#!/usr/bin/env python3
"""Death-camera forensics on the saved networked death:
per draw frame, where is the CHAIN camera eye vs the player vehicle root?
Does the chain legitimately transit >100m away (portal ride) -- i.e. is the
fp_cam <100m sanity guard what forces the escape-pod-interior view?
Also log view-flush params (fog near/far/rgb + full float head) around the
transit to find a robust 'death sequence active' gate."""
import struct, sys, os
sys.path.insert(0, r'c:\VWE\TeslaRel410\dpl3-revive\patha')
os.environ.setdefault('SDL_VIDEODRIVER', 'dummy')
import numpy as np
from vrboard import VirtualBoard, Msg
from vrview import Renderer

path = os.path.join(os.path.dirname(__file__), '..', 'captures', 'netdeath-20260708.fifodump')
data = open(path, 'rb').read()
board = VirtualBoard()
r = Renderer(w=64, h=40)

frames = 0
created = {}
fogs = []       # (frame, floats[:24])
track = []      # (frame, chain_eye, veh_t, dist)
o = 0
while o + 8 <= len(data):
    if data[o:o+4] != b'VPXM':
        o += 1; continue
    ln = struct.unpack_from('<I', data, o+4)[0]
    if o + 8 + ln > len(data): break
    body = data[o+8:o+8+ln]; o += 8 + ln
    if len(body) < 4: continue
    a = struct.unpack_from('<I', body, 0)[0]
    if a >= 0x100: continue
    p = body[4:]
    if a == 1 and len(p) >= 8:
        created[struct.unpack_from('<I', p, 4)[0]] = struct.unpack_from('<I', p, 0)[0]
    elif a == 3 and len(p) >= 96:
        h = struct.unpack_from('<I', p, 0)[0]
        if created.get(h) == 3:
            fogs.append((frames, struct.unpack_from('<24f', p, 4)))
    try: board.handle(Msg(False, 0xff, a, p))
    except Exception: pass
    if a == 9:
        frames += 1
        try:
            r.cache.maybe_rebuild(board)
            Mc = np.asarray(r.cam_matrix(board), float)
            ec = Mc[3, :3]
        except Exception:
            ec = None
        anim = board.anim_abs
        t = None
        chain = getattr(r.cache, 'cam_chain', None)
        h = None
        if chain and chain[-1] in anim:
            h = chain[-1]
        elif anim:
            h = max(anim, key=lambda k: float(np.abs(np.array(anim[k][9:12])).sum()))
        if h is not None:
            t = np.array(anim[h][9:12])
        if ec is not None:
            d = float(np.linalg.norm(ec - t)) if t is not None else -1.0
            track.append((frames, ec.copy(), None if t is None else t.copy(), d))

print(f"total draw frames: {frames}, tracked: {len(track)}")

# find where the chain eye leaves the vehicle by >100m (the guard threshold)
first_far = next((i for i, (f, ec, t, d) in enumerate(track) if d > 100.0), None)
print(f"first frame with chain-vehicle distance >100m: "
      + (f"f{track[first_far][0]}" if first_far is not None else "NONE"))

# print the trajectory every ~30 frames over the last 1200 frames
print("\n-- chain eye vs vehicle root (tail):")
tail = track[-1200:]
for i in range(0, len(tail), 30):
    f, ec, t, d = tail[i]
    ts = "None" if t is None else f"({t[0]:8.1f},{t[1]:7.1f},{t[2]:8.1f})"
    print(f"  f{f}: eye=({ec[0]:8.1f},{ec[1]:7.1f},{ec[2]:8.1f}) veh={ts} dist={d:8.1f}")

# fog/view flushes in the tail window, with the full float head for gate hunting
if track:
    cut = track[-1200][0] if len(track) >= 1200 else track[0][0]
    print(f"\n-- view flushes after f{cut} (floats 14..23):")
    last = None
    for f, fl in fogs:
        if f < cut: continue
        k = tuple(round(x, 2) for x in fl[14:24])
        if k != last:
            print(f"  f{f}: " + " ".join(f"{x:.2f}" for x in k))
            last = k