/*
 * 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.
 */

package mem

import (
	"encoding/json"

	"github.com/yudai/gojsondiff"

	"github.com/apache/apisix-control-plane/pkg/log"
)

var (
	differ = gojsondiff.New()
)

func HasDiff(a, b interface{}) (bool, error) {
	aJSON, err := json.Marshal(a)
	if err != nil {
		return false, err
	}
	bJSON, err := json.Marshal(b)
	if err != nil {
		return false, err
	}
	if d, err := differ.Compare(aJSON, bJSON); err != nil {
		return false, err
	} else {
		log.Debugw("diff result", "deltas", d.Deltas())
		return d.Modified(), nil
	}
}

func Diff(a, b interface{}) (gojsondiff.Diff, error) {
	aJSON, err := json.Marshal(a)
	if err != nil {
		return nil, err
	}
	bJSON, err := json.Marshal(b)
	if err != nil {
		return nil, err
	}
	if d, err := differ.Compare(aJSON, bJSON); err != nil {
		return nil, err
	} else {
		return d, nil
	}
}