from bundlewrap.metadata import atomic

defaults = {
    'apt': {
        'packages': {
            'openjdk-17-jre': {},
        },
    },
    'backups': {
        'paths': {
            '/home/minecraft',
        },
    },
    'minecraft': {
        'java_opts': {
            # https://aikar.co/2018/07/02/tuning-the-jvm-g1gc-garbage-collector-flags-for-minecraft/
            '-Daikars.new.flags': 'true',
            '-Dusing.aikars.flags': 'https://mcflags.emc.gs',
            '-XX:+AlwaysPreTouch': None,
            '-XX:+DisableExplicitGC': None,
            '-XX:+ParallelRefProcEnabled': None,
            '-XX:+PerfDisableSharedMem': None,
            '-XX:+UnlockExperimentalVMOptions': None,
            '-XX:G1HeapRegionSize': '16M',
            '-XX:G1HeapWastePercent': 5,
            '-XX:G1MaxNewSizePercent': 50,
            '-XX:G1MixedGCCountTarget': 4,
            '-XX:G1MixedGCLiveThresholdPercent': 90,
            '-XX:G1NewSizePercent': 40,
            '-XX:G1RSetUpdatingPauseTimePercent': 5,
            '-XX:G1ReservePercent': 15,
            '-XX:InitiatingHeapOccupancyPercent': 20,
            '-XX:MaxGCPauseMillis': 200,
            '-XX:MaxTenuringThreshold': 1,
            '-XX:SurvivorRatio': 32,
        },
    },
    'users': {
        'minecraft': {},
    },
    'zfs': {
        'datasets': {
            'tank/minecraft': {},
            'tank/minecraft/overworld': {
                'mountpoint': '/home/minecraft/world',
                'compression': 'on',
                'needed_by': {
                    'directory:/home/minecraft/world',
                },
            },
            'tank/minecraft/nether': {
                'mountpoint': '/home/minecraft/world_nether',
                'compression': 'on',
                'needed_by': {
                    'directory:/home/minecraft/world_nether',
                },
            },
            'tank/minecraft/end': {
                'mountpoint': '/home/minecraft/world_the_end',
                'compression': 'on',
                'needed_by': {
                    'directory:/home/minecraft/world_the_end',
                },
            },
        },
    },
}


@metadata_reactor.provides(
    'minecraft/java_opts',
)
def heap_to_java_opts(metadata):
    heap_mb = metadata.get('minecraft/heap_mb')

    return {
        'minecraft': {
            'java_opts': {
                f'-Xms{heap_mb}M': None,
                f'-Xmx{heap_mb}M': None,
            },
        },
    }


@metadata_reactor.provides(
    'firewall/port_rules/25565',
)
def firewall(metadata):
    return {
        'firewall': {
            'port_rules': {
                '25565': atomic(metadata.get('minecraft/restrict-to', set())),
            },
        },
    }