use crate::{errors::RunError, stack::StackVec};

pub fn push(memory: &mut StackVec, data: u16) {
    memory.push(data);
}

pub fn pop(memory: &mut StackVec) {
    memory.pop();
}

pub fn dup(memory: &mut StackVec) {
    let data = memory.last();
    memory.push(data);
}

pub fn swap(memory: &mut StackVec) {
    let a: u16 = memory.pop();
    let b: u16 = memory.pop();

    memory.push(a);
    memory.push(b);
}

pub fn pick(memory: &mut StackVec, data: u16) {
    if data > memory.len() as u16 {
        eprintln!("{}", RunError::PickTooDeep);
        std::process::exit(2);
    }

    let arg = memory.pop();
    memory.push(
        *memory
            .get(memory.len() - (arg as usize) - 1)
            .expect(&format!("{}", RunError::PickOutOfBounds)),
    );
}

pub fn string(memory: &mut StackVec, arg: String) {
    for i in arg.chars() {
        memory.push(i as u16);
    }

    memory.push(arg.len() as u16);
}