#!/usr/bin/env bash
# Watch a live recording until its downloaders exit, and record HOW they ended.
#
# The question this answers: when the stream stops, does ffmpeg finish cleanly
# on #EXT-X-ENDLIST, or does it hang until something kills it? Unattended
# recording depends on the answer -- a job that never exits needs a hard cap.
set -u
cd "$(dirname "$0")"
LOG=logs/endwatch.log
mkdir -p logs

say() { echo "[$(date '+%H:%M:%S')] $*" | tee -a "$LOG"; }

say "endwatch start"
LAST_TOTAL=0
STALL=0

while true; do
  N=$(tasklist //FI "IMAGENAME eq ffmpeg.exe" 2>/dev/null | grep -c ffmpeg.exe)
  TOTAL=0
  for f in recordings/*; do
    [ -f "$f" ] && TOTAL=$(( TOTAL + $(stat -c%s "$f") ))
  done
  MB=$(( TOTAL / 1048576 ))
  GROW=$(( (TOTAL - LAST_TOTAL) / 1024 ))

  if [ "$TOTAL" -eq "$LAST_TOTAL" ]; then
    STALL=$(( STALL + 1 ))
  else
    STALL=0
  fi
  LAST_TOTAL=$TOTAL

  say "ffmpeg=$N  total=${MB}MB  grew=${GROW}KB  stalled_ticks=$STALL"

  if [ "$N" -eq 0 ]; then
    say "ALL DOWNLOADERS EXITED -- stream ended and ffmpeg finished on its own"
    break
  fi
  if [ "$STALL" -ge 10 ]; then
    say "STALLED: files not growing for ~5min but ffmpeg still alive"
    say "  -> it does NOT self-terminate cleanly; unattended runs need a hard cap"
    break
  fi
  sleep 30
done

say "final state:"
for f in recordings/*; do
  [ -f "$f" ] || continue
  D=$(ffprobe -v error -show_entries format=duration -of csv=p=0 "$f" 2>/dev/null)
  say "  $(basename "$f")  $(( $(stat -c%s "$f") / 1048576 ))MB  duration=${D:-unknown}s"
done
say "endwatch done"