// ==UserScript==
// @name     AliExpress Shipping Countries
// @version  1
// @include  https://www.aliexpress.com/wholesale*
// @include  https://www.aliexpress.com/w/wholesale*
// @grant    GM.xmlHttpRequest
// @run-at   document-start
// ==/UserScript==
//
// Licensed as public domain under the terms of Unlicense <http://unlicense.org/>

            const Event = class {
                constructor(script, target) {
                    this.script = script;
                    this.target = target;

                    this._cancel = false;
                    this._replace = null;
                    this._stop = false;
                }

                preventDefault() {
                    this._cancel = true;
                }
                stopPropagation() {
                    this._stop = true;
                }
                replacePayload(payload) {
                    this._replace = payload;
                }
            };

            let callbacks = [];
            window.addBeforeScriptExecuteListener = (f) => {
                if (typeof f !== "function") {
                    throw new Error("Event handler must be a function.");
                }
                callbacks.push(f);
            };
            window.removeBeforeScriptExecuteListener = (f) => {
                let i = callbacks.length;
                while (i--) {
                    if (callbacks[i] === f) {
                        callbacks.splice(i, 1);
                    }
                }
            };

            const dispatch = (script, target) => {
                if (script.tagName !== "SCRIPT") {
                    return;
                }

                const e = new Event(script, target);

                if (typeof window.onbeforescriptexecute === "function") {
                    try {
                        window.onbeforescriptexecute(e);
                    } catch (err) {
                        console.error(err);
                    }
                }

                for (const func of callbacks) {
                    if (e._stop) {
                        break;
                    }
                    try {
                        func(e);
                    } catch (err) {
                        console.error(err);
                    }
                }

                if (e._cancel) {
                    script.textContent = "";
                    script.remove();
                } else if (typeof e._replace === "string") {
                    script.textContent = e._replace;
                }
            };
            const observer = new MutationObserver((mutations) => {
                for (const m of mutations) {
                    for (const n of m.addedNodes) {
                        dispatch(n, m.target);
                    }
                }
            });
            observer.observe(document, {
                childList: true,
                subtree: true,
            });

            window.onbeforescriptexecute = (e) => {
                // You should check if textContent exists as this property is
                // buggy sometimes
                if (!e.script.textContent) {
                    return;
                }

                // Prevent execution of a script
                if (e.script.textContent.includes("alert")) {
                    e.preventDefault();
                }

                // Change the code that runs
                if (e.script.textContent.includes("refineShipFromCountries")) {
                    // Original payload is e.script.textContent, you can
                    // manipulate it however you want, just pass the final
                    // payload to e.replacePayload when you are done
                    //e.replacePayload("console.log(2);");
                    //e.preventDefault();
                    e.replacePayload(e.script.textContent.replace('"refineShipFromCountries":[', '"refineShipFromCountries":[{countryCode: "CZ", countryName: "Czechia", selected: false},{countryCode: "PL", countryName: "Poland", selected: false},{countryCode: "DE", countryName: "Germany", selected: false},{countryCode: "FR", countryName: "France", selected: false},{countryCode: "ES", countryName: "Spain", selected: false},{countryCode: "IT", countryName: "Italy", selected: false},'));
                    // Later event handlers can override your payload, you
                    // can call e.stopPropagation to make sure the current
                    // payload is applied
                }
            };