import pytest
from flexmock import flexmock

from borgmatic.hooks import postgresql as module


def test_make_database_dump_filename_uses_name_and_hostname():
    flexmock(module.os.path).should_receive('expanduser').and_return('databases')

    assert module.make_database_dump_filename('test', 'hostname') == 'databases/hostname/test'


def test_make_database_dump_filename_without_hostname_defaults_to_localhost():
    flexmock(module.os.path).should_receive('expanduser').and_return('databases')

    assert module.make_database_dump_filename('test') == 'databases/localhost/test'


def test_make_database_dump_filename_with_invalid_name_raises():
    flexmock(module.os.path).should_receive('expanduser').and_return('databases')

    with pytest.raises(ValueError):
        module.make_database_dump_filename('invalid/name')


def test_dump_databases_runs_pg_dump_for_each_database():
    databases = [{'name': 'foo'}, {'name': 'bar'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/foo'
    ).and_return('databases/localhost/bar')
    flexmock(module.os).should_receive('makedirs')

    for name in ('foo', 'bar'):
        flexmock(module).should_receive('execute_command').with_args(
            (
                'pg_dump',
                '--no-password',
                '--clean',
                '--file',
                'databases/localhost/{}'.format(name),
                '--format',
                'custom',
                name,
            ),
            extra_environment=None,
        ).once()

    module.dump_databases(databases, 'test.yaml', dry_run=False)


def test_dump_databases_with_dry_run_skips_pg_dump():
    databases = [{'name': 'foo'}, {'name': 'bar'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/foo'
    ).and_return('databases/localhost/bar')
    flexmock(module.os).should_receive('makedirs')
    flexmock(module).should_receive('execute_command').never()

    module.dump_databases(databases, 'test.yaml', dry_run=True)


def test_dump_databases_without_databases_does_not_raise():
    module.dump_databases([], 'test.yaml', dry_run=False)


def test_dump_databases_with_invalid_database_name_raises():
    databases = [{'name': 'heehee/../../etc/passwd'}]

    with pytest.raises(ValueError):
        module.dump_databases(databases, 'test.yaml', dry_run=True)


def test_dump_databases_runs_pg_dump_with_hostname_and_port():
    databases = [{'name': 'foo', 'hostname': 'database.example.org', 'port': 5433}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/database.example.org/foo'
    )
    flexmock(module.os).should_receive('makedirs')

    flexmock(module).should_receive('execute_command').with_args(
        (
            'pg_dump',
            '--no-password',
            '--clean',
            '--file',
            'databases/database.example.org/foo',
            '--host',
            'database.example.org',
            '--port',
            '5433',
            '--format',
            'custom',
            'foo',
        ),
        extra_environment=None,
    ).once()

    module.dump_databases(databases, 'test.yaml', dry_run=False)


def test_dump_databases_runs_pg_dump_with_username_and_password():
    databases = [{'name': 'foo', 'username': 'postgres', 'password': 'trustsome1'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/foo'
    )
    flexmock(module.os).should_receive('makedirs')

    flexmock(module).should_receive('execute_command').with_args(
        (
            'pg_dump',
            '--no-password',
            '--clean',
            '--file',
            'databases/localhost/foo',
            '--username',
            'postgres',
            '--format',
            'custom',
            'foo',
        ),
        extra_environment={'PGPASSWORD': 'trustsome1'},
    ).once()

    module.dump_databases(databases, 'test.yaml', dry_run=False)


def test_dump_databases_runs_pg_dump_with_format():
    databases = [{'name': 'foo', 'format': 'tar'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/foo'
    )
    flexmock(module.os).should_receive('makedirs')

    flexmock(module).should_receive('execute_command').with_args(
        (
            'pg_dump',
            '--no-password',
            '--clean',
            '--file',
            'databases/localhost/foo',
            '--format',
            'tar',
            'foo',
        ),
        extra_environment=None,
    ).once()

    module.dump_databases(databases, 'test.yaml', dry_run=False)


def test_dump_databases_runs_pg_dump_with_options():
    databases = [{'name': 'foo', 'options': '--stuff=such'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/foo'
    )
    flexmock(module.os).should_receive('makedirs')

    flexmock(module).should_receive('execute_command').with_args(
        (
            'pg_dump',
            '--no-password',
            '--clean',
            '--file',
            'databases/localhost/foo',
            '--format',
            'custom',
            '--stuff=such',
            'foo',
        ),
        extra_environment=None,
    ).once()

    module.dump_databases(databases, 'test.yaml', dry_run=False)


def test_dump_databases_runs_pg_dumpall_for_all_databases():
    databases = [{'name': 'all'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/all'
    )
    flexmock(module.os).should_receive('makedirs')

    flexmock(module).should_receive('execute_command').with_args(
        ('pg_dumpall', '--no-password', '--clean', '--file', 'databases/localhost/all'),
        extra_environment=None,
    ).once()

    module.dump_databases(databases, 'test.yaml', dry_run=False)


def test_remove_database_dumps_removes_dump_for_each_database():
    databases = [{'name': 'foo'}, {'name': 'bar'}]
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/localhost/foo'
    ).and_return('databases/localhost/bar')
    flexmock(module.os).should_receive('listdir').and_return([])
    flexmock(module.os).should_receive('rmdir')

    for name in ('foo', 'bar'):
        flexmock(module.os).should_receive('remove').with_args(
            'databases/localhost/{}'.format(name)
        ).once()

    module.remove_database_dumps(databases, 'test.yaml', dry_run=False)


def test_remove_database_dumps_with_dry_run_skips_removal():
    databases = [{'name': 'foo'}, {'name': 'bar'}]
    flexmock(module.os).should_receive('remove').never()

    module.remove_database_dumps(databases, 'test.yaml', dry_run=True)


def test_remove_database_dumps_without_databases_does_not_raise():
    module.remove_database_dumps([], 'test.yaml', dry_run=False)


def test_remove_database_dumps_with_invalid_database_name_raises():
    databases = [{'name': 'heehee/../../etc/passwd'}]

    with pytest.raises(ValueError):
        module.remove_database_dumps(databases, 'test.yaml', dry_run=True)


def test_make_database_dump_patterns_converts_names_to_glob_paths():
    flexmock(module).should_receive('make_database_dump_filename').and_return(
        'databases/*/foo'
    ).and_return('databases/*/bar')

    assert module.make_database_dump_patterns(('foo', 'bar')) == [
        'databases/*/foo',
        'databases/*/bar',
    ]


def test_make_database_dump_patterns_treats_empty_names_as_matching_all_databases():
    flexmock(module).should_receive('make_database_dump_filename').with_args('*', '*').and_return(
        'databases/*/*'
    )

    assert module.make_database_dump_patterns(()) == ['databases/*/*']


def test_convert_glob_patterns_to_borg_patterns_removes_leading_slash():
    assert module.convert_glob_patterns_to_borg_patterns(('/etc/foo/bar',)) == ['sh:etc/foo/bar']


def test_get_database_names_from_dumps_gets_names_from_filenames_matching_globs():
    flexmock(module.glob).should_receive('glob').and_return(
        ('databases/localhost/foo',)
    ).and_return(('databases/localhost/bar',)).and_return(())

    assert module.get_database_names_from_dumps(
        ('databases/*/foo', 'databases/*/bar', 'databases/*/baz')
    ) == ['foo', 'bar']