package Feed::MailDir;
use Moose::Role;
use 5.016;
use namespace::autoclean;
use Encode;
use Encode::IMAPUTF7;
use MooseX::Types::Path::Class 'Dir';
use Maildir::Lite;

with 'Feed::Mail';

requires 'extract_entries';

has maildir_base => (
    is => 'ro',
    isa => Dir,
    coerce => 1,
    required => 1,
);

has maildir_folder => (
    is => 'ro',
    isa => 'Maildir::Lite',
    lazy_build => 1,
);

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

    my $feed = $self->feed;

    my $folder = encode('IMAP-UTF-7',$self->maildir_folder_for($feed));

    $self->maildir_base->mkpath;

    return Maildir::Lite->new(
        dir => $self->maildir_base->subdir($folder)->stringify,
    );
}

sub process_entry {
    my ($self,$entry) = @_;

    my ($msg) = $self->entry_to_mime($entry);

    $self->store_into_maildir($msg);

    return;
}

sub _clean_folder_part {
    return map { s{\W+}{-}gr } @_;
}

sub maildir_folder_for {
    my ($self,$feed) = @_;

    my (@comps) = _clean_folder_part($self->mail_folders,$self->title);
    return join '.','',@comps;
}

sub store_into_maildir {
    my ($self,$msg) = @_;

    my ($fh,$stat) = $self->maildir_folder->creat_message();
    die "maildir create message failed ($stat)" if $stat;

    binmode($fh);
    $msg->print($fh)
        or die "print to maildir failed: $!";

    $self->maildir_folder->deliver_message($fh)
        and die "maildir write failed";
}

1;