defaults = {
    'backups': {
        'paths': {
            '/var/lib/postgresql',
        },
    },
    'icinga2_api': {
        'postgresql': {
            'services': {
                'POSTGRESQL PROCESS': {
                    'command_on_monitored_host': '/usr/lib/nagios/plugins/check_procs -C postgres -c 1:',
                },
            },
        },
    },
    'postgresql': {
        'max_connections': 100,
        'autovacuum_max_workers': 3,
        'maintenance_work_mem': 64,
        'work_mem': 4,
        'shared_buffers': 128,
        'temp_buffers': 8,
        'slow_query_log_sec': 0,
    },
}

if node.has_bundle('zfs'):
    defaults['zfs'] = {
        'datasets': {
            'tank/postgresql': {
                'mountpoint': '/var/lib/postgresql',
            },
        },
    }


@metadata_reactor.provides(
    'apt/repos/postgresql',
    'postgresql/version',
)
def default_postgresql_version_for_debian(metadata):
    # <https://packages.debian.org/search?keywords=postgresql>
    versions_in_debian = {
        '10': '11', # buster
        '11': '13', # bullseye
    }
    os = str(node.os_version[0])
    version_to_be_installed = metadata.get('postgresql/version', versions_in_debian[os])

    if version_to_be_installed != versions_in_debian[os]:
        return {
            'apt': {
                'repos': {
                    'postgresql': {
                        'items': {
                            'deb https://apt.postgresql.org/pub/repos/apt/ {os_release}-pgdg main',
                        },
                    },
                },
            },
            'postgresql': {
                'version': version_to_be_installed,
            },
        }

    return {
        'postgresql': {
            'version': version_to_be_installed,
        },
    }