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use core::{
    ops::{ Index, IndexMut, Range, RangeFrom, RangeTo, RangeFull, RangeInclusive, RangeToInclusive },
    slice
};

pub mod usize_to_str;


#[derive(Debug)]
pub struct StackStr<'a, const N: usize>
{
    pub bytes: [u8; N],
    pub str_: &'a str
}

impl<'a, const N: usize> StackStr<'a, N>
{

    pub fn str(&self) -> &str {
        self.str()
    }

}

impl<'a, const N: usize> Index<usize> for StackStr<'a, N>
{
    type Output = u8;

    fn index(&self, index: usize) -> &Self::Output {
        unsafe {
            let ptr = self.bytes.as_ptr().add(index);
            &*ptr
        }
    }
}
impl<'a, const N: usize> IndexMut<usize> for StackStr<'a, N> {

    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
        unsafe {
            let ptr = self.bytes.as_mut_ptr().add(index);
            &mut *ptr
        }
    }
}



impl<'a, const N: usize> Index<Range<usize>> for StackStr<'a, N>
{
    type Output = [u8];

    fn index(&self, index: Range<usize>) -> &Self::Output {
        unsafe {
            let start = self.bytes.as_ptr().add(index.start);
            let len = index.end - index.start;
            
            slice::from_raw_parts(start, len)
        }
    }
}
impl<'a, const N: usize> Index<RangeFrom<usize>> for StackStr<'a, N>
{
    type Output = [u8];

    fn index(&self, index: RangeFrom<usize>) -> &Self::Output {
        unsafe {
            let start = self.bytes.as_ptr().add(index.start);
            let len = self.bytes.len() - index.start;
            
            slice::from_raw_parts(start, len)
        }
    }
}
impl<'a, const N: usize> Index<RangeTo<usize>> for StackStr<'a, N>
{
    type Output = [u8];

    fn index(&self, index: RangeTo<usize>) -> &Self::Output {
        unsafe {
            let start = self.bytes.as_ptr();
            let len = index.end;
            
            slice::from_raw_parts(start, len)
        }
    }
}
impl<'a, const N: usize> Index<RangeFull> for StackStr<'a, N>
{
    type Output = [u8];

    fn index(&self, index: RangeFull) -> &Self::Output {
        unsafe {
            let start = self.bytes.as_ptr();
            let len = self.bytes.len();
            
            slice::from_raw_parts(start, len)
        }
    }
}