#![no_main]
use libfuzzer_sys::fuzz_target;

fuzz_target!(|data: &[u8]| {
    let mut state = dd3_protocol::ReassemblyState::default();
    let mut buffer = [0u8; 4096];

    let mut pos = 0usize;
    while pos + 7 <= data.len() {
        let batch_id = u16::from_le_bytes([data[pos], data[pos + 1]]);
        let idx = data[pos + 2];
        let cnt = data[pos + 3];
        let total_len = u16::from_le_bytes([data[pos + 4], data[pos + 5]]);
        let chunk_len = data[pos + 6] as usize;
        pos += 7;
        if pos + chunk_len > data.len() {
            break;
        }
        let chunk = &data[pos..pos + chunk_len];
        pos += chunk_len;

        let _ = dd3_protocol::push_chunk(
            &mut state,
            batch_id,
            idx,
            cnt,
            total_len,
            chunk,
            0,
            5000,
            4096,
            &mut buffer,
        );
    }
});