"""EMPIRICAL input sweep: press every key bound in content/bindings.txt, one at a
time, and record what the game log actually does in response.

The static audit finds bindings with no consumer by reading code; this proves it
at runtime.  A key that produces NO log delta and NO channel movement is a
candidate dead binding (cross-check against the audit before believing it -- some
live effects are silent).

Usage:  python keysweep.py [--hold 1.2] [--only W,S,LALT]

SAFETY: launches ONE btl4.exe and kills only that PID.  Do NOT run while a human
is play-testing on this machine (shared GPU + the log would interleave).
"""
import ctypes
import os
import re
import subprocess
import sys
import time

KEYEVENTF_KEYUP = 0x0002
user32 = ctypes.windll.user32

# name -> VK, mirroring engine/MUNGA_L4/L4PADBINDINGS.cpp's table (lines 30-60)
VK = {
    "LSHIFT": 0xA0, "RSHIFT": 0xA1, "LCTRL": 0xA2, "RCTRL": 0xA3,
    "LALT": 0xA4, "RALT": 0xA5, "SPACE": 0x20, "ENTER": 0x0D, "TAB": 0x09,
    "ESC": 0x1B, "UP": 0x26, "DOWN": 0x28, "LEFT": 0x25, "RIGHT": 0x27,
    "NUMPAD0": 0x60, "NUMPAD1": 0x61, "NUMPAD2": 0x62, "NUMPAD3": 0x63,
    "NUMPAD4": 0x64, "NUMPAD5": 0x65, "NUMPAD6": 0x66, "NUMPAD7": 0x67,
    "NUMPAD8": 0x68, "NUMPAD9": 0x69, "NUMPADPLUS": 0x6B,
    "NUMPADMINUS": 0x6D, "NUMPADSTAR": 0x6A, "NUMPADSLASH": 0x6F,
    "NUMPADDOT": 0x6E, "BACKTICK": 0xC0,
}
for c in "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789":
    VK.setdefault(c, ord(c))
for n in range(1, 13):
    VK["F%d" % n] = 0x70 + (n - 1)

REPO = r"C:\git\bt411"
CONTENT = os.path.join(REPO, "content")
EXE = os.path.join(REPO, "build", "Release", "btl4.exe")
LOG = os.path.join(REPO, "scratchpad_keysweep.log")

hold_s = 1.2
only = None
for i, a in enumerate(sys.argv):
    if a == "--hold":
        hold_s = float(sys.argv[i + 1])
    if a == "--only":
        only = [s.strip().upper() for s in sys.argv[i + 1].split(",")]


def parse_bindings():
    rows = []
    path = os.path.join(CONTENT, "bindings.txt")
    for line in open(path, encoding="utf-8", errors="replace"):
        s = line.split("#")[0].strip()
        if not s.lower().startswith("key "):
            continue
        parts = s.split()
        if len(parts) < 3:
            continue
        name = parts[1].upper()
        rows.append((name, " ".join(parts[2:])))
    return rows


rows = parse_bindings()
if only:
    rows = [r for r in rows if r[0] in only]
print("bindings to sweep: %d" % len(rows))

if os.path.exists(LOG):
    os.remove(LOG)

env = dict(os.environ)
env.update({
    "BT_START_INSIDE": "1",
    "BT_KEY_NOFOCUS": "1",
    "BT_MPPR_TRACE": "1",     # mapper demand each 0.5s
    "BT_PAD_LOG": "1",        # [padwrite] button/axis writes
    "BT_KEY_LOG": "1",        # [look] + key diagnostics
    "BT_MODE_LOG": "1",       # [mode] preset/control-mode changes
    "BT_LOG": LOG,
})
proc = subprocess.Popen([EXE, "-egg", "LAST.EGG"], cwd=CONTENT, env=env)
print("pid", proc.pid)

results = []
try:
    deadline = time.time() + 200
    while time.time() < deadline:
        if os.path.exists(LOG) and "[mppr-c]" in open(LOG, errors="replace").read():
            break
        time.sleep(2)
    else:
        print("FAIL: never reached the mission")
        sys.exit(2)
    time.sleep(2)

    for name, target in rows:
        vk = VK.get(name)
        if vk is None:
            results.append((name, target, "NO-VK", 0))
            continue
        before = len(open(LOG, errors="replace").read())
        user32.keybd_event(vk, 0, 0, 0)
        time.sleep(hold_s)
        user32.keybd_event(vk, 0, KEYEVENTF_KEYUP, 0)
        time.sleep(0.6)
        txt = open(LOG, errors="replace").read()
        delta = txt[before:]
        # ignore the always-on heartbeat lines so only real reactions count
        noise = re.compile(r"\[(tick|loadphase|waitscreen|relay-stats|sync|gait|gaitSM|drive|mppr)\]")
        reacted = [l for l in delta.splitlines()
                   if l.strip() and not noise.search(l)]
        # a mapper-demand change also counts as a reaction
        dem = re.findall(r"\[mppr-c\] thr=([-\d.]+) rev=(\d+).*?dmd=([-\d.]+)", delta)
        moved = len(set(dem)) > 1
        results.append((name, target, "; ".join(reacted[:2])[:90] or ("demand moved" if moved else ""), len(reacted) + (1 if moved else 0)))
        print("  %-10s %-34s %s" % (name, target, results[-1][2] or "(silent)"))
finally:
    proc.terminate()

print("\n==== SILENT (candidate dead bindings; cross-check the static audit) ====")
for name, target, note, n in results:
    if n == 0:
        print("  %-10s %s" % (name, target))