use MooseX::Declare;

class TSQL::AST::SQLWhileStatement extends TSQL::AST::SQLStatement {

use TSQL::AST::Factory;
use TSQL::AST::SQLConditionalExpression;
use TSQL::AST::SQLStatement;
use TSQL::AST::SQLStatementBlock;
use TSQL::AST::SQLTryCatchBlock;
#use TSQL::AST::SQLStatementBlock;

use TSQL::Common::Regexp;


=head1 NAME

TSQL::AST::SQLWhileStatement - Represents a TSQL While Statement.

=head1 VERSION

Version 0.01 

=cut

our $VERSION = '0.02';

use feature "switch";

use Data::Dumper;

has 'condition' => (
      is  => 'rw',
      isa => 'TSQL::AST::SQLConditionalExpression',
  );


has 'body' => (
      is  => 'rw',
      isa => 'TSQL::AST::SQLStatement',
  );



override parse ( ScalarRef[Int] $index, ArrayRef[Str] $input) {

#    while ( $$index <= $#{$input} ) {
        my $qr_iftoken               //= TSQL::Common::Regexp->qr_iftoken();
        my $qr_elsetoken             //= TSQL::Common::Regexp->qr_elsetoken();
        my $qr_whiletoken            //= TSQL::Common::Regexp->qr_whiletoken();
    
        my $ln = $$input[$$index];
        my $t = TSQL::AST::Factory->makeToken($ln);

#warn Dumper 'WHILE', $ln, $$index;
#warn Dumper 'WHILE',  $t;

        given ($t) {
            when ( defined $_ && $_->isa('TSQL::AST::Token::Begin') ) {
                $$index++;
                my $block = TSQL::AST::SQLStatementBlock->new( statements => [] ) ;
                $block->parse($index,$input);
                $self->body($block);
            }
            when ( defined $_ && $_->isa('TSQL::AST::Token::BeginTry') ) {
                $$index++;
                my $block = TSQL::AST::SQLTryCatchBlock->new( tryBlock => [],catchBlock => [] ) ;
                $block->parse($index,$input);
                $self->body($block);
            }
            when ( defined $_ && $_->isa('TSQL::AST::Token::Begin') ) {
                $$index++;
                my $block = TSQL::AST::SQLStatementBlock->new( statements => [] ) ;
                $block->parse($index,$input);
                push @{$self->statements()}, $block;
            }
            when ( defined $_ && $_->isa('TSQL::AST::Token::BeginTry') ) {
                $$index++;
                my $block = TSQL::AST::SQLTryCatchBlock->new( tryBlock => [],catchBlock => [] ) ;
                $block->parse($index,$input);
                push @{$self->statements()}, $block;
            }
            when ( defined $_ && $_->isa('TSQL::AST::Token::If') ) {
                my $condition = $ln;
                $condition =~ s{$qr_iftoken}{}xmis; # s{\A \s* (?:\b if \b)}{}xmis ;$condition =~ s{\A \s* (?:\b if \b)}{}xmis ;
                my $fr = TSQL::AST::SQLFragment->new( tokenString => $condition ) ; 
                my $co = TSQL::AST::SQLConditionalExpression->new( expression => $fr ) ; 
                my $block = TSQL::AST::SQLIfStatement->new( condition => $co ) ;            
                $block->parse($index,$input);
                push @{$self->statements()}, $block;
            }
            when ( defined $_ && $_->isa('TSQL::AST::Token::While') ) {
                $$index++;
                my $condition = $ln;
                $condition =~ s{$qr_whiletoken}{}xmis; # s{\A \s* (?:\b if \b)}{}xmis ;$condition =~ s{\A \s* (?:\b while \b)}{}xmis ;
                my $fr = TSQL::AST::SQLFragment->new( tokenString => $condition ) ; 
                my $co = TSQL::AST::SQLConditionalExpression->new( expression => $fr ) ; 
                my $block = TSQL::AST::SQLWhileStatement->new( condition => $co ) ;            
                push @{$self->statements()}, $block;
            }                

            default { 
                my $statement = TSQL::AST::Factory->makeStatement($ln);
#warn Dumper $ln;                                  
#warn Dumper $statement;                  
                $self->body($statement);
                $$index++;
            } 
        }
#    }
#warn Dumper "WHILE end", $$index;    
    return $self ;}

}





1;


=head1 SYNOPSIS

Represents the parsed version/AST of a TSQL While Statement.

=head1 DESCRIPTION

See TSQL::AST.

=head1 DEPENDENCIES

See TSQL::AST.

=head1 AUTHOR

Ded MedVed, C<< <dedmedved at cpan.org> >>

=head1 BUGS

See TSQL::AST.

=head1 METHODS

=head2 C<new>

=over 4

=item * C<< TSQL::AST::SQLWhileStatement->new() >>

=back

It creates and returns a new TSQL::AST::SQLWhileStatement object. 

=head2 C<parse>

=over 4

=item * C<< $while->parse( integer index into array, array of sqlfragments ) >>

This is the method which parses the split up SQL code.
    
=back    


=head2 C<condition>

=over 4

=item * C<< $while->condition() >>

TSQL::AST::SQLConditionalExpression representing the condtion clause of the While statement.
    
=back    


=head2 C<body>

=over 4

=item * C<< $while->body() >>

TSQL::AST::SQLStatement representing the body of the While statement.
    
=back    

=head1 LIMITATIONS

No limitations are currently known, as far as the intended usage is concerned.  
You *are* bound to uncover a large number of problems.

Please report any problematic cases.


=head1 SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc TSQL::AST


You can also look for information at:

=over 4

=item * RT: CPAN's request tracker (report bugs here)

L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=TSQL::AST>

=item * AnnoCPAN: Annotated CPAN documentation

L<http://annocpan.org/dist/TSQL::AST>

=item * CPAN Ratings

L<http://cpanratings.perl.org/d/TSQL::AST>

=item * Search CPAN

L<http://search.cpan.org/dist/TSQL::AST/>

=back


=head1 ACKNOWLEDGEMENTS

=over 4

None yet.

=back


=head1 SEE ALSO


=head1 LICENSE AND COPYRIGHT

Copyright 2012 Ded MedVed.

This program is free software; you can redistribute it and/or modify it
under the terms of either: the GNU General Public License as published
by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.


=cut

1; # End of TSQL::AST::SQLWhileStatement