#!/usr/bin/perl -w
#
#  rhrdlibs
#
#  Copyright (C) 2015-2016 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 RHRD::rddb;
use RHRD::utils;
use Date::Calc;

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

sub list
{
  my ($ctx, $group) = @_;

  my @shows = RHRD::rddb::list_shows($ctx, $group);
  if(!defined $shows[0] && defined $shows[1]) {
    print STDERR "$shows[1]: $shows[2]";
    return 1;
  }
  my @sorted =  sort { lc($a->{'TITLE'}) cmp lc($b->{'TITLE'}) } @shows;
  for my $href (@sorted) {
    print $href->{'ID'} . ": " . $href->{'TITLE'} . "\n";
  }
  return 0;
}

sub search
{
  my ($ctx, $searchexp) = @_;

  my @shows = RHRD::rddb::list_shows($ctx);
  if(!defined $shows[0] && defined $shows[1]) {
    print STDERR "$shows[1]: $shows[2]";
    return 1;
  }
  my @sorted =  sort { lc($a->{'TITLE'}) cmp lc($b->{'TITLE'}) } @shows;
  for my $show (@sorted) {
    next unless $show->{'TITLE'} =~ /$searchexp/i;

    $show->{'DOW'} = 7 if $show->{'DOW'} == 0;
    print $show->{'ID'} . ": " . $show->{'TITLE'} . ", ";
    print join(", ", $show->{'RHYTHM'}, Date::Calc::Day_of_Week_to_Text($show->{'DOW'}), $show->{'STARTTIME'}, ($show->{'LEN'} . " min"));
    print ", group: " . $show->{'GROUP'} . "\n";
  }
  return 0;
}

sub show
{
  my ($ctx, $showid) = @_;

  my @carts = RHRD::rddb::get_show_carts($ctx, $showid);
  if(!defined $carts[0] && defined $carts[1]) {
    print STDERR "$carts[1]: $carts[2]\n";
    return 1;
  }
  my ($show, $status, $errorstring) = RHRD::rddb::get_show_info($ctx, $showid);
  unless (defined $show) {
    print STDERR "$errorstring\n";
    return 1;
  }
  $show->{'DOW'} = 7 if $show->{'DOW'} == 0;
  print $show->{'TITLE'} . ": " . join(", ", $show->{'RHYTHM'}, Date::Calc::Day_of_Week_to_Text($show->{'DOW'}), $show->{'STARTTIME'}, ($show->{'LEN'} . " min")) . "\n";
  print " group: " . $show->{'GROUP'} . ", carts(" . scalar(@carts) . "): " . join(", ", @carts) . " \n";
  return 0;
}


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

  if($groupname !~ m/^[-a-zA-Z0-9_]{1,10}$/) {
    print STDERR "name '" . $groupname . "' contains illegal characters or is too long/short\n";
    print STDERR "  only a-z, A-Z, 0-9 and _,- are allowed and the length must be between 1 and 10\n";
    return 1;
  }

  if($name !~ m/^[a-zA-Z0-9_]{1,10}$/) {
    print STDERR "name '" . $name . "' contains illegal characters or is too long/short\n";
    print STDERR "  only a-z, A-Z, 0-9 and _ are allowed and the length must be between 1 and 10\n";
    return 1;
  }

  if($num_carts <= 0) {
    print STDERR "num-carts '" . $num_carts . "' must be > 0\n";
    return 1;
  }

  my ($result, $err, $hint) = RHRD::utils::dropbox_param_rhythm_ok($rhythm);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  ($result, $err, $hint) = RHRD::utils::cmdline_dow($dow);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  ($result, $err, $hint) = RHRD::utils::dropbox_param_starttime_ok($starttime);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  ($result, $err, $hint) = RHRD::utils::dropbox_param_len_ok($len);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  return 0;
}

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

  my $ret = add__check_arguments($groupname, $name, $title, $num_carts, $rhythm, $dow, $starttime, $len);
  if($ret) {
    return $ret;
  }
  ($dow, undef, undef) = RHRD::utils::cmdline_dow($dow);

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

  my ($result, $status, $errorstring) = RHRD::rddb::check_group($ctx, $groupname);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }

  my $low_cart = 0;
  if($result) {
    print " * using existing group '" . $groupname . "'\n";
    ($low_cart, $status, $errorstring) = RHRD::rddb::get_next_free_show_group_carts($ctx, $groupname, $num_carts);
  } else {
    print " * '" . $groupname . "' does not exist - creating it\n";
    ($low_cart, $status, $errorstring) = RHRD::rddb::create_show_group($ctx, $groupname);
  }
  unless(defined $low_cart) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }

  my $high_cart = $low_cart + $num_carts - 1;
  print " * will be using carts: " . $low_cart . " - " . $high_cart . "\n";

  ($result, $status, $errorstring) = RHRD::rddb::create_show_log($ctx, $name, $low_cart, $high_cart);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }
  print " * created log with name: " . $name . "\n";

  (my $showid, $status, $errorstring) = RHRD::rddb::create_show_macro_cart($ctx, $name, $title);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }
  print " * created macro cart -> new show-id = " . $showid . "\n";

  ($result, $status, $errorstring) = RHRD::rddb::create_show_dropbox($ctx, $groupname, $showid, $rhythm, $dow, $starttime, $len);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }
  print " * created dropbox for show .. " . $result . " rows affected\n";

  print " * finished\n";

  return 0;
}


sub edit__check_arguments
{
  my ($showid, $title, $rhythm, $dow, $starttime, $len) = @_;

  my ($result, $err, $hint) = RHRD::utils::dropbox_param_rhythm_ok($rhythm);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  ($result, $err, $hint) = RHRD::utils::cmdline_dow($dow);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  ($result, $err, $hint) = RHRD::utils::dropbox_param_starttime_ok($starttime);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  ($result, $err, $hint) = RHRD::utils::dropbox_param_len_ok($len);
  unless($result) {
    print STDERR $err . "\n " . $hint . "\n";
    return 1;
  }

  return 0;
}

sub edit
{
  my ($ctx, $showid, $title, $rhythm, $dow, $starttime, $len) = @_;

  my $ret = edit__check_arguments($showid, $title, $rhythm, $dow, $starttime, $len);
  if($ret) {
    return $ret;
  }
  ($dow, undef, undef) = RHRD::utils::cmdline_dow($dow);

  my ($result, $status, $errorstring) = RHRD::rddb::update_show_title($ctx, $showid, $title);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }
  if ($result != 1) {
    print "show '" . $showid ."' does not exist.\n";
    return 1;
  }

  ($result, $status, $errorstring) = RHRD::rddb::update_show_dropbox($ctx, $showid, $rhythm, $dow, $starttime, $len);
  unless(defined $result) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }
  if ($result != 1) {
    print "show '" . $showid ."' does not exist.\n";
    return 1;
  }

  print "show '" . $showid . "' successfully changed!\n";
  return 0;
}

sub remove
{
  my ($ctx, $showid) = @_;

  my ($group, $status, $errorstring) = RHRD::rddb::get_show_group($ctx, $showid);
  unless(defined $group) {
    print STDERR $status . ": " . $errorstring . "\n";
    return 1;
  }

  my @results = RHRD::rddb::remove_show($ctx, $showid);
  if(!defined $results[0] && defined $results[2]) {
    print STDERR $results[1] . ": " . $results[2] . "\n";
    return 1;
  }
  for my $href (@results) {
    print int($href->{cnt}) . " " . $href->{name} . " deleted\n";
  }

  my @carts = RHRD::rddb::get_show_group_carts_used($ctx, $group);
  if(!defined $carts[0] && defined $carts[1]) {
    print STDERR $carts[1] . ": " . $carts[2] . "\n";
    return 1;
  }
  if(scalar @carts == 0) {
    print ">>  group '" . $group . "' is now empty .. you should probably remove it!\n\n";
  }

  my @args = ($showid);
  my ($ret, $log) = RHRD::utils::pv_execute_action('remove_automation_id', undef, @args);
  if($ret) {
    print "Error: removing showid from PV failed:";
    print $log;
  } else {
    print "removed show $showid from PV\n";
  }

  return 0;
}

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

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

exit $ret;