# Copyright 2024 Heinrich Krupp
#
# Licensed 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.

import hashlib


def generate_content_hash(content: str) -> str:
    """
    Generate a unique hash for content.

    Content identity is based solely on normalized content text.
    Same content always produces the same hash regardless of
    tags, memory_type, or other metadata (Issue #522).
    """
    # Normalize content
    normalized_content = content.strip().lower()

    # Generate hash
    return hashlib.sha256(normalized_content.encode('utf-8')).hexdigest()
