#![no_main]
use libfuzzer_sys::fuzz_target;

use std::io::Write as _;

fuzz_target!(|data: &[u8]| {
    // Write the fuzz input to a temporary file, then run it through the WAL
    // replay path.  The goal: verify that no arbitrary byte sequence causes a
    // panic, OOM, or other safety violation.  CRC32 mismatches, truncated
    // entries, bad magic bytes, and oversized length fields are all expected to
    // return an error (not crash).
    let Ok(mut tmp) = tempfile::NamedTempFile::new() else {
        return;
    };
    if tmp.write_all(data).is_err() {
        return;
    }
    // Flush so the reader sees the data.
    let _ = tmp.flush();
    let _ = clawhdf5_agent::wal::WalFile::read_entries(tmp.path());
});