#!/usr/bin/perl -w
#
#
#  rhimport
#
#  Copyright (C) 2009 Christian Pointner <equinox@helsinki.at>
#
#  This file is part of rhimport.
#
#  rhimport is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  any later version.
#
#  rhimport 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 General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with rhimport. If not, see <http://www.gnu.org/licenses/>.
#

use strict;
use DBI;
use Date::Calc;
use XML::Feed;
use XML::Feed::Entry;
use XML::Feed::Content;
use XML::Feed::Enclosure;
use File::Fetch;
use IO::Handle;
use IPC::Open3;
use HTML::Entities;
use LWP::Simple;

use lib '/usr/local/share/rhimport/';
use rhimport;

my $DBHOST = "airplay";
my $DBUSER = "rivendell";
my $DBPW = "lldriven";
my $DB = "rivendell";

my $STAT_FILE = $ENV{'HOME'} . "/rhimport-rs.stat";
my $RSS_URL = "http://cba.fro.at/seriesrss/197?dev=true";
$XML::Feed::MULTIPLE_ENCLOSURES=1;
my $PV_ID = '75';

binmode(STDIN, ":utf8");
binmode(STDOUT, ":utf8");
binmode(STDERR, ":utf8");

if($#ARGV >= 0 && $ARGV[0] eq 'last') {
  print "!!!This is the last attempt, there won't be a retry on error!!!\n"
}

my $user = `/usr/bin/id -un`;
$user =~ s/\n//;
my $group = "radioStimm";
my %week_table = ( 1 => 2, 2 => 5, 3 => 2, 4 => 5 );

my $dbh = DBI->connect("DBI:mysql:$DB:$DBHOST","$DBUSER","$DBPW") or die "Database Error: $DBI::errstr";
my @allowed_dbs = rhimport::get_dropboxes($dbh, $user, $group);

my $dropbox = "";
my $to_cart = 0;
foreach(@allowed_dbs) {
  if($_->{'NAME'} =~ /^autoimport/) {
    $dropbox = $_->{'PATH'};
    $to_cart = $_->{'TO_CART'};
  }
}
if(!$to_cart) {
  print "no dropbox found!\n";
  $dbh->disconnect();
  exit 1;
}

my $curweek = get("http://airplay/getweek.php");
if(!defined $curweek || $curweek !~ /\d/ ) {
  print "can't fetch current week info!\n";
  $dbh->disconnect();
  exit 1;
}
if($curweek < 1 || $curweek > 4) {
  print "current week($curweek) out of bounds!\n";
  $dbh->disconnect();
  exit 1;
}
my $nextweek = $curweek == 4 ? 1 : $curweek + 1;

my @today = Date::Calc::Today();
print "today: " . Date::Calc::Date_to_Text(@today) . "\n";

my $dow = Date::Calc::Day_of_Week(@today);
my @import_date = Date::Calc::Standard_to_Business(@today);

if($dow <= $week_table{$curweek}) {
  print "We are in week $curweek - broadcast is on " . Date::Calc::Day_of_Week_to_Text($week_table{$curweek}) . "\n";
  $import_date[2] = $week_table{$curweek};
  @import_date = Date::Calc::Business_to_Standard($import_date[0], $import_date[1], $import_date[2]);
} else {
  print "We are in week $curweek - broadcast was on " . Date::Calc::Day_of_Week_to_Text($week_table{$curweek}) . "\n";
  print "  next week is $nextweek - broadcast is on " . Date::Calc::Day_of_Week_to_Text($week_table{$nextweek}) . "\n";
  $import_date[2] = $week_table{$nextweek};
  @import_date = Date::Calc::Business_to_Standard(@import_date);
  @import_date = Date::Calc::Add_Delta_Days(@import_date, 7);
}
print "day of next Radio Helsinki broadcast: " . Date::Calc::Date_to_Text(@import_date) . "\n";

my @broadcast_date = Date::Calc::Nth_Weekday_of_Month_Year($import_date[0], $import_date[1], 2, 1);
if(Date::Calc::Delta_Days(@broadcast_date, @import_date) > 0) {
  my @tmp_date = Date::Calc::Nth_Weekday_of_Month_Year($import_date[0], $import_date[1], 2, 3);
  if(Date::Calc::Delta_Days(@tmp_date, @import_date)  > 0) {
    @broadcast_date = @tmp_date;
  }
} else {
  my @tmp_date = Date::Calc::Add_Delta_YM(@broadcast_date, 0, -1);
  @broadcast_date = Date::Calc::Nth_Weekday_of_Month_Year($tmp_date[0], $tmp_date[1], 2, 3);
}
print "day of latest original broadcast before next Radio Helsinki broadcast: " . Date::Calc::Date_to_Text(@broadcast_date) . "\n";

if(Date::Calc::Delta_Days(@broadcast_date, @today) <= 0) {
  print "File won't be available by now!\n";
  $dbh->disconnect();
  exit 0;
}

my $id = sprintf("%04d-%02d-%02d", $import_date[0], $import_date[1], $import_date[2]);
my $bd = sprintf("%04d-%02d-%02d", $broadcast_date[0], $broadcast_date[1], $broadcast_date[2]);
my $bdfile = sprintf("RAST%04d%02d%02dCBA(.*)\.MP3", $broadcast_date[0], $broadcast_date[1], $broadcast_date[2]);

print "looking for files from $bd in RSS Feed\n";
print " -> $RSS_URL\n";

my $feed = XML::Feed->parse(URI->new($RSS_URL))
  or die "Error fetching feed: " . XML::Feed->errstr;

my $file = "";
my $out_file = "";

my $i = 0;
for my $entry ($feed->entries) {
  $i++;
  next unless $entry->enclosure;
  my $j = 0;
  for my $enclosure($entry->enclosure) {
    $j++;
    if($enclosure->type eq "audio/mpeg" || $enclosure->type eq "audio/ogg") {
      print "$i/$j: (" . $enclosure->type . ", " . $enclosure->length . ") "  . $enclosure->url . "\n";
      my $url = $enclosure->url;
      if($url =~ /^(.*)_cut(\.[^\.]+)$/) {
        $url = $1 . $2;
      }

      my $ff = File::Fetch->new(uri => $url);
      next unless (uc($ff->output_file) =~ $bdfile); # file not from correct day

      my $sum_title = decode_entities($entry->title);
      my $sum_text = decode_entities($entry->content->body);

      my $current_stat = `cat $STAT_FILE`;
      my ($current_id, $current_file) = $current_stat =~ m/^(.*)\n(.*)/;
      if($current_id eq $id  &&  $current_file eq $ff->output_file) {
        print "Already downloaded file of today\n";
        $dbh->disconnect();
        exit 0;
      }
      $out_file = $ff->output_file;

      print " --> " . $bdfile . ": downloading " . $url . " (" . $enclosure->length . " Bytes) .. ";
      $file = $ff->fetch( to => '/tmp' ) or die $ff->error;
      print "ok\n";

      print "summary:\n" . $sum_title . "\n\n" . $sum_text . "\n";

      rhimport::pv_add_note($sum_title, $sum_text, $PV_ID, $id, "1");
      print "\n";

      last;
    }
    last if $file != "";
  }
}

if($file eq "" || !(-e "$file")) {
  print "No Entry found from $bd or download error - ";
  if($#ARGV >= 0 && $ARGV[0] eq 'last') {
    print "giving up, manual import necessary!!!\n";
  } else {
    print "will retry later\n";
  }
  exit 1;
}

print "will import $file to dropbox $dropbox (cart=$to_cart)\n";

my $error_cb = sub {
  my ($text) = @_;

  print "\n$text";
  return 0;
};

rhimport::check_key_file() or die "Import Key not found, use rhimport-create-id to create one\n";

my $ret;
my $log = rhimport::clear_carts($dbh, $group, $to_cart);
my $import_log;
($ret, $import_log) = rhimport::import_single($file, $dropbox, $user, 0, $error_cb);
$log .= $import_log;

$dbh->disconnect();

unlink $file;

if(!$ret) {
  print "\nImport Error:\n";
  print $log;
  exit 1;
}

unlink($STAT_FILE);
open(my $fhs, '>', $STAT_FILE);
print $fhs "$id\n$out_file";
close($fhs);

exit 0;