const regex = /^\/api\/v1\/friendships\/([^/]+)\/followers\//;
const OriginalXHR = window.XMLHttpRequest;

window.XMLHttpRequest = function() {
	const xhr = new OriginalXHR();

	const open = xhr.open;
	xhr.open = function(method, url, ...rest) {	
		const match = url.match(regex);
		if (match) {
			const userId = match[1];
			console.log('User ID:', userId);
			console.log('Fetching data ...');
			linf(userId);
		}
		return open.apply(xhr, [method, url, ...rest]);
	};

	return xhr;
};

async function linf(userId) {

	async function fetchAllUsers(listType) {
		let maxId = null;
		let resultados = [];
		let urlBase = '/api/v1/friendships/' + userId + '/' + listType + '/';

		do {
			const url = maxId ? `${urlBase}?max_id=${maxId}` : urlBase;

			const response = await fetch(url, {
				method: 'GET',
				headers: {
					'x-ig-app-id': '936619743392459',
				}
			});
			if (!response.ok) {
			throw new Error(`Error en la petición: ${response.status}`);
			}

			const data = await response.json();
			resultados.push(...data.users);
			maxId = data.next_max_id;
		
		} while(maxId);

		return resultados;
	}

	const followers = await fetchAllUsers('followers');
	const following = await fetchAllUsers('following');

	console.clear();
	console.log(followers.length + ' followers');
	console.log(following.length + ' following');

	const followersIds = new Set(followers.map(user => user.id));
	const cabrones = following.filter(user => !followersIds.has(user.id));

	for(let cabron of cabrones) {
		console.log(cabron.full_name + ' (@' + cabron.username + ')');
	}
}

console.clear();

document.querySelectorAll('a[href]').forEach(n => {
	if (n.getAttribute('href').contains('/followers/')){
		n.click();
	}
});