"""Q4 — is the atom ID the index into the alphabetical atom-name pointer table?

Validate against the twelve KNOWN auctionInfo atoms. If all twelve agree on one
base, the table is the atom dictionary and we can read the ID of any name.
"""
import struct

KNOWN = {  # atom id -> name, from the confirmed auctionInfo deserializer
    0x57: "bidState", 0x65: "buyNowPrice", 0xC1: "currentBid", 0x116: "expires",
    0x16B: "itemData", 0x2B6: "sellerEstablished", 0x2B7: "sellerName",
    0x2E6: "startingBid", 0x2F4: "coinsProcessed", 0x331: "tradeId",
    0x335: "tradeState", 0x380: "watched",
}


def str_addr(name):
    """Address of the exact NUL-terminated string `name`."""
    for h in find_all(name.encode() + b"\x00", blocks=(".rdata", ".data")):
        return h
    return None


def ptr_addr(sa):
    hits = find_all(struct.pack("<Q", sa), blocks=(".rdata", ".data"))
    return hits[0] if hits else None


print("=" * 78)
print("== solve for the table base using the twelve known atoms")
print("=" * 78)
bases = {}
for aid, name in sorted(KNOWN.items()):
    sa = str_addr(name)
    pa = ptr_addr(sa) if sa else None
    if pa is None:
        print(f"  0x{aid:03x} {name:20s} string=0x{sa or 0:x} pointer=NOT FOUND")
        continue
    base = pa - 8 * aid
    bases[base] = bases.get(base, 0) + 1
    print(f"  0x{aid:03x} {name:20s} str=0x{sa:x} ptr=0x{pa:x} -> base 0x{base:x}")

print()
print("  base histogram:", {hex(b): n for b, n in sorted(bases.items(), key=lambda kv: -kv[1])})
if not bases:
    raise SystemExit("no bases resolved")
BASE = max(bases, key=bases.get)
print(f"  CONSENSUS BASE = 0x{BASE:x}  ({bases[BASE]}/{len(KNOWN)} atoms agree)")

print()
print("=" * 78)
print("== read the atom id of every sold/counts-related name")
print("=" * 78)
for name in ("sold", "selling", "offered", "count", "maxAuctionsAllowed",
             "auctionSoldBid", "auctionSoldBuyNow", "auctionWonBid",
             "auctionWonBuyNow", "auctionLostOutbid", "auctionLostOutbidSelf",
             "auctionLostBidRejected", "credits", "coins", "tradeIdStr",
             "itemState", "offers", "bids", "watched", "expires"):
    sa = str_addr(name)
    pa = ptr_addr(sa) if sa else None
    if pa is None:
        print(f"  {name:24s} ABSENT from the table")
        continue
    off = pa - BASE
    if off % 8:
        print(f"  {name:24s} ptr=0x{pa:x} misaligned (off {off})")
        continue
    print(f"  {name:24s} ptr=0x{pa:x}  ATOM ID = 0x{off // 8:x} ({off // 8})")