try:
    from ._version import __version__
except ImportError:
    # Fallback when using the package in dev mode without installing
    # in editable mode with pip. It is highly recommended to install
    # the package from a stable release or in editable mode: https://pip.pypa.io/en/stable/topics/local-project-installs/#editable-installs
    import warnings
    warnings.warn("Importing 'snapshot' outside a proper installation.")
    __version__ = "dev"
from .config import SnapshotConfig
from .routes import setup_route_handlers
from .storage import create_storage
from .store import SnapshotStore


def _jupyter_labextension_paths():
    return [{
        "src": "labextension",
        "dest": "snapshot"
    }]


def _jupyter_server_extension_points():
    return [{
        "module": "snapshot"
    }]


def _load_jupyter_server_extension(server_app):
    """Registers the API handler to receive HTTP requests from the frontend extension.

    Parameters
    ----------
    server_app: jupyterlab.labapp.LabApp
        JupyterLab application instance
    """
    config = SnapshotConfig(config=server_app.config)
    storage = create_storage(
        storage_type=config.storage_type,
        root_dir=server_app.root_dir,
        local_root=config.local_root,
        endpoint=config.s3_endpoint,
        access_key=config.s3_access_key,
        secret_key=config.s3_secret_key,
        bucket=config.s3_bucket,
        secure=config.s3_secure,
        prefix=config.s3_prefix,
    )
    server_app.web_app.settings["snapshot_config"] = config
    server_app.web_app.settings["snapshot_storage"] = storage
    server_app.web_app.settings["snapshot_store"] = SnapshotStore(storage)
    if config.storage_type == "s3":
        server_app.log.info(
            f"Snapshot S3 storage ready: endpoint={config.s3_endpoint}, "
            f"bucket={config.s3_bucket}, secure={config.s3_secure}"
        )
    else:
        server_app.log.info(
            f"Activated snapshot storage backend: {config.storage_type}"
        )

    setup_route_handlers(server_app.web_app)
    name = "snapshot"
    server_app.log.info(f"Registered {name} server extension")