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use collection::{Collection, MutableCollection, Sliceable};
use card::{StandardCard};
use deck::deck_creator;

use std::cmp::PartialEq;

///A Deck that wont contain duplicate cards
#[derive(Debug)]
pub struct NoDuplicatesDeck<T: PartialEq> {
    _cards: Vec<T>
}

impl<T> NoDuplicatesDeck<T>
	where T: PartialEq
{
	pub fn new() -> NoDuplicatesDeck<T>
	{
		NoDuplicatesDeck{_cards:Vec::new()}
	}

	pub fn new_standard_deck() -> NoDuplicatesDeck<StandardCard>
	{
		NoDuplicatesDeck{_cards: deck_creator::create_standard_deck()}
	}
	
	fn contains(&self, item: &T) -> bool
	{
		self._cards.contains(item)
	}
}

impl<T> Collection for NoDuplicatesDeck<T>
	where T: PartialEq
{
	type Item=T;
	fn size(&self) -> usize
	{
		self._cards.len()
	}
}

impl<T> MutableCollection for NoDuplicatesDeck<T>
	where T: PartialEq
{
	fn push(&mut self, item: Self::Item) -> ()
	{
		if !self.contains(&item)
			{self._cards.push(item)}
	}

	fn pop(&mut self) -> Option<Self::Item>
	{
		self._cards.pop()
	}

	fn insert_at(&mut self, index: usize, item: Self::Item) -> ()
	{
		if !self.contains(&item)
			{self._cards.insert(index, item)}
	}

	fn remove_at(&mut self, index:usize) -> Option<Self::Item>
	{
		self._cards.remove_at(index)
	}
}

impl<T> Sliceable for NoDuplicatesDeck<T>
	where T: PartialEq
{
	type Item = T;
	fn as_mut_slice(&mut self) -> &mut [T]
	{
		self._cards.as_mut_slice()
	}
}

#[cfg(test)]
mod non_duplicate_tests
{
	use super::NoDuplicatesDeck;

	use deck::{Deck};

	#[test]
	fn cannot_add_duplicates() -> ()
	{
		let item = 1;
		let mut deck = NoDuplicatesDeck::new();
		deck.add_card_to_bottom(item); 
		assert_eq!(deck.size(), 1);
		deck.add_card_to_bottom(item);
		assert_eq!(deck.size(), 1);
	}
}