use indexmap::IndexMap;
use log::{error, info};
use reqwest::header;
use serde_derive::Deserialize;
use simple_logger;
use std::io::{Error, ErrorKind};
use std::path::PathBuf;
use std::{fs, thread, time};
use time::Duration;
use winreg::RegKey;

mod cgg_data_source;
mod data_source;
mod kb_data_source;
mod pb_data_source;

use cgg_data_source::CGGDataSource;
use data_source::DataSource;
use kb_data_source::KBDataSource;
use pb_data_source::PBDataSource;

#[derive(Deserialize)]
struct Realm {
    v: String,
}

#[derive(Deserialize)]
struct Champion {
    data: IndexMap<String, ChampInfo>,
}

#[derive(Deserialize)]
struct ChampInfo {
    name: String,
}

const USER_AGENT: &str =
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0";
const LOL_CHAMPS_DIR: &str = ".\\champs";

fn main() {
    simple_logger::init_with_level(log::Level::Info).unwrap();

    info!("CGG Item Sets");

    let lol_champs_dir = match lol_champ_dir() {
        Ok(x) => x,
        Err(_e) => PathBuf::from(LOL_CHAMPS_DIR),
    };
    info!("LoL Champs Folder: {}", lol_champs_dir.to_str().unwrap());

    let mut headers = header::HeaderMap::new();
    headers.insert(
        header::USER_AGENT,
        header::HeaderValue::from_static(USER_AGENT),
    );

    let client = reqwest::Client::builder()
        .default_headers(headers)
        .timeout(Duration::from_secs(10))
        .build()
        .unwrap();

    let realm: Realm = client
        .get("https://ddragon.leagueoflegends.com/realms/euw.json")
        .send()
        .unwrap()
        .json()
        .unwrap();
    info!("LoL version: {}", realm.v);

    let champion: Champion = client
        .get(&format!(
            "https://ddragon.leagueoflegends.com/cdn/{}/data/en_US/champion.json",
            realm.v
        ))
        .send()
        .unwrap()
        .json()
        .unwrap();
    info!("LoL numbers of champs: {}", champion.data.len());

    let data_sources: [Box<dyn DataSource>; 3] = [
        Box::new(PBDataSource),
        Box::new(CGGDataSource),
        Box::new(KBDataSource::new(&client)),
    ];

    for data_source in data_sources.iter() {
        let (champs, patch) = data_source.get_champs_with_positions_and_patch(&client);

        info!("{} version: {}", data_source.get_alias(), patch);
        info!(
            "{} numbers of champs: {}",
            data_source.get_alias(),
            champs.len()
        );

        for (id, positions) in &champs {
            if champion.data.contains_key(id) {
                let path = lol_champs_dir.join(&id).join("Recommended");
                fs::create_dir_all(&path).unwrap();
                for pos in positions {
                    data_source.write_item_set(
                        &id,
                        &champion.data.get(id).unwrap().name,
                        &pos,
                        &patch,
                        &path,
                        &client,
                    );
                    thread::sleep(Duration::from_millis(300));
                }
            } else {
                error!("{} not found in LoL champs", &id);
            }
        }
    }
}

fn lol_champ_dir() -> Result<PathBuf, Error> {
    let hklm = RegKey::predef(winreg::enums::HKEY_LOCAL_MACHINE);
    let node = hklm.open_subkey(r"SOFTWARE\WOW6432Node\Riot Games\RADS");
    let path: PathBuf;
    if node.is_ok() {
        let val: String = node?.get_value("LocalRootFolder")?;
        path = PathBuf::from(val).parent().unwrap().to_path_buf();
    } else {
        let node = hklm.open_subkey(r"SOFTWARE\WOW6432Node\Riot Games, Inc\League of Legends");
        if node.is_ok() {
            let val: String = node?.get_value("Location")?;
            path = PathBuf::from(val);
        } else {
            let mut node = hklm
                .open_subkey(r"SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall")?;

            let key = node
                .enum_keys()
                .map(|x| x.unwrap())
                .find(|x| x.starts_with("League of Legends"));

            if key == None {
                return Err(Error::new(ErrorKind::NotFound, ""));
            }

            node = node.open_subkey(key.unwrap())?;
            let val: String = node.get_value("InstallLocation")?;
            path = PathBuf::from(val);
        }
    }
    Ok(path.join("Config").join("Champions"))
}