package DBIx::Custom::Model;

use Object::Simple -base;

use Carp 'croak';

use DBIx::Custom::Util '_subname';

# Carp trust relationship

push @DBIx::Custom::CARP_NOT, __PACKAGE__;

has [qw/dbi table/],

    bind_type => sub { [] },

    columns => sub { [] },

    join => sub { [] },

    primary_key => sub { [] };

our $AUTOLOAD;

sub AUTOLOAD {

    my $self = shift;

    # Method name

    my ($package, $mname) = $AUTOLOAD =~ /^([\w\:]+)\:\:(\w+)$/;

    # Method

    $self->{_methods} ||= {};

    if (my $method = $self->{_methods}->{$mname}) {

        return $self->$method(@_)

    }

    elsif (my $dbi_method = $self->dbi->can($mname)) {

        $self->dbi->$dbi_method(@_);

    }

    elsif ($self->{dbh} && (my $dbh_method = $self->dbh->can($mname))) {

        $self->dbi->dbh->$dbh_method(@_);

    }

    else {

        croak qq{Can't locate object method "$mname" via "$package" }

            . _subname;

    }

}

my @methods = qw/insert insert_at update update_at update_all

                 delete delete_at delete_all select select_at count/;

foreach my $method (@methods) {

    my $code = sub {

        my $self = shift;

        my $args = [qw/table bind_type primary_key type/];

        push @$args, 'join' if $method =~ /^select/;

        $self->call_dbi($method, {args => $args}, @_);

    };

    no strict 'refs';

    my $class = __PACKAGE__;

    *{"${class}::$method"} = $code;

}

sub call_dbi {

    my $self = shift;

    my $method = shift;

    my $options = shift;

    my $arg_names = $options->{args};

    my @args;

    push @args, ($_ => $self->$_) for @$arg_names;

    unshift @args, shift if @_ % 2;

    return $self->dbi->$method(@args, @_);

}

sub DESTROY { }

sub method {

    my $self = shift;

    # Merge

    my $methods = ref $_[0] eq 'HASH' ? $_[0] : {@_};

    $self->{_methods} = {%{$self->{_methods} || {}}, %$methods};

    return $self;

}

sub mycolumn {

    my $self = shift;

    my $table = shift unless ref $_[0];

    my $columns = shift;

    $table ||= $self->table || '';

    $columns ||= $self->columns;

    return $self->dbi->mycolumn($table, $columns);

}

sub new {

    my $self = shift->SUPER::new(@_);

    # Check attribute names

    my @attrs = keys %$self;

    foreach my $attr (@attrs) {

        croak qq{"$attr" is invalid attribute name } . _subname

          unless $self->can($attr);

    }

    return $self;

}

# DEPRECATED!

has 'filter';

has 'name';

has type => sub { [] };

1;

=head1 NAME

DBIx::Custom::Model - Model

=head1 SYNOPSIS

use DBIx::Custom::Table;

my $table = DBIx::Custom::Model->new(table => 'books');

=head1 ATTRIBUTES

=head2 C<dbi>

    my $dbi = $model->dbi;

    $model = $model->dbi($dbi);

L<DBIx::Custom> object.

=head2 C<join>

    my $join = $model->join;

    $model = $model->join(

        ['left outer join company on book.company_id = company.id']

    );

Join clause, this value is passed to C<select> method.

=head2 C<primary_key>

    my $primary_key = $model->primary_key;

    $model = $model->primary_key(['id', 'number']);

Primary key,this is passed to C<insert>, C<update>,

C<delete>, and C<select> method.

=head2 C<table>

    my $table = $model->table;

    $model = $model->table('book');

Table name, this is passed to C<select> method.

=head2 C<bind_type>

    my $type = $model->bind_type;

    $model = $model->bind_type(['image' => DBI::SQL_BLOB]);

Database data type, this is used as type optioon of C<insert>, 

C<update>, C<update_all>, C<delete>, C<delete_all>,

C<select>, and C<execute> method

=head1 METHODS

L<DBIx::Custom::Model> inherits all methods from L<Object::Simple>,

and you can use all methods of L<DBIx::Custom> and L<DBI>

and implements the following new ones.

=head2 C<call_dbi> EXPERIMENTAL

    $model->call_dbi('insert',

      {args => ['table', 'primary_key' 'bind_type']}, @_)

Call L<DBIx::Custom>(or subclass) method. you can add

attribute values of model to arguments by C<args> option.

Generally this method is used when you want to added dbi method to model.

    sub insert {

        shift->call_dbi('insert',

          {args => ['table', 'primary_key' 'bind_type']}, @_);

    }

=head2 C<count> EXPERIMENTAL

    my $count = $model->count;

Get rows count.

Options is same as C<select> method's ones.

=head2 C<delete>

    $table->delete(...);

Same as C<delete> of L<DBIx::Custom> except that

you don't have to specify C<table> option.

=head2 C<delete_all>

    $table->delete_all(...);

Same as C<delete_all> of L<DBIx::Custom> except that

you don't have to specify C<table> option.

=head2 C<insert>

    $table->insert(...);

Same as C<insert> of L<DBIx::Custom> except that

you don't have to specify C<table> option.

=head2 C<method>

    $model->method(

        update_or_insert => sub {

            my $self = shift;

            # ...

        },

        find_or_create   => sub {

            my $self = shift;

            # ...

    );

Register method. These method is called directly from L<DBIx::Custom::Model> object.

    $model->update_or_insert;

    $model->find_or_create;

=head2 C<mycolumn>

    my $column = $self->mycolumn;

    my $column = $self->mycolumn(book => ['author', 'title']);

    my $column = $self->mycolumn(['author', 'title']);

Create column clause for myself. The follwoing column clause is created.

    book.author as author,

    book.title as title

If table name is ommited, C<table> attribute of the model is used.

If column names is omitted, C<columns> attribute of the model is used.

=head2 C<new>

    my $table = DBIx::Custom::Table->new;

Create a L<DBIx::Custom::Table> object.

=head2 C<select>

    $table->select(...);

Same as C<select> of L<DBIx::Custom> except that

you don't have to specify C<table> option.

=head2 C<update>

    $table->update(...);

Same as C<update> of L<DBIx::Custom> except that

you don't have to specify C<table> option.

=head2 C<update_all>

    $table->update_all(param => \%param);

Same as C<update_all> of L<DBIx::Custom> except that

you don't have to specify table name.

=cut