/******************************************************************************/
/* ARRAYS *********************************************************************/
/******************************************************************************/

#ifndef _H_EBCL_ARRAYS
#define _H_EBCL_ARRAYS
#include <ebcl/Externals.hh>
#include <ebcl/Pointers.hh>
#include <ebcl/Utilities.hh>
#include <ebcl/Types.hh>
namespace ebcl {


// TODO:
//	* add addAll({})
//	* add ={} / cons({})


/*= DYNAMIC ARRAYS ===========================================================*/

template< class T >
class T_Array final
{
   public:
	static constexpr uint32_t DEFAULT_GROWTH( )
	{
		return std::max< uint32_t >( 1 , 4096 / sizeof( T ) );
	}

	template< ptrdiff_t Direction >
	class T_Iterator_ final : public std::iterator<
				std::random_access_iterator_tag , T >
	{
	    private:
		T_Array< T >* array_;
		ptrdiff_t pos_;

	    public:
		T_Iterator_( T_Array< T >& array ,
				const ptrdiff_t pos ) noexcept;

		M_ITER_CONS_DEF( T_Iterator_ );
		M_ITER_CONS_COPY( T_Iterator_ );
		M_ITER_SWAP( T_Iterator_ , T_Array );
		M_ITER_CMP_ALL( T_Iterator_ );
		M_ITER_DEREF_RANDOM( T& , T* );
		M_ITER_OPS_RANDOM( T_Iterator_ );

		bool valid( ) const noexcept;
		T_Array< T >* target( ) const noexcept;
		ptrdiff_t pos( ) const noexcept;
	};
	using T_Iterator = T_Iterator_< 1 >;
	using T_ReverseIterator = T_Iterator_< -1 >;

	template< ptrdiff_t Direction >
	class T_ConstIterator_ : public std::iterator<
				std::random_access_iterator_tag , T >
	{
	    private:
		T_Array< T > const* array_;
		ptrdiff_t pos_;

	    public:
		T_ConstIterator_( T_Array< T > const& array ,
				const ptrdiff_t pos ) noexcept;

		T_ConstIterator_( typename T_Array< T >::T_Iterator const& iterator ) noexcept;
		T_ConstIterator_& operator =(
				typename T_Array< T >::T_Iterator const& iterator ) noexcept;

		M_ITER_CONS_DEF( T_ConstIterator_ );
		M_ITER_CONS_COPY( T_ConstIterator_ );
		M_ITER_SWAP( T_ConstIterator_ , T_Array );
		M_ITER_CMP_ALL( T_ConstIterator_ );
		M_ITER_DEREF_RANDOM( T const& , T const* );
		M_ITER_OPS_RANDOM( T_ConstIterator_ );

		bool valid( ) const noexcept;
		T_Array< T >* target( ) const noexcept;
		ptrdiff_t pos( ) const noexcept;
	};
	using T_ConstIterator = T_ConstIterator_< 1 >;
	using T_ConstReverseIterator = T_ConstIterator_< -1 >;

   private:
	typedef T_Array< T > MyType_;

	T* data_;
	uint32_t capacity_;
	uint32_t size_;
	uint32_t growth_;

   public:
	M_TEMPLATE_POINTERS( MyType_ );

	T_Array( ) noexcept;
	explicit T_Array( uint32_t growth ) noexcept;

	// ---------------------------------------------------------------------

	T_Array( MyType_ const& source ) noexcept;
	MyType_& operator= ( MyType_ const& other ) noexcept;

	T_Array( MyType_&& source ) noexcept;
	MyType_& operator= ( MyType_&& other ) noexcept;

	T_Array( std::initializer_list< T > list ) noexcept;
	MyType_& operator= ( std::initializer_list< T > list ) noexcept;

	template< typename TP >
		friend void swap( T_Array< TP >& lhs ,
				T_Array< TP >& rhs ) noexcept;

	// ---------------------------------------------------------------------

	~T_Array( );

	MyType_& clear( ) noexcept;
	MyType_& free( ) noexcept;

	// ---------------------------------------------------------------------

	uint32_t capacity( ) const noexcept;
	uint32_t size( ) const noexcept;
	uint32_t growth( ) const noexcept;
	bool empty( ) const noexcept;

	MyType_& ensureCapacity( uint32_t capacity ) noexcept;

	template<
		typename Q = T ,
		typename = std::enable_if_t< std::is_default_constructible< Q >::value >
	> MyType_& resize( const uint32_t size );

	template<
		typename Q = T ,
		typename = std::enable_if_t< std::is_copy_constructible< Q >::value >
	> MyType_& resize( const uint32_t size ,
			T const& value );

	// ---------------------------------------------------------------------

	T& operator[] ( uint32_t index ) noexcept;
	T const& operator[] ( uint32_t index ) const noexcept;

	T& last( ) noexcept;
	T const& last( ) const noexcept;

	int32_t indexOf( T const& item ) const noexcept;
	bool contains( T const& item ) const noexcept;

	// ---------------------------------------------------------------------

	uint32_t add( T const& item ) noexcept;
	uint32_t add( T&& item ) noexcept;

	template< typename... Args >
		T& addNew( Args&& ... args );

	// ---------------------------------------------------------------------

	MyType_& addAll( MyType_ const& other ) noexcept;
	MyType_& addAll( MyType_&& other ) noexcept;
	MyType_& addAll( std::initializer_list< T > values ) noexcept;

	// ---------------------------------------------------------------------

	MyType_& operator<< ( T const& item ) noexcept;
	MyType_& operator<< ( T&& item ) noexcept;
	MyType_& operator<< ( MyType_ const& other ) noexcept;
	MyType_& operator<< ( MyType_&& other ) noexcept;

	// ---------------------------------------------------------------------

	void insert( uint32_t index ,
			T const& item ) noexcept;
	void insert( uint32_t index ,
			T&& item ) noexcept;

	template< typename... Args >
		T& insertNew( uint32_t index ,
				Args&& ... args );

	// ---------------------------------------------------------------------

	void remove( uint32_t index ) noexcept;
	void removeSwap( uint32_t index ) noexcept;
	void removeLast( ) noexcept;

	// ---------------------------------------------------------------------

	void sort( F_Comparator< T > cmp = T_Comparator< T >::compare ) noexcept;
	void sort( uint32_t first ,
			uint32_t items ,
			F_Comparator< T > cmp = T_Comparator< T >::compare ) noexcept;

	// ---------------------------------------------------------------------

	MyType_ copyRange( uint32_t first ,
			uint32_t last = UINT32_MAX ) const noexcept;

	MyType_ moveRange( uint32_t first ,
			uint32_t last = UINT32_MAX ) noexcept;

	// ---------------------------------------------------------------------
	// Iterators for C++ for loops

	T_ConstIterator begin( ) const noexcept;
	T_ConstIterator end( ) const noexcept;

	T_ConstReverseIterator rbegin( ) const noexcept;
	T_ConstReverseIterator rend( ) const noexcept;

	T_ConstIterator cbegin( ) const noexcept;
	T_ConstIterator cend( ) const noexcept;

	T_ConstReverseIterator crbegin( ) const noexcept;
	T_ConstReverseIterator crend( ) const noexcept;

	T_Iterator begin( ) noexcept;
	T_Iterator end( ) noexcept;

	T_ReverseIterator rbegin( ) noexcept;
	T_ReverseIterator rend( ) noexcept;
};

// Instantiate some common types directly
extern template class T_Array< uint32_t >;


/*= STATICALLY ALLOCATED ARRAYS ==============================================*/
/* These arrays offer the same interface as dynamic arrays, but are in fact
 * implemented as in-place storage.
 */

template< typename Type , uint32_t Size >
class T_StaticArray final
{
	static_assert( Size > 0 , "Size must be greater than 0" );

    public:
	using T_Self = T_StaticArray< Type , Size >;

    private:
	// Actual storage type
	using T_Storage_ = std::aligned_storage_t<
		sizeof( Type ) , alignof( Type )
	>;

	T_Storage_ storage_[ Size ];
	uint32_t size_;

   public:
	M_TEMPLATE_POINTERS( T_Self );

	T_StaticArray( ) noexcept;

	// Copy
	T_StaticArray( T_Self const& source ) noexcept;
	T_Self& operator= ( T_Self const& other ) noexcept;

	// Move
	T_StaticArray( T_Self&& source ) noexcept;
	T_Self& operator= ( T_Self&& other ) noexcept;

	~T_StaticArray( ) noexcept;
	T_Self& clear( ) noexcept;

	template< typename T , uint32_t S >
	friend void swap(
			T_StaticArray< T , S >& lhs ,
			T_StaticArray< T , S >& rhs ) noexcept;

	// ---------------------------------------------------------------------

	constexpr uint32_t capacity( ) const noexcept;
	uint32_t size( ) const noexcept;
	bool empty( ) const noexcept;

	// ---------------------------------------------------------------------

	Type& operator[] ( uint32_t index ) noexcept;
	Type const& operator[] ( uint32_t index ) const noexcept;

	Type& last( ) noexcept;
	Type const& last( ) const noexcept;

	int32_t indexOf( Type const& item ) const noexcept;
	bool contains( Type const& item ) const noexcept;

	// ---------------------------------------------------------------------

	uint32_t add( Type&& item ) noexcept;
	uint32_t add( Type const& item ) noexcept;
	template< typename... Args >
		Type& addNew( Args&& ... args );

	// ---------------------------------------------------------------------

	T_Self& addAll( T_Self const& other ) noexcept;
	T_Self& addAll( T_Self&& other ) noexcept;

	// ---------------------------------------------------------------------

	T_Self& operator<< ( Type const& item ) noexcept;
	T_Self& operator<< ( Type&& item ) noexcept;
	T_Self& operator<< ( T_Self const& other ) noexcept;
	T_Self& operator<< ( T_Self&& other ) noexcept;

	// ---------------------------------------------------------------------

	void insert( uint32_t index ,
			Type&& item ) noexcept;
	void insert( uint32_t index ,
			Type const& item ) noexcept;
	template< typename... Args >
		Type& insertNew( uint32_t index ,
				Args&& ... args );

	// ---------------------------------------------------------------------

	void remove( uint32_t index ) noexcept;
	void removeSwap( uint32_t index ) noexcept;
	void removeLast( ) noexcept;

	// ---------------------------------------------------------------------

	void sort( F_Comparator< Type > cmp = T_Comparator< Type >::compare ) noexcept;
	void sort( uint32_t first ,
			uint32_t items ,
			F_Comparator< Type > cmp = T_Comparator< Type >::compare ) noexcept;

	// ---------------------------------------------------------------------

	T_Self copyRange( uint32_t first ,
			uint32_t last = UINT32_MAX ) const noexcept;
	T_Self moveRange( uint32_t first ,
			uint32_t last = UINT32_MAX ) noexcept;
};


/*= MULTI-ARRAYS ============================================================-*/
/*
 * Arrays that allow storing multiple values for one entry. Values must be
 * added in order.
 */

template< typename T >
class T_MultiArray
{
   public:
	using T_Data = T_Array< T >;

   private:
	typedef T_MultiArray< T > MyType_;

	T_Array< uint32_t > meta_;
	T_Data values_;

   public:
	M_TEMPLATE_POINTERS( T_MultiArray );

	template< typename TP >
	friend void swap( T_MultiArray< TP >& lhs , T_MultiArray< TP >& rhs );

	// Start the next entry
	void next( );
	// Add a value to the current entry
	void add( T value );
	// Add a value, calling its constructor
	template<
		typename Q = T ,
		typename... Args ,
		typename = std::enable_if_t< std::is_class< Q >::value >
		>
	Q& addNew( Args&& ... args );
	// Copy an array's contents into the current entry
	void copyFrom( T_Data const& source );

	// Returns the amount of entries
	uint32_t size( ) const noexcept;
	// Returns the index of the first value for an entry
	uint32_t firstOf( uint32_t item ) const noexcept;
	// Returns the amount of values for an entry
	uint32_t sizeOf( uint32_t item ) const noexcept;
	// Returns the amount of values across all entries
	uint32_t values( ) const noexcept;

	// Access a value in an entry
	T const& get( uint32_t item , uint32_t sub ) const;
	T& get( uint32_t item , uint32_t sub );

	// Access a value using its index
	T const& operator[] ( uint32_t index ) const;
	T& operator[] ( uint32_t index );

	// Is a value present in an entry?
	bool contains( uint32_t index , T const& value ) const;

	// Reset storage, don't free memory
	void clear( );
	// Reset storage and free memory
	void free( );

	// Copy values from an entry into the current entry
	void copyFrom( uint32_t index );
	// Copy another multi-array's entry into the current entry
	void copyFrom( MyType_ const& other , uint32_t index );

	// Copy values from another entry into the current entry if
	// they are not already present. Duplicate entries in the
	// source array are still copied, though.
	void copyUnique( uint32_t index );
	// Copy another multi-array's entry into the current entry,
	// ignoring values that are already present. Duplicates in
	// the source array are still copied.
	void copyUnique( MyType_ const& other , uint32_t index );

	// Sort an entry's values
	void sort( uint32_t index , F_Comparator< T > cmp = T_Comparator< T >::compare );
};


// Instantiate some common types directly
extern template class T_MultiArray< uint32_t >;


/*= AUTOMATIC ARRAYS =========================================================*/
/* Arrays that are stored in-place up to some limit, then transform into
 * dynamic arrays if necessary.
 */

template<
	typename T , uint32_t StaticSize ,
	uint32_t DynamicGrowth = StaticSize * 4
> class T_AutoArray
{
    public:
	using T_Self = T_AutoArray< T , StaticSize , DynamicGrowth >;

    private:
	using T_Static_ = T_StaticArray< T , StaticSize >;
	using T_Dynamic_ = T_Array< T >;

	T_Union< T_Static_ , T_Dynamic_ > array_;

	// ---------------------------------------------------------------------

    public:
	M_TEMPLATE_POINTERS( T_Self );

	T_AutoArray( ) noexcept;

	T_AutoArray( T_Self const& source ) noexcept;
	T_Self& operator =( T_Self const& source ) noexcept;

	T_AutoArray( T_Self&& source ) noexcept;
	T_Self& operator =( T_Self&& source ) noexcept;

	// ---------------------------------------------------------------------

	template< typename TP , uint32_t S , uint32_t G >
		friend void swap(
				T_AutoArray< TP , S , G >& lhs ,
				T_AutoArray< TP , S , G >& rhs ) noexcept;

	// ---------------------------------------------------------------------

	T_Self& clear( ) noexcept;
	T_Self& free( ) noexcept;

	// ---------------------------------------------------------------------

	uint32_t capacity( ) const noexcept;
	uint32_t size( ) const noexcept;
	constexpr uint32_t growth( ) const noexcept;
	bool isStatic( ) const noexcept;
	bool empty( ) const noexcept;

	T_Self& ensureCapacity( uint32_t capacity ) noexcept;

	// ---------------------------------------------------------------------

	T& operator[] ( uint32_t index ) noexcept;
	T const& operator[] ( uint32_t index ) const noexcept;

	T& last( ) noexcept;
	T const& last( ) const noexcept;

	int32_t indexOf( T const& item ) const noexcept;
	bool contains( T const& item ) const noexcept;

	// ---------------------------------------------------------------------

	uint32_t add( T const& item ) noexcept;
	uint32_t add( T&& item ) noexcept;

	template< typename... Args >
		T& addNew( Args&& ... args );

	// ---------------------------------------------------------------------

	T_Self& addAll( T_Self const& other ) noexcept;
	T_Self& addAll( T_Self&& other ) noexcept;

	// ---------------------------------------------------------------------

	T_Self& operator<< ( T const& item ) noexcept;
	T_Self& operator<< ( T&& item ) noexcept;
	T_Self& operator<< ( T_Self const& other ) noexcept;
	T_Self& operator<< ( T_Self&& other ) noexcept;

	// ---------------------------------------------------------------------

	void insert( uint32_t index ,
			T const& item ) noexcept;
	void insert( uint32_t index ,
			T&& item ) noexcept;

	template< typename... Args >
		T& insertNew( uint32_t index ,
				Args&& ... args );

	// ---------------------------------------------------------------------

	void remove( uint32_t index ) noexcept;
	void removeSwap( uint32_t index ) noexcept;
	void removeLast( ) noexcept;

	// ---------------------------------------------------------------------

	void sort( F_Comparator< T > cmp = T_Comparator< T >::compare ) noexcept;
	void sort( uint32_t first ,
			uint32_t items ,
			F_Comparator< T > cmp = T_Comparator< T >::compare ) noexcept;

	// ---------------------------------------------------------------------

	T_Self copyRange( uint32_t first ,
			uint32_t last = UINT32_MAX ) const noexcept;

	T_Self moveRange( uint32_t first ,
			uint32_t last = UINT32_MAX ) noexcept;

	// ---------------------------------------------------------------------

    private:
	void convertToDynamic_( uint32_t capacity ) noexcept;

	T_Static_& static_( ) noexcept;
	T_Static_ const& static_( ) const noexcept;
	T_Dynamic_& dynamic_( ) noexcept;
	T_Dynamic_ const& dynamic_( ) const noexcept;
};


}
#endif // _H_EBCL_ARRAYS
#include <ebcl/inline/Arrays.hh>