use std::collections::VecDeque;

const MAX_LINES: usize = 2000;

pub struct LogBuffer {
    lines: VecDeque<String>,
    pub dirty: bool,
}

impl LogBuffer {
    pub fn new() -> Self {
        Self {
            lines: VecDeque::with_capacity(MAX_LINES),
            dirty: false,
        }
    }

    pub fn push(&mut self, line: String) {
        if self.lines.len() >= MAX_LINES {
            self.lines.pop_front();
        }
        self.lines.push_back(line);
        self.dirty = true;
    }

    pub fn lines(&self) -> impl Iterator<Item = &str> {
        self.lines.iter().map(String::as_str)
    }

    pub fn clear(&mut self) {
        self.lines.clear();
        self.dirty = true;
    }
}