package Pear::LocalLoop::Import::LCCCsv::Transactions;
use Moo;
use DateTime;
use DateTime::Format::Strptime;

extends qw/Pear::LocalLoop::Import::LCCCsv/;

has target_entity_id => (
  is       => 'ro',
  required => 1,
);

has target_entity => (
  is      => 'lazy',
  builder => sub {
    my $self = shift;
    my $entity = $self->schema->resultset('Entity')->find($self->target_entity_id);
    Pear::LocalLoop::Error->throw("Cannot find LCC Entity, did you pass the right id?") unless $entity;
    return $entity;
  },
);

has '+csv_required_columns' => (
  builder => sub {return [ (
    'transaction_id',
    'supplier_id',
    'net_amount',
    'vat amount',
    'gross_amount',
  ) ]},
);

sub import_csv {
  my ($self) = @_;

  my $rows = $self->csv_data;
  my $lcc_org = $self->target_entity;

  foreach my $row (@{$rows}) {
    $self->_row_to_result($row, $lcc_org);
  }
}

sub _row_to_result {
  my ($self, $row, $lcc_org) = @_;

  my $supplier_id = $row->{supplier_id};

  my $organisation = $self->schema->resultset('Organisation')->find({
    'external_reference.external_id' => $supplier_id
  }, { join => 'external_reference' });

  unless ($organisation) {
    Pear::LocalLoop::Error->throw("Cannot find an organisation with supplier_id $supplier_id");
  }

  my $date_formatter = DateTime::Format::Strptime->new(
    pattern   => '%m/%d/%Y',
    time_zone => 'Europe/London'
  );

    my $paid_date = ( $row->{paid_date} ?
      $date_formatter->parse_datetime($row->{paid_date}) :
      $date_formatter->parse_datetime($row->{invoice_date}) );

  my $gross_value = $row->{gross_amount};
  $gross_value =~ s/,//g;
  my $sales_tax_value = $row->{"vat amount"};
  $sales_tax_value =~ s/,//g;
  my $net_value = $row->{net_amount};
  $net_value =~ s/,//g;

  # TODO negative values are sometimes present
  $self->external_result->find_or_create_related('transactions', {
    external_id => $row->{transaction_id},
    transaction => {
      seller        => $organisation->entity,
      buyer         => $lcc_org,
      purchase_time => $paid_date,
      value         => $gross_value * 100000,
      meta          => {
        gross_value     => $gross_value * 100000,
        sales_tax_value => $sales_tax_value * 100000,
        net_value       => $net_value * 100000,
      },
    }
  });
}

1;