use bevy::prelude::*;

use crate::{game::wall::WallTiles, tiles::Tile};

#[derive(Component)]
pub struct Hand;

#[derive(Component)]
#[relationship(relationship_target = HandTiles)]
pub struct InHand(pub Entity);

#[derive(Component)]
#[relationship_target(relationship = InHand, linked_spawn)]
pub struct HandTiles(Vec<Entity>);

pub(crate) fn deal_hands(
    mut commands: Commands,
    walltiles: Single<&WallTiles>,
    walltiles_entity: Single<Entity, With<WallTiles>>,
) -> Result {
    let hand = walltiles.iter().collect::<Vec<_>>();

    commands
        .get_entity(*walltiles_entity)?
        .remove_children(hand.last_chunk::<13>().unwrap());

    commands.spawn((Hand, HandTiles(hand)));

    trace!("dealt hands");
    Ok(())
}

#[allow(clippy::type_complexity)]
pub fn sort_hands(
    mut commands: Commands,
    tiles: Populated<&Tile>,
    handtiles_entity: Single<Entity, With<HandTiles>>,
    handtiles: Single<&HandTiles, Changed<HandTiles>>,
) -> Result {
    let mut hand: Vec<_> = handtiles
        .iter()
        .map(|e| -> Result<(_, _)> { Ok((tiles.get(e)?, e)) })
        .collect::<Result<_>>()?;

    hand.sort_by_key(|(t, _)| t.suit);

    let hand: Vec<_> = hand.iter().map(|(_, e)| *e).collect();

    commands
        .get_entity(*handtiles_entity)?
        .replace_children(&hand);

    trace!("sort_hand");
    Ok(())
}