/**
 * Content script that pulls/queries  any necessary information.
 */

function sendMessage(type, data) {
	chrome.runtime.sendMessage({ type, data });
}

function init() {
	const urlParams = new URLSearchParams(window.location.search);
	let id = urlParams.get('id');
	if (!id) return;
	id = id.split('-')[0];

	// Check for error
	const error = document.querySelector('.standard_error');
	if (error) return sendMessage('badPage', id);

	// Scroll page title into view
	const contentDiv = document.getElementById('content');
	if (contentDiv) {
		contentDiv.scrollIntoView();
		window.scrollBy(0, -100);
	}
	else return;

	// Get max entry ID number to search from
	const topEntry = document.querySelector('#sidebar .blockbody a');
	if (topEntry) {
		const topEntryParams = new URLSearchParams(`?${topEntry.href.split('?')[1]}`);
		const topEntryID = topEntryParams.get('id').split('-')[0];
		sendMessage('topPage', topEntryID);
	}
	
	// Check if AI exists
	let aiImg = document.querySelector('.metadata img[alt="AI"]');
	if (aiImg) {
		aiImg = aiImg.parentElement.nextElementSibling;
		const text = aiImg.innerText || aiImg.textContent;
		if (!/yes/gi.test(text)) sendMessage('badPage', id);
	} else sendMessage('badPage', id);
}

init();