package Teng::Schema;
use strict;
use warnings;
use Teng::Row;
use Class::Accessor::Lite
    rw => [ qw(
        tables
        namespace
    ) ]
;

sub new {
    my ($class, %args) = @_;
    bless {
        tables    => {},
        namespace => '',
        %args,
    }, $class;
}

sub set_default_instance {
    my ($class, $instance) = @_;
    no strict 'refs';
    no warnings 'once';
    ${"$class\::DEFAULT_INSTANCE"} = $instance;
}

sub instance {
    my $class = shift;
    no strict 'refs';
    no warnings 'once';
    ${"$class\::DEFAULT_INSTANCE"};
}

sub add_table {
    my ($self, $table) = @_;
    $self->{tables}->{$table->name} = $table;
}

sub get_table {
    my ($self, $name) = @_;
    return unless $name;
    $self->{tables}->{$name};
}

sub get_row_class {
    my ($self, $table_name) = @_;

    my $table = $self->{tables}->{$table_name};
    return $table->{row_class} if $table;
    return 'Teng::Row';
}

sub camelize {
    my $s = shift;
    join('', map{ ucfirst $_ } split(/(?<=[A-Za-z])_(?=[A-Za-z])|\b/, $s));
}

sub prepare_from_dbh {
    my ($self, $dbh) = @_;

    $_->prepare_from_dbh($dbh) for values %{$self->{tables}};
}

1;

__END__

=head1 NAME

Teng::Schema - Schema API for Teng

=head1 METHODS

=over 4

=item $schema = Teng::Schema->new

create new Teng::Schema's object.

=item $schema = Teng::Schema->instance

Get Teng::Schema's default instance object, was set by C<< Teng::Schema->set_default_instance() >>.

=item Teng::Schema->set_default_instance($schema)

set default Schema instance.

=item $schema->add_table($table);

add Teng::Schema::Table's object.

=item my $table = $schema->get_table($table_name);

get Teng::Schema::Table's object.

=item my $row_class = $schema->get_row_class($table_name);

get your table row class or Teng::Row class.

=item $schema->camelize($string)

convert from under_score text to CamelCase one.

=back

=cut