/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * 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 com.android.settings.spa.core.instrumentation

import androidx.annotation.VisibleForTesting

/**
 * This class stores some metrics temporary data. Such as the timestamp of the page enter for
 * calculating the duration time on page.
 */
class MetricsDataModel {
    @VisibleForTesting
    val pageTimeStampList = mutableListOf<PageTimeStamp>()

    fun addTimeStamp(dataItem: PageTimeStamp){
        pageTimeStampList.add(dataItem)
    }

    fun getPageDuration(pageId: String, removed: Boolean = true): String {
        val lastItem = pageTimeStampList.findLast { it.pageId == pageId }
        if (removed && lastItem != null) {
            pageTimeStampList.remove(lastItem)
        }
        return if (lastItem == null) "0"
            else (System.currentTimeMillis() - lastItem.timeStamp).toString()
    }
}
