package DBIx::Custom::Model;

use strict;

use warnings;

use base 'Object::Simple';

use Carp 'croak';

# Carp trust relationship

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

__PACKAGE__->attr(

    ['dbi', 'table'],

    columns => sub { [] },

    primary_key => sub { [] },

    relation => 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 ($self->dbi->can($mname)) {

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

    }

    elsif ($self->dbi->dbh->can($mname)) {

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

    }

    else {

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

    }

}

sub column_clause {

    my $self = shift;

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

    my $table   = $self->table;

    my $columns = $self->columns;

    my $add     = $args->{add} || [];

    my $remove  = $args->{remove} || [];

    my %remove  = map {$_ => 1} @$remove;

    my @column;

    foreach my $column (@$columns) {

        push @column, "$table.$column as $column"

          unless $remove{$column};

    }

    foreach my $column (@$add) {

        push @column, $column;

    }

    return join (', ', @column);

}

sub delete {

    my $self = shift;

    $self->dbi->delete(table => $self->table, @_);

}

sub delete_all {

    my $self = shift;

    $self->dbi->delete_all(table => $self->table, @_);

}

sub delete_at {

    my $self = shift;

    return $self->dbi->delete_at(

        table => $self->table,

        primary_key => $self->primary_key,

        @_

    );

}

sub DESTROY { }

sub insert {

    my $self = shift;

    $self->dbi->insert(table => $self->table, @_);

}

sub method {

    my $self = shift;

    # Merge

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

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

    return $self;

}

sub select {

    my $self = shift;

    $self->dbi->select(

        table => $self->table,

        relation => $self->relation,

        @_

    );

}

sub select_at {

    my $self = shift;

    return $self->dbi->select_at(

        table => $self->table,

        primary_key => $self->primary_key,

        relation => $self->relation,

        @_

    );

}

sub update {

    my $self = shift;

    $self->dbi->update(table => $self->table, @_)

}

sub update_all {

    my $self = shift;

    $self->dbi->update_all(table => $self->table, @_);

}

sub update_at {

    my $self = shift;

    return $self->dbi->update_at(

        table => $self->table,

        primary_key => $self->primary_key,

        @_

    );

}

1;

=head1 NAME

DBIx::Custom::Model - Model (experimental)

=head1 SYNOPSIS

use DBIx::Custom::Table;

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

=head1 ATTRIBUTES

=head2 C<(experimental) columns>

    my $columns = $model->columns;

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

=head2 C<dbi>

    my $dbi = $model->dbi;

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

L<DBIx::Custom> object.

=head2 C<table>

    my $table = $model->table;

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

Table name.

=head2 C<primary_key>

    my $primary_key = $model->primary_key;

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

Foreign key. This is used by C<update_at()>, C<delete_at()>,

C<select_at()>.

=head1 METHODS

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

and you can use all methods of the object set to C<dbi>.

and implements the following new ones.

=head2 C<column_clause()>

To create column clause automatically, use C<column_clause()>.

Valude of C<table> and C<columns> is used.

    my $column_clause = $model->column_clause;

If C<table> is 'book'�AC<column> is ['id', 'name'],

the following clause is created.

    book.id as id, book.name as name

These column name is for removing column name ambiguities.

If you remove some columns, use C<remove> option.

    my $column_clause = $model->column_clause(remove => ['id']);

If you add some column, use C<add> option.

    my $column_clause = $model->column_clause(add => ['company.id as company__id']);

=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<method>

    $table->method(

        count => sub {

            my $self = shift;

            return $self->select(column => 'count(*)', @_)

                        ->fetch_first->[0];

        }

    );

Add method to a L<DBIx::Custom::Table> object.

=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<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.