/*
 * Copyright (C)  2021-2022 Kristóf Marussy <kristof@marussy.com>
 *
 * This file is part of Sophie.
 *
 * Sophie is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */

import {
  defineProtoProperty,
  deleteProtoProperty,
  simulateNativeClass,
  simulateNativeFunction,
} from '../utils';

export function shimUserAgentData(chromeVersion: string | null, platform: string): void {
  const brands = [
    {
      brand: ' Not A; Brand',
      version: '99',
    },
  ];
  if (chromeVersion !== null) {
    brands.push({
      brand: 'Chromium',
      version: '96',
    });
  }
  const mobile = false;

  const simulatedNavigatorUa = simulateNativeClass('NavigatorUAData', function NavigatorUAData() {
    // Nothing to initiailize.
  }, {
    brands: {
      configurable: true,
      enumerable: true,
      get: simulateNativeFunction('brands', () => brands),
    },
    mobile: {
      configurable: true,
      enumerable: true,
      get: simulateNativeFunction('mobile', () => mobile),
    },
    platform: {
      configurable: true,
      enumerable: true,
      get: simulateNativeFunction('platform', () => platform),
    },
    getHighEntropyValues: {
      configurable: true,
      enumerable: false,
      value: simulateNativeFunction('getHighEntropyValues', (...args: unknown[]) => {
        if (args.length == 0) {
          throw new TypeError("Failed to execute 'getHighEntropyValues' on 'NavigatorUAData': 1 argument required, but only 0 present.");
        }
        const hints = Array.from(args[0] as Iterable<string>);
        if (hints.length === 0) {
          return {};
        }
        const data: Record<string, unknown> = {
          brands,
          mobile,
        }
        if (hints.includes('platform')) {
          data['platform'] = platform;
        }
        return Promise.resolve(data);
      })
    },
    toJSON: {
      configurable: true,
      enumerable: false,
      value: simulateNativeFunction('toJSON', () => ({
        brands,
        mobile,
      })),
      writable: false,
    },
  });

  const simulatedUserAgentData = Reflect.construct(simulatedNavigatorUa, []);
  defineProtoProperty(globalThis.navigator, 'userAgentData', {
    configurable: true,
    enumerable: true,
    get: simulateNativeFunction('userAgentData', () => simulatedUserAgentData),
  });
}

export function deleteUserAgentData(): void {
  deleteProtoProperty(globalThis.navigator, 'userAgentData');
}