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

require_var() {
  local name="$1"
  if [ -z "${!name:-}" ]; then
    printf 'Required environment variable %s is missing\n' "$name" >&2
    exit 2
  fi
}

quote() {
  printf '%q' "$1"
}

require_var SWARM_MANAGER_HOST
require_var SWARM_SSH_USER
require_var ENVIRONMENT
require_var STACK_NAME
require_var RELEASE_ID
require_var COMMIT_SHA
require_var WEB_IMAGE
require_var PUBLIC_HOST
require_var TRAEFIK_NETWORK

SSH_PORT="${SWARM_SSH_PORT:-22}"
SSH_TARGET="${SWARM_SSH_USER}@${SWARM_MANAGER_HOST}"
REMOTE_DEPLOY_DIR="${REMOTE_DEPLOY_DIR:-/tmp/videoreg-deploy}"

ssh -p "$SSH_PORT" "$SSH_TARGET" "mkdir -p $(quote "$REMOTE_DEPLOY_DIR")"
scp -P "$SSH_PORT" deploy/swarm/docker-stack.yml "$SSH_TARGET:$REMOTE_DEPLOY_DIR/docker-stack.yml"
scp -P "$SSH_PORT" deploy/remote/deploy-stack.sh "$SSH_TARGET:$REMOTE_DEPLOY_DIR/deploy-stack.sh"

remote_vars=(
  ENVIRONMENT STACK_NAME RELEASE_ID COMMIT_SHA WEB_IMAGE PUBLIC_HOST TRAEFIK_NETWORK
  REGION TEAM_ID WEB_REPLICAS WEB_PLACEMENT_CONSTRAINT TRAEFIK_ENTRYPOINTS TRAEFIK_TLS REGISTRY REGISTRY_USERNAME REGISTRY_PASSWORD
  RELEASE_LOCK_FILE REMOTE_DEPLOY_DIR DEPLOY_MIN_FREE_MB DEPLOY_PRUNE_BEFORE_PULL DEPLOY_PRUNE_UNTIL
  DEPLOY_CLEANUP_FAILED_IMAGES VIDEOREG_DB_MEMORY_TTL_MS VIDEOREG_NEXT_CACHE_REVALIDATE_SECONDS
)

remote_command=""
for name in "${remote_vars[@]}"; do
  if [ -n "${!name:-}" ]; then
    remote_command+="$name=$(quote "${!name}") "
  fi
done
remote_command+="bash $(quote "$REMOTE_DEPLOY_DIR/deploy-stack.sh")"

ssh -p "$SSH_PORT" "$SSH_TARGET" "$remote_command"