#!/usr/bin/env python3
"""Does Ⓐ on a SETTLED BOOT title reach the main menu? One clean trial.

navigation.md carried "the boot title accepts a single Ⓐ (2 of 2 runs)". I
reported a counter-example, then WITHDREW it: three emulators were live at once,
all reading /tmp/xenia_pad.txt and sharing display :98, so a press reached every
instance while `screenshot` grabbed whichever window was topmost. That left the
claim unsupported rather than refuted, and this is the clean re-run.

Gated on the plate pulse (glyph in [500,2500] held 12 samples) so the press lands
on the BOOT title, not the attract loop's -- the attract title is documented as
accepting nothing, and a single `screen_id.py` classification cannot tell them
apart.

After the press it samples every ~2 s for 40 s and reports the glyph series, so
the outcome AND the latency are visible, and a null result is distinguishable
from a slow one.

    a_press_reliability.py OUTDIR [wait_s]
"""
import subprocess, sys, time, os
import numpy as np
from PIL import Image

OUT = sys.argv[1]; WAIT = float(sys.argv[2]) if len(sys.argv) > 2 else 900
W, H = 1280, 720
NEED, CEIL, HOLD = 500, 2500, 12

def _open():
    return subprocess.Popen(
        ["ffmpeg","-loglevel","error","-f","x11grab","-draw_mouse","0",
         "-video_size",f"{W}x{H}","-i",":98","-r","4","-f","rawvideo",
         "-pix_fmt","rgb24","-"], stdout=subprocess.PIPE, bufsize=W*H*3*2)

def glyph(a):
    r,g,b = a[:,:,0],a[:,:,1],a[:,:,2]
    return int(((g>130)&(g-r>45)&(g-b>45)).sum())

def tap(btn, secs=0.5):
    for st in (f"press={btn}",""):
        with open("/tmp/xenia_pad.txt.tmp","w") as f: f.write(st)
        os.replace("/tmp/xenia_pad.txt.tmp","/tmp/xenia_pad.txt")
        if st: time.sleep(secs)

T0=time.time(); p,n,seg,streak=_open(),W*H*3,time.time(),0
state="wait"; t_press=None; samples=[]
while time.time()-T0 < WAIT:
    if time.time()-seg > 30: p.kill(); p=_open(); seg=time.time()
    buf=p.stdout.read(n)
    if len(buf)<n: p.kill(); p=_open(); seg=time.time(); continue
    a=np.frombuffer(buf,np.uint8).reshape(H,W,3).astype(np.uint8)
    c=glyph(a.astype(int))
    if state=="wait":
        streak = streak+1 if NEED<=c<=CEIL else 0
        if streak>=HOLD:
            print(f"[{time.time()-T0:7.1f}s] BOOT TITLE SETTLED (glyph {c}) — pressing A", flush=True)
            Image.fromarray(a).save(f"{OUT}/before.png")
            tap("A",0.5); t_press=time.time(); state="watch"; last=0
    elif state=="watch":
        el=time.time()-t_press
        if el-last >= 2.0:
            last=el; samples.append((el,c))
            Image.fromarray(a).save(f"{OUT}/after-{int(el):02d}.png")
            print(f"    +{el:5.1f}s glyph {c}", flush=True)
        if el > 40: break
p.kill()
print("\nglyph series after the press:", [f"{e:.0f}s:{g}" for e,g in samples], flush=True)
print("A-PRESS TRIAL DONE", flush=True)