#!/usr/bin/env bash
#
# One-shot deploy: systemd service + packwiz pack + player setup guides.
#
#   ./deploy.sh -n "Opengames" -a themiro -u https://games.abdelbaki.eu/mods \
#       -N 21.1.72 --accept-eula
#
# Runs, in order:
#   1. mc-service-setup.sh   (root)  — minecraft user, NeoForge, systemd units
#   2. packwiz-setup.sh      (you)   — pack, mod index from the mirror, guides
#
# Run as your normal user; it calls sudo for the parts that need it.

set -euo pipefail

NAME=""; AUTHOR=""; BASEURL=""; NFVER="latest"; MCVER="1.21.1"
SHARE="/minecraft"; XMX="13G"; XMS="13G"; ACCEPT_EULA=""
HERE="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"

die()  { echo "error: $*" >&2; exit 1; }
step() { printf '\n\033[1m=== %s ===\033[0m\n\n' "$*"; }
usage() { sed -n '2,13p' "$0" | sed 's/^# \?//'; exit "${1:-0}"; }

while [ $# -gt 0 ]; do
    case "$1" in
        -n|--name)      NAME="${2:-}"; shift 2 ;;
        -a|--author)    AUTHOR="${2:-}"; shift 2 ;;
        -u|--base-url)  BASEURL="${2:-}"; shift 2 ;;
        -N|--neoforge)  NFVER="${2:-}"; shift 2 ;;
        -m|--mc)        MCVER="${2:-}"; shift 2 ;;
        -s|--share)     SHARE="${2:-}"; shift 2 ;;
        -X|--xmx)       XMX="${2:-}"; shift 2 ;;
        -x|--xms)       XMS="${2:-}"; shift 2 ;;
        --accept-eula)  ACCEPT_EULA="--accept-eula"; shift ;;
        -h|--help)      usage 0 ;;
        *) echo "unknown option: $1" >&2; usage 1 ;;
    esac
done

[ "$(id -u)" -ne 0 ] || die "run this as your normal user, not root — it sudos where needed"
[ -n "$NAME" ]    || die "missing -n <pack name>"
[ -n "$AUTHOR" ]  || die "missing -a <author>"
[ -n "$BASEURL" ] || die "missing -u <mirror base url>, e.g. https://games.abdelbaki.eu/mods"

for s in mc-service-setup.sh packwiz-setup.sh mc-refresh-restart.sh; do
    [ -x "$HERE/$s" ] || die "missing or not executable: $HERE/$s"
done

# Fail early rather than halfway through, since step 1 makes system changes.
sudo -v || die "sudo is required"

step "1/2  Minecraft systemd service"
sudo "$HERE/mc-service-setup.sh" \
    -s "$SHARE" -A "$USER" -X "$XMX" -x "$XMS" -m "$MCVER" \
    ${NFVER:+-N "$NFVER"} ${ACCEPT_EULA}

step "2/2  packwiz pack and player guides"
# The admin group membership from step 1 isn't active in this shell yet, so run
# the pack setup under the new group explicitly rather than telling you to log
# out and back in.
if id -nG "$USER" | tr ' ' '\n' | grep -qx minecraft; then
    "$HERE/packwiz-setup.sh" -n "$NAME" -a "$AUTHOR" -m "$MCVER" -u "$BASEURL" -s "$SHARE"
else
    sg minecraft -c "$(printf '%q ' "$HERE/packwiz-setup.sh" -n "$NAME" -a "$AUTHOR" \
        -m "$MCVER" -u "$BASEURL" -s "$SHARE")"
fi

step "Done"
cat <<EOF
Start the server:

  sudo systemctl start minecraft
  journalctl -u minecraft -f

Keep it in sync after adding mods to $SHARE/mods:

  $HERE/mc-refresh-restart.sh

Edit the config block at the top of mc-refresh-restart.sh first — it needs
PACK_DIR, BASE_URL and PACK_URL pointed at what this run just created.
EOF