import json
from pathlib import Path


DEFAULT_CONFIG_PATH = Path("/etc/fester/storage.json")


DEFAULT_CONFIG = {
    "tmpfs": True,
    "btrfs": False,
    "qcow2_freeze": False,
    "btrfs_path": "/var/lib/fester/cas",
    "tmpfs_path": "/dev/shm/fester-build",
    "qcow2_path": "/var/lib/fester/snapshots"
}


def load_storage_config():
    if not DEFAULT_CONFIG_PATH.exists():
        return DEFAULT_CONFIG

    try:
        with open(DEFAULT_CONFIG_PATH) as f:
            user_cfg = json.load(f)
    except:
        user_cfg = {}

    cfg = DEFAULT_CONFIG.copy()
    cfg.update(user_cfg)

    return cfg