'use strict';

// Constants
const DEVICE_ID = '031_04'; // Found in the APK as @string/device_id
const BRAND_ID = '011'; // Selected from the function mapBrandCode(), which is found in embed.min.js (a script loaded by the website)

// Patch XMLHttpRequest.open
const oldOpen = XMLHttpRequest.prototype.open;
Object.defineProperty(XMLHttpRequest.prototype, 'open', {
    value: function (method, url, ...args) {
        // Flag
        this._isTargetUrl = (new URL(url)).pathname.endsWith('/playmanifest_secure.json');

        // Call Original Method
        oldOpen.call(this, method, url, ...args);
    },
    enumerable: false,
    configurable: false,
    writable: false
});

// Patch XMLHttpRequest.send
const oldSend = XMLHttpRequest.prototype.send;
Object.defineProperty(XMLHttpRequest.prototype, 'send', {
    value: function (body, ...args) {
        // Check
        if (body && this._isTargetUrl) {
            // Parse Request Body
            const params = new URLSearchParams(body);

            // Pretend to be an Android device
            if (params.has('device')) {
                params.set('device', DEVICE_ID);
            }
            
            // Switch brand to one without ads
            if (params.has('brand')) {
                params.set('brand', BRAND_ID);
            }

            // Apply Patch
            body = params.toString();

            // Verify
            this.addEventListener("load", function () {
                const obj = JSON.parse(this.responseText);
                const assetUrl = new URL(obj.video.assets.asset[0].value);
                console.log('Video Stream URL: ' + assetUrl);
            });
        }

        // Call Original Method
        oldSend.call(this, body, ...args);
    },
    enumerable: false,
    configurable: false,
    writable: false
});