//
//  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
//
//  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.
//

package task

import (
	"fmt"

	"github.com/cespare/xxhash/v2"
)

// ChunkID generates a deterministic chunk identifier matching Python's:
//
//	xxhash.xxh64((content_with_weight + str(doc_id)).encode("utf-8", "surrogatepass")).hexdigest()
func ChunkID(contentWithWeight, docID string) string {
	return fmt.Sprintf("%016x", xxhash.Sum64String(contentWithWeight+docID))
}