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

BASE="${FURNITURE_PROD_BASE:-/opt/furniture-3d-system-prod}"
APP_ROOT="$BASE/current/furniture-3d-system"
SERVICE_NAME="${PRODUCT_INVENTORY_SNAPSHOT_SERVICE_NAME:-furniture-product-inventory-snapshot}"
SYNC_ENV="$BASE/shared/product-inventory-snapshot.env"
CALENDAR="${PRODUCT_INVENTORY_SNAPSHOT_CALENDAR:-*:0/15}"

if [ "$(id -u)" -ne 0 ]; then
  echo "This installer requires root." >&2
  exit 1
fi
if [ ! -f "$APP_ROOT/scripts/sync-product-inventory-snapshot.ts" ]; then
  echo "Missing deployed snapshot script: $APP_ROOT/scripts/sync-product-inventory-snapshot.ts" >&2
  exit 1
fi

if [ ! -f "$SYNC_ENV" ]; then
  umask 077
  cat >"$SYNC_ENV" <<EOF
# 商品库存管理 · 15 分钟库存快照
# 身份校验值必须填生产实际值，否则同步脚本拒绝写入。
# 取值方式：node_modules/.bin/tsx -e "import {loadEnvConfig} from '@next/env';loadEnvConfig(process.cwd());console.log(process.env.DATABASE_URL)"
PRODUCT_INVENTORY_SNAPSHOT_EXPECTED_DATABASE_IDENTITY=
PRODUCT_INVENTORY_SNAPSHOT_EXPECTED_SOURCE_DATABASE_IDENTITY=
EOF
  echo "Created env template: $SYNC_ENV"
fi

chmod 600 "$SYNC_ENV"

cat >"/etc/systemd/system/$SERVICE_NAME.service" <<EOF
[Unit]
Description=Materialize product inventory snapshot
After=network-online.target
Wants=network-online.target
[Service]
Type=oneshot
WorkingDirectory=$APP_ROOT
Environment=NODE_ENV=production
EnvironmentFile=$BASE/shared/.env
EnvironmentFile=$SYNC_ENV
ExecStart=/bin/bash -lc 'exec ./node_modules/.bin/tsx scripts/sync-product-inventory-snapshot.ts --apply --confirm=sync-product-inventory-snapshot --expected-database-identity="\${PRODUCT_INVENTORY_SNAPSHOT_EXPECTED_DATABASE_IDENTITY:?Missing expected local identity}" --expected-source-database-identity="\${PRODUCT_INVENTORY_SNAPSHOT_EXPECTED_SOURCE_DATABASE_IDENTITY:?Missing expected source identity}"'
TimeoutStartSec=30min
Restart=on-failure
RestartSec=15min
EOF

cat >"/etc/systemd/system/$SERVICE_NAME.timer" <<EOF
[Unit]
Description=Product inventory snapshot every 15 minutes
[Timer]
OnCalendar=$CALENDAR
Persistent=true
Unit=$SERVICE_NAME.service
[Install]
WantedBy=timers.target
EOF

systemctl daemon-reload
systemctl enable --now "$SERVICE_NAME.timer"
systemctl list-timers --all "$SERVICE_NAME.timer" --no-pager