#!/usr/bin/perl

use strict;
use warnings;
use File::Basename;
use Text::Trim qw(trim);
use Test::More;
use lib 't';
use pgsm;

# Get filename and create out file name and dirs where requried
PGSM::setup_files_dir(basename($0));

if ($PGSM::PG_MAJOR_VERSION <= 16)
{
	plan skip_all => "pg_stat_monitor test cases for versions 16 and below.";
}

# Create new PostgreSQL node and do initdb
my $node = PGSM->pgsm_init_pg();

$node->append_conf(
	'postgresql.conf', qq(
shared_preload_libraries = 'pg_stat_monitor'
pg_stat_monitor.pgsm_bucket_time = 1
pg_stat_monitor.pgsm_max_buckets = 3
pg_stat_monitor.pgsm_normalized_query = on
pg_stat_monitor.pgsm_track = 'all'
));

# Start server
$node->start;

# Create EXTENSION and change out file permissions
my ($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'CREATE EXTENSION pg_stat_monitor;',
	extra_params => ['-a']);
is($cmdret, 0, "Create PGSM EXTENSION");
PGSM::append_to_debug_file($stdout);

# Run 'SELECT pg_stat_monitor settings' and dump output to out file
($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	"SELECT name, setting, unit, context, vartype, source, min_val, max_val, enumvals, boot_val, reset_val, pending_restart FROM pg_settings WHERE name LIKE '%pg_stat_monitor%';",
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
is($cmdret, 0, "Print PGSM EXTENSION Settings");
PGSM::append_to_debug_file($stdout);

# Run required commands/queries and dump output to out file.
($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'SELECT pg_stat_monitor_reset();',
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
is($cmdret, 0, "Reset PGSM EXTENSION");
PGSM::append_to_debug_file($stdout);

($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'SELECT pg_sleep(1);',
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
is($cmdret, 0, "1 - Run pg_sleep(1)");
PGSM::append_to_debug_file($stdout);

($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'SELECT pg_sleep(1);',
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
is($cmdret, 0, "2 - Run pg_sleep(1)");
PGSM::append_to_debug_file($stdout);

($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'SELECT pg_sleep(1);',
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
is($cmdret, 0, "3 - Run pg_sleep(1)");
PGSM::append_to_debug_file($stdout);

# Check that we have more than one bucket
($cmdret, $stdout, $stderr) = $node->psql('postgres',
	"SELECT count(bucket) <> 0 AS pgsm FROM pg_stat_monitor WHERE query LIKE '%sleep%';"
);
trim($stdout);
is($stdout, 't', "Check: we have more that one bucket");

# Check that stats timestamps are different for each query/bucket
($cmdret, $stdout, $stderr) = $node->psql('postgres',
	"SELECT count(DISTINCT stats_since) = count(stats_since) AS pgsm FROM pg_stat_monitor WHERE query LIKE '%sleep%';"
);
trim($stdout);
is($stdout, 't', "Check: for every bucket stats_since should be unique");

# Check that minmax_stats_since always match stats_since
($cmdret, $stdout, $stderr) = $node->psql('postgres',
	"SELECT count(*) AS st FROM pg_stat_monitor WHERE query LIKE '%sleep%' AND stats_since <> minmax_stats_since;"
);
trim($stdout);
is($stdout, 0, "Check: minmax_stats_since always match stats_since");
PGSM::append_to_debug_file($stdout);

# Stop the server
$node->stop;

# Done testing for this testcase file.
done_testing();