#!/usr/bin/env perl

use strict;
use warnings;

    # Finding out own path in order to reference own components (including own modules):
use Cwd            ();
use File::Basename ();
BEGIN {
    $ENV{'EHIVE_ROOT_DIR'} ||= File::Basename::dirname( File::Basename::dirname( Cwd::realpath($0) ) );
    unshift @INC, $ENV{'EHIVE_ROOT_DIR'}.'/modules';
}


use Getopt::Long;
use Bio::EnsEMBL::Registry;
use Bio::EnsEMBL::Hive::DBSQL::DBAdaptor;
use Bio::EnsEMBL::Hive::DBSQL::AnalysisJobAdaptor;
use Bio::EnsEMBL::Hive::Utils ('script_usage');


sub main {
    my ($url, $reg_conf, $reg_type, $reg_alias, $nosqlvc, $before_datetime, $days_ago);

    GetOptions(
                # connect to the database:
            'url=s'                      => \$url,
            'reg_conf|regfile=s'         => \$reg_conf,
            'reg_type=s'                 => \$reg_type,
            'reg_alias|regname=s'        => \$reg_alias,
            'nosqlvc=i'                  => \$nosqlvc,      # using "=i" instead of "!" for consistency with scripts where it is a propagated option

                # specify the threshold datetime:
            'before_datetime=s'     => \$before_datetime,
            'days_ago=f'            => \$days_ago,
    );

    my $hive_dba;
    if($url or $reg_alias) {
        $hive_dba = Bio::EnsEMBL::Hive::DBSQL::DBAdaptor->new(
                -url                            => $url,
                -reg_conf                       => $reg_conf,
                -reg_type                       => $reg_type,
                -reg_alias                      => $reg_alias,
                -no_sql_schema_version_check    => $nosqlvc,
        );
    } else {
        warn "\nERROR: Connection parameters (url or reg_conf+reg_alias) need to be specified\n";
        script_usage(1);
    }

    my $threshold_datetime_expression;

    if($before_datetime) {
        $threshold_datetime_expression = "'$before_datetime'";
    } else {
        unless($before_datetime or $days_ago) {
            warn "Neither -before_datetime or -days_ago was defined, assuming '-days_ago 7'\n";
            $days_ago = 7;
        }
        $threshold_datetime_expression = "from_unixtime(unix_timestamp(now())-3600*24*$days_ago)";
    }

    my $sql = qq{
    DELETE j FROM job j
     WHERE j.status='DONE'
       AND j.completed < $threshold_datetime_expression
    };

    my $dbc = $hive_dba->dbc();
    $dbc->do( $sql );
}

main();

__DATA__

=pod

=head1 NAME

    hoover_pipeline.pl

=head1 SYNOPSIS

    hoover_pipeline.pl {-url <url> | -reg_conf <reg_conf> -reg_alias <reg_alias>} [ { -before_datetime <datetime> | -days_ago <days_ago> } ]

=head1 DESCRIPTION

    hoover_pipeline.pl is a script used to remove old 'DONE' jobs from a continuously running pipeline database

=head1 USAGE EXAMPLES

        # delete all jobs that have been 'DONE' for at least a week (default threshold) :

    hoover_pipeline.pl -url "mysql://ensadmin:${ENSADMIN_PSW}@localhost:3306/lg4_long_mult"


        # delete all jobs that have been 'DONE' for at least a given number of days

    hoover_pipeline.pl -url "mysql://ensadmin:${ENSADMIN_PSW}@localhost:3306/lg4_long_mult" -days_ago 3


        # delete all jobs 'DONE' before a specific datetime:

    hoover_pipeline.pl -url "mysql://ensadmin:${ENSADMIN_PSW}@localhost:3306/lg4_long_mult" -before_datetime "2013-02-14 15:42:50"

=head1 LICENSE

    Copyright [1999-2014] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute

    Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

         http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software distributed under the License
    is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and limitations under the License.

=head1 CONTACT

    Please subscribe to the Hive mailing list:  http://listserver.ebi.ac.uk/mailman/listinfo/ehive-users  to discuss Hive-related questions or to be notified of our updates

=cut