use std::rc::Rc;

use evdev::KeyCode;
use linfb::shape::Color;
use slint::platform::software_renderer::{MinimalSoftwareWindow, RepaintBufferType, Rgb565Pixel};
use slint::platform::{Platform, WindowEvent};
use slint::{LogicalPosition, PhysicalSize, Rgb8Pixel, WindowSize};

use self::input::InputState;
use self::screen::Screen;

mod input;
mod screen;

pub struct Context {
    pub screen: Screen,
    pub input: InputState,
}

pub struct Trekstor {
    window: Rc<MinimalSoftwareWindow>,
}

impl Trekstor {
    pub fn new() -> Self {
        let window = MinimalSoftwareWindow::new(RepaintBufferType::NewBuffer);

        Self { window }
    }
}

impl Platform for Trekstor {
    fn create_window_adapter(
        &self,
    ) -> Result<Rc<dyn slint::platform::WindowAdapter>, slint::PlatformError> {
        Ok(self.window.clone())
    }

    fn run_event_loop(&self) -> Result<(), slint::PlatformError> {
        let screen = Screen::new();
        let input = InputState::new(&screen);
        let mut ctx = Context { screen, input };

        let mut buffer1 = [Rgb565Pixel(0); 614400];

        let window_width = ctx.screen.width();
        let window_height = ctx.screen.height();

        self.window.set_size(WindowSize::Physical(PhysicalSize::new(
            window_width,
            window_height,
        )));

        loop {
            ctx.input.handle_event();

            slint::platform::update_timers_and_animations();

            if ctx.input.is_just_pressed(KeyCode::BTN_TOUCH) {
                self.window
                    .try_dispatch_event(WindowEvent::PointerPressed {
                        position: LogicalPosition::new(ctx.input.x as f32, ctx.input.y as f32),
                        button: slint::platform::PointerEventButton::Left,
                    })
                    .unwrap();
            }

            if ctx.input.is_just_released(KeyCode::BTN_TOUCH) {
                self.window
                    .try_dispatch_event(WindowEvent::PointerReleased {
                        position: LogicalPosition::new(ctx.input.x as f32, ctx.input.y as f32),
                        button: slint::platform::PointerEventButton::Left,
                    })
                    .unwrap();
            }

            if ctx.input.is_down(KeyCode::BTN_TOUCH) {
                self.window
                    .try_dispatch_event(WindowEvent::PointerMoved {
                        position: LogicalPosition::new(ctx.input.x as f32, ctx.input.y as f32),
                    })
                    .unwrap();
            }

            self.window.draw_if_needed(|renderer| {
                renderer.render(&mut buffer1, window_width as usize);

                for (i, px) in buffer1.into_iter().enumerate() {
                    let x = (i % window_width as usize) as u32;
                    let y = (i / window_width as usize) as u32;

                    let pixel = Rgb8Pixel::from(px);
                    let c = Color::from((pixel.r, pixel.g, pixel.b, 255));

                    ctx.screen.framebuffer.set_pixel(x, y, c);
                }
                ctx.screen.flush();
            });

            ctx.input.finish();
        }
    }
}