#!/usr/bin/perl

use strict;
use warnings;
use File::Basename;
use File::Compare;
use File::Copy;
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();
my $pgdata = $node->data_dir;

# UPDATE postgresql.conf to include/load pg_stat_monitor library
open my $conf, '>>', "$pgdata/postgresql.conf";
print $conf "shared_preload_libraries = 'pg_stat_monitor'\n";
print $conf "pg_stat_monitor.pgsm_bucket_time = 2147483647\n"; # Max value for this parameter 
print $conf "pg_stat_monitor.pgsm_max_buckets = 20000\n"; # Max value for this parameter
close $conf;

# Start server
my $rt_value = $node->start;
ok($rt_value == 1, "Start Server");

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

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

($cmdret, $stdout, $stderr) = $node->psql('postgres', "SELECT 1 AS num;", extra_params => ['-a', '-Pformat=aligned','-Ptuples_only=off']);
ok($cmdret == 0, "Print results of a test query");
PGSM::append_to_file($stdout);

($cmdret, $stdout, $stderr) = $node->psql('postgres', 'SELECT query, comments FROM pg_stat_monitor ORDER BY query COLLATE "C";', extra_params => ['-a', '-Pformat=aligned','-Ptuples_only=off']);
ok($cmdret == 0, "Check query stats");
PGSM::append_to_file($stdout);

# DROP EXTENSION
$stdout = $node->safe_psql('postgres', 'DROP EXTENSION pg_stat_monitor;', extra_params => ['-a']);
ok($cmdret == 0, "DROP PGSM EXTENSION");
PGSM::append_to_file($stdout);

# Stop the server
$node->stop;

# compare the expected and out file
my $compare = PGSM->compare_results();

# Test/check if expected and result/out file match. If Yes, test passes.
is($compare,0,"Compare Files: $PGSM::expected_filename_with_path and $PGSM::out_filename_with_path files.");

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