#!/usr/bin/env bash
# Deploy the Hub to a host: rsync the repo, install deps, build, restart service.
#
# Configure these env vars (e.g. in CI secrets):
#   PLATFORM_DEPLOY_HOST     required
#   PLATFORM_DEPLOY_SSH_KEY  required (private key for the deploy user)
#   PLATFORM_DEPLOY_USER     optional, defaults to deploy
#   PLATFORM_DEPLOY_PORT     optional, defaults to 22
#   PLATFORM_DEPLOY_BASE     optional, defaults to /srv/curriculum-project-hub
#   PLATFORM_DEPLOY_HEALTH_URL optional, defaults to http://127.0.0.1:8788/api/healthz
# The target host must have Node.js 20+, npm, rsync, PostgreSQL client tools
# (`pg_isready`), systemd, bubblewrap (`bwrap`) and `socat` (for the ADR-0018 agent sandbox),
# and a compatible `cph` binary named by platform.env. The service installer
# provisions the dedicated non-root identity and persistent directories.
# Use a dedicated `deploy` user that has passwordless sudo for systemctl and
# writing /etc/systemd/system/cph-hub.service through deploy/install_service.sh.
set -euo pipefail

HOST="${PLATFORM_DEPLOY_HOST:?PLATFORM_DEPLOY_HOST required}"
SSH_KEY="${PLATFORM_DEPLOY_SSH_KEY:?PLATFORM_DEPLOY_SSH_KEY required}"
DEPLOY_USER="${PLATFORM_DEPLOY_USER:-deploy}"
PORT="${PLATFORM_DEPLOY_PORT:-22}"
BASE="${PLATFORM_DEPLOY_BASE:-/srv/curriculum-project-hub}"
HEALTH_URL="${PLATFORM_DEPLOY_HEALTH_URL:-http://127.0.0.1:8788/api/healthz}"
HUB_DIR="$BASE/hub"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"

SSH_OPTS=(-i "$SSH_KEY" -p "$PORT" -o StrictHostKeyChecking=accept-new)

ssh "${SSH_OPTS[@]}" "$DEPLOY_USER@$HOST" "mkdir -p '$HUB_DIR'"

# 1. Rsync the hub/ directory (exclude node_modules/dist, they rebuild on host).
rsync -az --delete \
  --exclude node_modules --exclude dist --exclude .env \
  -e "ssh ${SSH_OPTS[*]}" \
  "$REPO_ROOT/hub/" "$DEPLOY_USER@$HOST:$HUB_DIR/"

# 2. Install deps, prove the production dependency tree, then build on the host.
ssh "${SSH_OPTS[@]}" "$DEPLOY_USER@$HOST" "cd '$HUB_DIR' && npm ci && npm run audit:production && npm run build"

# 3. Ensure the service is installed (idempotent), then restart.
ssh "${SSH_OPTS[@]}" "$DEPLOY_USER@$HOST" "
  set -euo pipefail
  if [ \"\$(id -u)\" = \"0\" ]; then
    BASE='$BASE' HUB_DIR='$HUB_DIR' bash '$HUB_DIR/deploy/install_service.sh'
    systemctl restart cph-hub.service
    systemctl is-active --quiet cph-hub.service
  else
    sudo -n BASE='$BASE' HUB_DIR='$HUB_DIR' bash '$HUB_DIR/deploy/install_service.sh'
    sudo -n systemctl restart cph-hub.service
    sudo -n systemctl is-active --quiet cph-hub.service
  fi
  for attempt in \$(seq 1 30); do
    if curl --fail --silent '$HEALTH_URL' >/dev/null 2>&1; then
      exit 0
    fi
    sleep 1
  done
  curl --fail --silent --show-error '$HEALTH_URL' >/dev/null
"

echo "Deployed cph-hub to $HOST ($HUB_DIR)"