#!/usr/bin/env bash
set -e

if [[ -n "$PUID" && ! "$PUID" =~ ^[0-9]+$ ]] || [[ -n "$PGID" && ! "$PGID" =~ ^[0-9]+$ ]] || [[ -z "$PUID" && -n "$PGID" ]]; then 
  echo "[entrypoint] ERROR: PUID and PGID must be numeric integers or unset." >&2
  exit 1
fi

# If PUID is not set or is 0, run as root (backwards-compatible default)
if [ -z "$PUID" ] || [ "$PUID" -eq 0 ]; then
  if [ -n "$UMASK" ]; then
    umask "$UMASK"
  fi
  if [ $# -eq 0 ]; then
    set -- /app/convertx
  fi
  exec "$@"
fi

PGID=${PGID:-$PUID}
UMASK=${UMASK:-002}

umask "$UMASK"

if [ "$PGID" -ne "$(id -g convertx)" ]; then
  groupmod -o -g "$PGID" convertx
fi

if [ "$PUID" -ne "$(id -u convertx)" ]; then
  usermod -o -u "$PUID" convertx
fi

# Ensure home directory exists and is owned by convertx
mkdir -p /home/convertx
if [ "$(stat -c '%u:%g' /home/convertx)" != "$PUID:$PGID" ]; then
  chown -R convertx:convertx /home/convertx
fi

# Ensure /app/data exists and fix permissions only if the mount point ownership differs
mkdir -p /app/data
if [ "$(stat -c '%u:%g' /app/data)" != "$PUID:$PGID" ]; then
  find /app/data \( ! -user "$PUID" -o ! -group "$PGID" \) -exec chown -h "$PUID:$PGID" '{}' +
fi

export HOME=/home/convertx

if [ $# -eq 0 ]; then
  set -- /app/convertx
fi

exec gosu convertx "$@"