/* *
 *
 *  (c) 2015-2023 Oystein Moseng
 *
 *  License: www.highcharts.com/license
 *
 *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
 *
 *  Mixin for downloading content in the browser
 *
 * */
'use strict';
/* *
 *
 *  Imports
 *
 * */
import H from '../Core/Globals.js';
const { isSafari, win, win: { document: doc } } = H;
/* *
 *
 *  Constants
 *
 * */
const domurl = win.URL || win.webkitURL || win;
/* *
 *
 *  Functions
 *
 * */
/**
 * Convert base64 dataURL to Blob if supported, otherwise returns undefined.
 * @private
 * @function Highcharts.dataURLtoBlob
 * @param {string} dataURL
 *        URL to convert
 * @return {string|undefined}
 *         Blob
 */
function dataURLtoBlob(dataURL) {
    const parts = dataURL
        .replace(/filename=.*;/, '')
        .match(/data:([^;]*)(;base64)?,([0-9A-Za-z+/]+)/);
    if (parts &&
        parts.length > 3 &&
        (win.atob) &&
        win.ArrayBuffer &&
        win.Uint8Array &&
        win.Blob &&
        (domurl.createObjectURL)) {
        // Try to convert data URL to Blob
        const binStr = win.atob(parts[3]), buf = new win.ArrayBuffer(binStr.length), binary = new win.Uint8Array(buf);
        for (let i = 0; i < binary.length; ++i) {
            binary[i] = binStr.charCodeAt(i);
        }
        return domurl
            .createObjectURL(new win.Blob([binary], { 'type': parts[1] }));
    }
}
/**
 * Download a data URL in the browser. Can also take a blob as first param.
 *
 * @private
 * @function Highcharts.downloadURL
 * @param {string|global.URL} dataURL
 *        The dataURL/Blob to download
 * @param {string} filename
 *        The name of the resulting file (w/extension)
 * @return {void}
 */
function downloadURL(dataURL, filename) {
    const nav = win.navigator, a = doc.createElement('a');
    // IE specific blob implementation
    // Don't use for normal dataURLs
    if (typeof dataURL !== 'string' &&
        !(dataURL instanceof String) &&
        nav.msSaveOrOpenBlob) {
        nav.msSaveOrOpenBlob(dataURL, filename);
        return;
    }
    dataURL = '' + dataURL;
    const // Some browsers have limitations for data URL lengths. Try to convert
    // to Blob or fall back. Edge always needs that blob.
    isOldEdgeBrowser = /Edge\/\d+/.test(nav.userAgent), 
    // Safari on iOS needs Blob in order to download PDF
    safariBlob = (isSafari &&
        typeof dataURL === 'string' &&
        dataURL.indexOf('data:application/pdf') === 0);
    if (safariBlob || isOldEdgeBrowser || dataURL.length > 2000000) {
        dataURL = dataURLtoBlob(dataURL) || '';
        if (!dataURL) {
            throw new Error('Failed to convert to blob');
        }
    }
    // Try HTML5 download attr if supported
    if (typeof a.download !== 'undefined') {
        a.href = dataURL;
        a.download = filename; // HTML5 download attribute
        doc.body.appendChild(a);
        a.click();
        doc.body.removeChild(a);
    }
    else {
        // No download attr, just opening data URI
        try {
            if (!win.open(dataURL, 'chart')) {
                throw new Error('Failed to open window');
            }
        }
        catch {
            // If window.open failed, try location.href
            win.location.href = dataURL;
        }
    }
}
/* *
 *
 *  Default Export
 *
 * */
const DownloadURL = {
    dataURLtoBlob,
    downloadURL
};
export default DownloadURL;
