#!/usr/bin/perl

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

# Get file name and CREATE out file name and dirs WHERE requried
PGSM::setup_files_dir(basename($0));

# 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'
# Set bucket duration to 1800 seconds so bucket doesn't change.
pg_stat_monitor.pgsm_bucket_time = 1800
track_io_timing = on
pg_stat_monitor.pgsm_track_utility = off
pg_stat_monitor.pgsm_normalized_query = on
));

# Start server
$node->start;

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

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

# Run 'SELECT ****' two times 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_file($stdout);

($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'CREATE TEMPORARY TABLE t1 (a int); INSERT INTO t1 SELECT generate_series(1, 10000); ANALYZE t1; SELECT * FROM t1;',
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
is($cmdret, 0,
	"CREATE Temporary Table and INSERT values in a single session.");
PGSM::append_to_file($stdout);

($cmdret, $stdout, $stderr) = $node->psql(
	'postgres',
	'SELECT substr(query, 0, 130) AS query, calls, rows_retrieved, cpu_user_time, cpu_sys_time, local_blks_hit, local_blks_read, local_blks_dirtied, local_blks_written, temp_blks_read, temp_blks_written FROM pg_stat_monitor WHERE query LIKE \'%t1%\' ORDER BY query, calls DESC;',
	extra_params => [ '-a', '-Pformat=aligned', '-Ptuples_only=off' ]);
PGSM::append_to_debug_file($stdout);

# Compare values for query 'INSERT INTO t1 SELECT generate_series($1, $2)'
($cmdret, $stdout, $stderr) = $node->psql('postgres',
	'SELECT pgsm.local_blks_hit <> 0 FROM pg_stat_monitor AS pgsm WHERE pgsm.query LIKE \'%INSERT INTO t1%\';'
);
trim($stdout);
is($stdout, 't', "Check: local_blks_hit should not be 0.");

($cmdret, $stdout, $stderr) = $node->psql('postgres',
	'SELECT pgsm.local_blks_dirtied <> 0 FROM pg_stat_monitor AS pgsm WHERE pgsm.query LIKE \'%INSERT INTO t1%\';'
);
trim($stdout);
is($stdout, 't', "Check: local_blks_dirtied should not be 0.");

if ($PGSM::PG_MAJOR_VERSION >= 17)
{
	($cmdret, $stdout, $stderr) = $node->psql('postgres',
		'SELECT sum(pgsm.local_blk_write_time) <> 0 FROM pg_stat_monitor AS pgsm WHERE pgsm.query LIKE \'%INSERT INTO t1%\''
	);
	trim($stdout);
	is($stdout, 't', "Check: local_blk_write_time should not be 0.");
}


# Compare values for query 'SELECT * FROM t1'
($cmdret, $stdout, $stderr) = $node->psql('postgres',
	'SELECT pgsm.local_blks_hit <> 0 FROM pg_stat_monitor AS pgsm WHERE pgsm.query LIKE \'%FROM t1%\';'
);
trim($stdout);
is($stdout, 't', "Check: local_blks_hit should not be 0.");

# TODO: Find a way how to bypass cache and get real block reads
# if ($PGSM::PG_MAJOR_VERSION >= 17)
# {
#     ($cmdret, $stdout, $stderr) = $node->psql('postgres', 'SELECT sum(pgsm.local_blk_read_time) <> 0 FROM pg_stat_monitor AS pgsm WHERE pgsm.query LIKE \'%FROM t1%\';');
#     trim($stdout);
#     is($stdout,'t',"Check: local_blk_read_time should not be 0.");
# }

# Stop the server
$node->stop;

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