use crate::VirtualMachineRuntime;
use crate::programs::prometeu_hub::window_manager::WindowManager;
use prometeu_hal::HardwareBridge;
use prometeu_hal::color::Color;
use prometeu_hal::log::{LogLevel, LogSource};
use prometeu_hal::window::Rect;

/// PrometeuHub: Launcher and system UI environment.
pub struct PrometeuHub {
    pub window_manager: WindowManager,
}

impl PrometeuHub {
    pub fn new() -> Self {
        Self { window_manager: WindowManager::new() }
    }

    pub fn init(&mut self) {
        // Initializes the Window System and lists apps
    }

    pub fn gui_update(&mut self, os: &mut VirtualMachineRuntime, hw: &mut dyn HardwareBridge) {
        hw.gfx_mut().clear(Color::BLACK);

        let mut next_window = None;

        if hw.pad().a().pressed {
            os.log(LogLevel::Debug, LogSource::Hub, 0, "window A opened".to_string());
            next_window = Some((
                "Green Window".to_string(),
                Rect { x: 0, y: 0, w: 160, h: 90 },
                Color::GREEN,
            ));
        } else if hw.pad().b().pressed {
            os.log(LogLevel::Debug, LogSource::Hub, 0, "window B opened".to_string());
            next_window = Some((
                "Indigo Window".to_string(),
                Rect { x: 160, y: 0, w: 160, h: 90 },
                Color::INDIGO,
            ));
        } else if hw.pad().x().pressed {
            os.log(LogLevel::Debug, LogSource::Hub, 0, "window X opened".to_string());
            next_window = Some((
                "Yellow Window".to_string(),
                Rect { x: 0, y: 90, w: 160, h: 90 },
                Color::YELLOW,
            ));
        } else if hw.pad().y().pressed {
            os.log(LogLevel::Debug, LogSource::Hub, 0, "window Y opened".to_string());
            next_window =
                Some(("Red Window".to_string(), Rect { x: 160, y: 90, w: 160, h: 90 }, Color::RED));
        }

        if let Some((title, rect, color)) = next_window {
            self.window_manager.remove_all_windows();
            let id = self.window_manager.add_window(title, rect, color);
            self.window_manager.set_focus(id);
        }
    }

    pub fn render(&mut self, _os: &mut VirtualMachineRuntime, hw: &mut dyn HardwareBridge) {
        for window in &self.window_manager.windows {
            hw.gfx_mut().fill_rect(
                window.viewport.x,
                window.viewport.y,
                window.viewport.w,
                window.viewport.h,
                window.color,
            );
        }
    }
}