use std::sync::RwLock;

#[derive(Clone)]
pub enum BufferChunk {
    StdOut(String),
    StdErr(String),
}

pub struct IoBuffer {
    buffer: Vec<BufferChunk>,
}

impl IoBuffer {
    const fn new() -> Self {
        Self {
            buffer: Vec::new(),
        }
    }

    pub fn get(&self) -> Vec<BufferChunk> {
        self.buffer.clone()
    }

    pub fn print<S>(&mut self, value: S)
    where
        S: std::string::ToString
    {
        self.buffer.push(BufferChunk::StdOut(value.to_string()))
    }

    pub fn error<S>(&mut self, value: S)
    where
        S: std::string::ToString
    {
        self.buffer.push(BufferChunk::StdErr(value.to_string()))
    }
}

static STDOUT_BUFFER: RwLock<IoBuffer> = RwLock::new(IoBuffer::new());

pub fn iobuffer() -> &'static RwLock<IoBuffer> {
    &STDOUT_BUFFER
}