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

use std::{
    path::{Path, PathBuf},
    sync::{Arc, Mutex},
    thread::sleep,
    time::Duration,
};

use audio::monitor;
use fs::WebRay;
use log::{debug, error, trace, warn};
use serde_json::Value;
use tauri::{
    api::path::{cache_dir, config_dir},
    Manager,
    State, //, WindowEvent,
};

use crate::config::Config;

mod audio;
mod config;
mod fs;

const MIC_THRESHOLD: f32 = 0.5f32;

struct MicThreshold(Arc<Mutex<f32>>);
struct AudioLevel(Arc<Mutex<f32>>);
struct BlinkInterval(Arc<Mutex<u64>>);
struct CurrentConfig(Arc<Mutex<Config>>);
struct RayToLoad(Arc<Mutex<Option<PathBuf>>>);
struct MicSense(Arc<Mutex<f32>>);

fn main() {
    env_logger::init();
    let threshold = Arc::new(Mutex::new(MIC_THRESHOLD));
    let level = Arc::new(Mutex::new(0.));
    let blink_interval = Arc::new(Mutex::new(1500));
    let ray = Arc::new(Mutex::new(None));
    let sens = Arc::new(Mutex::new(1.0));

    if let Some(d) = cache_dir() {
        use std::fs;
        if let Ok(s) = fs::read_to_string(d.join("cathode").join("last_selected")) {
            debug!("Found selected ray in cache");
            *ray.lock().unwrap() = Some(Path::new(&s).to_path_buf());
        }
    }

    // Create the config directory if needed
    let config = config::load_config();

    {
        *blink_interval.lock().unwrap() = config.blink_interval;
        *sens.lock().unwrap() = config.mic_sens;
    }

    let current_conf = Arc::new(Mutex::new(config));

    let config = current_conf.clone();
    // let c2 = current_conf.clone();
    tauri::Builder::default()
        .manage(MicThreshold(threshold.clone()))
        .manage(AudioLevel(level.clone()))
        .manage(BlinkInterval(blink_interval.clone()))
        .manage(CurrentConfig(current_conf.clone()))
        .manage(RayToLoad(ray.clone()))
        .manage(MicSense(sens.clone()))
        // .on_window_event(move |event| match event.event() {
        //     WindowEvent::CloseRequested { .. } => {
        //         debug!("close requested");
        //         if let Err(e) = config::save_config(&*c2.lock().unwrap()) {
        //             error!("Error writing config file: {}", e);
        //         }
        //     }
        //     _ => {}
        // })
        .setup(move |app| {
            let window = app.get_window("main").unwrap();
            tauri::async_runtime::spawn(async move {
                monitor(window, threshold, level, sens).await;
            });

            let window = app.get_window("main").unwrap();
            tauri::async_runtime::spawn(async move {
                loop {
                    if rand::random() {
                        trace!("Blinking");
                        if let Some(e) = window.emit_all("blink", "").err() {
                            warn!("Failed to emit blink event: {}", e);
                        }
                    }
                    let blink = blink_interval.lock().unwrap();
                    sleep(Duration::from_millis(*blink));
                }
            });

            let window = app.get_window("main").unwrap();
            tauri::async_runtime::spawn(async move {
                use notify::{event::AccessKind, Event, EventKind, RecursiveMode, Result, Watcher};
                if let Some(path) = config_dir() {
                    let mut watcher =
                        notify::recommended_watcher(move |res: Result<Event>| match res {
                            Ok(event) => {
                                if let EventKind::Access(AccessKind::Close(_)) = event.kind {
                                    *config.lock().unwrap() = config::load_config();
                                    window.emit_all("reload-config", "").unwrap();
                                }
                            }
                            Err(e) => error!("error watching filesystem {:?}", e),
                        })
                        .unwrap();
                    watcher
                        .watch(
                            &path.join("cathode").join("config.toml"),
                            RecursiveMode::NonRecursive,
                        )
                        .unwrap();
                    loop {
                        sleep(Duration::from_millis(5000));
                    }
                }
            });

            match app.get_cli_matches() {
                Ok(matches) => {
                    trace!("matches OK");
                    if let Some(arg) = matches.args.get("file") {
                        trace!("CLI arg value: {:?}", arg);
                        if let Value::String(path) = arg.value.clone() {
                            *ray.lock().unwrap() = Some(PathBuf::from(path));
                        }
                    }
                }
                Err(e) => eprintln!("{}", e),
            }

            Ok(())
        })
        .invoke_handler(tauri::generate_handler![
            log,
            set_mic_threshold,
            get_mic_threshold,
            set_mic_sens,
            get_mic_sens,
            get_audio_level,
            get_blink_interval,
            set_blink_interval,
            get_config,
            set_config,
            save_current_config,
            get_ray_to_load,
            fs::open_image,
            fs::save_ray,
            fs::open_ray,
            audio::get_devices,
        ])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

#[tauri::command]
fn get_ray_to_load(ray: State<'_, RayToLoad>) -> Option<WebRay> {
    let ray = { (*ray.0.lock().unwrap()).clone() };
    if let Some(r) = ray {
        let ray = fs::load_ray(r);
        ray
    } else {
        None
    }
}

#[tauri::command]
fn log(msg: String) {
    debug!("frontend: {}", msg);
}

#[tauri::command]
fn set_mic_threshold(threshold: f32, current: State<'_, MicThreshold>) {
    *current.0.lock().unwrap() = threshold;
}

#[tauri::command]
fn get_mic_threshold(current: State<'_, MicThreshold>) -> f32 {
    *current.0.lock().unwrap()
}

#[tauri::command]
fn set_mic_sens(sens: f32, current: State<'_, MicSense>) {
    *current.0.lock().unwrap() = sens;
}

#[tauri::command]
fn get_mic_sens(current: State<'_, MicSense>) -> f32 {
    *current.0.lock().unwrap()
}

#[tauri::command]
fn get_audio_level(level: State<'_, AudioLevel>) -> f32 {
    *level.0.lock().unwrap()
}

#[tauri::command]
fn get_blink_interval(current: State<'_, BlinkInterval>) -> u64 {
    *current.0.lock().unwrap()
}

#[tauri::command]
fn set_blink_interval(value: u64, current: State<'_, BlinkInterval>) {
    *current.0.lock().unwrap() = value;
}

#[tauri::command]
fn get_config(current: State<'_, CurrentConfig>) -> Config {
    current.0.lock().unwrap().clone()
}

#[tauri::command]
fn set_config(config: Config, current: State<'_, CurrentConfig>) {
    *current.0.lock().unwrap() = config
}

#[tauri::command]
fn save_current_config(current: State<'_, CurrentConfig>) -> Result<(), String> {
    config::save_config(&*current.0.lock().unwrap()).map_err(|e| format!("{}", e))
}