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use std::os::raw::c_void;

use crate::{
	core::{_InputArray, _InputArrayTrait, _InputOutputArray, _InputOutputArrayTrait, _OutputArray, _OutputArrayTrait},
	Result,
	sys,
	traits::Boxed,
};

/// Trait to serve as a replacement for `InputArray` in C++ OpenCV
///
/// You can pass references to the types implementing this trait everywhere where OpenCV API expects
/// `InputArray` or `InputArrayOfArrays`.
///
/// More info in [OpenCV docs](https://docs.opencv.org/master/d4/d32/classcv_1_1__InputArray.html#details).
pub trait ToInputArray {
	fn input_array(&self) -> Result<_InputArray>;
}

impl ToInputArray for f64 {
	#[inline]
	fn input_array(&self) -> Result<_InputArray> {
		_InputArray::from_f64(self)
	}
}

impl ToInputArray for &f64 {
	#[inline]
	fn input_array(&self) -> Result<_InputArray> {
		(*self).input_array()
	}
}

/// Trait to serve as a replacement for `OutputArray` in C++ OpenCV
///
/// You can pass reference to the type implementing this trait everywhere where OpenCV API expects
/// `OutputArray` or `OutputArrayOfArrays`.
///
/// More info in [OpenCV docs](https://docs.opencv.org/master/d2/d9e/classcv_1_1__OutputArray.html#details).
pub trait ToOutputArray {
	fn output_array(&mut self) -> Result<_OutputArray>;
}

/// Trait to serve as a replacement for `InputOutputArray` in C++ OpenCV
///
/// You can pass reference to the type implementing this trait everywhere where OpenCV API expects
/// `InputOutputArray` or `InputOutputArrayOfArrays`.
///
/// For more info see comments for `ToInputArray` and `ToOutputArray`.
pub trait ToInputOutputArray {
	fn input_output_array(&mut self) -> Result<_InputOutputArray>;
}

impl<T: _InputArrayTrait> ToInputArray for T {
	fn input_array(&self) -> Result<_InputArray> {
		extern "C" { fn cv_InputArray_input_array(instance: *const c_void) -> sys::Result<*mut c_void>; }
		unsafe { cv_InputArray_input_array(self.as_raw__InputArray()) }
			.into_result()
			.map(|ptr| unsafe { _InputArray::from_raw(ptr) })
	}
}

impl<T: _OutputArrayTrait> ToOutputArray for T {
	fn output_array(&mut self) -> Result<_OutputArray> {
		extern "C" { fn  cv_OutputArray_output_array(instance: *mut c_void) -> sys::Result<*mut c_void>; }
		unsafe {  cv_OutputArray_output_array(self.as_raw_mut__OutputArray()) }
			.into_result()
			.map(|ptr| unsafe { _OutputArray::from_raw(ptr) })
	}
}

impl<T: _InputOutputArrayTrait> ToInputOutputArray for T {
	fn input_output_array(&mut self) -> Result<_InputOutputArray> {
		extern "C" { fn cv_InputOutputArray_input_output_array(instance: *mut c_void) -> sys::Result<*mut c_void>; }
		unsafe { cv_InputOutputArray_input_output_array(self.as_raw_mut__InputOutputArray()) }
			.into_result()
			.map(|ptr| unsafe { _InputOutputArray::from_raw(ptr) })
	}
}