use alloc::{string::String, vec, vec::Vec};
// use crate::String;
// use crate::Vec;
use lazy_static::lazy_static;
#[derive(Debug)]
pub enum Mime {
    None,
    Text(String),
}

lazy_static! {
    pub static ref CLIPBOARD: spin::Mutex<Clipboard> = {
        let clipboard = Clipboard::new();
        spin::Mutex::new(clipboard)
    };
}

// ctrl+v paste but not pop and pastes
// ctrl+shift+v pops from the stack and pastes
// ctrl+c pushes to the stack
// ctrl+shift+< move stack pointer left
// ctrl+shift+> move stack pointer right

pub struct Clipboard {
    pub index: usize,
    pub pages: Vec<Mime>,
}
impl Clipboard {
    pub fn new() -> Clipboard {
        Clipboard {
            index: 0,
            pages: vec![],
        }
    }
    pub fn clear(&mut self) {
        self.pages = vec![];
    }
    pub fn set_index(&mut self, index_new: usize) {
        self.index = index_new;
    }
    pub fn clip_end(&mut self) {
        self.index = 0;
    }
    pub fn clip_home(&mut self) {
        self.index = self.pages.len();
    }
    pub fn copy(&mut self, copy_mime: Mime) {
        self.pages.push(copy_mime);
    }
    pub fn paste(&mut self) -> &Mime {
        let paste_pos = &self.pages[self.index];
        paste_pos
    }
}