// MAIN FUNCTION
// This function will scrape all the conversations from the chatorg website
// It will return an array of arrays, the outer array is of all conversation
// the inner array is a list of message pairs

// grab all anchors
// advance to the next anchor
// pull the current chat history







async function main(min = 0){
    // click all the empty chakra links
    let anchors = await clickEmptyChakraLinks()
    conversations = []
    // this is going to be a async for each of the anchors
    // for each anchor, click it, wait for the page to load, then scrape the conversation history
    for (let i = min; i < anchors.length; i++) {
        // click the anchor
        anchors[i].click()
        let title = anchors[i].innerText
        // wait for the page to load
        // let container = await loadHistory(link, chatContainer)
        await wait(3500)
        // for each child of the container, get the name from aria-label of the avatar and the content from the div.chat-message-wrapper
        // then push it to the conversations array
        let conversation = {title, messages: []}
        let container = document.querySelector('#chatlog')
        for(let j = 0; j < container.children.length - 1; j++){ // length - 1 because last message isn't real
            let child = container.children[j]
            try {
                console.log("querying ", j)
                let name = child.querySelector('.chakra-avatar div').getAttribute('aria-label') 
                let html = child.querySelector('.chat-message-wrapper').innerHTML
                conversation.messages.push({name, html})
            } catch(e){
                console.log("Failed to get name or html", j)
                console.warn(e)
            }
        }
        conversations[i] = conversation
        console.log("PUSHED CONVERSATION", title)
    }
    // download the conversation history
    downloadStringAsFile(JSON.stringify(conversations), 'conversationHistory.json')
}

// create a wait function to just throw some delay into the crawl
async function wait(ms){
    return new Promise(resolve => setTimeout(resolve, ms))
}

// Function definitions BEGIN

// first grab all the chakra links, filter by a tags with no href
// perform an asynchronous while loop to click the empty chakra-links recursively until no more exist
// this is a recursive function that will click all the empty chakra-links
function clickEmptyChakraLinks() {
    return new Promise(resolve => {
        // grab all the chakra links, filter by a tags with no href
        const emptyChakraLinks = Array.from(document.querySelectorAll('a.chakra-link')).filter(a => !a.href)
        // if there are no more empty chakra links, resolve the promise
        if (emptyChakraLinks.length === 0) {
            resolve(document.querySelectorAll('a.chakra-link[href^="/chat"]'))
        } else {
            // click the first empty chakra link
            emptyChakraLinks.forEach(a => a.click())
            // wait for the page to load
            setTimeout(() => {
                // recursively call the function
                clickEmptyChakraLinks().then(resolve)
            }, 100)
        }
    })
}

// clicking on each link will take a moment to load the next conversation
// so we need to wait for the page to load before clicking the next link
// lets watch the #chatlog element for changes
// use a mutation observer on the document to detect when the chat history is loaded

// So I need to detect when a new chatlog is loaded
// what happens when a history is clicked, is that the chatlog is first removed, and then later reappended
// so I need to detect when the chatlog is removed, and then when it is reappended
// so for every mutation, set a flag once there is no longer a chatlog, and then next time chatlog does exist, resolve the promise with the chatlog
function loadHistory(element, container){
    console.log("LOADING HISTORY", element.innerText)
    let chatlogRemoved = false
    element.click()
    // within the mutation observer, resolve once #chatlog exists & the removed flag had been set
    return new Promise((resolve) => {
        const observer = new MutationObserver(() => {
            // if the chat history is removed
            if (!container.querySelector('#chatlog')) {
                // set the removed flag
                chatlogRemoved = true
                console.log('!!! chatlog removed')
            } else if (chatlogRemoved) {
                // stop observing the document
                observer.disconnect()
                console.log('!!! resolving')
                // resolve the promise with the chatlog
                resolve(container.querySelector('#chatlog'))
            }
        })
        // start observing the document
        observer.observe(container, { childList: true, subtree: true })
    })
}

function downloadStringAsFile(str, filename = 'download.txt') {
    // Create a hidden button element
    const btn = document.createElement('button');
    btn.style.display = 'none';
    document.body.appendChild(btn);
  
    // Create a Blob object from the input string
    const blob = new Blob([str], { type: 'text/plain' });
    const url = URL.createObjectURL(blob);
  
    // Create an anchor element with download attribute
    const link = document.createElement('a');
    link.href = url;
    link.download = filename;
  
    // Add the anchor element to the button
    btn.appendChild(link);
  
    // Add a click event listener to the button to trigger the file download
    btn.addEventListener('click', (event) => {
      link.click();
      btn.remove()
    });
  
    // Click the button programmatically
    btn.click();
  }