#!/usr/bin/env bash
set -euo pipefail

SERVICE_NAME="yourchat2"
PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SERVICE_SRC="${PROJECT_DIR}/yourchat2.service"
SERVICE_DST="/etc/systemd/system/${SERVICE_NAME}.service"
ENV_DIR="/etc/yourchat2"
ENV_FILE="${ENV_DIR}/yourchat2.env"
BIN_PATH="${PROJECT_DIR}/target/release/yourchat2"
INSTALL_BIN="/usr/local/bin/yourchat2"
WORK_DIR="/var/lib/yourchat2"
BUILD_USER="tsschulz"

if [[ "${EUID}" -ne 0 ]]; then
  echo "Dieses Skript muss als root ausgefuehrt werden (z. B. via sudo)." >&2
  exit 1
fi

if [[ ! -f "${SERVICE_SRC}" ]]; then
  echo "Service-Datei nicht gefunden: ${SERVICE_SRC}" >&2
  exit 1
fi

echo "[1/6] Build release binary ..."
sudo -u "${BUILD_USER}" cargo build --release --manifest-path "${PROJECT_DIR}/Cargo.toml"

if [[ ! -x "${BIN_PATH}" ]]; then
  echo "Binary wurde nicht erzeugt: ${BIN_PATH}" >&2
  exit 1
fi

echo "[2/7] Install binary ..."
install -m 0755 "${BIN_PATH}" "${INSTALL_BIN}"

echo "[3/7] Install service file ..."
install -m 0644 "${SERVICE_SRC}" "${SERVICE_DST}"

echo "[4/7] Ensure environment directory ..."
install -d -m 0755 "${ENV_DIR}"

echo "[5/7] Ensure work directory ..."
install -d -m 0750 "${WORK_DIR}"
chown "${BUILD_USER}:${BUILD_USER}" "${WORK_DIR}"

echo "[6/7] Ensure environment file ..."
if [[ ! -f "${ENV_FILE}" ]]; then
  cat > "${ENV_FILE}" <<'EOF'
# yourchat2 environment
# CHAT_WS_ADDR=0.0.0.0:1235
# CHAT_TCP_ADDR=127.0.0.1:1236
# CHAT_UNIX_SOCKET=/run/yourchat2/yourchat2.sock
# CHAT_ALLOWED_USERS=alice,bob
# CHAT_DB_URL=postgres://user:pass@host:5432/dbname
# SECRET_KEY=replace-with-real-secret
EOF
  chmod 0640 "${ENV_FILE}"
  chown root:root "${ENV_FILE}"
fi

echo "[7/7] Reload and enable service ..."
systemctl daemon-reload
systemctl enable --now "${SERVICE_NAME}.service"

echo "[status] Service status ..."
systemctl --no-pager --full status "${SERVICE_NAME}.service" || true

echo
echo "Fertig. Konfiguration bei Bedarf in ${ENV_FILE} anpassen."
echo "Danach neu laden mit: systemctl restart ${SERVICE_NAME}.service"