package com.peachpasswords.sync

import java.io.IOException

/**
 * Cloudflare Workers caps one WebSocket message at 32 MiB. Keep a generous
 * margin for the Noise authentication tag and platform framing overhead.
 */
const val MAX_SYNC_FRAME_BYTES: Int = 24 * 1024 * 1024

class SyncFrameTooLargeException(
    message: String = "sync frame too large (WebSocket close 1009)",
) : IOException(message)

fun requireSyncFrameSize(size: Int) {
    if (size > MAX_SYNC_FRAME_BYTES) {
        throw SyncFrameTooLargeException("sync frame exceeds $MAX_SYNC_FRAME_BYTES bytes")
    }
}