# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
"""The ir_builder subpackage of TVMScript.

Per-dialect builder submodules (``tvm.script.ir_builder.tirx``, etc.) are
resolved lazily via :data:`tvm.script._DIALECT_REGISTRY`.  When a dialect
is accessed (e.g. ``tvm.script.ir_builder.tirx``), this subpackage's
``__getattr__`` looks up the dialect in ``_DIALECT_REGISTRY`` and imports
``<dialect_module_path>.builder`` (e.g. ``tvm.tirx.script.builder``),
caching the result so subsequent accesses skip ``__getattr__``.

The IR layer is foundational and is NOT registered as a dialect — its
builder lives as a real submodule ``tvm.script.ir_builder.ir``.

See :mod:`tvm.script` for a full description of the dialect resolution
mechanism, including the ``_DialectRedirectFinder`` that handles
deep statement-form imports.
"""

import importlib
from typing import Any

from .base import IRBuilder


def __getattr__(name: str) -> Any:
    # Lazy import to avoid loading tvm.script during dialect bootstrap.
    from tvm.script import _DIALECT_REGISTRY  # pylint: disable=import-outside-toplevel

    if name in _DIALECT_REGISTRY:
        module = importlib.import_module(f"{_DIALECT_REGISTRY[name]}.builder")
        globals()[name] = module
        return module
    raise AttributeError(f"module 'tvm.script.ir_builder' has no attribute {name!r}")