// Copyright (c) 2022 Alibaba Group Holding Ltd.
//
// 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 main

import "github.com/higress-group/wasm-go/pkg/log"

func onWeightRequestHeaders(weightGroups []WeightGroup, randomNum uint64, log log.Log) bool {
	randomValue := randomNum % TotalWeight
	log.Debugf("random value for weighted headers : %d", randomValue)
	// CDF
	for _, wg := range weightGroups {
		if randomValue < uint64(wg.Accumulate) {
			addTagHeader(wg.HeaderName, wg.HeaderValue, log)
			return true
		}
	}

	return false
}
