package RTI::Config;
use strict;
use warnings;

use 5.010;

use YAML::XS qw/ LoadFile Dump Load /;
use File::Spec;

sub new {
    my ( $class, $args ) = @_;

    my $self = { file => '', };
    bless $self, $class;

    my $file = $args->{file} || $self->_find_config;
    $self->read_config($file);

    return $self;
}

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

    # XXX This needs to be better
    foreach my $file (qw/ rt_invoice.conf rt_invoice.cfg .rt_invoicerc /) {
        foreach my $dir ( '.', $ENV{HOME} . '/.rt_invoicing', $ENV{HOME} ) {
            my $path = join '/', $dir, $file;
            return $path if -e $path;
        }
    }
    return;
}

sub read_config {
    my ( $self, $file ) = @_;

    $file ||= $self->{file};
    die "$file: no such file\n" unless -e $file;

    my $c = LoadFile($file) or die "Unable to load $file\n";

    $c->{customers} ||= [];
    if ( $c->{default} ) {
        foreach my $cust ( @{ $c->{customers} } ) {
            foreach my $k ( keys %{ $c->{default} } ) {
                $cust->{$k} //= Load( Dump( $c->{default}->{$k} ) );
            }
        }
    }

    $self->{_config} = $c;
    $self->{file}    = $file;
}

sub get {
    my ( $self, $key ) = @_;
    my $value = Load( Dump( $self->{_config}->{$key} ) );

    my ( $volume, $directories, $file )
        = File::Spec->splitpath( File::Spec->rel2abs( $self->{file} ) );

    given ($key) {
        when ('state') {
            if (!$value) {
                $value = $self->{file};
                $value =~ s/(?:\.[^.]+)?$/\.state/;
            }
        }
        when ('invoice_dir') {
            $value //= File::Spec->catdir( $volume, $directories, 'invoices' );
        }
        when ('template_dir') {
            $value //= File::Spec->catdir( $volume, $directories );
        }
        when ('invoice_template') {
            $value //= 'invoice.tex.tt';
        }
        when ('logo') {
            $value //= File::Spec->catfile( $volume, $directories, 'Logo.pdf' );
        }
        when ('customers') {
            $value = $self->_customers($value);
        }
    }

    return $value;
}

sub _customers {
    my ( $self, $customers ) = @_;
    my $default_cust = $self->new_customer;

    foreach my $cust ( @{$customers} ) {
        foreach (keys %{ $default_cust }) {
            $cust->{$_} = $default_cust->{$_} unless exists $cust->{$_}
        }
    }

    return $customers;
}

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

    my $cust = $self->get('default');

    return {
        day       => 0,
        per       => 'week',
        frequency => 1,
        hours     => { default => 0 },
        rates     => {},
        %{$cust}
    };
}

1;