#![no_main]

use libfuzzer_sys::fuzz_target;
use wgcloak::transport::tls_tcp::FrameCodec;

const MAX_INPUT: usize = 64 * 1024;
const MAX_FRAME: usize = 16 * 1024;
const CHUNK: usize = 97;

fuzz_target!(|input: &[u8]| {
    let input = &input[..input.len().min(MAX_INPUT)];
    let Ok(mut codec) = FrameCodec::new(MAX_FRAME) else {
        return;
    };

    // Feed deliberately uneven chunks so header/payload state transitions are
    // exercised independently of TCP read boundaries.
    for chunk in input.chunks(CHUNK) {
        if codec.feed(chunk).is_err() {
            break;
        }
    }
    let _ = codec.finish();
});