"""Task B — does FIFA17.exe itself compute the transfer fee / net proceeds?

If the list-item confirmation screen shows "you will receive N", the rounding rule
is IN THE BINARY and needs no live measurement. Look for:
  * localisation keys mentioning tax/fee/net/receive
  * float constants 0.95 / 0.05
  * integer 95 or 5 used with 100 in the same function
"""
import struct

print("=" * 78)
print("== localisation / string keys about tax, fee, net proceeds")
print("=" * 78)
for needle in (b"TAX", b"tax", b"Tax", b"FEE", b"_FEE", b"fee", b"NET", b"_NET",
               b"RECEIVE", b"Receive", b"PROCEEDS", b"COMMISSION", b"EA_TAX",
               b"FUT_TF_", b"AFTER_TAX", b"earnings", b"Earnings"):
    hits = find_all(needle, blocks=(".rdata", ".data"))
    shown = 0
    for h in hits:
        s = rd_str(h, 70)
        if s and len(s) > 2 and s.isprintable():
            print(f"  {needle.decode():10s} 0x{h:x}  {s!r}")
            shown += 1
            if shown >= 12:
                break
    if not shown:
        print(f"  {needle.decode():10s} (no printable hits)")

print()
print("=" * 78)
print("== float constants 0.95 / 0.05 / 0.95f / 0.05f")
print("=" * 78)
for label, pat in (("double 0.95", struct.pack("<d", 0.95)),
                   ("double 0.05", struct.pack("<d", 0.05)),
                   ("float 0.95f", struct.pack("<f", 0.95)),
                   ("float 0.05f", struct.pack("<f", 0.05))):
    hits = find_all(pat, blocks=(".rdata", ".data"))
    print(f"  {label:12s} {[hex(h) for h in hits[:10]] or 'ABSENT'}")
    for h in hits[:6]:
        xs = xrefs_to(h)
        for x in xs[:4]:
            print(f"        used at 0x{x[0]:x} in {x[2]} (entry 0x{x[3]:x})")

print()
print("=" * 78)
print("== functions using BOTH 95 (or 5) and 100 as immediates — integer fee math")
print("=" * 78)
found = []
for f in fm.getFunctions(True):
    ent = int(f.getEntryPoint().getOffset())
    vals = set()
    it = listing.getInstructions(f.getBody(), True)
    while it.hasNext():
        ins = it.next()
        if ins.getMnemonicString() not in ("IMUL", "MOV", "CMP", "ADD", "SUB", "LEA", "SHL"):
            continue
        for i in range(ins.getNumOperands()):
            for o in ins.getOpObjects(i):
                try:
                    v = int(o.getValue())
                except Exception:
                    continue
                if v in (95, 100, 5, 20):
                    vals.add(v)
    if 100 in vals and (95 in vals or 5 in vals):
        found.append((ent, f.getName(), sorted(vals)))
print(f"  {len(found)} candidate(s)")
for ent, nm, vals in found[:40]:
    print(f"  0x{ent:x} {nm:26s} immediates {vals}")