mod polygon_draw;

use iced::{
    Settings, Task, Theme,
    time::{self, Duration},
    widget::{button, canvas, column, row, text},
};
use polygon_draw::{Polygon, PolygonFrame};

use std::f32::consts::PI;
use std::time::Instant;

fn main() -> iced::Result {
    iced::application("My App", MyApp::update, MyApp::view)
        .theme(|_| Theme::Dark)
        .subscription(MyApp::subscription)
        .run_with(MyApp::new)
}

#[derive(Debug, Clone)]
enum Message {
    ButtonPressedIncrement,
    ButtonPressedDecrement,
    Tick,
}

struct MyApp {
    polys: PolygonFrame,
    time_last_frame: Instant,
    nb_sec_for_rev: u32,
}

impl MyApp {
    fn new() -> (Self, Task<Message>) {
        (
            Self {
                nb_sec_for_rev: 4,
                time_last_frame: Instant::now(),
                polys: PolygonFrame {
                    teta: 0.0,
                    polygons: vec![
                        //Polygon::n_gon(0.0, 12),
                        Polygon::nr_10a_in_42(0.0),
                        Polygon::nr_10b_in_42(0.0),
                    ],
                },
            },
            Task::none(),
        )
    }
    fn update(&mut self, message: Message) {
        match message {
            Message::ButtonPressedIncrement => self.nb_sec_for_rev += 1,
            Message::ButtonPressedDecrement => {
                if self.nb_sec_for_rev > 1 {
                    self.nb_sec_for_rev -= 1
                }
            }
            Message::Tick => {
                let time_btw = Instant::now().duration_since(self.time_last_frame);
                self.polys.teta += 2.0
                    * PI
                    * (1.0 / self.nb_sec_for_rev as f32)
                    * (time_btw.as_millis() as f32 / 1_000.0);
                self.polys.teta %= 2.0 * PI;
                //println!("Teta : {}", self.polys.teta);
                self.time_last_frame = Instant::now();
            }
        }
    }

    fn view(&self) -> iced::Element<Message> {
        let txt_nb_rev = format!("Revolution per second : {}", self.nb_sec_for_rev);
        column![
            text("Polymusic").size(32.0),
            row![
                canvas(&self.polys).height(500).width(500),
                column![
                    text(txt_nb_rev),
                    row![
                        button("Increment").on_press(Message::ButtonPressedIncrement),
                        button("Decrement").on_press(Message::ButtonPressedDecrement),
                    ],
                ],
            ]
        ]
        .into()
    }
    fn subscription(&self) -> iced::Subscription<Message> {
        time::every(Duration::from_millis(1)).map(|_| Message::Tick)
    }
}