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use freya_engine::prelude::{Canvas, FontCollection};
use winit::window::Window;

#[derive(Default)]
pub struct PluginsManager {
    plugins: Vec<Box<dyn FreyaPlugin>>,
}

impl PluginsManager {
    pub fn add_plugin(&mut self, plugin: impl FreyaPlugin + 'static) {
        self.plugins.push(Box::new(plugin))
    }

    pub fn send(&mut self, event: PluginEvent) {
        for plugin in &mut self.plugins {
            plugin.on_event(&event)
        }
    }
}

/// Event emitted to Plugins.
pub enum PluginEvent<'a> {
    /// The Window just got created.
    WindowCreated(&'a Window),

    // The app just got rendered to the canvas.
    CanvasRendered(&'a Canvas, &'a FontCollection),
}

/// Skeleton for Freya plugins.
pub trait FreyaPlugin {
    /// React on events emitted by Freya.
    fn on_event(&mut self, event: &PluginEvent);
}