#!/bin/bash
# panel-native Factorio entrypoint.
set -euo pipefail
log() { printf '[panel-factorio] %s\n' "$*"; }

if [[ "$(id -u)" = "0" ]]; then
  chown -R panel:panel /game /game-saves /home/panel 2>/dev/null || true
  exec setpriv --reuid=panel --regid=panel --clear-groups \
       --inh-caps=-all --bounding-set=-all \
       env HOME=/game-saves PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin \
       RCON_PASSWORD="${RCON_PASSWORD:-panel_rcon}" \
       GAME_PORT="${GAME_PORT:-34197}" \
       RCON_PORT="${RCON_PORT:-27015}" \
       /entrypoint.sh "$@"
fi

GAME_DIR=/game
SAVE_DIR=/game-saves
# factorio.com's headless tarball extracts into a `factorio/` subdir. Our
# updater unpacks into /game, so we look for both.
BIN="${GAME_DIR}/factorio/bin/x64/factorio"
if [[ ! -x "${BIN}" ]]; then
  BIN="${GAME_DIR}/bin/x64/factorio"
fi
SAVE="${SAVE_DIR}/saves/default.zip"

if [[ ! -x "${BIN}" ]]; then
  log "ERROR: Factorio binary not found at /game/{factorio/,}bin/x64/factorio."
  log "       Run 'Update' in the panel to install Factorio (Direct provider)."
  exit 78
fi

mkdir -p "${SAVE_DIR}/saves" "${SAVE_DIR}/mods" "${SAVE_DIR}/config" "${SAVE_DIR}/logs"

# Seed server-settings.json from Factorio's shipped example on first boot.
# Without this Factorio fails fast: "Hosting multiplayer game failed:
# filesystem error: file_size(p): unknown error: No such file or directory
# [/game-saves/config/server-settings.json]" — observed on smoke test.
# The example tree lives next to the binary at <bin>/../../data/.
DATA_DIR="$(dirname "${BIN}")/../../data"
if [[ ! -f "${SAVE_DIR}/config/server-settings.json" && -f "${DATA_DIR}/server-settings.example.json" ]]; then
  log "seeding server-settings.json from example"
  cp "${DATA_DIR}/server-settings.example.json" "${SAVE_DIR}/config/server-settings.json"
fi
# map-gen-settings + map-settings aren't required for boot, but having the
# examples in place means operators can edit them via the Files tab without
# having to dig into the binary tree.
for f in map-gen-settings.example.json map-settings.example.json; do
  base="${f%.example.json}.json"
  if [[ ! -f "${SAVE_DIR}/config/${base}" && -f "${DATA_DIR}/${f}" ]]; then
    cp "${DATA_DIR}/${f}" "${SAVE_DIR}/config/${base}"
  fi
done

# Create a default world on first boot — Factorio can't autostart from nothing.
if [[ ! -s "${SAVE}" ]]; then
  log "no existing save — creating default map"
  "${BIN}" --create "${SAVE}"
fi

cd "$(dirname "${BIN}")/../.."
GAME_PORT="${GAME_PORT:-34197}"
RCON_PORT="${RCON_PORT:-27015}"
log "starting Factorio headless server"
log "  save:      ${SAVE}"
log "  settings:  ${SAVE_DIR}/config/server-settings.json"
log "  game port: ${GAME_PORT}/udp"
log "  rcon port: ${RCON_PORT}/tcp"

exec stdbuf -oL -eL "${BIN}" \
    --start-server "${SAVE}" \
    --server-settings "${SAVE_DIR}/config/server-settings.json" \
    --port "${GAME_PORT}" \
    --rcon-port "${RCON_PORT}" \
    --rcon-password "${RCON_PASSWORD}" \
    --mod-directory "${SAVE_DIR}/mods" \
    --console-log "${SAVE_DIR}/logs/factorio.log"