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mod app;
mod app_builder;
mod event;
mod plugin;
mod plugin_group;
mod schedule_runner;

pub use app::*;
pub use app_builder::*;
pub use bevy_derive::DynamicPlugin;
pub use event::*;
pub use plugin::*;
pub use plugin_group::*;
pub use schedule_runner::*;

pub mod prelude {
    pub use crate::{
        app::App,
        app_builder::AppBuilder,
        event::{EventReader, EventWriter},
        CoreStage, DynamicPlugin, Plugin, PluginGroup, StartupStage,
    };
}

use bevy_ecs::schedule::StageLabel;

/// The names of the default App stages
#[derive(Debug, Hash, PartialEq, Eq, Clone, StageLabel)]
pub enum CoreStage {
    /// Runs once at the beginning of the app.
    Startup,
    /// Name of app stage that runs before all other app stages
    First,
    /// Name of app stage responsible for performing setup before an update. Runs before UPDATE.
    PreUpdate,
    /// Name of app stage responsible for doing most app logic. Systems should be registered here
    /// by default.
    Update,
    /// Name of app stage responsible for processing the results of UPDATE. Runs after UPDATE.
    PostUpdate,
    /// Name of app stage that runs after all other app stages
    Last,
}
/// The names of the default App startup stages
#[derive(Debug, Hash, PartialEq, Eq, Clone, StageLabel)]
pub enum StartupStage {
    /// Name of app stage that runs once before the startup stage
    PreStartup,
    /// Name of app stage that runs once when an app starts up
    Startup,
    /// Name of app stage that runs once after the startup stage
    PostStartup,
}