package Email::Sender::Simple 2.500;
# ABSTRACT: the simple interface for sending mail with Sender

use Moo;
with 'Email::Sender::Role::CommonSending';

#pod =head1 SEE INSTEAD
#pod
#pod For now, the best documentation of this class is in
#pod L<Email::Sender::Manual::QuickStart>.
#pod
#pod =cut

use Sub::Exporter::Util ();
use Sub::Exporter -setup => {
  exports => {
    sendmail        => Sub::Exporter::Util::curry_class('send'),
    try_to_sendmail => Sub::Exporter::Util::curry_class('try_to_send'),
  },
};

use Email::Address;
use Email::Sender::Transport;
use Email::Sender::Util;
use Try::Tiny;

{
  my $DEFAULT_TRANSPORT;
  my $DEFAULT_FROM_ENV;

  sub _default_was_from_env {
    my ($class) = @_;
    $class->default_transport;
    return $DEFAULT_FROM_ENV;
  }

  sub transport_from_env {
    my ($class, $env_base) = @_;
    $env_base ||= 'EMAIL_SENDER_TRANSPORT';

    my $transport_class = $ENV{$env_base};
    return unless defined $transport_class and length $transport_class;

    my %arg;
    for my $key (grep { /^\Q$env_base\E_[_0-9A-Za-z]+$/ } keys %ENV) {
      (my $new_key = $key) =~ s/^\Q$env_base\E_//;
      $arg{lc $new_key} = $ENV{$key};
    }

    return Email::Sender::Util->easy_transport($transport_class, \%arg);
  }

  sub default_transport {
    return $DEFAULT_TRANSPORT if $DEFAULT_TRANSPORT;
    my ($class) = @_;

    my $transport = $class->transport_from_env;

    if ($transport) {
      $DEFAULT_FROM_ENV  = 1;
      $DEFAULT_TRANSPORT = $transport;
    } else {
      $DEFAULT_FROM_ENV  = 0;
      $DEFAULT_TRANSPORT = $class->build_default_transport;
    }

    return $DEFAULT_TRANSPORT;
  }

  sub build_default_transport {
    require Email::Sender::Transport::Sendmail;
    my $transport = eval { Email::Sender::Transport::Sendmail->new };

    return $transport if $transport;

    require Email::Sender::Transport::SMTP;
    Email::Sender::Transport::SMTP->new;
  }

  sub reset_default_transport {
    undef $DEFAULT_TRANSPORT;
    undef $DEFAULT_FROM_ENV;
  }
}

# Maybe this should be an around, but I'm just not excited about figuring out
# order at the moment.  It just has to work. -- rjbs, 2009-06-05
around prepare_envelope => sub {
  my ($orig, $class, $arg) = @_;
  $arg ||= {};
  my $env = $class->$orig($arg);

  $env = {
    %$arg,
    %$env,
  };

  return $env;
};

sub send_email {
  my ($class, $email, $arg) = @_;

  my $transport = $class->default_transport;

  if ($arg->{transport}) {
    $arg = { %$arg }; # So we can delete transport without ill effects.
    $transport = delete $arg->{transport} unless $class->_default_was_from_env;
  }

  Carp::confess("transport $transport not safe for use with Email::Sender::Simple")
    unless $transport->is_simple;

  my ($to, $from) = $class->_get_to_from($email, $arg);

  Email::Sender::Failure::Permanent->throw("no recipients") if ! @$to;
  Email::Sender::Failure::Permanent->throw("no sender") if ! defined $from;

  return $transport->send(
    $email,
    {
      to   => $to,
      from => $from,
    },
  );
}

sub try_to_send {
  my ($class, $email, $arg) = @_;

  try {
    return $class->send($email, $arg);
  } catch {
    my $error = $_ || 'unknown error';
    return if try { $error->isa('Email::Sender::Failure') };
    die $error;
  };
}

sub _get_to_from {
  my ($class, $email, $arg) = @_;

  my $to = $arg->{to};
  unless (@$to) {
    my @to_addrs =
      map  { $_->address               }
      grep { defined                   }
      map  { Email::Address->parse($_) }
      map  { $email->get_header($_)    }
      qw(to cc);
    $to = \@to_addrs;
  }

  my $from = $arg->{from};
  unless (defined $from) {
    ($from) =
      map  { $_->address               }
      grep { defined                   }
      map  { Email::Address->parse($_) }
      map  { $email->get_header($_)    }
      qw(from);
  }

  return ($to, $from);
}

no Moo;
"220 OK";

__END__

=pod

=encoding UTF-8

=head1 NAME

Email::Sender::Simple - the simple interface for sending mail with Sender

=head1 VERSION

version 2.500

=head1 PERL VERSION

This library should run on perls released even a long time ago.  It should work
on any version of perl released in the last five years.

Although it may work on older versions of perl, no guarantee is made that the
minimum required version will not be increased.  The version may be increased
for any reason, and there is no promise that patches will be accepted to lower
the minimum required perl.

=head1 SEE INSTEAD

For now, the best documentation of this class is in
L<Email::Sender::Manual::QuickStart>.

=head1 AUTHOR

Ricardo Signes <rjbs@semiotic.systems>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2021 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut