use strict;
use warnings;
use Cwd;
use Config;
use TestLib;
use Test::More tests => 51;

program_help_ok('pg_basebackup');
program_version_ok('pg_basebackup');
program_options_handling_ok('pg_basebackup');

my $tempdir = tempdir;
start_test_server $tempdir;

command_fails(['pg_basebackup'],
	'pg_basebackup needs target directory specified');
command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup" ],
	'pg_basebackup fails because of hba');

# Some Windows ANSI code pages may reject this filename, in which case we
# quietly proceed without this bit of test coverage.
if (open BADCHARS, ">>$tempdir/pgdata/FOO\xe0\xe0\xe0BAR")
{
	print BADCHARS "test backup of file with non-UTF8 name\n";
	close BADCHARS;
}

configure_hba_for_replication "$tempdir/pgdata";
system_or_bail 'pg_ctl', '-D', "$tempdir/pgdata", 'reload';

command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup" ],
	'pg_basebackup fails because of WAL configuration');

open CONF, ">>$tempdir/pgdata/postgresql.conf";
print CONF "max_replication_slots = 10\n";
print CONF "max_wal_senders = 10\n";
print CONF "wal_level = archive\n";
close CONF;
restart_test_server;

command_ok([ 'pg_basebackup', '-D', "$tempdir/backup" ],
	'pg_basebackup runs');
ok(-f "$tempdir/backup/PG_VERSION", 'backup was created');

is_deeply([sort(slurp_dir("$tempdir/backup/pg_xlog/"))],
		  [sort qw(. .. archive_status)],
		  'no WAL files copied');

command_ok(
	[   'pg_basebackup', '-D', "$tempdir/backup2", '--xlogdir',
		"$tempdir/xlog2" ],
	'separate xlog directory');
ok(-f "$tempdir/backup2/PG_VERSION", 'backup was created');
ok(-d "$tempdir/xlog2/",             'xlog directory was created');

command_ok([ 'pg_basebackup', '-D', "$tempdir/tarbackup", '-Ft' ],
	'tar format');
ok(-f "$tempdir/tarbackup/base.tar", 'backup tar was created');

command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup_foo", '-Fp', "-T=/foo" ],
	'-T with empty old directory fails');
command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup_foo", '-Fp', "-T/foo=" ],
	'-T with empty new directory fails');
command_fails(
	[   'pg_basebackup', '-D', "$tempdir/backup_foo", '-Fp',
		"-T/foo=/bar=/baz" ],
	'-T with multiple = fails');
command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup_foo", '-Fp', "-Tfoo=/bar" ],
	'-T with old directory not absolute fails');
command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup_foo", '-Fp', "-T/foo=bar" ],
	'-T with new directory not absolute fails');
command_fails(
	[ 'pg_basebackup', '-D', "$tempdir/backup_foo", '-Fp', "-Tfoo" ],
	'-T with invalid format fails');

# Tar format doesn't support filenames longer than 100 bytes.
my $superlongname = "superlongname_" . ("x" x 100);
my $superlongpath = "$tempdir/pgdata/$superlongname";

open FILE, ">$superlongpath" or die "unable to create file $superlongpath";
close FILE;
command_fails([ 'pg_basebackup', '-D', "$tempdir/tarbackup_l1", '-Ft' ],
	'pg_basebackup tar with long name fails');
unlink "$tempdir/pgdata/$superlongname";

# The following tests test symlinks. Windows doesn't have symlinks, so
# skip on Windows.
SKIP: {
    skip "symlinks not supported on Windows", 10 if ($windows_os);

	# Create a temporary directory in the system location and symlink it
	# to our physical temp location.  That way we can use shorter names
	# for the tablespace directories, which hopefully won't run afoul of
	# the 99 character length limit.
	my $shorter_tempdir = tempdir_short . "/tempdir";
	symlink "$tempdir", $shorter_tempdir;

	mkdir "$tempdir/tblspc1";
	psql 'postgres',
	"CREATE TABLESPACE tblspc1 LOCATION '$shorter_tempdir/tblspc1';";
	psql 'postgres', "CREATE TABLE test1 (a int) TABLESPACE tblspc1;";
	command_ok([ 'pg_basebackup', '-D', "$tempdir/tarbackup2", '-Ft' ],
			   'tar format with tablespaces');
	ok(-f "$tempdir/tarbackup2/base.tar", 'backup tar was created');
	my @tblspc_tars = glob "$tempdir/tarbackup2/[0-9]*.tar";
	is(scalar(@tblspc_tars), 1, 'one tablespace tar was created');

	command_fails(
		[ 'pg_basebackup', '-D', "$tempdir/backup1", '-Fp' ],
		'plain format with tablespaces fails without tablespace mapping');

	command_ok(
		[   'pg_basebackup', '-D', "$tempdir/backup1", '-Fp',
			"-T$shorter_tempdir/tblspc1=$tempdir/tbackup/tblspc1" ],
		'plain format with tablespaces succeeds with tablespace mapping');
	ok(-d "$tempdir/tbackup/tblspc1", 'tablespace was relocated');
	opendir(my $dh, "$tempdir/pgdata/pg_tblspc") or die;
	ok( (   grep {
		-l "$tempdir/backup1/pg_tblspc/$_"
			and readlink "$tempdir/backup1/pg_tblspc/$_" eq
			"$tempdir/tbackup/tblspc1"
			} readdir($dh)),
		"tablespace symlink was updated");
	closedir $dh;

	mkdir "$tempdir/tbl=spc2";
	psql 'postgres', "DROP TABLE test1;";
	psql 'postgres', "DROP TABLESPACE tblspc1;";
	psql 'postgres',
	"CREATE TABLESPACE tblspc2 LOCATION '$shorter_tempdir/tbl=spc2';";
	command_ok(
		[   'pg_basebackup', '-D', "$tempdir/backup3", '-Fp',
			"-T$shorter_tempdir/tbl\\=spc2=$tempdir/tbackup/tbl\\=spc2" ],
		'mapping tablespace with = sign in path');
	ok(-d "$tempdir/tbackup/tbl=spc2", 'tablespace with = sign was relocated');
	psql 'postgres', "DROP TABLESPACE tblspc2;";

	mkdir "$tempdir/$superlongname";
	psql 'postgres',
	"CREATE TABLESPACE tblspc3 LOCATION '$tempdir/$superlongname';";
	command_ok([ 'pg_basebackup', '-D', "$tempdir/tarbackup_l3", '-Ft' ],
			   'pg_basebackup tar with long symlink target');
	psql 'postgres', "DROP TABLESPACE tblspc3;";
}

command_ok([ 'pg_basebackup', '-D', "$tempdir/backupR", '-R' ],
	'pg_basebackup -R runs');
ok(-f "$tempdir/backupR/recovery.conf", 'recovery.conf was created');
my $recovery_conf = slurp_file "$tempdir/backupR/recovery.conf";
# using a character class for the final "'" here works around an apparent
# bug in several version of the Msys DTK perl
like($recovery_conf, qr/^standby_mode = 'on[']$/m, 'recovery.conf sets standby_mode');
like($recovery_conf, qr/^primary_conninfo = '.*port=$ENV{PGPORT}.*'$/m, 'recovery.conf sets primary_conninfo');

command_ok([ 'pg_basebackup', '-D', "$tempdir/backupxf", '-X', 'fetch' ],
	'pg_basebackup -X fetch runs');
ok(grep(/^[0-9A-F]{24}$/, slurp_dir("$tempdir/backupxf/pg_xlog")), 'WAL files copied');
command_ok([ 'pg_basebackup', '-D', "$tempdir/backupxs", '-X', 'stream' ],
	'pg_basebackup -X stream runs');
ok(grep(/^[0-9A-F]{24}$/, slurp_dir("$tempdir/backupxf/pg_xlog")), 'WAL files copied');

command_fails([ 'pg_basebackup', '-D', "$tempdir/fail", '-S', 'slot1' ],
	'pg_basebackup with replication slot fails without -X stream');
command_fails([ 'pg_basebackup', '-D', "$tempdir/backupxs_sl_fail", '-X', 'stream', '-S', 'slot1' ],
	'pg_basebackup fails with nonexistent replication slot');

psql 'postgres', q{SELECT * FROM pg_create_physical_replication_slot('slot1')};
my $lsn = psql 'postgres', q{SELECT restart_lsn FROM pg_replication_slots WHERE slot_name = 'slot1'};
is($lsn, '', 'restart LSN of new slot is null');
command_ok([ 'pg_basebackup', '-D', "$tempdir/backupxs_sl", '-X', 'stream', '-S', 'slot1' ],
	'pg_basebackup -X stream with replication slot runs');
$lsn = psql 'postgres', q{SELECT restart_lsn FROM pg_replication_slots WHERE slot_name = 'slot1'};
like($lsn, qr!^0/[0-9A-Z]{7,8}$!, 'restart LSN of slot has advanced');

command_ok([ 'pg_basebackup', '-D', "$tempdir/backupxs_sl_R", '-X', 'stream', '-S', 'slot1', '-R' ],
	'pg_basebackup with replication slot and -R runs');
like(slurp_file("$tempdir/backupxs_sl_R/recovery.conf"),
	 qr/^primary_slot_name = 'slot1'$/m,
	 'recovery.conf sets primary_slot_name');
