//! Parse input from stdin and log actions on stdout
use std::io::{self, Read};

use copa::{Params, Parser, Perform};

/// A type implementing Perform that just logs actions
struct Log;

impl Perform for Log {
    fn print(&mut self, c: char) {
        println!("[print] {:?}", c);
    }

    fn execute(&mut self, byte: u8) {
        println!("[execute] {:02x}", byte);
    }

    fn hook(&mut self, params: &Params, intermediates: &[u8], ignore: bool, c: char) {
        println!(
            "[hook] params={:?}, intermediates={:?}, ignore={:?}, char={:?}",
            params, intermediates, ignore, c
        );
    }

    fn put(&mut self, byte: u8) {
        println!("[put] {:02x}", byte);
    }

    fn unhook(&mut self) {
        println!("[unhook]");
    }

    fn osc_dispatch(&mut self, params: &[&[u8]], bell_terminated: bool) {
        println!(
            "[osc_dispatch] params={:?} bell_terminated={}",
            params, bell_terminated
        );
    }

    fn csi_dispatch(
        &mut self,
        params: &Params,
        intermediates: &[u8],
        ignore: bool,
        c: char,
    ) {
        println!(
            "[csi_dispatch] params={:#?}, intermediates={:?}, ignore={:?}, char={:?}",
            params, intermediates, ignore, c
        );
    }

    fn esc_dispatch(&mut self, intermediates: &[u8], ignore: bool, byte: u8) {
        println!(
            "[esc_dispatch] intermediates={:?}, ignore={:?}, byte={:02x}",
            intermediates, ignore, byte
        );
    }
}

fn main() {
    let input = io::stdin();
    let mut handle = input.lock();

    let mut statemachine = Parser::new();
    let mut performer = Log;

    let mut buf = [0; 2048];

    loop {
        match handle.read(&mut buf) {
            Ok(0) => break,
            Ok(n) => {
                for byte in &buf[..n] {
                    statemachine.advance(&mut performer, *byte);
                }
            }
            Err(err) => {
                println!("err: {}", err);
                break;
            }
        }
    }
}
