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#!/usr/bin/perl -w
#
#  rhrdlibs
#
#  Copyright (C) 2015 Christian Pointner <equinox@helsinki.at>
#
#  This file is part of rhrdlibs.
#
#  rhrdlibs is free software: you can redistribute it and/or modify
#  it under the terms of the GNU Affero General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  any later version.
#
#  rhrdlibs is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU Affero General Public License for more details.
#
#  You should have received a copy of the GNU Affero General Public License
#  along with rhrdlibs. If not, see <http://www.gnu.org/licenses/>.
#

use strict;
use lib "../lib/";
use RHRD::rddb;

# this is ridiculous but makes it a little harder to create/remove users...
# if ($> != 0 ) {
#   print STDERR "this must be run as root!\n";
#   exit 1;
# }

sub print_usage
{
  print STDERR "Usage: rd-show list\n" .
               "       rd-show (show|remove) <show-id>\n" .
               "       rd-show add <groupname> <name> <title> <num-carts> <rhythm> <dow> <starttime> <len>\n";
}

sub list
{
  my ($dbh) = @_;

  my @shows = RHRD::rddb::list_shows($dbh);
  if(!defined $shows[0] && defined $shows[1]) {
    print STDERR "$shows[1]: $shows[2]";
    return 1;
  }
  for my $href (@shows) {
    print $href->{'ID'} . ": " . $href->{'TITLE'} . "\n";
  }
  return 0;
}

sub show
{
  my ($dbh, $show_id) = @_;

  my @carts = RHRD::rddb::get_show_carts($dbh, $show_id);
  if(!defined $carts[0] && defined $carts[1]) {
    print STDERR "$carts[1]: $carts[2]\n";
    return 1;
  }
  my ($title, undef, $status, $errorstring) = RHRD::rddb::get_show_title_and_log($dbh, $show_id);
  unless (defined $title) {
    print STDERR "$errorstring\n";
    return 1;
  }
  print $title . ":\n";
  for my $cart (@carts) {
    print " > " . $cart . "\n";
  }
  return 0;
}



sub add__create_group
{
  my ($dbh, $groupname) = @_;

  print "   > '" . $groupname . "' does not exist - creating it .. ";
  my ($cnt, $status, $errorstring) = RHRD::rddb::add_group($dbh, $groupname);
  unless(defined $cnt) {
    print STDERR $status . ": " . $errorstring . "\n";
    return undef;
  }
  print int($cnt) . " rows affected\n";

  (my $low_cart, my $high_cart, $errorstring) = RHRD::rddb::get_shows_next_free_slot($dbh);
  if(!$low_cart) {
    print $high_cart . ": " . $errorstring . "\n";
    return undef;
  }
  print "     using carts " . $low_cart . " - " . $high_cart . " for new group .. ";

  ($cnt, $status, $errorstring) = RHRD::rddb::set_group_carts($dbh, $groupname, $low_cart, $high_cart, 1, 'Y');
  unless(defined $cnt) {
    print STDERR $status . ": " . $errorstring . "\n";
    return undef;
  }
  print int($cnt) . " rows affected\n";

  print "     enabling reports  .. ";
  ($cnt, $status, $errorstring) = RHRD::rddb::set_group_reports($dbh, $groupname, 'Y', 'Y', 'Y');
  unless(defined $cnt) {
    print STDERR $status . ": " . $errorstring . "\n";
    return undef;
  }
  print int($cnt) . " rows affected\n";

  return $low_cart;
}

sub add__get_group_carts
{
  my ($dbh, $groupname, $num_carts) = @_;

  my ($result, $status, $errorstring) = RHRD::rddb::check_group($dbh, $groupname);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return undef;
  }

  my $low_cart = 0;
  if($result) {
    print "   > using existing group '" . $groupname . "'\n";
    # TODO:
    #   find free range in group which is big enough for $num_carts carts

  } else {
    $low_cart = add__create_group($dbh, $groupname);
  }

  return $low_cart;
}

sub add
{
  my ($dbh, $groupname, $name, $title, $num_carts, $rhythm, $dow, $starttime, $len) = @_;

  print " * creating show: " . $title . " (" . $name . ") for group '" . $groupname . "'\n";

  my $low_cart = add__get_group_carts($dbh, $groupname, $num_carts);
  return 1 unless defined($low_cart);
  my $high_cart = $low_cart + $num_carts - 1;
  print " * will be using carts: " . $low_cart . " - " . $high_cart . "\n";

  # TODO:
  #   create log named <name> and fill with $low_cart - $high_cart
  #   create macro cart referencing log -> show-id
  #   create dropbox for: groupname, show-id, $rhythm, $dow, $starttime, $len

  print " * finished\n";

  return 0;
}

sub remove
{
  my ($dbh, $show_id) = @_;

  print "removing show " . $show_id . ", not yet implemented!\n";
  return 0;
}

my $num_args = $#ARGV + 1;
if($num_args < 1) {
  print_usage();
  exit(1);
}
my $cmd = $ARGV[0];
my $ret = 0;

my ($dbh, $status, $errorstring) = RHRD::rddb::opendb();
if(defined $dbh) {
  if($cmd eq "list") {
    if($num_args != 1) {
      print_usage();
      $ret = 1;
    } else {
      $ret = list($dbh)
    }
  }
  elsif($cmd eq "show") {
    if($num_args != 2) {
      print_usage();
      $ret = 1;
    } else {
      $ret = show($dbh, $ARGV[1])
    }
  }
  elsif($cmd eq "remove") {
    if($num_args != 2) {
      print_usage();
      $ret = 1;
    } else {
      $ret = remove($dbh, $ARGV[1]);
    }
  }
  elsif($cmd eq "add") {
    if($num_args != 9) {
      print_usage();
      $ret = 1;
    } else {
      $ret = add($dbh, $ARGV[1], $ARGV[2], $ARGV[3], $ARGV[4], $ARGV[5], $ARGV[6], $ARGV[7], $ARGV[8]);
    }
  }
  else {
    print_usage();
    $ret = 1;
  }
  RHRD::rddb::closedb($dbh);
} else {
  print STDERR "$errorstring\n";
  $ret = 1;
}

exit $ret;