package FS::cdr;

use strict;
use vars qw( @ISA );
use Date::Parse;
use Date::Format;
use Time::Local;
use FS::UID qw( dbh );
use FS::Record qw( qsearch qsearchs );
use FS::cdr_type;
use FS::cdr_calltype;
use FS::cdr_carrier;
use FS::cdr_upstream_rate;

@ISA = qw(FS::Record);

=head1 NAME

FS::cdr - Object methods for cdr records

=head1 SYNOPSIS

  use FS::cdr;

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

  $error = $record->insert;

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

  $error = $record->delete;

  $error = $record->check;

=head1 DESCRIPTION

An FS::cdr object represents an Call Data Record, typically from a telephony
system or provider of some sort.  FS::cdr inherits from FS::Record.  The
following fields are currently supported:

=over 4

=item acctid - primary key

=item calldate - Call timestamp (SQL timestamp)

=item clid - Caller*ID with text

=item src - Caller*ID number / Source number

=item dst - Destination extension

=item dcontext - Destination context

=item channel - Channel used

=item dstchannel - Destination channel if appropriate

=item lastapp - Last application if appropriate

=item lastdata - Last application data

=item startdate - Start of call (UNIX-style integer timestamp)

=item answerdate - Answer time of call (UNIX-style integer timestamp)

=item enddate - End time of call (UNIX-style integer timestamp)

=item duration - Total time in system, in seconds

=item billsec - Total time call is up, in seconds

=item disposition - What happened to the call: ANSWERED, NO ANSWER, BUSY 

=item amaflags - What flags to use: BILL, IGNORE etc, specified on a per channel basis like accountcode. 

=cut

  #ignore the "omit" and "documentation" AMAs??
  #AMA = Automated Message Accounting. 
  #default: Sets the system default. 
  #omit: Do not record calls. 
  #billing: Mark the entry for billing 
  #documentation: Mark the entry for documentation.

=back

=item accountcode - CDR account number to use: account

=item uniqueid - Unique channel identifier (Unitel/RSLCOM Event ID)

=item userfield - CDR user-defined field

=item cdr_type - CDR type - see L<FS::cdr_type> (Usage = 1, S&E = 7, OC&C = 8)

=item charged_party - Service number to be billed

=item upstream_currency - Wholesale currency from upstream

=item upstream_price - Wholesale price from upstream

=item upstream_rateplanid - Upstream rate plan ID

=item rated_price - Rated (or re-rated) price

=item distance - km (need units field?)

=item islocal - Local - 1, Non Local = 0

=item calltypenum - Type of call - see L<FS::cdr_calltype>

=item description - Description (cdr_type 7&8 only) (used for cust_bill_pkg.itemdesc)

=item quantity - Number of items (cdr_type 7&8 only)

=item carrierid - Upstream Carrier ID (see L<FS::cdr_carrier>) 

=cut

#Telstra =1, Optus = 2, RSL COM = 3

=item upstream_rateid - Upstream Rate ID

=item svcnum - Link to customer service (see L<FS::cust_svc>)

=item freesidestatus - NULL, done (or something)

=back

=head1 METHODS

=over 4

=item new HASHREF

Creates a new CDR.  To add the CDR 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 { 'cdr'; }

=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 CDR.  If there is
an error, returns the error, otherwise returns false.  Called by the insert
and replace methods.

Note: Unlike most types of records, we don't want to "reject" a CDR and we want
to process them as quickly as possible, so we allow the database to check most
of the data.

=cut

sub check {
  my $self = shift;

# we don't want to "reject" a CDR like other sorts of input...
#  my $error = 
#    $self->ut_numbern('acctid')
##    || $self->ut_('calldate')
#    || $self->ut_text('clid')
#    || $self->ut_text('src')
#    || $self->ut_text('dst')
#    || $self->ut_text('dcontext')
#    || $self->ut_text('channel')
#    || $self->ut_text('dstchannel')
#    || $self->ut_text('lastapp')
#    || $self->ut_text('lastdata')
#    || $self->ut_numbern('startdate')
#    || $self->ut_numbern('answerdate')
#    || $self->ut_numbern('enddate')
#    || $self->ut_number('duration')
#    || $self->ut_number('billsec')
#    || $self->ut_text('disposition')
#    || $self->ut_number('amaflags')
#    || $self->ut_text('accountcode')
#    || $self->ut_text('uniqueid')
#    || $self->ut_text('userfield')
#    || $self->ut_numbern('cdrtypenum')
#    || $self->ut_textn('charged_party')
##    || $self->ut_n('upstream_currency')
##    || $self->ut_n('upstream_price')
#    || $self->ut_numbern('upstream_rateplanid')
##    || $self->ut_n('distance')
#    || $self->ut_numbern('islocal')
#    || $self->ut_numbern('calltypenum')
#    || $self->ut_textn('description')
#    || $self->ut_numbern('quantity')
#    || $self->ut_numbern('carrierid')
#    || $self->ut_numbern('upstream_rateid')
#    || $self->ut_numbern('svcnum')
#    || $self->ut_textn('freesidestatus')
#  ;
#  return $error if $error;

  $self->calldate( $self->startdate_sql )
    if !$self->calldate && $self->startdate;

  unless ( $self->charged_party ) {
    if ( $self->dst =~ /^(\+?1)?8[02-8]{2}/ ) {
      $self->charged_party($self->dst);
    } else {
      $self->charged_party($self->src);
    }
  }

  #check the foreign keys even?
  #do we want to outright *reject* the CDR?
  my $error =
       $self->ut_numbern('acctid')

    #Usage = 1, S&E = 7, OC&C = 8
    || $self->ut_foreign_keyn('cdrtypenum',  'cdr_type',     'cdrtypenum' )

    #the big list in appendix 2
    || $self->ut_foreign_keyn('calltypenum', 'cdr_calltype', 'calltypenum' )

    # Telstra =1, Optus = 2, RSL COM = 3
    || $self->ut_foreign_keyn('carrierid', 'cdr_carrier', 'carrierid' )
  ;
  return $error if $error;

  $self->SUPER::check;
}

=item set_status_and_rated_price STATUS [ RATED_PRICE ]

Sets the status to the provided string.  If there is an error, returns the
error, otherwise returns false.

=cut

sub set_status_and_rated_price {
  my($self, $status, $rated_price) = @_;
  $self->freesidestatus($status);
  $self->rated_price($rated_price);
  $self->replace();
}

=item calldate_unix 

Parses the calldate in SQL string format and returns a UNIX timestamp.

=cut

sub calldate_unix {
  str2time(shift->calldate);
}

=item startdate_sql

Parses the startdate in UNIX timestamp format and returns a string in SQL
format.

=cut

sub startdate_sql {
  my($sec,$min,$hour,$mday,$mon,$year) = localtime(shift->startdate);
  $mon++;
  $year += 1900;
  "$year-$mon-$mday $hour:$min:$sec";
}

=item cdr_carrier

Returns the FS::cdr_carrier object associated with this CDR, or false if no
carrierid is defined.

=cut

my %carrier_cache = ();

sub cdr_carrier {
  my $self = shift;
  return '' unless $self->carrierid;
  $carrier_cache{$self->carrierid} ||=
    qsearchs('cdr_carrier', { 'carrierid' => $self->carrierid } );
}

=item carriername 

Returns the carrier name (see L<FS::cdr_carrier>), or the empty string if
no FS::cdr_carrier object is assocated with this CDR.

=cut

sub carriername {
  my $self = shift;
  my $cdr_carrier = $self->cdr_carrier;
  $cdr_carrier ? $cdr_carrier->carriername : '';
}

=item cdr_calltype

Returns the FS::cdr_calltype object associated with this CDR, or false if no
calltypenum is defined.

=cut

my %calltype_cache = ();

sub cdr_calltype {
  my $self = shift;
  return '' unless $self->calltypenum;
  $calltype_cache{$self->calltypenum} ||=
    qsearchs('cdr_calltype', { 'calltypenum' => $self->calltypenum } );
}

=item calltypename 

Returns the call type name (see L<FS::cdr_calltype>), or the empty string if
no FS::cdr_calltype object is assocated with this CDR.

=cut

sub calltypename {
  my $self = shift;
  my $cdr_calltype = $self->cdr_calltype;
  $cdr_calltype ? $cdr_calltype->calltypename : '';
}

=item cdr_upstream_rate

Returns the upstream rate mapping (see L<FS::cdr_upstream_rate>), or the empty
string if no FS::cdr_upstream_rate object is associated with this CDR.

=cut

sub cdr_upstream_rate {
  my $self = shift;
  return '' unless $self->upstream_rateid;
  qsearchs('cdr_upstream_rate', { 'upstream_rateid' => $self->upstream_rateid })
    or '';
}

=item _convergent_format COLUMN [ COUNTRYCODE ]

Returns the number in COLUMN formatted as follows:

If the country code does not match COUNTRYCODE (default "61"), it is returned
unchanged.

If the country code does match COUNTRYCODE (default "61"), it is removed.  In
addiiton, "0" is prepended unless the number starts with 13, 18 or 19. (???)

=cut

sub _convergent_format {
  my( $self, $field ) = ( shift, shift );
  my $countrycode = scalar(@_) ? shift : '61'; #+61 = australia
  #my $number = $self->$field();
  my $number = $self->get($field);
  #if ( $number =~ s/^(\+|011)$countrycode// ) {
  if ( $number =~ s/^\+$countrycode// ) {
    $number = "0$number"
      unless $number =~ /^1[389]/; #???
  }
  $number;
}

=item downstream_csv [ OPTION => VALUE, ... ]

=cut

my %export_formats = (
  'convergent' => [
    'carriername', #CARRIER
    sub { shift->_convergent_format('src') }, #SERVICE_NUMBER
    sub { shift->_convergent_format('charged_party') }, #CHARGED_NUMBER
    sub { time2str('%Y-%m-%d', shift->calldate_unix ) }, #DATE
    sub { time2str('%T',       shift->calldate_unix ) }, #TIME
    'billsec', #'duration', #DURATION
    sub { shift->_convergent_format('dst') }, #NUMBER_DIALED
    '', #XXX add (from prefixes in most recent email) #FROM_DESC
    '', #XXX add (from prefixes in most recent email) #TO_DESC
    'calltypename', #CLASS_CODE
    'rated_price', #PRICE
    sub { shift->rated_price ? 'Y' : 'N' }, #RATED
    '', #OTHER_INFO
  ],
);

sub downstream_csv {
  my( $self, %opt ) = @_;

  my $format = $opt{'format'}; # 'convergent';
  return "Unknown format $format" unless exists $export_formats{$format};

  eval "use Text::CSV_XS;";
  die $@ if $@;
  my $csv = new Text::CSV_XS;

  my @columns =
    map {
          ref($_) ? &{$_}($self) : $self->$_();
        }
    @{ $export_formats{$format} };

  my $status = $csv->combine(@columns);
  die "FS::CDR: error combining ". $csv->error_input(). "into downstream CSV"
    unless $status;

  $csv->string;

}

=back

=head1 CLASS METHODS

=over 4

=item batch_import

=cut

my($tmp_mday, $tmp_mon, $tmp_year);

my %import_formats = (
  'asterisk' => [
    'accountcode',
    'src',
    'dst',
    'dcontext',
    'clid',
    'channel',
    'dstchannel',
    'lastapp',
    'lastdata',
    'startdate', # XXX will need massaging
    'answer',    # XXX same
    'end',       # XXX same
    'duration',
    'billsec',
    'disposition',
    'amaflags',
    'uniqueid',
    'userfield',
  ],
  'unitel' => [
    'uniqueid',
    #'cdr_type',
    'cdrtypenum',
    'calldate', # may need massaging?  huh maybe not...
    #'billsec', #XXX duration and billsec?
                sub { $_[0]->billsec(  $_[1] );
                      $_[0]->duration( $_[1] );
                    },
    'src',
    'dst', # XXX needs to have "+61" prepended unless /^\+/ ???
    'charged_party',
    'upstream_currency',
    'upstream_price',
    'upstream_rateplanid',
    'distance',
    'islocal',
    'calltypenum',
    'startdate',  #XXX needs massaging
    'enddate',    #XXX same
    'description',
    'quantity',
    'carrierid',
    'upstream_rateid',
  ],
  'ams' => [

    # Date
    sub { my($cdr, $date) = @_;
          $date =~ /^(\d{1,2})\/(\d{1,2})\/(\d\d(\d\d)?)$/
            or die "unparsable date: $date"; #maybe we shouldn't die...
          #$cdr->startdate( timelocal(0, 0, 0 ,$2, $1-1, $3) );
          ($tmp_mday, $tmp_mon, $tmp_year) = ( $2, $1-1, $3 );
        },

    # Time
    sub { my($cdr, $time) = @_;
          #my($sec, $min, $hour, $mday, $mon, $year)= localtime($cdr->startdate);
          $time =~ /^(\d{1,2}):(\d{1,2}):(\d{1,2})$/
            or die "unparsable time: $time"; #maybe we shouldn't die...
          #$cdr->startdate( timelocal($3, $2, $1 ,$mday, $mon, $year) );
          $cdr->startdate(
            timelocal($3, $2, $1 ,$tmp_mday, $tmp_mon, $tmp_year)
          );
        },

    # Source_Number
    'src',

    # Terminating_Number
    'dst',

    # Duration
    sub { my($cdr, $min) = @_;
          my $sec = sprintf('%.0f', $min * 60 );
          $cdr->billsec(  $sec );
          $cdr->duration( $sec );
        },

  ],
);

sub batch_import {
  my $param = shift;

  my $fh = $param->{filehandle};
  my $format = $param->{format};

  return "Unknown format $format" unless exists $import_formats{$format};

  eval "use Text::CSV_XS;";
  die $@ if $@;

  my $csv = new Text::CSV_XS;

  my $imported = 0;
  #my $columns;

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  if ( $format eq 'ams' ) { # and other formats with a header too?

  }

  my $body = 0;
  my $line;
  while ( defined($line=<$fh>) ) {

    #skip header...
    if ( ! $body++ && $format eq 'ams' && $line =~ /^[\w\, ]+$/ ) {
      next;
    }

    $csv->parse($line) or do {
      $dbh->rollback if $oldAutoCommit;
      return "can't parse: ". $csv->error_input();
    };

    my @columns = $csv->fields();
    #warn join('-',@columns);

    if ( $format eq 'ams' ) {
      @columns = map { s/^ +//; $_; } @columns;
    }

    my @later = ();
    my %cdr =
      map {

        my $field_or_sub = $_;
        if ( ref($field_or_sub) ) {
          push @later, $field_or_sub, shift(@columns);
          ();
        } else {
          ( $field_or_sub => shift @columns );
        }

      }
      @{ $import_formats{$format} }
    ;

    my $cdr = new FS::cdr ( \%cdr );

    while ( scalar(@later) ) {
      my $sub = shift @later;
      my $data = shift @later;
      &{$sub}($cdr, $data);  # $cdr->&{$sub}($data); 
    }

    my $error = $cdr->insert;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return $error;

      #or just skip?
      #next;
    }

    $imported++;
  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;

  #might want to disable this if we skip records for any reason...
  return "Empty file!" unless $imported;

  '';

}

=back

=head1 BUGS

=head1 SEE ALSO

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

=cut

1;