package Data::Sah::Compiler::perl::TH::duration;

our $DATE = '2015-05-22'; # DATE
our $VERSION = '0.59'; # VERSION

use 5.010;
use strict;
use warnings;
#use Log::Any '$log';

use Mo qw(build default);
use Role::Tiny::With;
use Scalar::Util qw(blessed);

extends 'Data::Sah::Compiler::perl::TH';
with 'Data::Sah::Type::duration';

sub expr_coerce_term {
    my ($self, $cd, $t) = @_;

    my $c = $self->compiler;
    $c->add_module($cd, 'DateTime');
    $c->add_module($cd, 'Scalar::Util');

    join(
        '',
        "(",
        "(Scalar::Util::blessed($t) && $t->isa('DateTime::Duration')) ? $t : ",
        "$t =~ /\\AP(?:([0-9]+(?:\\.[0-9]+)?)Y)? (?:([0-9]+(?:\\.[0-9]+)?)M)? (?:([0-9]+(?:\\.[0-9]+)?)W)? (?:([0-9]+(?:\\.[0-9]+)?)D)? (?: T (?:([0-9]+(?:\\.[0-9]+)?)H)? (?:([0-9]+(?:\\.[0-9]+)?)M)? (?:([0-9]+(?:\\.[0-9]+)?)S)? )?\\z/x ? DateTime::Duration->new(years=>\$1||0, months=>\$2||0, weeks=>\$3||0, days=>\$4||0, hours=>\$5||0, minutes=>\$6||0, seconds=>\$7||0) : die(\"BUG: can't coerce duration\")",
        ")",
    );
}

sub expr_coerce_value {
    my ($self, $cd, $v) = @_;

    my $c = $self->compiler;
    $c->add_module($cd, 'DateTime::Duration');

    if (blessed($v) && $v->isa('DateTime::Duration')) {
        return join(
            '',
            "DateTime->new(",
            "years=>",   $v->years,   ",",
            "months=>",  $v->months,  ",",
            "weeks=>",   $v->weeks,   ",",
            "days=>",    $v->days,    ",",
            "hours=>",   $v->hours,   ",",
            "minutes=>", $v->minutes, ",",
            "seconds=>", $v->seconds, ",",
            ")",
        );
    } elsif ($v =~ /\AP
                    (?:([0-9]+(?:\.[0-9]+)?)Y)?
                    (?:([0-9]+(?:\.[0-9]+)?)M)?
                    (?:([0-9]+(?:\.[0-9]+)?)W)?
                    (?:([0-9]+(?:\.[0-9]+)?)D)?
                    (?: T
                        (?:([0-9]+(?:\.[0-9]+)?)H)?
                        (?:([0-9]+(?:\.[0-9]+)?)M)?
                        (?:([0-9]+(?:\.[0-9]+)?)S)?
                    )?\z/x) {
        require DateTime::Duration;
        #eval { DateTime::Duration->new(years=>$1||0, months =>$2||0, weeks  =>$3||0, days=>$4||0,
        #                               hours=>$5||0, minutes=>$6||0, seconds=>$7||0); 1 }
        #    or die "Invalid duration literal '$v': $@";
        return "DateTime::Duration->new(years=>".($1||0).", months=>".($2||0).", weeks=>".($3||0).", days=>".($4||0).", hours=>".($5||0).", minutes=>".($6||0).", seconds=>".($7||0).")";
    } else {
        die "Invalid duration literal '$v'";
    }
}

sub handle_type {
    my ($self, $cd) = @_;
    my $c  = $self->compiler;
    my $dt = $cd->{data_term};

    $c->add_module($cd, 'Scalar::Util');
    $cd->{_ccl_check_type} = join(
        '',
        "(",
        "(Scalar::Util::blessed($dt) && $dt->isa('DateTime::Duration'))",
        " || ",
        "($dt =~ /\\AP(?:([0-9]+(?:\\.[0-9]+)?)Y)? (?:([0-9]+(?:\\.[0-9]+)?)M)? (?:([0-9]+(?:\\.[0-9]+)?)W)? (?:([0-9]+(?:\\.[0-9]+)?)D)? (?: T (?:([0-9]+(?:\\.[0-9]+)?)H)? (?:([0-9]+(?:\\.[0-9]+)?)M)? (?:([0-9]+(?:\\.[0-9]+)?)S)? )?\\z/x)", # XXX need this? && eval { DateTime::Duration->new(...); 1 }
        ")",
    );
}

sub before_all_clauses {
    my ($self, $cd) = @_;
    my $c = $self->compiler;
    my $dt = $cd->{data_term};

    # XXX only do this when there are clauses

    # coerce to DateTime::Duration object during validation
    $self->set_tmp_data_term($cd, $self->expr_coerce_term($cd, $dt));
}

sub after_all_clauses {
    my ($self, $cd) = @_;
    my $c = $self->compiler;
    my $dt = $cd->{data_term};

    $self->restore_data_term($cd);
}

1;
# ABSTRACT: perl's type handler for type "duration"

__END__

=pod

=encoding UTF-8

=head1 NAME

Data::Sah::Compiler::perl::TH::duration - perl's type handler for type "duration"

=head1 VERSION

This document describes version 0.59 of Data::Sah::Compiler::perl::TH::duration (from Perl distribution Data-Sah), released on 2015-05-22.

=head1 DESCRIPTION

What constitutes a valid duration value:

=over

=item * L<DateTime::Duration> object

=item * string in the form of ISO8601 duration format: "PnYnMnWnDTnHnMnS"

For example: "P1Y2M" (equals to "P14M", 14 months), "P1DT13M" (1 day, 13
minutes).

=back

=for Pod::Coverage ^(clause_.+|superclause_.+|handle_.+|before_.+|after_.+|expr_coerce_.+)$

=head1 HOMEPAGE

Please visit the project's homepage at L<https://metacpan.org/release/Data-Sah>.

=head1 SOURCE

Source repository is at L<https://github.com/sharyanto/perl-Data-Sah>.

=head1 BUGS

Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Data-Sah>

When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2015 by perlancar@cpan.org.

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