"""#48 solo test: does moving a coolant VALVE after the coolant BARS have
repainted leave a stuck XOR block on the Heat panel?

Hypothesis (from operator_1.log): VertNormalSlider paints its indicator with an
XOR fill and "erases" by XORing the same spot.  Firing drops CoolantMass, which
repaints the coolant vertBars over the valve track; a later valve move then XORs
pixels that are no longer the indicator -> a permanently stuck block.

Sequence: autofire (coolant falls) + periodic 'C' valve presses, capturing the
composite each cycle, then diff the Heat panel region for pixels that turn ON and
STAY on.

Kills only the PID it spawns.
"""
import ctypes
import os
import shutil
import subprocess
import sys
import time

KEYUP = 0x0002
VK_C = ord('C')
user32 = ctypes.windll.user32

REPO = r"C:\git\bt411"
CONTENT = os.path.join(REPO, "content")
EXE = os.path.join(REPO, "build", "Release", "btl4.exe")
SHOT = os.path.join(REPO, "scratchpad_valve.png")
LOG = os.path.join(REPO, "scratchpad_valve.log")
OUT = os.path.join(REPO, "scratchpad", "valve")
os.makedirs(OUT, exist_ok=True)
for f in (SHOT, LOG):
    if os.path.exists(f):
        os.remove(f)

env = dict(os.environ)
env.update({
    "BT_START_INSIDE": "1",
    "BT_KEY_NOFOCUS": "1",
    "BT_DEV_GAUGES": "1",     # cockpit surround -> BT_SHOT captures the panels
    "BT_AUTOFIRE": "1",       # hold the trigger: coolant mass falls, bars repaint
    "BT_SHOT": SHOT,
    "BT_LOG": LOG,
})
proc = subprocess.Popen([EXE, "-egg", "LAST.EGG"], cwd=CONTENT, env=env)
print("pid", proc.pid)

def tap(vk, hold=0.12):
    user32.keybd_event(vk, 0, 0, 0)
    time.sleep(hold)
    user32.keybd_event(vk, 0, KEYUP, 0)

frames = []
try:
    # wait for the mission (the shot file only appears once rendering starts)
    deadline = time.time() + 220
    while time.time() < deadline:
        if os.path.exists(SHOT) and os.path.getsize(SHOT) > 20000:
            break
        time.sleep(2)
    else:
        print("FAIL: never rendered"); sys.exit(2)
    time.sleep(6)

    for cycle in range(6):
        # let autofire burn coolant so the bars repaint
        time.sleep(7)
        dst = os.path.join(OUT, "f%d_before_valve.png" % cycle)
        try:
            shutil.copy(SHOT, dst); frames.append(dst)
        except Exception as e:
            print("  copy failed:", e)
        # move a coolant valve -> XOR erase at the old row
        tap(VK_C)
        print("  cycle %d: valve tap sent" % cycle)
        time.sleep(4)
        dst = os.path.join(OUT, "f%d_after_valve.png" % cycle)
        try:
            shutil.copy(SHOT, dst); frames.append(dst)
        except Exception as e:
            print("  copy failed:", e)
finally:
    proc.terminate()
    time.sleep(1)

print("\ncaptured %d frames in %s" % (len(frames), OUT))
txt = open(LOG, errors="replace").read() if os.path.exists(LOG) else ""
import re
print("[valve] events :", len(re.findall(r"^\[valve\]", txt, re.M)))
for l in re.findall(r"^\[valve\].*$", txt, re.M)[:8]:
    print("   ", l)
print("[emitter] FIRED:", len(re.findall(r"\[emitter\] FIRED", txt)))