#!/usr/bin/perl
use strict;
use Image::Magick;

# auxiliary variables
my $img_id = 0;                #loop index
my @ordered_squares;
my $rotation = 180;

#Width and Height of each box, squares per side
my $box_width        = 300;
my $box_height       = $box_width;
my $square_dist      = 100 + $box_width;
my $squares_per_side = 4;

my %special_squares = (          #first field is the position
  0 => "NO\tGo\tGood Luck",       # in the square sequence
  3 => "NO\tChance\ttake yours",
  6 => "NO\tFree Parking\t",
  9 => "NO\tJail\ttoo bad!"
);

# Create and prepare the big, white background image
my $board_size = ($box_width + $square_dist)*$squares_per_side;
my ($image, $current_x) = Image::Magick->new;
$image->Set(size => $board_size . 'current_x' . $board_size);
$image->ReadImage("xc:white");

# Read picture names, captions and other info from the data files,
# inserting the special squares in the right places
open  my $picture_list, '<', 'pictures_data.txt' or die "Cannot open pictures data file!\n";
while (<$picture_list>) {
  if (defined ($special_squares{$img_id})) {
      push @ordered_squares, $special_squares{$img_id} ;
      $img_id++;
  }
  chomp;
  push @ordered_squares, $_;
  $img_id++;
}
close $picture_list;

# now add all the squares to the board
#initial coordinates
my $current_x = 100;
my $current_y = 100;

for ($img_id = 0; $img_id <= $#ordered_squares; $img_id++) {

  my ($pic_name, $caption, $price) = split "\t",  $ordered_squares[$img_id];

  # draw a box, add the captions in it and save it in /tmp/tmp_image.jpg
  draw_border_add_captions($box_width, $box_height, $caption, $price);

  # if there is a current picture, resize it and put it
  # at the center of the temporary image
  insert_picture($pic_name, $box_width - 40, $box_height - 120) unless $pic_name =~ m/^NO$/;

  my $tmp_image;
  $tmp_image = Image::Magick->new;
  $tmp_image->ReadImage("/tmp/tmp_image.jpg");
  $tmp_image->Rotate( degrees => $rotation ) if $rotation > 0;
  # place the current square at the right position on the board
  $image->Composite( image => $tmp_image, compose => 'over', geometry => "+$current_y+$current_x");

  #calculate new rotation value and origin of the next square;
  # if index is a multiple of $squares_per_side
  # we've reached a corner of the board, let's increase image rotation
  $rotation += 90 if (($img_id > 0 ) && ( $img_id % ( $squares_per_side - 1) == 0));
  $rotation -= 360 if ($rotation >= 360);

  if($rotation == 180) {
    $current_y = $current_y  + $square_dist ;
  } elsif ($rotation == 270) {
    $current_x = $current_x  + $square_dist; 
  } elsif ($rotation == 0) {
    $current_y = $current_y  - $square_dist;
  } elsif ($rotation == 90) {
    $current_x = $current_x  - $square_dist;
  } else {
    die "wrong Rotation value: $rotation\n";
  }

}

# add central slogan and save
$image->Annotate(
  text      => 'Linux Format rules!',
  stroke    => "red",
  pointsize => 90,
  rotate    => 215,
  current_x => int($board_size*0.4),
  y         => int($board_size*0.4)
);
$image->write("jpg:board.jpg");

sub draw_border_add_captions  {
  my ($box_width, $box_height, $caption, $price) = @_;

  my $tmp_image;
  $tmp_image = Image::Magick->new;
  $tmp_image->Set( size => "${box_width}current_x$box_height" );
  $tmp_image->ReadImage("xc:white");

  my $x_line_start = 10;
  my $y_line_start = 10;
  my $x_line_end   = 10;
  my $y_line_end   = $box_width -10;

  $tmp_image->Draw(
    stroke    => "red",
    primitive => "line",
    points    => "$y_line_start,$x_line_start $y_line_end,$x_line_end"
  );

  my $x_line_start = 10;
  my $y_line_start = $box_width - 10;
  my $x_line_end   = $box_height - 10;
  my $y_line_end   = $box_width - 10;

  $tmp_image->Draw(
    stroke    => "blue",
    primitive => "line",
    points    => "$y_line_start,$x_line_start $y_line_end,$x_line_end"
  );

  my $x_line_start = $box_height - 10;
  my $y_line_start = $box_width - 10;
  my $x_line_end   = $box_height - 10;
  my $y_line_end   = 10;

  $tmp_image->Draw(
    stroke    => "green",
    primitive => "line",
    points    => "$y_line_start,$x_line_start $y_line_end,$x_line_end"
  );

  my $y_line_start   = 10;
  my $x_line_start   = $box_height - 10;
  my $x_line_end     = 10;
  my $y_line_end     = 10;
  $tmp_image->Draw(
    stroke    => "red",
    primitive => "line",
    points    => "$y_line_start,$x_line_start $y_line_end,$x_line_end"
  );
  #add Caption and price to temporary image
  $tmp_image->Annotate( text => $caption, stroke =>"blue", pointsize=> 24, current_x => 20, y => 10 + int($box_height * 0.75 + 20));
  $tmp_image->Annotate( text => $price,   stroke =>"red",  pointsize=> 16, current_x => 40, y => 10 + int($box_height * 0.75 + 40));
  $tmp_image->write("jpg:/tmp/tmp_image.jpg");
}

sub insert_picture {
  my ($pic_name, $width, $height) = @_;
  my $current_pic = Image::Magick->new;
  $current_pic->ReadImage($pic_name);
  $current_pic->Resize(width => $width, height => $height);

  my $tmp_image;
  $tmp_image = Image::Magick->new;
  $tmp_image->ReadImage("/tmp/tmp_image.jpg");

  #put the current picture at the center of the temporary image
  $tmp_image->Composite(image => $current_pic, compose => 'over', geometry => "+20+20");
  $tmp_image->write("jpg:/tmp/tmp_image.jpg");
}