/*
 * Copyright 2022 Google LLC
 *
 * 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
 *
 *     https://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 { getNavigationEntry } from './getNavigationEntry.js';
export const getLoadState = (timestamp) => {
    if (document.readyState === 'loading') {
        // If the `readyState` is 'loading' there's no need to look at timestamps
        // since the timestamp has to be the current time or earlier.
        return 'loading';
    }
    else {
        const navigationEntry = getNavigationEntry();
        if (navigationEntry) {
            if (timestamp < navigationEntry.domInteractive) {
                return 'loading';
            }
            else if (navigationEntry.domContentLoadedEventStart === 0 ||
                timestamp < navigationEntry.domContentLoadedEventStart) {
                // If the `domContentLoadedEventStart` timestamp has not yet been
                // set, or if the given timestamp is less than that value.
                return 'dom-interactive';
            }
            else if (navigationEntry.domComplete === 0 ||
                timestamp < navigationEntry.domComplete) {
                // If the `domComplete` timestamp has not yet been
                // set, or if the given timestamp is less than that value.
                return 'dom-content-loaded';
            }
        }
    }
    // If any of the above fail, default to loaded. This could really only
    // happy if the browser doesn't support the performance timeline, which
    // most likely means this code would never run anyway.
    return 'complete';
};