use gtk::{glib, prelude::*, Box, Entry, Label, ListBox};
use gtk::{Application, ApplicationWindow, Button};
use serde::{Deserialize, Serialize};
use std::sync::{Arc, atomic::AtomicBool};
use log::error;

use crate::config::load_config;
use crate::{joystick_loop, JoystickThreadUpdate};

pub struct SocketConnectionUpdate {
    pub ip: String,
    pub port: u32,
    pub start_websocket: bool,
}

#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct AppState {
    pub ip: String,
    pub port: u32,
}

impl Default for AppState {
    fn default() -> Self {
        AppState {
            ip: "10.0.0.29".to_string(),
            port: 8765,
        }
    }
}

pub fn build_ui(app: &Application) {
    let initial_settings = load_config();
    let main_box = ListBox::new();

    let do_run: Arc<AtomicBool> = Arc::new(AtomicBool::new(true));
    let do_run2 = do_run.clone();
    let (tx, rx) = async_channel::bounded::<JoystickThreadUpdate>(4);

    let (tx2, rx2) = async_channel::bounded::<SocketConnectionUpdate>(1);

    let _ = std::thread::spawn(move || joystick_loop::joystick_websocket_loop(tx, do_run2, rx2));

    // let conn_status_label = Label::new(Some(&"No Connection".to_string()));
    let conn_status_label = Label::builder()
        .label("No Connection".to_string())
        .can_focus(true)
        .build();

    let content_box = Box::builder()
        .orientation(gtk::Orientation::Vertical)
        .spacing(10)
        .margin_top(12)
        .margin_start(24)
        .margin_end(24)
        .margin_bottom(12)
        .build();

    let ip_entry = Entry::builder()
        .placeholder_text("IP Address")
        .text(initial_settings.ip)
        .can_focus(true)
        .build();
    let port_entry = Entry::builder()
        .placeholder_text("Port")
        .text(initial_settings.port.to_string())
        .can_focus(true)
        .build();
    let button = Button::builder().margin_top(12).build();

    content_box.append(&ip_entry);
    content_box.append(&port_entry);
    content_box.append(&button);

    let axis_label = Label::builder()
        .label("X:   0    Y:   )")
        .justify(gtk::Justification::Center)
        .css_classes(vec!["JoystickCurrent"])
        .build();

    main_box.append(&conn_status_label);
    main_box.append(&content_box);
    main_box.append(&axis_label);

    // Connect to "clicked" signal of `button`
    button.connect_clicked(glib::clone!(@weak ip_entry, @weak port_entry, @strong tx2 => move |_button| {
        // Set the label to "Hello World!" after the button has been clicked on

        let ip_text = ip_entry.text();
        let port_text = port_entry.text();

        if ip_text.len() > 0 {
            if let Ok(val) = port_text.parse::<u32>() {
                match tx2.try_send(SocketConnectionUpdate {
                    ip: ip_text.to_string(),
                    port: val,
                    start_websocket: ip_entry.get_sensitive(),
                }) {
                    Ok(_) => { }
                    Err(async_channel::TrySendError::Closed(_)) => {panic!("Joystick thread was closed. Unrecoverable")}
                    Err(e) => {error!("There was an error: {e}")}
                }
            }
        }
    }));

    glib::spawn_future_local(
        glib::clone!(@weak axis_label, @weak button, @weak conn_status_label, @weak ip_entry, @weak port_entry, @strong rx => async move {
            while let Ok(msg) =  rx.recv().await {
                axis_label.set_text(
                    format!("X: {:>4}   Y: {:>4}", msg.x_axis.unwrap_or("0".to_string()), msg.y_axis.unwrap_or("0".to_string())).as_str()
                );
                button.set_label({
                    if msg.connected {
                        ip_entry.set_sensitive(false);
                        port_entry.set_sensitive(false);
                        "Currently Connected"
                    } else {
                        ip_entry.set_sensitive(true);
                        port_entry.set_sensitive(true);
                        "Currently Disconnected"
                    }
                });
                if msg.connected {
                    conn_status_label.set_css_classes(&["YesConnection"]);
                    button.set_css_classes(&["YesConnection"]);
                } else {
                    conn_status_label.set_css_classes(&["NoConnection"]);
                    button.set_css_classes(&["NoConnection"]);
                }
            }
        }),
    );

    // Create a window
    let window = ApplicationWindow::builder()
        .application(app)
        .title("VCC Camera Controller")
        .child(&main_box)
        .build();

    window.connect_close_request(move |_| {
        do_run.store(false, std::sync::atomic::Ordering::SeqCst);
        glib::Propagation::Proceed
    });

    // Present window
    window.present();
}