// Stolen from https://github.com/c1m50c/fixed-vectors (MIT license)
#[doc(hidden)]
#[macro_export(local_inner_macros)]
macro_rules! impl_vector {
	( $struct: ident { $($field: ident), + }, ( $($generic: ident), + ), $size: expr ) => {
		impl<T> $struct<T> {
			/// Constructs a new vector with the specified values for each field.
			///
			/// # Example
			///
			/// ```
			/// use fixed_wide_vectors::Vector2;
			///
			/// let vec2 = Vector2::new(0, 0);
			///
			/// assert_eq!(vec2.x, 0);
			/// assert_eq!(vec2.y, 0);
			/// ```
			#[inline(always)]
			pub const fn new( $($field: T), + ) -> Self {
				Self {
					$( $field ), +
				}
			}

			/// Consumes the vector and returns its values as an array.
			///
			/// # Example
			///
			/// ```
			/// use fixed_wide_vectors::Vector2;
			///
			/// let vec2 = Vector2::new(0, 0);
			/// let array = vec2.to_array();
			///
			/// assert_eq!(array, [0, 0]);
			/// ```
			#[inline(always)]
			pub fn to_array(self) -> [T; $size] {
				[ $(self.$field), + ]
			}

			/// Consumes the vector and returns its values as a tuple.
			///
			/// # Example
			///
			/// ```
			/// use fixed_wide_vectors::Vector2;
			///
			/// let vec2 = Vector2::new(0, 0);
			/// let tuple = vec2.to_tuple();
			///
			/// assert_eq!(tuple, (0, 0));
			/// ```
			#[inline(always)]
			pub fn to_tuple(self) -> ( $($generic), + ) {
				( $(self.$field), + )
			}

			/// Consumes the vector and returns a new vector with the given function applied on each field.
			///
			/// # Example
			///
			/// ```
			/// use fixed_wide_vectors::Vector2;
			///
			/// let vec2 = Vector2::new(1, 2)
			///     .map(|i| i * 2);
			///
			/// assert_eq!(vec2, Vector2::new(2, 4));
			/// ```
			#[inline]
			pub fn map<F, U>(self, f: F) -> $struct<U>
			where
				F: Fn(T) -> U
			{
				$struct {
					$( $field: f(self.$field) ), +
				}
			}
		}

		impl<T: Copy> $struct<T> {
			/// Constructs a vector using the given `value` as the value for all of its fields.
			///
			/// # Example
			///
			/// ```
			/// use fixed_wide_vectors::Vector2;
			///
			/// let vec2 = Vector2::from_value(0);
			///
			/// assert_eq!(vec2, Vector2::new(0, 0));
			/// ```
			#[inline(always)]
			pub const fn from_value(value: T) -> Self {
				Self {
					$( $field: value ), +
				}
			}
		}

		impl<T> From<[T; $size]> for $struct<T> {
			fn from(from: [T; $size]) -> Self {
				let mut iterator = from.into_iter();

				Self {
					// SAFETY: We know the size of `from` so `iterator.next()` is always `Some(..)`
					$( $field: unsafe { iterator.next().unwrap_unchecked() } ), +
				}
			}
		}

		impl<T> From<($($generic), +)> for $struct<T> {
			fn from(from: ($($generic), +)) -> Self {
				let ( $($field), + ) = from;

				Self {
					$( $field ), +
				}
			}
		}

		impl<T: core::fmt::Debug> core::fmt::Debug for $struct<T> {
			fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
				let identifier = core::stringify!($struct);

				f.debug_struct(identifier)
					$( .field( core::stringify!($field), &self.$field ) ) +
					.finish()
			}
		}

		impl<T: PartialEq> PartialEq for $struct<T> {
			fn eq(&self, other: &Self) -> bool {
				$( self.$field == other.$field ) && +
			}
		}

		impl<T: Eq> Eq for $struct<T> {  }

		impl<T: core::hash::Hash> core::hash::Hash for $struct<T> {
			fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
				$( self.$field.hash(state); ) +
			}
		}

		impl<T: Clone> Clone for $struct<T> {
			fn clone(&self) -> Self {
				Self {
					$( $field: self.$field.clone() ), +
				}
			}
		}

		impl<T: Copy> Copy for $struct<T> {  }

		impl<T: Default> Default for $struct<T> {
			fn default() -> Self {
				Self {
					$( $field: T::default() ), +
				}
			}
		}

		impl<T: Ord> $struct<T> {
			pub fn min(self, rhs: Self) -> $struct<T> {
				$struct{
					$( $field: self.$field.min(rhs.$field) ), +
				}
			}
			pub fn max(self, rhs: Self) -> $struct<T> {
				$struct{
					$( $field: self.$field.max(rhs.$field) ), +
				}
			}
			pub fn cmp(self, rhs: Self) -> $struct<core::cmp::Ordering> {
				$struct{
					$( $field: self.$field.cmp(&rhs.$field) ), +
				}
			}
			pub fn lt(self, rhs: Self) -> $struct<bool> {
				$struct{
					$( $field: self.$field.lt(&rhs.$field) ), +
				}
			}
			pub fn gt(self, rhs: Self) -> $struct<bool> {
				$struct{
					$( $field: self.$field.gt(&rhs.$field) ), +
				}
			}
			pub fn ge(self, rhs: Self) -> $struct<bool> {
				$struct{
					$( $field: self.$field.ge(&rhs.$field) ), +
				}
			}
			pub fn le(self, rhs: Self) -> $struct<bool> {
				$struct{
					$( $field: self.$field.le(&rhs.$field) ), +
				}
			}
		}

		impl $struct<bool>{
			pub fn all(&self)->bool{
				const ALL:[bool;$size]=[true;$size];
				core::matches!(self.to_array(),ALL)
			}
			pub fn any(&self)->bool{
				$( self.$field )|| +
			}
		}

		impl<T: core::ops::Neg<Output = T>> core::ops::Neg for $struct<T> {
			type Output = Self;

			fn neg(self) -> Self::Output {
				Self {
					$( $field: -self.$field ), +
				}
			}
		}

		// Impl arithmetic pperators
		$crate::impl_vector_operator!( $struct { $($field), + }, AddAssign, add_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, Add, add, Self );
		$crate::impl_vector_operator!( $struct { $($field), + }, SubAssign, sub_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, Sub, sub, Self );
		$crate::impl_vector_operator!( $struct { $($field), + }, MulAssign, mul_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, Mul, mul, Self );
		$crate::impl_vector_operator!( $struct { $($field), + }, DivAssign, div_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, Div, div, Self );
		$crate::impl_vector_operator!( $struct { $($field), + }, RemAssign, rem_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, Rem, rem, Self );

		// Impl bitwise operators
		$crate::impl_vector_operator!( $struct { $($field), + }, BitAndAssign, bitand_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, BitAnd, bitand, Self );
		$crate::impl_vector_operator!( $struct { $($field), + }, BitOrAssign, bitor_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, BitOr, bitor, Self );
		$crate::impl_vector_operator!( $struct { $($field), + }, BitXorAssign, bitxor_assign );
		$crate::impl_vector_operator!( $struct { $($field), + }, BitXor, bitxor, Self );

		// Impl floating-point based methods
		#[cfg(feature="fixed_wide_traits")]
		$crate::impl_wide_vector_operations!( $struct { $($field), + }, $size );
	};
}


#[doc(hidden)]
#[macro_export(local_inner_macros)]
macro_rules! impl_vector_operator {
	( $struct: ident { $($field: ident), + }, $trait: ident, $method: ident, $output: ty ) => {
		impl<T:core::ops::$trait<Output=T>> core::ops::$trait for $struct<T> {
			type Output = $output;

			fn $method(self, other: Self) -> Self::Output {
				Self {
					$( $field: self.$field.$method(other.$field) ), +
				}
			}
		}
		impl<T:core::ops::$trait<Output=T>+Copy> core::ops::$trait<T> for $struct<T>{
			type Output = $output;

			fn $method(self, other: T) -> Self::Output {
				$struct {
					$( $field: self.$field.$method(other) ), +
				}
			}
		}
	};

	( $struct: ident { $($field: ident), + }, $trait: ident, $method: ident ) => {
		impl<T: core::ops::$trait> core::ops::$trait for $struct<T> {
			fn $method(&mut self, other: Self)  {
				$( self.$field.$method(other.$field) ); +
			}
		}

		impl<T: core::ops::$trait + Copy> core::ops::$trait<T> for $struct<T> {
			fn $method(&mut self, other: T)  {
				$( self.$field.$method(other) ); +
			}
		}
	};
}