#!/usr/bin/env perl
#
# 2018/01/17 Gabriel Moreau
#
# apt-get install libyaml-syck-perl libtemplate-perl

use strict;
use warnings;

use File::Copy qw{copy};    
use YAML::Syck;
use Getopt::Long();
use Cwd();
use Template;


my ($verbose);
Getopt::Long::GetOptions(
   'verbose' => \$verbose,
   );


my %CMD_DB = (
   'help'            => \&cmd_help,
   'version'         => \&cmd_version,
   'check'           => \&cmd_check,
   'make-link'       => \&cmd_make_link,
   'make-author'     => \&cmd_make_author,
   'make-licence'    => \&cmd_make_licence,
   );

################################################################
# main program
################################################################

my $cmd = shift @ARGV || 'help';
if (defined $CMD_DB{$cmd}) {
   $CMD_DB{$cmd}->(@ARGV);
   }
else {
   print {*STDERR} "project-meta: command $cmd not found\n\n";
   $CMD_DB{'help'}->();
   exit 1;
   }

exit;

################################################################
# subroutine
################################################################

################################################################
# command
################################################################

sub cmd_help {
   print <<END;
NAME
   $0 - action on project metadata

SYNOPSIS
   $0 [-verbose] check
END
   }

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

sub cmd_version {
   print "0.01\n";
   }

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

sub print_ok {
   my ($key, $test) = @_;
   
   printf "%-35s : %s\n", $key, $test ? 'yes' : 'no';
   }

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

sub cmd_check {
   my $meta = YAML::Syck::LoadFile("PROJECT-META.yml");

   my $acronym     = $meta->{'project'}{'acronym'};
   my $current_dir = Cwd::getcwd();
   my $dap_folder  = $meta->{'public-dap'}{'dap-folder'};

   print_ok 'project/acronym',                  $acronym =~ m{\d\d\w[\w\d_]+};
   print_ok 'public-dap/dap-folder',            $dap_folder ne '' and $dap_folder =~ m{^/};
   print_ok 'dap-folder not match current_dir', $dap_folder !~ m{$current_dir};

   #print YAML::Syck::Dump($meta);
   }

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

sub addfolder2list {
   my ($folderdb, $folder) = @_;
   
   $folder =~ s{/[^/]+$}{};
   $folderdb->{$folder}++;

   addfolder2list($folderdb, $folder) if $folder =~ m{/};
   }

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

sub cmd_make_link {
   my $meta = YAML::Syck::LoadFile("PROJECT-META.yml");
   my $acronym = $meta->{'project'}{'acronym'};
   my $current_dir = Cwd::getcwd();
   my $dap_folder = $meta->{'public-dap'}{'dap-folder'};

   # Create a list of the folder
   my %folders;
   for my $dataset (@{$meta->{'public-dap'}{'data-set'}}) {
      addfolder2list(\%folders, $dataset);
      }

   print "chmod o+rX,o-w $current_dir\n";
   for my $folder (sort keys %folders) {
      print "chmod o+rX,o-w $current_dir/$folder\n";
      print "mkdir -p $dap_folder/$acronym/$folder\n";
      }

   for my $dataset (@{$meta->{'public-dap'}{'data-set'}}) {
      my $folder = $dataset =~ s{/[^/]+$}{}r;
      print "ln --symbolic --target-directory $dap_folder/$acronym/$folder/ $current_dir/$dataset\n";

   print "chmod -R o+rX,o-w $dap_folder/$acronym/\n";
      }
   }

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

sub cmd_make_author {
   my $meta = YAML::Syck::LoadFile("PROJECT-META.yml");

   my $current_dir = Cwd::getcwd();
   my $template_author = '/usr/share/project-meta/template.d/AUTHORS.tt';

   my $acronym    = $meta->{'project'}{'acronym'};
   my $authors_list = $meta->{'project'}{'authors'};

   if (-f "$current_dir/AUTHORS.txt") {
      # Test for manual or automatically generated file
      # Automatically generated file by project-meta
      my $automatic;
      open my $fh,  '<', "$current_dir/AUTHORS.txt" or die $!;
      for my $line <$fh> {
         $line =~ m/Automatically generated .* project-meta/i and $automatic++;
         }
      close $fh;

      if (not $automatic) {
         print "Warning: AUTHORS.txt already exists\n";
         return;
         }

      print "Warning: update AUTHORS.txt\n";
      }

   my $tt = Template->new(INCLUDE_PATH => '/usr/share/project-meta/template.d');
   my $msg_format = '';
   $tt->process('AUTHORS.tt',
      {
         acronym    => $acronym,
         authorlist => $authors_list,
      }, \$msg_format) || die $tt->error;

   open my $fh,  '>', "$current_dir/AUTHORS.txt" or die $!;
   print $fh "$msg_format\n\n";
   close $fh;
   }

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

sub cmd_make_licence {
   my $meta = YAML::Syck::LoadFile("PROJECT-META.yml");

   my $current_dir = Cwd::getcwd();

   if (-f "$current_dir/LICENCE.txt") {
      print "Warning: LICENCE.txt already exists\n";
      return;
      }

   my $licence = $meta->{'public-dap'}{'data-licence'};

   if (not -f "/usr/share/project-meta/licence.d/$licence.txt") {
      print "Error: licence $licence doesn't exists in project-meta database\n";
      exit 1;
      }

   copy("/usr/share/project-meta/licence.d/$licence.txt", "$current_dir/LICENCE.txt")
      or die "Error: licence copy failed - $!";

   print "Info: LICENCE.txt file create\n";
   return;
   }

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