#!/usr/bin/env bash
# Revert every change made by install.sh, restoring the *.orig backups.
set -euo pipefail
GAME_ROOT="${1:?usage: ./uninstall.sh <game-root-dir>}"
D="$GAME_ROOT/data"
APPID=2326780

restore() {  # <file>
  if [ -f "$1.orig" ]; then
    mv -f "$1.orig" "$1"; echo "restored $(basename "$1")"
  else
    echo "no backup for $(basename "$1") (skipped)"
  fi
}

# kill only this prefix's wineserver, matched via WINEPREFIX in its
# environment; a blanket pkill would lose unflushed registry changes in
# unrelated Wine prefixes
kill_prefix_wineserver() {  # <pfx-dir>
  local pfx pid env_pfx
  pfx="$(cd "$1" 2>/dev/null && pwd)" || return 0
  for pid in $(pgrep -x wineserver 2>/dev/null || true); do
    env_pfx="$(tr '\0' '\n' < "/proc/$pid/environ" 2>/dev/null \
               | sed -n 's/^WINEPREFIX=//p' | head -1 || true)"
    if [ -n "$env_pfx" ] && [ "${env_pfx%/}" = "$pfx" ]; then
      kill -9 "$pid" 2>/dev/null || true
    fi
  done
}

restore "$D/kmyCore.dll"
restore "$D/bakinplayer.exe"
restore "$D/lib/sysresource/shader/include/v2_vpcommon.cgh"

# fix 5 added a single registry value, so remove just that line; restoring a
# whole user.reg backup would wipe every registry change made since install
PFX="$GAME_ROOT/../../compatdata/$APPID/pfx"
REG="$PFX/user.reg"
if [ -f "$REG" ] && grep -qaxF '"UseTakeFocus"="N"' "$REG"; then
  kill_prefix_wineserver "$PFX"   # so wineserver can't flush over our edit
  tmp="$(mktemp)"
  grep -vaxF '"UseTakeFocus"="N"' "$REG" > "$tmp"
  cp "$tmp" "$REG"; rm -f "$tmp"
  echo "removed UseTakeFocus=N from user.reg (.bak-* backups kept as fallback)"
else
  echo "UseTakeFocus=N not present in user.reg (nothing to revert)"
fi

echo "Done. Also clear the game's Steam Launch Options if you set them."