// ==UserScript==
// @name         ExamPrepper Content Dumper
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Dump accordion content from ExamPrepper pages to OPFS (AJAX-aware)
// @match        https://www.examprepper.co/exam/*
// @grant        none
// ==/UserScript==

(async function() {
    'use strict';
alert('*')
    const FILENAME = 'questions.html';
    const PAGE_SEPARATOR = '\n\n';
    
    let isProcessing = false;
    let processedPages = new Set();
    
    console.log('[ExamPrepper Dumper] Script started');
    console.log('[ExamPrepper Dumper] Current URL:', window.location.href);
    
    // Wait 2 seconds for initial page load
    console.log('[ExamPrepper Dumper] Waiting 2 seconds for page to load...');
    await sleep(2000);
    
    // Process the first page
    await processPage();
    
    // Set up MutationObserver to detect AJAX page changes
    const observer = new MutationObserver(async (mutations) => {
        // Check if accordion items have changed (new page loaded)
        for (const mutation of mutations) {
            if (mutation.addedNodes.length > 0) {
                // Check if new accordion items were added
                const hasNewAccordion = Array.from(mutation.addedNodes).some(node => {
                    if (node.nodeType === 1) { // Element node
                        return node.classList?.contains('chakra-accordion__item') || 
                               node.querySelector?.('.chakra-accordion__item');
                    }
                    return false;
                });
                
                if (hasNewAccordion && !isProcessing) {
                    console.log('[ExamPrepper Dumper] New content detected after AJAX load');
                    await sleep(1000); // Give it a moment to settle
                    await processPage();
                }
            }
        }
    });
    
    // Start observing the document body for changes
    observer.observe(document.body, {
        childList: true,
        subtree: true
    });
    
    console.log('[ExamPrepper Dumper] Now monitoring for AJAX page changes...');
    
    async function processPage() {
        if (isProcessing) {
            console.log('[ExamPrepper Dumper] Already processing, skipping...');
            return;
        }
        
        isProcessing = true;
        
        try {
            // Get OPFS root
            const root = await navigator.storage.getDirectory();
            
            // Find all accordion items
            const accordionItems = document.querySelectorAll('.chakra-accordion__item');
            console.log(`[ExamPrepper Dumper] Found ${accordionItems.length} accordion items`);
            
            if (accordionItems.length === 0) {
                console.warn('[ExamPrepper Dumper] No accordion items found! Check if page loaded correctly or CAPTCHA present.');
                isProcessing = false;
                return;
            }
            
            // Create a unique page identifier (could use URL + first question text)
            const firstItemText = accordionItems[0]?.textContent?.substring(0, 100) || '';
            const pageId = window.location.href + firstItemText;
            
            if (processedPages.has(pageId)) {
                console.log('[ExamPrepper Dumper] This page was already processed, skipping...');
                isProcessing = false;
                return;
            }
            
            processedPages.add(pageId);
            console.log(`[ExamPrepper Dumper] Processing new page (total pages processed: ${processedPages.size})`);
            
            let pageContent = '';
            
            // Loop through each accordion item
            for (let i = 0; i < accordionItems.length; i++) {
                const item = accordionItems[i];
                console.log(`[ExamPrepper Dumper] Processing item ${i + 1}/${accordionItems.length}`);
                
                // Find "Show Answer" button within this item
                const buttons = item.querySelectorAll('button');
                let showAnswerButton = null;
                
                for (const button of buttons) {
                    if (button.textContent.trim() === 'Show Answer') {
                        showAnswerButton = button;
                        break;
                    }
                }
                
                if (showAnswerButton) {
                    console.log(`[ExamPrepper Dumper] Clicking "Show Answer" button for item ${i + 1}`);
                    showAnswerButton.click();
                    
                    // Wait 1 second after clicking
                    await sleep(1000);
                    
                    // Append outerHTML to content
                    pageContent += item.outerHTML;
                    console.log(`[ExamPrepper Dumper] Item ${i + 1} content captured`);
                } else {
                    console.warn(`[ExamPrepper Dumper] No "Show Answer" button found in item ${i + 1}`);
                }
            }
            
            // Append page content to file
            await appendToFile(root, FILENAME, pageContent + PAGE_SEPARATOR);
            console.log('[ExamPrepper Dumper] Content appended to file successfully');
            
            // Wait 2 more seconds
            console.log('[ExamPrepper Dumper] Waiting 2 seconds before looking for Next button...');
            await sleep(2000);
            
            // Find and click "Next" button
            const allButtons = document.querySelectorAll('button');
            let nextButton = null;
            
            for (const button of allButtons) {
                if (button.textContent.trim() === 'Next') {
                    nextButton = button;
                    break;
                }
            }
            
            if (nextButton) {
                console.log('[ExamPrepper Dumper] "Next" button found, clicking...');
                nextButton.click();
                console.log('[ExamPrepper Dumper] Waiting for AJAX to load next page...');
            } else {
                console.log('[ExamPrepper Dumper] No "Next" button found. Either all pages exhausted or CAPTCHA/error present.');
                console.log('[ExamPrepper Dumper] ✓ Scraping complete!');
                observer.disconnect(); // Stop observing
            }
            
        } catch (error) {
            console.error('[ExamPrepper Dumper] Error occurred:', error);
        } finally {
            isProcessing = false;
        }
    }
    
    // Helper function to sleep
    function sleep(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }
    
    // Helper function to append content to OPFS file
    async function appendToFile(root, filename, content) {
        const fileHandle = await root.getFileHandle(filename, { create: true });
        const writable = await fileHandle.createWritable({ keepExistingData: true });
        
        // Get current file size to append at the end
        const file = await fileHandle.getFile();
        const size = file.size;
        
        // Seek to end and write
        await writable.write({ type: 'write', position: size, data: content });
        await writable.close();
        
        console.log(`[ExamPrepper Dumper] Appended ${content.length} characters to ${filename} (total size: ${size + content.length} bytes)`);
    }
})();