package FS::cust_event;
use base qw( FS::cust_main_Mixin FS::Record );

use strict;
use vars qw( $DEBUG $me );
use Carp qw( croak confess );
use FS::Record qw( qsearch qsearchs dbdef );
#for cust_X
use FS::cust_main;
use FS::cust_pkg;
use FS::cust_bill;
use FS::cust_pay;
use FS::svc_acct;

$DEBUG = 0;
$me = '[FS::cust_event]';

=head1 NAME

FS::cust_event - Object methods for cust_event records

=head1 SYNOPSIS

  use FS::cust_event;

  $record = new FS::cust_event \%hash;
  $record = new FS::cust_event { 'column' => 'value' };

  $error = $record->insert;

  $error = $new_record->replace($old_record);

  $error = $record->delete;

  $error = $record->check;

=head1 DESCRIPTION

An FS::cust_event object represents an completed event.  FS::cust_event
inherits from FS::Record.  The following fields are currently supported:

=over 4

=item eventnum - primary key

=item eventpart - event definition (see L<FS::part_event>)

=item tablenum - customer, package or invoice, depending on the value of part_event.eventtable (see L<FS::cust_main>, L<FS::cust_pkg>, and L<FS::cust_bill>)

=item _date - specified as a UNIX timestamp; see L<perlfunc/"time">.  Also see
L<Time::Local> and L<Date::Parse> for conversion functions.

=item status - event status: B<new>, B<locked>, B<done> or B<failed>.  Note: B<done> indicates the event is complete and should not be retried (statustext may still be set to an optional message), while B<failed> indicates the event failed and should be retried.

=item statustext - additional status detail (i.e. error or progress message)

=item no_action - 'Y' if the event action wasn't performed. Some actions
contain an internal check to see if the action is going to be impossible (for
example, emailing a notice to a customer who has no email address), and if so,
won't attempt the action. It shouldn't be reported as a failure because
there's no need to retry it. However, the action should set no_action = 'Y'
so that there's a record.

=back

=head1 METHODS

=over 4

=item new HASHREF

Creates a new completed invoice event.  To add the compelted invoice event to
the database, see L<"insert">.

Note that this stores the hash reference, not a distinct copy of the hash it
points to.  You can ask the object for a copy with the I<hash> method.

=cut

# the new method can be inherited from FS::Record, if a table method is defined

sub table { 'cust_event'; }

sub cust_linked { $_[0]->cust_main_custnum || $_[0]->custnum } 
sub cust_unlinked_msg {
  my $self = shift;
  "WARNING: can't find cust_main.custnum ". $self->custnum;
  #' (cust_bill.invnum '. $self->invnum. ')';
}
sub custnum {
  my $self = shift;
  $self->cust_main_custnum(@_) || $self->SUPER::custnum(@_);
}

=item insert

Adds this record to the database.  If there is an error, returns the error,
otherwise returns false.

=cut

# the insert method can be inherited from FS::Record

=item delete

Delete this record from the database.

=cut

# the delete method can be inherited from FS::Record

=item replace OLD_RECORD

Replaces the OLD_RECORD with this one in the database.  If there is an error,
returns the error, otherwise returns false.

=cut

# the replace method can be inherited from FS::Record

=item check

Checks all fields to make sure this is a valid completed invoice event.  If
there is an error, returns the error, otherwise returns false.  Called by the
insert and replace methods.

=cut

# the check method should currently be supplied - FS::Record contains some
# data checking routines

sub check {
  my $self = shift;

  my $error = $self->ut_numbern('eventnum')
    || $self->ut_foreign_key('eventpart', 'part_event', 'eventpart')
  ;
  return $error if $error;

  my $eventtable = $self->part_event->eventtable;
  my $dbdef_eventtable = dbdef->table( $eventtable );

  $error = 
       $self->ut_foreign_key( 'tablenum',
                              $eventtable,
                              $dbdef_eventtable->primary_key
                            )
    || $self->ut_number('_date')
    || $self->ut_enum('status', [qw( new locked done failed initial)])
    || $self->ut_anything('statustext')
    || $self->ut_flag('no_action')
  ;
  return $error if $error;

  $self->SUPER::check;
}

=item part_event

Returns the event definition (see L<FS::part_event>) for this completed event.

=item cust_X

Returns the customer, package, invoice or batched payment (see
L<FS::cust_main>, L<FS::cust_pkg>, L<FS::cust_bill> or L<FS::cust_pay_batch>)
for this completed invoice event.

=cut

sub cust_bill {
  croak "FS::cust_event::cust_bill called";
}

sub cust_X {
  my $self = shift;
  my $eventtable = $self->part_event->eventtable;
  my $dbdef_table = dbdef->table( $eventtable );
  my $primary_key = $dbdef_table->primary_key;
  qsearchs( $eventtable, { $primary_key => $self->tablenum } );
}

=item test_conditions [ OPTION => VALUE ... ]

Tests conditions for this event, returns true if all conditions are satisfied,
false otherwise.

=cut

sub test_conditions {
  my( $self, %opt ) = @_;
  my $part_event = $self->part_event;
  my $object = $self->cust_X;
  my @conditions = $part_event->part_event_condition;
  $opt{'cust_event'} = $self;
  $opt{'time'} = $self->_date
      or die "test_conditions called without cust_event._date\n";
    # this MUST be set, or all hell breaks loose in event conditions.
    # it MUST be in the same time as in the cust_event object, or
    # future time-dependent events will trigger incorrectly.

  #no unsatisfied conditions
  #! grep ! $_->condition( $object, %opt ), @conditions;
  my @unsatisfied = grep ! $_->condition( $object, %opt ), @conditions;

  if ( $opt{'stats_hashref'} ) {
    foreach my $unsat (@unsatisfied) {
      $opt{'stats_hashref'}->{$unsat->conditionname}++;
    }
  } 

  ! @unsatisfied;
}

=item do_event

Runs the event action.

=cut

sub do_event {
  my $self = shift;
  my %opt = @_; # currently only 'time'
  my $time = $opt{'time'} || time;

  my $part_event = $self->part_event;

  my $object = $self->cust_X;
  my $obj_pkey = $object->primary_key;
  my $for = "for ". $object->table. " ". $object->$obj_pkey();
  warn "running cust_event ". $self->eventnum.
       " (". $part_event->action. ") $for\n"
    if $DEBUG;

  my $error;
  {
    local $SIG{__DIE__}; # don't want Mason __DIE__ handler active
    $error = eval { $part_event->do_action($object, $self); };
  }

  my $status = '';
  my $statustext = '';
  if ( $@ ) {
    $status = 'failed';
    #$statustext = $@;
    $statustext = "Error running ". $part_event->action. " action: $@";
  } elsif ( $error ) {
    $status = 'done';
    if ( $error eq 'N/A' ) {
      # archaic way to indicate no-op completion of spool_csv (and maybe
      # other events)?
      $self->no_action('Y');
    } else {
      $statustext = $error;
    }
  } else {
    $status = 'done';
  }

  #replace or add myself
  $self->_date($time);
  $self->status($status);
  $self->statustext($statustext);

  $error = $self->eventnum ? $self->replace : $self->insert;
  if ( $error ) {
    #this is why we need that locked state...
    my $e = 'WARNING: Event run but database not updated - '.
            'error replacing or inserting cust_event '. $self->eventnum.
            " $for: $error\n";
    warn $e;
    return $e;
  }

  '';

}

=item retry

Changes the status of this event from B<done> to B<failed>, allowing it to be
retried.

=cut

sub retry {
  my $self = shift;
  return '' unless $self->status eq 'done';
  my $old = ref($self)->new( { $self->hash } );
  $self->status('failed');
  $self->replace($old);
}

#=item retryable
#
#Changes the statustext of this event to B<retriable>, rendering it 
#retriable (should retry be called).
#
#=cut

sub retriable {
  confess "cust_event->retriable called";
  my $self = shift;
  return '' unless $self->status eq 'done';
  my $old = ref($self)->new( { $self->hash } );
  $self->statustext('retriable');
  $self->replace($old);
}

=item join_sql

=cut

sub join_sql {
  #my $class = shift;

  "
       JOIN part_event USING ( eventpart )

  LEFT JOIN cust_bill ON ( eventtable = 'cust_bill' AND tablenum = cust_bill.invnum  )
  LEFT JOIN cust_pkg  ON ( eventtable = 'cust_pkg'  AND tablenum = cust_pkg.pkgnum  )
  LEFT JOIN cust_pay  ON ( eventtable = 'cust_pay'  AND tablenum = cust_pay.paynum  )
  LEFT JOIN cust_pay_batch ON ( eventtable = 'cust_pay_batch' AND tablenum = cust_pay_batch.paybatchnum )
  LEFT JOIN cust_statement ON ( eventtable = 'cust_statement' AND tablenum = cust_statement.statementnum )

  LEFT JOIN cust_svc  ON ( eventtable = 'svc_acct'  AND tablenum = cust_svc.svcnum  )
  LEFT JOIN cust_pkg AS cust_pkg_for_svc ON ( cust_svc.pkgnum = cust_pkg_for_svc.pkgnum )

  LEFT JOIN cust_main ON (
       ( eventtable = 'cust_main' AND tablenum = cust_main.custnum )
    OR ( eventtable = 'cust_bill' AND cust_bill.custnum = cust_main.custnum )
    OR ( eventtable = 'cust_pkg'  AND cust_pkg.custnum  = cust_main.custnum )
    OR ( eventtable = 'cust_pay'  AND cust_pay.custnum  = cust_main.custnum )
    OR ( eventtable = 'svc_acct'  AND cust_pkg_for_svc.custnum  = cust_main.custnum )
  )
  ";

}

=item search_sql_where HASHREF

Class method which returns an SQL WHERE fragment to search for parameters
specified in HASHREF.  Valid parameters are

=over 4

=item agentnum

=item custnum

=item invnum

=item pkgnum

=item svcnum

=item failed

=item beginning

=item ending

=back

=cut

#Note: validates all passed-in data; i.e. safe to use with unchecked CGI params.
#sub 

sub search_sql_where {
  my($class, $param) = @_;
  if ( $DEBUG ) {
    warn "$me search_sql_where called with params: \n".
         join("\n", map { "  $_: ". $param->{$_} } keys %$param ). "\n";
  }

  my @search = $class->cust_search_sql($param);

  #eventpart
  my @eventpart = ref($param->{'eventpart'})
                    ? @{ $param->{'eventpart'} }
                    : split(',', $param->{'eventpart'});
  @eventpart = grep /^(\d+)$/, @eventpart;
  if ( @eventpart ) {
    push @search, 'eventpart IN ('. join(',', @eventpart). ')';
  }

  if ( $param->{'beginning'} =~ /^(\d+)$/ ) {
    push @search, "cust_event._date >= $1";
  }
  if ( $param->{'ending'} =~ /^(\d+)$/ ) {
    push @search, "cust_event._date <= $1";
  }

  #if ( $param->{'failed'} ) {
  #  push @search, "statustext != ''",
  #                "statustext IS NOT NULL",
  #                "statustext != 'N/A'";
  #}
  # huh?

  my @event_status = ref($param->{'event_status'})
                    ? @{ $param->{'event_status'} }
                    : split(',', $param->{'event_status'});
  if ( @event_status ) {
    my @status;

    my ($done_Y, $done_N, $done_S);
    # done_Y: action was taken
    # done_N: action was not taken
    # done_S: status message returned
    foreach (@event_status) {
      if ($_ eq 'done_Y') {
        $done_Y = 1;
      } elsif ( $_ eq 'done_N' ) {
        $done_N = 1;
      } elsif ( $_ eq 'done_S' ) {
        $done_S = 1;
      } else {
        push @status, $_;
      }
    }
    if ( $done_Y or $done_N or $done_S ) {
      push @status, 'done';
    }
    if ( @status ) {
      push @search, "cust_event.status IN(" .
                    join(',', map "'$_'", @status) .
                    ')';
    }

    # done_S status should include only those where statustext is not null,
    # and done_Y should include only those where it is.
    if ( $done_Y and $done_N and $done_S ) {
      # then not necessary
    } else {
      my @done_status;
      if ( $done_Y ) {
        push @done_status, "(cust_event.no_action IS NULL AND cust_event.statustext IS NULL)";
      }
      if ( $done_N ) {
        push @done_status, "(cust_event.no_action = 'Y')";
      }
      if ( $done_S ) {
        push @done_status, "(cust_event.no_action IS NULL AND cust_event.statustext IS NOT NULL)";
      }
      push @search, join(' OR ', @done_status) if @done_status;
    }

  } # event_status

  # always hide initialization
  push @search, 'cust_event.status != \'initial\'';

  if ( $param->{'custnum'} =~ /^(\d+)$/ ) {
    push @search, "cust_main.custnum = '$1'";
  }

  if ( $param->{'invnum'} =~ /^(\d+)$/ ) {
    push @search, "part_event.eventtable = 'cust_bill'",
                  "tablenum = '$1'";
  }

  if ( $param->{'pkgnum'} =~ /^(\d+)$/ ) {
    push @search, "part_event.eventtable = 'cust_pkg'",
                  "tablenum = '$1'";
  }

  if ( $param->{'paynum'} =~ /^(\d+)$/ ) {
    push @search, "part_event.eventtable = 'cust_pay'",
                  "tablenum = '$1'";
  }

  if ( $param->{'svcnum'} =~ /^(\d+)$/ ) {
    push @search, "part_event.eventtable = 'svc_acct'",
                  "tablenum = '$1'";
  }

  my $where = 'WHERE '. join(' AND ', @search );

  join(' AND ', @search );

}

=back

=head1 SUBROUTINES

=over 4

=item reprint

=cut

sub process_reprint {
  process_re_X('print', @_);
}

=item reemail

=cut

sub process_reemail {
  process_re_X('email', @_);
}

=item refax

=cut

sub process_refax {
  process_re_X('fax', @_);
}

use Data::Dumper;
sub process_re_X {
  my( $method, $job, $param ) = @_;
  warn Dumper($param) if $DEBUG;

  re_X(
    $method,
    $param,
    $job,
  );

}

sub re_X {
  my($method, $param, $job) = @_;

  my $search_sql = FS::cust_event->search_sql_where($param);

  #maybe not...?  we do want the "re-" action to match the search more closely
  #            # yuck!  hardcoded *AND* sequential scans!
  #my $where = " WHERE action LIKE 'cust_bill_send%' ".
  #           ( $search_sql ? " AND $search_sql" : "" );

  my $where = ( $search_sql ? " WHERE $search_sql" : "" );

  my @cust_event = qsearch({
    'table'     => 'cust_event',
    'addl_from' => FS::cust_event->join_sql(),
    'hashref'   => {},
    'extra_sql' => $where,
  });

  warn "$me re_X found ". scalar(@cust_event). " events\n"
    if $DEBUG;

  my( $num, $last, $min_sec ) = (0, time, 5); #progresbar foo
  foreach my $cust_event ( @cust_event ) {

    my $cust_X = $cust_event->cust_X; # cust_bill
    next unless $cust_X->can($method);

    my $part_event = $cust_event->part_event;
    my $template = $part_event->templatename
                   || $cust_X->agent_template;
    my $modenum = $part_event->option('modenum') || '';
    my $invoice_from = $part_event->option('agent_invoice_from') || '';
    $cust_X->set('mode' => $modenum);
    $cust_X->$method( { template => $template,
                        modenum  => $modenum,
                        from     => $invoice_from,
                    } );

    if ( $job ) { #progressbar foo
      $num++;
      if ( time - $min_sec > $last ) {
        my $error = $job->update_statustext(
          int( 100 * $num / scalar(@cust_event) )
        );
        die $error if $error;
        $last = time;
      }
    }

  }

  #this doesn't work, but it would be nice
  #if ( $job ) { #progressbar foo
  #  my $error = $job->update_statustext(
  #    scalar(@cust_event). " invoices re-${method}ed"
  #  );
  #  die $error if $error;
  #}

}

=back

=head1 SEE ALSO

L<FS::part_event>, L<FS::cust_bill>, L<FS::Record>, schema.html from the
base documentation.

=cut

1;