use strict;
use warnings;

use Test::More;
use Test::Exception;
use DBIx::Class::Optional::Dependencies ();
use Scope::Guard ();
use List::Util 'shuffle';
use Try::Tiny;
use lib qw(t/lib);
use DBICTest;

my $env2optdep = {
  DBICTEST_FIREBIRD => 'test_rdbms_firebird',
  DBICTEST_FIREBIRD_INTERBASE => 'test_rdbms_firebird_interbase',
  DBICTEST_FIREBIRD_ODBC => 'test_rdbms_firebird_odbc',
};

plan skip_all => join (' ',
  'Set $ENV{DBICTEST_FIREBIRD_DSN} and/or $ENV{DBICTEST_FIREBIRD_INTERBASE_DSN}',
  'and/or $ENV{DBICTEST_FIREBIRD_ODBC_DSN},',
  '_USER and _PASS to run these tests.',

  'WARNING: this test creates and drops the tables "artist", "bindtype_test" and',
  '"sequence_test"; the generators "gen_artist_artistid", "pkid1_seq", "pkid2_seq"',
  'and "nonpkid_seq" and the trigger "artist_bi".',
) unless grep { $ENV{"${_}_DSN"} } keys %$env2optdep;

# tests stolen from 749sybase_asa.t

# Example DSNs:
# dbi:Firebird:db=/var/lib/firebird/2.5/data/hlaghdb.fdb
# dbi:InterBase:db=/var/lib/firebird/2.5/data/hlaghdb.fdb

# Example ODBC DSN:
# dbi:ODBC:Driver=Firebird;Dbname=/var/lib/firebird/2.5/data/hlaghdb.fdb

my $schema;

for my $prefix (shuffle keys %$env2optdep) { SKIP: {

  my ($dsn, $user, $pass) = map { $ENV{"${prefix}_$_"} } qw/DSN USER PASS/;
  next unless $dsn;


  # FIXME - work around https://github.com/google/sanitizers/issues/934
  $prefix eq 'DBICTEST_FIREBIRD_ODBC'
    and
  $Config::Config{config_args} =~ m{fsanitize\=address}
    and
  skip( "ODBC Firebird driver doesn't yet work with ASAN: https://github.com/google/sanitizers/issues/934", 1 );


  skip ("Testing with ${prefix}_DSN needs " . DBIx::Class::Optional::Dependencies->req_missing_for( $env2optdep->{$prefix} ), 1)
    unless  DBIx::Class::Optional::Dependencies->req_ok_for($env2optdep->{$prefix});

  note "Testing with ${prefix}_DSN";

  $schema = DBICTest::Schema->connect($dsn, $user, $pass, {
    auto_savepoint  => 1,
    quote_names     => 1,
    ($dsn !~ /ODBC/ ? (on_connect_call => 'use_softcommit') : ()),
  });
  my $dbh = $schema->storage->dbh;

  my $sg = Scope::Guard->new(sub { cleanup($schema) });

  eval { $dbh->do(q[DROP TABLE "artist"]) };
  $dbh->do(<<EOF);
  CREATE TABLE "artist" (
    "artistid" INT PRIMARY KEY,
    "name" VARCHAR(255),
    "charfield" CHAR(10),
    "rank" INT DEFAULT 13
  )
EOF
  eval { $dbh->do(q[DROP GENERATOR "gen_artist_artistid"]) };
  $dbh->do('CREATE GENERATOR "gen_artist_artistid"');
  eval { $dbh->do('DROP TRIGGER "artist_bi"') };
  $dbh->do(<<EOF);
  CREATE TRIGGER "artist_bi" FOR "artist"
  ACTIVE BEFORE INSERT POSITION 0
  AS
  BEGIN
   IF (NEW."artistid" IS NULL) THEN
    NEW."artistid" = GEN_ID("gen_artist_artistid",1);
  END
EOF
  eval { $dbh->do('DROP TABLE "sequence_test"') };
  $dbh->do(<<EOF);
  CREATE TABLE "sequence_test" (
    "pkid1" INT NOT NULL,
    "pkid2" INT NOT NULL,
    "nonpkid" INT,
    "name" VARCHAR(255)
  )
EOF
  $dbh->do('ALTER TABLE "sequence_test" ADD CONSTRAINT "sequence_test_constraint" PRIMARY KEY ("pkid1", "pkid2")');
  eval { $dbh->do('DROP GENERATOR "pkid1_seq"') };
  eval { $dbh->do('DROP GENERATOR pkid2_seq') };
  eval { $dbh->do('DROP GENERATOR "nonpkid_seq"') };
  $dbh->do('CREATE GENERATOR "pkid1_seq"');
  $dbh->do('CREATE GENERATOR pkid2_seq');
  $dbh->do('SET GENERATOR pkid2_seq TO 9');
  $dbh->do('CREATE GENERATOR "nonpkid_seq"');
  $dbh->do('SET GENERATOR "nonpkid_seq" TO 19');

  my $ars = $schema->resultset('Artist');
  is ( $ars->count, 0, 'No rows at first' );

# test primary key handling
  my $new = $ars->create({ name => 'foo' });
  ok($new->artistid, "Auto-PK worked");

# test auto increment using generators WITHOUT triggers
  for (1..5) {
      my $st = $schema->resultset('SequenceTest')->create({ name => 'foo' });
      is($st->pkid1, $_, "Firebird Auto-PK without trigger: First primary key");
      is($st->pkid2, $_ + 9, "Firebird Auto-PK without trigger: Second primary key");
      is($st->nonpkid, $_ + 19, "Firebird Auto-PK without trigger: Non-primary key");
  }
  my $st = $schema->resultset('SequenceTest')->create({ name => 'foo', pkid1 => 55 });
  is($st->pkid1, 55, "Firebird Auto-PK without trigger: First primary key set manually");

# test transaction commit
  $schema->txn_do(sub {
    $ars->create({ name => 'in_transaction' });
  });
  ok (($ars->search({ name => 'in_transaction' })->first),
    'transaction committed');
  is $schema->storage->_dbh->{AutoCommit}, 1,
    '$dbh->{AutoCommit} is correct after transaction commit';

  $ars->search({ name => 'in_transaction' })->delete;

# test savepoints
  throws_ok {
    $schema->txn_do(sub {
      my ($schema, $ars) = @_;
      eval {
        $schema->txn_do(sub {
          $ars->create({ name => 'in_savepoint' });
          die "rolling back savepoint";
        });
      };
      ok ((not $ars->search({ name => 'in_savepoint' })->first),
        'savepoint rolled back');
      $ars->create({ name => 'in_outer_txn' });
      die "rolling back outer txn";
    }, $schema, $ars);
  } qr/rolling back outer txn/,
    'correct exception for rollback';

  is $schema->storage->_dbh->{AutoCommit}, 1,
    '$dbh->{AutoCommit} is correct after transaction rollback';

  ok ((not $ars->search({ name => 'in_outer_txn' })->first),
    'outer txn rolled back');

# test explicit key spec
  $new = $ars->create ({ name => 'bar', artistid => 66 });
  is($new->artistid, 66, 'Explicit PK worked');
  $new->discard_changes;
  is($new->artistid, 66, 'Explicit PK assigned');

# row update
  lives_ok {
    $new->update({ name => 'baz' })
  } 'update survived';
  $new->discard_changes;
  is $new->name, 'baz', 'row updated';

# test populate
  lives_ok (sub {
    my @pop;
    for (1..2) {
      push @pop, { name => "Artist_$_" };
    }
    $ars->populate (\@pop);
  });

# test populate with explicit key
  lives_ok (sub {
    my @pop;
    for (1..2) {
      push @pop, { name => "Artist_expkey_$_", artistid => 100 + $_ };
    }
    $ars->populate (\@pop);
  });

# count what we did so far
  is ($ars->count, 6, 'Simple count works');

# test ResultSet UPDATE
  lives_and {
    $ars->search({ name => 'foo' })->update({ rank => 4 });

    is eval { $ars->search({ name => 'foo' })->first->rank }, 4;
  } 'Can update a column';

  my ($updated) = $schema->resultset('Artist')->search({name => 'foo'});
  is eval { $updated->rank }, 4, 'and the update made it to the database';

# test LIMIT support
  my $lim = $ars->search( {},
    {
      rows => 3,
      offset => 4,
      order_by => 'artistid'
    }
  );
  is( $lim->count, 2, 'ROWS+OFFSET count ok' );
  is( $lim->all, 2, 'Number of ->all objects matches count' );

# test iterator
  $lim->reset;
  is( eval { $lim->next->artistid }, 101, "iterator->next ok" );
  is( eval { $lim->next->artistid }, 102, "iterator->next ok" );
  is( $lim->next, undef, "next past end of resultset ok" );

# test bug in paging
  my $paged = $ars->search({ name => { -like => 'Artist%' } }, {
    page => 1,
    rows => 2,
    order_by => 'artistid',
  });

  my $row;
  lives_ok {
    $row = $paged->next;
  } 'paged query survived';

  is try { $row->artistid }, 5, 'correct row from paged query';

  # DBD bug - if any unfinished statements are present during
  # DDL manipulation (test blobs below)- a segfault will occur
  $paged->reset;

# test nested cursors
  {
    my $rs1 = $ars->search({}, { order_by => { -asc  => 'artistid' }});

    my $rs2 = $ars->search({ artistid => $rs1->next->artistid }, {
      order_by => { -desc => 'artistid' }
    });

    is $rs2->next->artistid, 1, 'nested cursors';
  }

# test empty insert
  lives_and {
    my $row = $ars->create({});
    ok $row->artistid;
  } 'empty insert works';

# test inferring the generator from the trigger source and using it with
# auto_nextval
  {
    local $ars->result_source->column_info('artistid')->{auto_nextval} = 1;

    lives_and {
      my $row = $ars->create({ name => 'introspecting generator' });
      ok $row->artistid;
    } 'inferring generator from trigger source works';
  }

  # at this point there should be no active statements
  # (finish() was called everywhere, either explicitly via
  # reset() or on DESTROY)
  for (keys %{$schema->storage->dbh->{CachedKids}}) {
    fail("Unreachable cached statement still active: $_")
      if $schema->storage->dbh->{CachedKids}{$_}->FETCH('Active');
  }

# test blobs (stolen from 73oracle.t)
  eval { $dbh->do('DROP TABLE "bindtype_test"') };
  $dbh->do(q[
  CREATE TABLE "bindtype_test"
  (
    "id"     INT PRIMARY KEY,
    "bytea"  INT,
    "blob"   BLOB,
    "clob"   BLOB SUB_TYPE TEXT,
    "a_memo" INT
  )
  ]);

  my %binstr = ( 'small' => join('', map { chr($_) } ( 1 .. 127 )) );
  $binstr{'large'} = $binstr{'small'} x 1024;

  my $maxloblen = length $binstr{'large'};
  local $dbh->{'LongReadLen'} = $maxloblen;

  my $rs = $schema->resultset('BindType');
  my $id = 0;

  foreach my $type (qw( blob clob )) {
    foreach my $size (qw( small large )) {
      $id++;

# turn off horrendous binary DBIC_TRACE output
      local $schema->storage->{debug} = 0;

      lives_ok { $rs->create( { 'id' => $id, $type => $binstr{$size} } ) }
      "inserted $size $type without dying";

      my $got = $rs->find($id)->$type;

      my $hexdump = sub { join '', map sprintf('%02X', ord), split //, shift };

      ok($got eq $binstr{$size}, "verified inserted $size $type" )
        or do {
            diag "For " . (ref $schema->storage) . "\n";
            diag "Got blob:\n";
            diag $hexdump->(substr($got,0,50));
            diag "Expecting blob:\n";
            diag $hexdump->(substr($binstr{$size},0,50));
        };
    }
  }
}}

done_testing;

# clean up our mess

sub cleanup {
  my $schema = shift;

  my $dbh;
  eval {
    $schema->storage->disconnect; # to avoid object FOO is in use errors
    $dbh = $schema->storage->dbh;
  };
  return unless $dbh;

  eval { $dbh->do('DROP TRIGGER "artist_bi"') };
  diag $@ if $@;

  foreach my $generator (qw/
    "gen_artist_artistid"
    "pkid1_seq"
    pkid2_seq
    "nonpkid_seq"
  /) {
    eval { $dbh->do(qq{DROP GENERATOR $generator}) };
    diag $@ if $@;
  }

  foreach my $table (qw/artist sequence_test/) {
    eval { $dbh->do(qq[DROP TABLE "$table"]) };
    diag $@ if $@;
  }

  eval { $dbh->do(q{DROP TABLE "bindtype_test"}) };
  diag $@ if $@;
}