use crate::firmware::firmware_state::{AppCrashesStep, FirmwareState};
use crate::firmware::prometeu_context::PrometeuContext;
use prometeu_core::abi::log::{LogLevel, LogSource};

#[derive(Debug, Clone)]
pub struct HubHomeStep;

impl HubHomeStep {
    pub fn on_enter(&mut self, ctx: &mut PrometeuContext) {
        ctx.os.log(LogLevel::Info, LogSource::Hub, 0, "Entering HubHome".to_string());
    }

    pub fn on_update(&mut self, ctx: &mut PrometeuContext) -> Option<FirmwareState> {
        let mut error = None;

        // Always updates the Hub GUI (clears screen and processes input if no focus)
        ctx.hub.gui_update(ctx.os, ctx.hw);

        if let Some(focused_id) = ctx.hub.window_manager.focused {
            if ctx.hw.pad().start().down {
                ctx.hub.window_manager.remove_window(focused_id);
            } else {
                // System App runs here, drawing over the Hub background
                error = ctx.os.tick(ctx.vm, ctx.signals, ctx.hw);
            }
        }

        // Renders the System App window borders
        ctx.hub.render(ctx.os, ctx.hw);
        
        ctx.hw.gfx_mut().present();
        
        if let Some(err) = error {
            return Some(FirmwareState::AppCrashes(AppCrashesStep { error: err }));
        }
        
        None
    }

    pub fn on_exit(&mut self, _ctx: &mut PrometeuContext) {}
}