// This is the test file for the library, different tests are ran in here.
import {Rule34xxx} from "./module/rule34xxx";
import {Post} from "./type/generic";
import * as fs from "fs/promises";

( async () => {
    // Initialize the rule34 module
    const r34: Rule34xxx = new Rule34xxx();
    r34.verbose = true;
    
    // Run the get post Details function
    let pageList: Array<string>;
    await r34.crawlPages(`https://rule34.xxx/index.php?page=post&s=list&tags=sort%3Ascore%3Adesc+id%3A%3E4563063&pid=252`, 20)
    .then(  postData => {
        pageList = postData;
    })
    .catch( err => { 
        console.log(err); 
    });

    // Now grab all posts on all of those pages
    let postLinks: Array<string> = [];
    for ( let page of pageList ) {
        await r34.getPostsFromPage(page)
        .then( posts => {
            // Combine the two arrays
            postLinks = [...postLinks, ...posts];
        })
        .catch( err => {
            console.error(err);
        })
    }

    /**
     * The definitive list of posts
     */
    const postList: Array<Post> = [];
    
    /**
     * The amount of posts to fetch per cycle
     */
    const concurrency: number = 3;

    for ( let i = 0; i < postLinks.length; i++ ) {
        const promiseList: Array<Promise<Post>> = [];
        for ( let j = 0; j < concurrency; j++ ) {
            // Add the link to the crawler's buffer
            promiseList.push(r34.getPostDetails(postLinks[i]));
            i++;
        }

        // Wait for all promises to settle
        await Promise.allSettled(promiseList)
        .then( result => {
            // Append the results to the postList
            for ( let p of result ) {
                postList.push(((p as any).value as Post));
            }
        })
        .catch( err => {
            console.error(`err: `, err);
        })
        .finally(() => {
            console.log(`[${i}/${postLinks.length}][${(i/postLinks.length * 100).toFixed(2)}%] Scrapping...`);
        })
    }

    console.log(`Done!`);

    await fs.writeFile(`./export/r34xxx_pageList_example.json`, JSON.stringify(pageList, null, 4));
    await fs.writeFile(`./export/r34xxx_postLinks_example.json`, JSON.stringify(postLinks, null, 4));
    await fs.writeFile(`./export/r34xxx_postList_example.json`, JSON.stringify(postList, null, 4));

    // Display results
    console.log({
        pageList:  pageList.length,
        postLinks: postLinks.length,
        postList:  postList.length,
    });
})();