// Copyright (C) The Arvados Authors. All rights reserved.
//
// SPDX-License-Identifier: AGPL-3.0

import { REDIRECT_TO_DOWNLOAD_KEY, REDIRECT_TO_PREVIEW_KEY } from "common/redirect-to";
import { extractUuidKind, ResourceKind } from "models/resource";

export const sanitizeToken = (href: string, tokenAsQueryParam = true): string => {
    const [prefix, suffix] = href.split('/t=');
    const [token1, token2, token3, ...rest] = suffix.split('/');
    const token = `${token1}/${token2}/${token3}`;
    const sep = href.indexOf("?") > -1 ? "&" : "?";

    return `${[prefix, ...rest].join('/')}${tokenAsQueryParam ? `${sep}api_token=${token}` : ''}`;
};

/**
 * @returns A shareable token-free WB2 url that redirects to keep-web after login
 */
export const getCollectionItemClipboardUrl = (href: string, shouldSanitizeToken = true, inline = false): string => {
    const { origin } = window.location;
    const url = shouldSanitizeToken ? sanitizeToken(href, false) : href;
    const redirectKey = inline ? REDIRECT_TO_PREVIEW_KEY : REDIRECT_TO_DOWNLOAD_KEY;

    if (shouldSanitizeToken) {
        // "url" is path-percent-encoded (from WebDAV response); but valid
        // encoded path may contain & and + that may cause trouble or confusion
        // if directly put into query part; normalize it.
        const decodedPath = decodeURIComponent(url);
        // To emulate server-sent redirect verbatim; don't encode / and =
        const queryEncodedPath = decodedPath.split(/([/=])/)
                                            .map(s => /^[/=]$/.test(s) ? s : encodeURIComponent(s))
                                            .join("");
        return `${origin}/?${redirectKey}=${queryEncodedPath}`;
    } else {
        // Force the input to be a path and normalize leading slashes
        return `${origin}${("/" + url).replace(/^(\/|%2F)+/i, "/")}`;
    }
};

export const getInlineFileUrl = (url: string, keepWebSvcUrl: string, keepWebInlineSvcUrl: string): string => {
    const collMatch = url.match(/\/c=([a-z0-9-+]+)\//);
    if (collMatch === null) { return ''; }
    if (extractUuidKind(collMatch[1]) !== ResourceKind.COLLECTION) { return ''; }
    const collId = collMatch[1].replace('+', '-');
    let inlineUrl = keepWebInlineSvcUrl !== ""
        ? url.replace(keepWebSvcUrl, keepWebInlineSvcUrl)
        : url;
    let uuidOnHostname = false;
    // Inline URLs as 'https://*.collections.example.com' or
    // 'https://*--collections.example.com' should get the uuid on their hostnames
    // See: https://doc.arvados.org/v2.1/api/keep-web-urls.html
    if (inlineUrl.indexOf('*.') > -1) {
        inlineUrl = inlineUrl.replace('*.', `${collId}.`);
        uuidOnHostname = true;
    } else if (inlineUrl.indexOf('*--') > -1) {
        inlineUrl = inlineUrl.replace('*--', `${collId}--`);
        uuidOnHostname = true;
    }
    if (uuidOnHostname) {
        inlineUrl = inlineUrl.replace(`/c=${collMatch[1]}`, '');
    }
    return inlineUrl;
};

export const isInlineFileUrlSafe = (url: string, keepWebSvcUrl: string, keepWebInlineSvcUrl: string): boolean => {
  let inlineUrl = keepWebInlineSvcUrl !== ""
      ? url.replace(keepWebSvcUrl, keepWebInlineSvcUrl)
      : url;
  return inlineUrl.indexOf('*.') > -1;
}