#![feature(custom_derive,plugin)]
#![plugin(serde_macros)]
extern crate hyper;
extern crate irc;
extern crate serde;
extern crate serde_json;

use std::collections::HashMap;
use std::io::Read;

use hyper::Client;
use hyper::header::Connection;

use irc::client::prelude::*;

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct WikiPage {
    ns: u32,
    pageid: u32,
    title: String,
    extract: String,
}

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct WikiRedirect {
    from: String,
    to: String,
}

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct WikiQueryResponse {
    batchcomplete: String,
    query: WikiQuery,
}

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct WikiQuery {
    redirects: Option<Vec<WikiRedirect>>,
    pages: HashMap<String, WikiPage>,
}

fn main() {
    let q: WikiQueryResponse = serde_json::from_str("{\"batchcomplete\":\"\",\"query\":{\"pages\":{\"18123\":{\"pageid\":18123,\"ns\":0,\"title\":\"Lisp machine\",\"extract\":\"Lisp machines are general-purpose computers designed to efficiently run Lisp as their main software language, usually through hardware support. They are an example of a high-level language computer architecture, and in a sense, they were the first commercial single-user workstations. Despite being modest in number (perhaps 7,000 units total as of 1988), Lisp machines commercially pioneered many now-commonplace technologies \\u2013 including effective garbage collection, laser printing, windowing systems, computer mice, high-resolution bit-mapped graphics, computer graphic rendering, and networking innovations like Chaosnet. Several companies built and sold Lisp Machines in the 1980s: Symbolics (3600, 3640, XL1200, MacIvory, and other models), Lisp Machines Incorporated (LMI Lambda), Texas Instruments (Explorer and MicroExplorer), and Xerox (Interlisp-D workstations). The operating systems were written in Lisp Machine Lisp, InterLisp (Xerox), and later partly in Common Lisp.\"}}}}").unwrap();
    println!("{:?}", q);
    let config = Config {
        nickname: Some(format!("lidavidm_prime")),
        server: Some(format!("irc.freenode.net")),
        channels: Some(vec![format!("#opensourcecornell")]),
        .. Default::default()
    };
    let server = IrcServer::from_config(config).unwrap();
    server.identify().unwrap();
    for message in server.iter() {
        let message = message.unwrap(); // We'll just panic if there's an error.
        print!("{}", message.into_string());
        if &message.command[..] == "PRIVMSG" {
            if let Some(msg) = message.suffix {
                if msg.starts_with("!wiki") {
                    let article = msg[5..].trim();
                    let response = format!("Looking up \"{}\" on Wikipedia for you...", article);
                    server.send_privmsg(&message.args[0], &response).unwrap();

                    let mut client = Client::new();
                    let mut res = client
                        .get(&format!("https://en.wikipedia.org/w/api.php?action=query&prop=extracts&format=json&exintro=&explaintext=&titles={}&redirects=", article.replace(" ", "%20")))
                        .header(hyper::header::UserAgent("lidavidm_irc_bot/0.1 (https://git.lidavidm.me; li.davidm96@gmail.com) hyper/0.7.2".to_owned()))
                        .header(Connection::close())
                        .send().unwrap();

                    let mut body = String::new();
                    res.read_to_string(&mut body).unwrap();

                    let response: serde_json::Result<WikiQueryResponse> = serde_json::from_str(&body);
                    if let Ok(q) = response {
                        for page in q.query.pages.values() {
                            let url = format!("https://en.wikipedia.org/?curid={}", page.pageid);
                            server.send_privmsg(&message.args[0], &format!("{}: {}", page.title, url)).unwrap();
                            server.send_privmsg(&message.args[0], &page.extract).unwrap();
                            break;
                        }
                    }
                    else {
                        server.send_privmsg(&message.args[0], "Sorry, I couldn't retrieve the wiki page.").unwrap();
                        println!("{} {:?}", body, response);
                    }
                }
            }
        }
    }
}