use strict;
use warnings;

use Test::More;

use DBIO::Test ':DiffSQL';

my $schema = DBIO::Test->init_schema(no_deploy => 1);

# make sure order + distinct do not double-inject group criteria
my $rs = $schema->resultset ('CD')->search ({}, {
  distinct => 1,
  columns => 'title',
});

# title + cdid == unique constraint
my $unique_rs = $rs->search ({}, {
  '+columns' => 'cdid',
});

is_same_sql_bind (
  $rs->search({}, { order_by => 'title' })->as_query,
  '(
    SELECT "me"."title"
      FROM cd "me"
    GROUP BY "me"."title"
    ORDER BY "title"
  )',
  [],
  'Correct GROUP BY on selection+order_by on same column',
);

is_same_sql_bind (
  $rs->search({}, { order_by => 'year' })->as_query,
  '(
    SELECT "me"."title"
      FROM cd "me"
    GROUP BY "me"."title"
    ORDER BY MIN( "year" )
  )',
  [],
  'Correct GROUP BY on non-unique selection and order by a different column',
);

is_same_sql_bind (
  $unique_rs->search({}, { order_by => 'year' })->as_query,
  '(
    SELECT "me"."title", "me"."cdid"
      FROM cd "me"
    GROUP BY "me"."title", "me"."cdid", "me"."year"
    ORDER BY "year"
  )',
  [],
  'Correct GROUP BY on unique selection and order by a different column',
);

is_same_sql_bind (
  $rs->search({}, { order_by => 'artist.name', join => 'artist'  })->as_query,
  '(
    SELECT "me"."title"
      FROM cd "me"
      JOIN "artist" "artist"
        ON "artist"."artistid" = "me"."artist"
    GROUP BY "me"."title"
    ORDER BY MIN( "artist"."name" )
  )',
  [],
  'Correct GROUP BY on non-unique selection and external single order_by',
);

is_same_sql_bind (
  $unique_rs->search({}, { order_by => 'artist.name', join => 'artist'  })->as_query,
  '(
    SELECT "me"."title", "me"."cdid"
      FROM cd "me"
      JOIN "artist" "artist"
        ON "artist"."artistid" = "me"."artist"
    GROUP BY "me"."title", "me"."cdid", "artist"."name"
    ORDER BY "artist"."name"
  )',
  [],
  'Correct GROUP BY on unique selection and external single order_by',
);

is_same_sql_bind (
  $rs->search({}, { order_by => 'tracks.title', join => 'tracks'  })->as_query,
  '(
    SELECT "me"."title"
      FROM cd "me"
      LEFT JOIN "track" "tracks"
        ON "tracks"."cd" = "me"."cdid"
    GROUP BY "me"."title"
    ORDER BY MIN( "tracks"."title" )
  )',
  [],
  'Correct GROUP BY on non-unique selection and external multi order_by',
);

is_same_sql_bind (
  $unique_rs->search({}, { order_by => 'tracks.title', join => 'tracks'  })->as_query,
  '(
    SELECT "me"."title", "me"."cdid"
      FROM cd "me"
      LEFT JOIN "track" "tracks"
        ON "tracks"."cd" = "me"."cdid"
    GROUP BY "me"."title", "me"."cdid"
    ORDER BY MIN( "tracks"."title" )
  )',
  [],
  'Correct GROUP BY on unique selection and external multi order_by',
);

done_testing;
