
   bless $self, $class;
   $self->init;
   return $self;
}

sub name { } # a unique name for this tool (for storing it in a hash in the main window)

sub tool_widget { if ($_[1]) { $_[0]->{widget} = $_[1] } $_[0]->{widget} }
sub init { }

sub want_cursor { 1 }

sub special_arrow { }

# edits one tile of the map
sub edit_one {
   my ($self, $x, $y) = @_;
   # do one edition 
}

# edits a selection
sub edit_selection {
}

# abstraction for edit_one and edit_selection ?
# takes selection if present
sub edit {
   my ($self, $map, $x, $y) = @_;
}

sub begin {
   my ($self, $map, $x, $y) = @_;

   $map->change_begin (ref $self);
}

sub end {
   my ($self, $map) = @_;

   if (my $changeset = $map->change_end) {
      splice @{ $map->{undo_stack} ||= [] },
             $map->{undo_stack_pos}++, 1e6,
             $changeset;

      #TODO: limit undo stack size to some preconfigured limit
   }
}

package GCE::EditAction::RadioModed;

our @ISA = qw/GCE::EditAction/;

sub add_mode_button {
   my ($self, $vb, $lbl, $mode, $default) = @_;

   $vb->pack_start (my $b = Gtk2::RadioButton->new ($self->{place_radio_grp}, $lbl), 0, 1, 0);
      unless (defined $self->{place_radio_grp}) {
         $self->{place_radio_grp} = $b->get_group;

         unless (defined $default) {
            $b->set_active (1);
            $self->set_mode ($mode);
         }
      }
      if ($default) {
         $b->set_active (1);
         $self->set_mode ($mode);
      }
      $b->signal_connect (clicked => sub {
            $self->set_mode ($mode);
      });
}

sub set_mode {
   my ($self, $mode) = @_;
   $self->{place_mode} = $mode;
}

sub get_mode {
   my ($self) = @_;
   $self->{place_mode}
}

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

   die "Implement me!!";

#   my $vb = new Gtk2::VBox;
#   $self->_add_mode_button ($vb, "auto",        "auto");
#   $self->_add_mode_button ($vb, "top",         "top");
#   $self->_add_mode_button ($vb, "above floor", "above");
#   $self->_add_mode_button ($vb, "below floor", "below");
#   $self->_add_mode_button ($vb, "bottom",      "bottom");
#
#   $self->{widget} = $vb;
}

package GCE::EditAction::Pick;
use strict;

our @ISA = qw/GCE::EditAction/;

sub name { 'pick' }

sub want_cursor { 0 }

sub special_arrow { 'GDK_HAND2' }

sub begin {
   my ($self, $map, $x, $y) = @_;

   $self->SUPER::begin ($map, $x, $y);
   $self->edit ($map, $x, $y);
}

sub edit {
   my ($self, $map, $x, $y) = @_;

   my $cstack = $map->get ($x, $y);

   my $arch = $cstack->[-1];

   # virtual... grmbl....
   # FIXME: I have to patch the stack of the real arch??? argl.. how??
   if ($arch->{_virtual}) {
      $x    = $arch->{virtual_x};
      $y    = $arch->{virtual_y};
      $arch = $arch->{_virtual};
      $cstack = $map->get ($x, $y);
   }

   $::MAINWIN->set_pick ($arch)
      if @$cstack;

   $::MAINWIN->update_attr_editor ($arch, sub {
      $map->change_begin (ref $self);
      $map->change_stack ($x, $y, $cstack);
      # XXX: Put this into a generic function!!! See also EditTools.pm
      # FIXME: Fix the automatic update on undo here!
      if (my $changeset = $map->change_end) {
         splice @{ $map->{undo_stack} ||= [] },
                $map->{undo_stack_pos}++, 1e6,
                $changeset;
      }
   });

   $::MAINWIN->update_stack_view ($map, $x, $y);
}

package GCE::EditAction::Perl;

use GCE::Util;
use Gtk2;
use strict;

our @ISA = qw/GCE::EditAction/;

sub name { 'perl' }

sub special_arrow { 'GDK_HEART' }

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

   my $vb = new Gtk2::VBox;
   $vb->pack_start (my $sw = Gtk2::ScrolledWindow->new, 1, 1, 0);
      $sw->add ($self->{txt} = Gtk2::TextView->new);

   $self->tool_widget ($vb);
}

sub want_cursor { 0 }

sub begin {
   my ($self, $map, $x, $y) = @_;

   $self->SUPER::begin ($map, $x, $y);
   $self->edit ($map, $x, $y);
}

sub edit {
   my ($self, $map, $x, $y) = @_;

   my $pick = $::MAINWIN->get_pick;
   my $as = $map->get ($x, $y);

   $as = $self->eval ($map, $pick, $as, $x, $y);
   $map->change_stack ($x, $y, $as); # insert_arch_stack_layer ($as, $arch));
}

sub eval {
   my ($self, $map, $pick, $stack, $x, $y) = @_;
   my $buf = $self->{txt}->get_buffer;
   my $code = $buf->get_text ($buf->get_start_iter, $buf->get_end_iter, 0);

   eval $code;
   return $stack;
}

package GCE::EditAction::Place;
use Storable qw/dclone/;
use GCE::Util;
use Gtk2;
use strict;

our @ISA = qw/GCE::EditAction::RadioModed/;

sub name { 'place' }

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

   my $vb = new Gtk2::VBox;
   $self->add_mode_button ($vb, "auto",        "auto");
   $self->add_mode_button ($vb, "top",         "top");
   $self->add_mode_button ($vb, "above floor", "above");
   $self->add_mode_button ($vb, "below floor", "below");
   $self->add_mode_button ($vb, "bottom",      "bottom");

   $vb->pack_start ($self->{place_clean} = Gtk2::CheckButton->new ('place clean'), 0, 1, 0);

   $self->tool_widget ($vb);
}

sub want_cursor { 0 }

sub begin {
   my ($self, $map, $x, $y) = @_;

   $self->SUPER::begin ($map, $x, $y);
   $self->edit ($map, $x, $y);
}

sub edit {
   my ($self, $map, $x, $y) = @_;

   my $pick = $::MAINWIN->get_pick;
   my $as = $map->get ($x, $y);

   if ($self->{place_clean}->get_active) {
      $pick = { _name => $pick->{_name} };
   }

   $self->stack_action ($as, dclone ($pick));
   $map->change_stack ($x, $y, $as); # insert_arch_stack_layer ($as, $arch));
}

sub end {
   my ($self, $map, $x, $y, $mape) = @_;
   $::MAINWIN->{edit_collection}{pick}->edit ($map, $x, $y);
   $self->SUPER::end ($map, $x, $y, $mape);
}

sub stack_action {
   my ($self, $stack, $arch) = @_;

   my $m = $self->get_mode;

   if ($m eq 'top') {
      if (@$stack == 0 or $stack->[-1]->{_name} ne $arch->{_name}) {
         push @$stack, $arch;
      }

   } elsif ($m eq 'bottom') {
      if (@$stack == 0 or $stack->[0]->{_name} ne $arch->{_name}) {
         unshift @$stack, $arch;
      }

   } elsif ($m eq 'above') {
      my $fidx = stack_find_floor ($stack, 'from_top');

      if (@$stack == 0
          or not ($stack->[$fidx + 1])
          or $stack->[$fidx + 1]->{_name} ne $arch->{_name})
      {
         splice (@$stack, $fidx + 1, 0, $arch);
      }

   } elsif ($m eq 'below') {
      my $fidx = stack_find_floor ($stack, 'from_bottom');

      if (@$stack == 0
          or $fidx == 0
          or not ($stack->[$fidx - 1])
          or $stack->[$fidx - 1]->{_name} ne $arch->{_name})
      {
         splice (@$stack, $fidx, 0, $arch);
      }

   } elsif ($m eq 'auto') {
      my $fidx = stack_find_floor ($stack, 'from_top');
      my $widx = stack_find_wall  ($stack);

      if (arch_is_floor ($arch)) { # we want to place a floor tile

         if (arch_is_floor ($stack->[$fidx])) { # replace
            $stack->[$fidx] = $arch;

         } else { # insert on bottom
            unshift @$stack, $arch;
         }

      } elsif (arch_is_wall ($arch)) { # we want to place a wall

         if (arch_is_wall ($stack->[$widx])) { # replace
            $stack->[$widx] = $arch;

         } else { # insert above floor
            splice (@$stack, $fidx + 1, 0, $arch);
         }

      } else {

         if (arch_is_wall ($stack->[$widx])) {
            # if we have a wall above the floor, replace it with the to place item
            $stack->[$widx] = $arch;
            return;
         }

         if (@$stack == 0
             or not ($stack->[-1])
             or $stack->[-1]->{_name} ne $arch->{_name})
         {
            push @$stack, $arch;
         }
      }
   }
}

package GCE::EditAction::Select;
use GCE::Util;
use Gtk2;
use Crossfire;
use Storable qw/dclone/;
use strict;

our @ISA = qw/GCE::EditAction::RadioModed/;

sub name { 'select' }

sub special_arrow { 'GDK_CIRCLE' }

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

   my $vb = new Gtk2::VBox;

   $vb->pack_start (my $bt = Gtk2::Button->new ("copy"), 0, 1, 0);
      $bt->signal_connect (clicked => sub { $self->copy });
   $vb->pack_start ($self->{paste_top} = Gtk2::CheckButton->new ('paste on top'), 0, 1, 0);
   $vb->pack_start (my $bt = Gtk2::Button->new ("paste"), 0, 1, 0);
      $bt->signal_connect (clicked => sub { $self->paste });
   $vb->pack_start (Gtk2::HSeparator->new, 0, 1, 0);
   $self->add_mode_button ($vb, "place", "place");
   $self->add_mode_button ($vb, "erase", "erase");
   $self->add_mode_button ($vb, "perl", "perl");
   $vb->pack_start (my $bt = Gtk2::Button->new ("invoke"), 0, 1, 0);
      $bt->signal_connect (clicked => sub { $self->invoke });

   $self->tool_widget ($vb);
}

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

   return unless $self->{selection}->{a};
   my ($x1, $y1) = @{$self->{selection}->{a}};
   my ($x2, $y2) = @{$self->{selection}->{b}};

   if ($x1 > $x2) { ($x2, $x1) = ($x1, $x2) }
   if ($y1 > $y2) { ($y2, $y1) = ($y1, $y2) }

   my $map = $self->{selection}->{map};

   $self->{copy_coords} = [$x1, $y1, $x2, $y2];
   $self->{copy};
   for (my $x = $x1; $x <= $x2; $x++) {
      for (my $y = $y1; $y <= $y2; $y++) {
         $self->{copy}->[$x - $x1]->[$y - $y1] = $map->get ($x, $y);
      }
   }
}

sub paste {
   my ($self, $xp, $yp) = @_;

   return unless $self->{selection}->{a};

   my ($x1, $y1);

   if (defined $xp) {
       ($x1, $y1) = ($xp, $yp);
   } else {
       ($x1, $y1) = @{$self->{selection}->{a}};
   }

   my $map = $self->{selection}->{map};

   my $p_o_top = $self->{paste_top}->get_active * 1;

   my $w = $self->{copy_coords}->[2] - $self->{copy_coords}->[0];
   my $h = $self->{copy_coords}->[3] - $self->{copy_coords}->[1];
   $self->{copy};
   $self->SUPER::begin ($map, $x1, $y1);
   for (my $x = $x1; $x <= ($x1 + $w); $x++) {
      for (my $y = $y1; $y <= ($y1 + $h); $y++) {
         my $cstck = $map->get ($x, $y);

         if ($p_o_top) {
            push @$cstck, @{dclone ($self->{copy}->[$x - $x1]->[$y - $y1] || [])};
            $map->change_stack ($x, $y, $cstck);
         } else {
            $map->change_stack ($x, $y, dclone ($self->{copy}->[$x - $x1]->[$y - $y1] || []));
         }
      }
   }
   $self->SUPER::end ($map);
   $map->invalidate_all;
}

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

   return unless $self->{selection}->{a};
   my ($x1, $y1) = @{$self->{selection}->{a}};
   my ($x2, $y2) = @{$self->{selection}->{b}};

   if ($x1 > $x2) { ($x2, $x1) = ($x1, $x2) }
   if ($y1 > $y2) { ($y2, $y1) = ($y1, $y2) }

   my $map = $self->{selection}->{map};

   my $m = $self->get_mode;
   $self->SUPER::begin ($map, $x1, $y1);
   for (my $x = $x1; $x <= $x2; $x++) {
      for (my $y = $y1; $y <= $y2; $y++) {
         if ($m eq 'place') {
            $::MAINWIN->{edit_collection}{place}->edit ($map, $x, $y);
         } elsif ($m eq 'erase') {
            $::MAINWIN->{edit_collection}{erase}->edit ($map, $x, $y);
         } elsif ($m eq 'perl') {
            $::MAINWIN->{edit_collection}{perl}->edit ($map, $x, $y);
         }
      }
   }
   $self->SUPER::end ($map);
}

sub want_cursor { 0 }

sub begin {
   my ($self, $map, $x, $y) = @_;

   delete $self->{selection};

   $self->{selection}->{a} = [$x, $y];
   $self->edit ($map, $x, $y);
}

sub end {
}

sub edit {
   my ($self, $map, $x, $y) = @_;

   $self->{selection}->{b} = [$x, $y];
   $self->{selection}->{map} = $map;
   $self->update_overlay ($map);
}

sub update_overlay {
   my ($self, $map) = @_;

   my ($x1, $y1) = @{$self->{selection}->{a}};
   my ($x2, $y2) = @{$self->{selection}->{b}};

   if ($x1 > $x2) { ($x2, $x1) = ($x1, $x2) }
   if ($y1 > $y2) { ($y2, $y1) = ($y1, $y2) }

   my $w = ($x2 - $x1) + 1;
   my $h = ($y2 - $y1) + 1;

   $map->overlay (selection =>
      $x1 * TILESIZE, $y1 * TILESIZE,
      $w * TILESIZE, $h * TILESIZE,
      sub {
         my ($self, $x, $y) = @_;
         $self->{window}->draw_rectangle (
            $_ & 1 ? $self->style->black_gc : $self->style->white_gc,
            0,
            $x + $_, $y + $_,
            ($w * TILESIZE) - 1 - $_ * 2,
            ($h * TILESIZE) - 1 - $_ * 2
         ) for 0..3;
      }
   );
}

package GCE::EditAction::Erase;
use GCE::Util;
use Gtk2;
use strict;

our @ISA = qw/GCE::EditAction::RadioModed/;

sub name { 'erase' }

sub want_cursor { 0 }

sub special_arrow { 'GDK_DIAMOND_CROSS' }

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

   my $vb = new Gtk2::VBox;
   $self->add_mode_button ($vb, "top",         "top");
   $self->add_mode_button ($vb, "walls",       "walls");
   $self->add_mode_button ($vb, "above floor", "above", 'default');
   $self->add_mode_button ($vb, "floor",       "floor");
   $self->add_mode_button ($vb, "below floor", "below");
   $self->add_mode_button ($vb, "bottom",      "bottom");
   $self->add_mode_button ($vb, "pick match",  "match");

   $self->tool_widget ($vb);

   $vb->pack_start ($self->{no_wall_check} = Gtk2::CheckButton->new ("exclude walls"), 0, 1, 0);
   $vb->pack_start ($self->{no_monsters_check} = Gtk2::CheckButton->new ("exclude monsters"), 0, 1, 0);
}

sub check_excluded {
   my ($self, $arch) = @_;

my $a1 = $self->{no_monsters_check}->get_active;
my $a2 = $self->{no_wall_check}->get_active;

  my $r = ($self->{no_wall_check}->get_active     && arch_is_wall ($arch))
       || ($self->{no_monsters_check}->get_active && arch_is_monster ($arch));
  return $r;
}

sub begin {
   my ($self, $map, $x, $y) = @_;

   $self->SUPER::begin ($map, $x, $y);
   $self->edit ($map, $x, $y);
}

sub edit {
   my ($self, $map, $x, $y) = @_;

   my $as = $map->get ($x, $y);
   $self->stack_action ($as);
   $map->change_stack ($x, $y, $as);
}

sub stack_action {
   my ($self, $stack) = @_;

   my $m = $self->get_mode;

   if ($m eq 'top') {
      pop @$stack;

   } elsif ($m eq 'bottom') {
      shift @$stack;

   } elsif ($m eq 'above') {
      my $fidx = stack_find_floor ($stack, 'from_top');

      if (arch_is_floor ($stack->[$fidx]) and $stack->[$fidx + 1]) {
         splice (@$stack, $fidx + 1, 1)
            unless $self->check_excluded ($stack->[$fidx + 1])

      } elsif (not arch_is_floor ($stack->[$fidx])) {
         splice (@$stack, $fidx, 1)
            unless $self->check_excluded ($stack->[$fidx])

      }

   } elsif ($m eq 'below') {
      my $fidx = stack_find_floor ($stack, 'from_bottom');

      if ($fidx > 0 and not arch_is_floor ($stack->[$fidx - 1])) {
         splice (@$stack, $fidx - 1, 1) 
            unless $self->check_excluded ($stack->[$fidx - 1])

      } elsif (not arch_is_floor ($stack->[$fidx])) { # no floor found
         splice (@$stack, $fidx, 1)
            unless $self->check_excluded ($stack->[$fidx])

      }

   } elsif ($m eq 'walls') {
      my $widx = stack_find_wall ($stack, 'from_top');

      while (arch_is_wall ($stack->[$widx])) {
         splice (@$stack, $widx, 1);
         $widx = stack_find_wall ($stack, 'from_top')
      }

   } elsif ($m eq 'floor') {
      my $fidx = stack_find_floor ($stack, 'from_top');

      while (arch_is_floor ($stack->[$fidx])) {
         splice (@$stack, $fidx, 1);
         $fidx = stack_find_floor ($stack, 'from_top')
      }

   } elsif ($m eq 'match') {
      my $pick_name = $::MAINWIN->get_pick ()->{_name};
      my $idx = stack_find ($stack, 'from_top', sub { $_[0]->{_name} eq $pick_name });

      while ($stack->[$idx] and $stack->[$idx]->{_name} eq $pick_name) {
         splice (@$stack, $idx, 1);
         $idx = stack_find ($stack, 'from_top', sub { $_[0]->{_name} eq $pick_name });
      }
   }
}

package GCE::EditAction::Connect;
use Storable qw/dclone/;
use GCE::Util;
use Gtk2;
use File::Spec::Functions;
use strict;

our @ISA = qw/GCE::EditAction::RadioModed/;

sub name { 'connect' }

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

   my $vb = new Gtk2::VBox;
   $self->add_mode_button ($vb, "exit", "exit");
#   $self->add_mode_button ($vb, "triggers",    "trig");
   $vb->pack_start ($self->{sel_lbl} = Gtk2::Label->new, 0, 0, 0);
   $self->tool_widget ($vb);
}

sub want_cursor { 0 }

sub begin {
   my ($self, $map, $x, $y, $mapedit) = @_;

   $self->edit ($map, $x, $y, $mapedit);
}

sub edit {
   my ($self, $map, $x, $y, $mapedit) = @_;

   my $pick = $::MAINWIN->get_pick;
   my $as = $map->get ($x, $y);

   my $exit;
   for (@$as) {
      my $a = $Crossfire::ARCH{$_->{_name}};
      if ($a->{type} eq '66') {
         $exit = $_;
      }
   }

   if ($exit) {
      if ($self->{sel_exit}) {
         my $ent = catfile ($Crossfire::LIB, 'maps');

         $exit->{hp}      = $self->{sel_exit}->[3];
         $exit->{sp}      = $self->{sel_exit}->[4];
         $exit->{slaying} = File::Spec->abs2rel ($self->{sel_exit}->[5], $ent);

         my $exit2 = $self->{sel_exit}->[0];

         $exit2->{hp} = $x;
         $exit2->{sp} = $y;
         $exit2->{slaying} = File::Spec->abs2rel ($mapedit->{path}, $ent);

         unless ($exit2->{slaying} =~ m/^\.\./) {
            $exit2->{slaying} = '/' . $exit2->{slaying};
         }
         unless ($exit->{slaying} =~ m/^\.\./) {
            $exit->{slaying} = '/' . $exit->{slaying};
         }

         $self->SUPER::begin ($map, $x, $y, $mapedit);
         $map->change_stack ($x, $y, $as);
         $self->SUPER::end ($map);
         $self->SUPER::begin ($self->{sel_exit}->[1], $exit->{hp}, $exit->{sp});
         $self->{sel_exit}->[1]->change_stack ($exit->{hp}, $exit->{sp}, $self->{sel_exit}->[2]);
         $self->SUPER::end ($self->{sel_exit}->[1]);

         quick_msg ($mapedit, "$exit->{slaying} ($x:$y) $exit->{_name} <=> $exit2->{slaying} ($exit2->{hp}:$exit2->{sp}) $exit2->{_name}", 0);

         $::MAINWIN->{edit_collection}{pick}->edit ($map, $x, $y);

         $self->{sel_exit} = undef;
         $self->{sel_lbl}->set_text ('');
      } else {
         $self->{sel_lbl}->set_text ("src: ($x:$y) $exit->{_name}");
         $self->{sel_exit} = [$exit, $map, $as, $x, $y, $mapedit->{path}];
      }
   } else {
      quick_msg ($mapedit, "no exit object found");
   }

#   $self->stack_action ($as, dclone ($pick));
#$map->change_stack ($x, $y, $as); # insert_arch_stack_layer ($as, $arch));
}

sub end {}


=head1 AUTHOR

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

 Robin Redeker <elmex@ta-sa.org>
 http://www.ta-sa.org/

=cut

1