use bevy::prelude::*;
use bevy_sprite_animation::prelude::*;

/// this is an exaple of how to make a single animation in code and add it to you game
fn main() {
    App::new()
        .add_plugins(DefaultPlugins.set(ImagePlugin {
            default_sampler: bevy::render::texture::ImageSampler::nearest_descriptor(),
        }))
        // add the plugin to our game, the 10 is the max number of nodes in a single chain
        // this provents the app getting stuck in a loop
        .add_plugins(SpriteAnimationPlugin::<10>)
        .add_systems(Startup, setup_animations)
        .run()
}

fn setup_animations(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut nodes: ResMut<Assets<AnimationNode>>,
) {
    commands.spawn(Camera2dBundle::default());

    // Load all the images
    let images = asset_server
        .load_folder("Zombie1")
        .unwrap()
        .into_iter()
        .map(|h| h.typed())
        .collect::<Vec<_>>();

    // Add a new IndexNode
    let index = nodes.add(AnimationNode::new(
        bevy_sprite_animation::nodes::IndexNode::new(
            // this node will be called test
            "test", // this is the frames in oreder that it will use
            &images, // we want it to loop after it gets to the end
            true,
        ),
    ));
    // Add a node with a auto generated id
    let fps_start = nodes.add(AnimationNode::new(
        bevy_sprite_animation::nodes::FPSNode::new(
            // this node is call fps
            "fps",
            // it will change frames 7 times a seconed
            7,
            // it will go to the IndexNode we just inserted
            NodeId::Handle(index),
        ),
    ));

    // spawn SpriteBundle
    commands.spawn((
        SpriteBundle {
            transform: Transform::from_translation(Vec3::X * 10.),
            sprite: Sprite {
                custom_size: Some(Vec2::splat(1000.)),
                ..Default::default()
            },
            ..Default::default()
        },
        // add AnimationState
        AnimationState::default(),
        // add a startnode to our entity with the fps node as its first node
        StartNode::from_handle(fps_start),
    ));
}