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package GvaScript_Builder;
use base 'Module::Build';

use strict;

use warnings;

# some files in the distribution are derived from pod and pm sources
# so we regenerate them when doing actions "build" or "distdir"

sub ACTION_build{
  my $self = shift;
  $self->generate_from_sources;
  $self->SUPER::ACTION_build();
}

sub ACTION_distdir{
  my $self = shift;
  $self->generate_from_sources;
  $self->SUPER::ACTION_distdir();
}


sub ACTION_wiki {
  my ($self) = @_;
  $self->generate_googlewiki;
}

sub generate_from_sources {
  my ($self) = @_;
  $self->generate_js;
  eval {$self->generate_html};       # might fail if Pod::POM is not installed
}


sub generate_js { # concatenates sources below into "GvaScript.js"
  my ($self) = @_;
  require "lib/Alien/GvaScript.pm";

  my @sources = qw/protoExtensions event keyMap 
                   treeNavigator choiceList autoCompleter
                   customButtons paginator grid
                   repeat form/;
  my $dest = "lib/Alien/GvaScript/lib/GvaScript.js";
  chmod 0777, $dest;
  open my $dest_fh, ">$dest"  or die "open >$dest : $!";

  print $dest_fh <<__EOJS__;
/*-------------------------------------------------------------------------*
 * GvaScript - Javascript framework born in Geneva.
 *
 *  Authors: Laurent Dami            <laurent.d...\@etat.ge.ch>
 *           Mona Remlawi
 *           Jean-Christophe Durand
 *           Sebastien Cuendet

 *  LICENSE
 *  This library is free software, you can redistribute it and/or modify
 *  it under the same terms as Perl's artistic license.
 *
 *--------------------------------------------------------------------------*/

var GvaScript = {
  Version: '$Alien::GvaScript::VERSION',
  REQUIRED_PROTOTYPE: '1.7',
  load: function() {
    function convertVersionString(versionString) {
      var v = versionString.replace(/_.*|\\./g, '');
      v = parseInt(v + '0'.times(4-v.length));
      return versionString.indexOf('_') > -1 ? v-1 : v;
    }
    if((typeof Prototype=='undefined') ||
       (typeof Element == 'undefined') ||
       (typeof Element.Methods=='undefined') ||
       (convertVersionString(Prototype.Version) <
        convertVersionString(GvaScript.REQUIRED_PROTOTYPE)))
       throw("GvaScript requires the Prototype JavaScript framework >= " +
        GvaScript.REQUIRED_PROTOTYPE);
  }
};

GvaScript.load();
__EOJS__

  foreach my $sourcefile (@sources) {
    open my $fh, "src/$sourcefile.js" or die $!;
    print $dest_fh "\n//----------$sourcefile.js\n", <$fh>;
  }
}

sub generate_html {# regenerate html doc from pod sources
  my ($self) = @_;

  require Pod::POM;
  require Pod::POM::View::HTML;

  my @podfiles = glob ("lib/Alien/GvaScript/*.pod");
  my $parser = new Pod::POM;

  foreach my $podfile (@podfiles) {
    my $pom = $parser->parse($podfile) or die $parser->error;
    $podfile =~ m[^lib/Alien/GvaScript/(.*)\.pod];
    my $htmlfile = "doc/html/$1.html";
    print STDERR "converting $podfile ==> $htmlfile\n";
    open my $fh, ">$htmlfile" or die "open >$htmlfile: $!";