extern crate markup5ever_rcdom as rcdom;
extern crate html5ever;

use std::rc::Rc;
use db::connect;
use html5ever::{parse_document, tendril::TendrilSink, tree_builder::TreeBuilderOpts, ParseOpts};
use rcdom::{Node, RcDom};
use surrealdb::{engine::remote::ws::Client, Surreal};
use tracing::{debug, info, warn};

mod db;

#[tokio::main]
async fn main() {
    tracing_subscriber::fmt::init();
    debug!("Starting...");

    let url = "https://oliveratkinson.net";
    
    let db = connect().await.expect("Failed to connect to db, aborting.");
    let dom = get(url).await;

    walk(&dom, &db, url).await;

    info!("Done");
}

async fn get(url: &str) -> Rc<Node> {
    let response = reqwest::get(url).await.unwrap();
    let data = response.text().await.unwrap();

    let opts = ParseOpts {
        tree_builder: TreeBuilderOpts {
            drop_doctype: true,
            ..Default::default()
        },
        ..Default::default()
    };

    let dom = parse_document(RcDom::default(), opts)
        .from_utf8()
        .read_from(&mut data.as_bytes())
        .unwrap();
    dom.document
}

async fn walk(node: &rcdom::Handle, db: &Surreal<Client> , site_name: &str) {
    // Insert Or Update
    let _created: Vec<db::Record> = match db.upsert("website").content(db::Website { href: String::from("/"), crawled: true, site: site_name.to_string() } ).await {
        Ok(e) => {
            // Return this for type coercion
            e
        },
        Err(e) => {
            unimplemented!("{}", e);
        }
    };

    match &node.data {
        rcdom::NodeData::Element { name, attrs, template_contents, mathml_annotation_xml_integration_point } => {
            for attr in attrs.borrow().clone() {
                let name = name.local.to_string();
                if name == "a" {
                    if attr.value.starts_with("mailto") {
                        // mailto link, lol
                        let created: Option<db::Record> = db.create("email").content(db::Email {
                            email: attr.value.to_string()
                        }).await.unwrap();
                        warn!("{:?}", created)
                    } else {
                        let href = attr.value.to_string();
                        info!("{}", href);
                        // Every not-mailto link
                        let _created: Option<db::Record> = db.create("website").content(db::Website {
                            href,
                            crawled: false,
                            site: site_name.to_string()
                        }).await.unwrap();
                    }
                }
            };
        },
        _ => {},
    };

    for child in node.children.borrow().iter() {
        Box::pin(walk(child, db, site_name)).await; 
    }
}