use strict;
use warnings;

use Test::More;

use DBIx::Class::_Util 'modver_gt_or_eq';
use base();
BEGIN {
  plan skip_all => 'base.pm 2.20 (only present in perl 5.19.7) is known to break this test'
    if modver_gt_or_eq(base => '2.19_01') and ! modver_gt_or_eq(base => '2.21');
}

use Test::Exception;
use lib qw(t/lib);
use DBICTest;
my $schema = DBICTest->init_schema();

# Under some versions of SQLite if the $rs is left hanging around it will lock
# So we create a scope here cos I'm lazy
{
    my $rs = $schema->resultset('CD')->search ({}, {
        order_by => 'cdid',
    });

    my $orig_resclass = $rs->result_class;
    eval "package DBICTest::CDSubclass; use base '$orig_resclass'";

# override on a specific $rs object, should not chain
    $rs->result_class ('DBICTest::CDSubclass');

    my $cd = $rs->find ({cdid => 1});
    is (ref $cd, 'DBICTest::CDSubclass', 'result_class override propagates to find');

    $cd = $rs->search({ cdid => 1 })->single;
    is (ref $cd, $orig_resclass, 'result_class override does not propagate over seach+single');

    $cd = $rs->search()->find ({ cdid => 1 });
    is (ref $cd, $orig_resclass, 'result_class override does not propagate over seach+find');

# set as attr - should propagate
    my $hri_rs = $rs->search ({}, { result_class => 'DBIx::Class::ResultClass::HashRefInflator' });
    is ($rs->result_class, 'DBICTest::CDSubclass', 'original class unchanged');
    is ($hri_rs->result_class, 'DBIx::Class::ResultClass::HashRefInflator', 'result_class accessor pre-set via attribute');

    my $datahashref1 = $hri_rs->next;
    is_deeply(
      [ sort keys %$datahashref1 ],
      [ sort $rs->result_source->columns ],
      'returned correct columns',
    );
    $hri_rs->reset;

    $cd = $hri_rs->find ({cdid => 1});
    is_deeply ( $cd, $datahashref1, 'first/find return the same thing (result_class attr propagates)');

    $cd = $hri_rs->search({ cdid => 1 })->single;
    is_deeply ( $cd, $datahashref1, 'first/search+single return the same thing (result_class attr propagates)');

    $hri_rs->result_class ('DBIx::Class::Row'); # something bogus
    is(
        $hri_rs->search->result_class, 'DBIx::Class::ResultClass::HashRefInflator',
        'result_class set using accessor does not propagate over unused search'
    );

# test result class auto-loading
    throws_ok (
      sub { $rs->result_class ('nonexsitant_bogus_class') },
      qr/Can't locate nonexsitant_bogus_class.pm/,
      'Attempt to load on accessor override',
    );
    is ($rs->result_class, 'DBICTest::CDSubclass', 'class unchanged');

    throws_ok (
      sub { $rs->search ({}, { result_class => 'nonexsitant_bogus_class' }) },
      qr/Can't locate nonexsitant_bogus_class.pm/,
      'Attempt to load on accessor override',
    );
    is ($rs->result_class, 'DBICTest::CDSubclass', 'class unchanged');
}

sub check_cols_of {
    my ($dbic_obj, $datahashref) = @_;

    foreach my $col (keys %$datahashref) {
        # plain column
        if (not ref ($datahashref->{$col}) ) {
            is ($datahashref->{$col}, $dbic_obj->get_column($col), 'same value');
        }
        # related table entry (belongs_to)
        elsif (ref ($datahashref->{$col}) eq 'HASH') {
            check_cols_of($dbic_obj->$col, $datahashref->{$col});
        }
        # multiple related entries (has_many)
        elsif (ref ($datahashref->{$col}) eq 'ARRAY') {
            my @dbic_reltable = $dbic_obj->$col;
            my @hashref_reltable = @{$datahashref->{$col}};

            is (scalar @hashref_reltable, scalar @dbic_reltable, 'number of related entries');

            # for my $index (0..scalar @hashref_reltable) {
            for my $index (0..scalar @dbic_reltable) {
                my $dbic_reltable_obj       = $dbic_reltable[$index];
                my $hashref_reltable_entry  = $hashref_reltable[$index];

                check_cols_of($dbic_reltable_obj, $hashref_reltable_entry);
            }
        }
    }
}

# create a cd without tracks for testing empty has_many relationship
$schema->resultset('CD')->create({ title => 'Silence is golden', artist => 3, year => 2006 });

# order_by to ensure both resultsets have the rows in the same order
# also check result_class-as-an-attribute syntax
my $rs_dbic = $schema->resultset('CD')->search(undef,
    {
        prefetch    => [ qw/ artist tracks / ],
        order_by    => [ 'me.cdid', 'tracks.position' ],
    }
);
my $rs_hashrefinf = $schema->resultset('CD')->search(undef,
    {
        prefetch    => [ qw/ artist tracks / ],
        order_by    => [ 'me.cdid', 'tracks.position' ],
        result_class => 'DBIx::Class::ResultClass::HashRefInflator',
    }
);

my @dbic        = $rs_dbic->all;
my @hashrefinf  = $rs_hashrefinf->all;

for my $index (0 .. $#hashrefinf) {
    my $dbic_obj    = $dbic[$index];
    my $datahashref = $hashrefinf[$index];

    check_cols_of($dbic_obj, $datahashref);
}

# sometimes for ultra-mega-speed you want to fetch columns in esoteric ways
# check the inflator over a non-fetching join
$rs_dbic = $schema->resultset ('Artist')->search ({ 'me.artistid' => 1}, {
    prefetch => { cds => 'tracks' },
    order_by => [qw/cds.cdid tracks.trackid/],
});

$rs_hashrefinf = $schema->resultset ('Artist')->search ({ 'me.artistid' => 1}, {
    join     => { cds => 'tracks' },
    select   => [qw/name   tracks.title      tracks.cd       /],
    as       => [qw/name   cds.tracks.title  cds.tracks.cd   /],
    order_by => [qw/cds.cdid tracks.trackid/],
    result_class => 'DBIx::Class::ResultClass::HashRefInflator',
});

@dbic = map { $_->tracks->all } ($rs_dbic->first->cds->all);
@hashrefinf  = $rs_hashrefinf->all;

is (scalar @dbic, scalar @hashrefinf, 'Equal number of tracks fetched');

for my $index (0 .. $#hashrefinf) {
    my $track       = $dbic[$index];
    my $datahashref = $hashrefinf[$index];

    is ($track->cd->artist->name, $datahashref->{name}, 'Brought back correct artist');
    for my $col (keys %{$datahashref->{cds}{tracks}}) {
        is ($track->get_column ($col), $datahashref->{cds}{tracks}{$col}, "Correct track '$col'");
    }
}

# check for same query as above but using extended columns syntax
$rs_hashrefinf = $schema->resultset ('Artist')->search ({ 'me.artistid' => 1}, {
    join     => { cds => 'tracks' },
    columns  => {name => 'name', 'cds.tracks.title' => 'tracks.title', 'cds.tracks.cd' => 'tracks.cd'},
    order_by => [qw/cds.cdid tracks.trackid/],
});
$rs_hashrefinf->result_class('DBIx::Class::ResultClass::HashRefInflator');
is_deeply [$rs_hashrefinf->all], \@hashrefinf, 'Check query using extended columns syntax';

# check nested prefetching of has_many relationships which return nothing
my $artist = $schema->resultset ('Artist')->create ({ name => 'unsuccessful artist without CDs'});
$artist->discard_changes;
my $rs_artists = $schema->resultset ('Artist')->search ({ 'me.artistid' => $artist->id}, {
    prefetch => { cds => 'tracks' }, result_class => 'DBIx::Class::ResultClass::HashRefInflator',
});
is_deeply(
  [$rs_artists->all],
  [{ $artist->get_columns, cds => [] }],
  'nested has_many prefetch without entries'
);

done_testing;

