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

echo "[1/6] Backing up nginx confs..."
./scripts/backup_nginx_confs.sh

echo "[2/6] Checking required environment variables..."
REQUIRED=("PORT" "APP_HOST" "DEFAULT_STORAGE" "SIGNER_WS_URL" "SIGNER_API_KEY")
MISSING=()
for v in "${REQUIRED[@]}"; do
  if [ -z "${!v:-}" ]; then MISSING+=("$v"); fi
done
if [ ${#MISSING[@]} -gt 0 ]; then
  echo "Missing env vars: ${MISSING[*]}" >&2; exit 1; fi

echo "[3/6] Building backend..."
npm run build --silent

echo "[4/6] Starting backend (detached) if not already running..."
if ! nc -z localhost "${PORT}" >/dev/null 2>&1; then
  nohup node dist/server.js > logs/backend.out 2>&1 &
  echo $! > logs/server.pid
  sleep 2
fi
if ! nc -z localhost "${PORT}" >/dev/null 2>&1; then echo "Backend not listening on ${PORT}" >&2; exit 1; fi

echo "[5/6] Curl checks - backend health and key routes..."
set +e
curl -fsS "http://localhost:${PORT}/api/v1/health" | jq . >/dev/null && echo "OK /api/v1/health" || { echo "FAIL /api/v1/health"; exit 1; }
curl -fsS -X OPTIONS -H "Origin: ${APP_HOST}" "http://localhost:${PORT}/api/v1/health" -o /dev/null && echo "OK CORS preflight" || { echo "FAIL CORS"; exit 1; }
set -e

echo "[6/6] External service checks..."
echo "- Checking mempool signet..."
curl -fsS "https://mempool2.4nkweb.com/fr/docs/api/rest" -o /dev/null && echo "OK mempool" || echo "WARN mempool unreachable"
echo "- Checking signer relay ws..."
if command -v wscat >/dev/null 2>&1; then
  ( timeout 3 wscat -c "${SIGNER_WS_URL/ws:/wss:}" >/dev/null 2>&1 && echo "OK signer ws connect" ) || echo "WARN signer ws connect failed"
else
  echo "wscat not installed; skipping ws check"
fi

echo "All checks done."