#![cfg_attr(
    all(not(debug_assertions), target_os = "windows"),
    windows_subsystem = "windows"
)]

use dunce::canonicalize;
use std::path::Path;
use theseus::{prelude::*, profile_create::profile_create};
use tokio::process::Child;
use tokio::sync::RwLockWriteGuard;

// A simple Rust implementation of the authentication run
// 1) call the authenticate_begin_flow() function to get the URL to open (like you would in the frontend)
// 2) open the URL in a browser
// 3) call the authenticate_await_complete_flow() function to get the credentials (like you would in the frontend)
pub async fn authenticate_run() -> theseus::Result<Credentials> {
    println!("A browser window will now open, follow the login flow there.");
    let url = auth::authenticate_begin_flow().await?;

    println!("URL {}", url.as_str());
    webbrowser::open(url.as_str())?;

    let credentials = auth::authenticate_await_complete_flow().await?;
    State::sync().await?;

    println!("Logged in user {}.", credentials.username);
    Ok(credentials)
}

#[tokio::main]
async fn main() -> theseus::Result<()> {
    println!("Starting.");

    // Initialize state
    let st = State::get().await?;

    // Set max concurrent downloads to 10
    st.settings.write().await.max_concurrent_downloads = 10;

    // Example variables for simple project case
    let name = "Example".to_string();
    let game_version = "1.19.2".to_string();
    let modloader = ModLoader::Vanilla;
    let loader_version = "stable".to_string();

    // let icon = Some(
    //     Path::new("../icon_test.png")
    //         .canonicalize()
    //         .expect("Icon could be not be found. If not using, set to None"),
    // );
    let icon = None;

    // Clear profiles
    println!("Clearing profiles.");
    let h = profile::list().await?;
    for (path, _) in h.into_iter() {
        profile::remove(&path).await?;
    }

    println!("Creating/adding profile.");
    // Attempt to create a profile. If that fails, try adding one from the same path.
    // TODO: actually do a nested error check for the correct profile error.
    let profile_path = profile_create(
        name.clone(),
        game_version,
        modloader,
        loader_version,
        icon,
    )
    .await?;
    State::sync().await?;

    //  async closure for testing any desired edits
    // (ie: changing the java runtime of an added profile)
    println!("Editing.");
    profile::edit(&profile_path, |profile| {
        // Eg: Java. TODO: hook up to jre.rs class to pick optimal java
        profile.java = Some(JavaSettings {
            install: Some(Path::new("/usr/bin/java").to_path_buf()),
            extra_arguments: None,
        });
        async { Ok(()) }
    })
    .await?;
    State::sync().await?;

    // Attempt to get the default user, if it exists, and refresh their credentials
    let default_user_uuid = {
        let settings = st.settings.read().await;
        settings.default_user
    };
    let credentials = if let Some(uuid) = default_user_uuid {
        println!("Attempting to refresh existing authentication.");
        auth::refresh(uuid, false).await
    } else {
        println!("Freshly authenticating.");
        authenticate_run().await
    };

    // Check attempt to get Credentials
    // If successful, run the profile and store the RwLock to the process
    let proc_lock = match credentials {
        Ok(credentials) => {
            println!("Preparing to run Minecraft.");
            profile::run(&canonicalize(&profile_path)?, &credentials).await
        }
        Err(e) => {
            // If Hydra could not be accessed, for testing, attempt to load credentials from disk and do the same
            println!("Could not authenticate: {}.\nAttempting stored authentication.",e);
            let users = auth::users().await.expect(
                "Could not access any stored users- state was dropped.",
            );
            let credentials = users
                .first()
                .expect("Hydra failed, and no stored users were found.");
            println!("Preparing to run Minecraft.");
            profile::run(&canonicalize(&profile_path)?, credentials).await
        }
    }?;

    // Spawn a thread and hold the lock to the process until it ends
    println!("Started Minecraft. Waiting for process to end...");
    let mut proc: RwLockWriteGuard<Child> = proc_lock.write().await;
    profile::wait_for(&mut proc).await?;

    Ok(())
}