#!/usr/bin/env bash
# Run on the Linux production host (CI SSHs here after pushing :v* images).
# Usage: ./prod-remote-deploy.sh v1.0.1
set -euo pipefail

TAG="${1:?usage: prod-remote-deploy.sh v1.0.1}"
INFRA="${PROD_INFRA_DIR:-/opt/dyolink/infrastructure}"
cd "$INFRA"

if [ ! -f .env ]; then
  echo "Missing $INFRA/.env — copy deploy.prod.env.example and set DOMAIN=nudentic.ir REGISTRY_PREFIX=wixur.ir:3000/<owner>"
  exit 1
fi

if ! grep -q '^REGISTRY_PREFIX=.\+' .env; then
  echo "Set REGISTRY_PREFIX in .env (Gitea registry, e.g. wixur.ir:3000/admin). Do not use Docker Hub :latest for tag deploys."
  exit 1
fi

export TAG

# Windows Gitea often RSTs concurrent or long pulls (connection reset by peer).
# Pull one image at a time with backoff so a flake does not fail the whole tag.
pull_one() {
  local service="$1"
  local attempt=1
  local max=5
  local delay=8
  while [ "$attempt" -le "$max" ]; do
    echo "Pulling $service :$TAG (attempt $attempt/$max)"
    if docker compose -f docker-compose.prod.yml --env-file .env pull "$service"; then
      return 0
    fi
    if [ "$attempt" -eq "$max" ]; then
      echo "Failed to pull $service after $max attempts"
      return 1
    fi
    echo "Pull of $service failed; retrying in ${delay}s..."
    sleep "$delay"
    delay=$((delay * 2))
    attempt=$((attempt + 1))
  done
}

echo "Pulling backend/frontend :$TAG from Gitea (REGISTRY_PREFIX in .env)"
pull_one backend
pull_one frontend
docker compose -f docker-compose.prod.yml --env-file .env up -d
echo "=== Status ==="
docker compose -f docker-compose.prod.yml --env-file .env ps
echo "Health: https://nudentic.ir/api/health"