use pile_config::Label;
use smartstring::{LazyCompact, SmartString};
use std::{collections::HashMap, sync::Arc};

use crate::{source::DirDataSource, value::PileValue};

//
// MARK: item
//

/// A cheaply-cloneable pointer to an item in a dataset
#[derive(Clone)]
pub enum Item {
	File {
		key: SmartString<LazyCompact>,
		source: Arc<DirDataSource>,
		files: HashMap<Label, PileValue>,
	},
}

impl std::fmt::Debug for Item {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
		match self {
			Self::File { key, files, .. } => f
				.debug_struct("Item::File")
				.field("key", key)
				.field("files", &files.keys().collect::<Vec<_>>())
				.finish(),
		}
	}
}

impl Item {
	pub fn source_name(&self) -> &pile_config::Label {
		match self {
			Self::File { source, .. } => &source.name,
		}
	}

	pub fn key(&self) -> SmartString<LazyCompact> {
		match self {
			Self::File { key, .. } => key.clone(),
		}
	}
}