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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR"

DOCKER_CMD=()
SECRETS_FILE="$SCRIPT_DIR/.mongo-secrets.env"
MONGO_VOLUME_NAME="$(basename "$SCRIPT_DIR" | tr '[:upper:]' '[:lower:]')_mongo_data"

ensure_mongo_secrets() {
	if [ -f "$SECRETS_FILE" ]; then
		# shellcheck disable=SC1090
		source "$SECRETS_FILE"
	fi

	if [ -z "${MONGO_INITDB_ROOT_PASSWORD:-}" ]; then
		MONGO_INITDB_ROOT_PASSWORD="$(openssl rand -hex 24)"
	fi

	if [ -z "${MONGO_APP_PASSWORD:-}" ]; then
		MONGO_APP_PASSWORD="$(openssl rand -hex 24)"
	fi

	cat > "$SECRETS_FILE" <<EOF
MONGO_INITDB_ROOT_USERNAME=${MONGO_INITDB_ROOT_USERNAME:-website_root}
MONGO_INITDB_ROOT_PASSWORD=$MONGO_INITDB_ROOT_PASSWORD
MONGO_APP_USER=${MONGO_APP_USER:-website_app}
MONGO_APP_PASSWORD=$MONGO_APP_PASSWORD
EOF
	chmod 600 "$SECRETS_FILE"
	# shellcheck disable=SC1090
	source "$SECRETS_FILE"
	export MONGO_INITDB_ROOT_USERNAME MONGO_INITDB_ROOT_PASSWORD MONGO_APP_USER MONGO_APP_PASSWORD
}

resolve_docker_cmd() {
	if docker info >/dev/null 2>&1; then
		DOCKER_CMD=(docker)
		return 0
	fi

	if sudo -n docker info >/dev/null 2>&1; then
		DOCKER_CMD=(sudo docker)
		return 0
	fi

	if command -v sudo >/dev/null 2>&1 && [ -t 0 ]; then
		echo "Docker-Zugriff ohne Gruppe erkannt. Verwende sudo docker (ggf. Passwortabfrage)."
		if sudo docker info >/dev/null 2>&1; then
			DOCKER_CMD=(sudo docker)
			return 0
		fi
	fi

	echo "[FEHLER] Kein Zugriff auf den Docker Daemon (/var/run/docker.sock)." >&2
	echo "Führe das Script mit sudo aus oder füge deinen User zur docker-Gruppe hinzu:" >&2
	echo "  sudo usermod -aG docker $USER" >&2
	echo "Danach neu einloggen und Script erneut starten." >&2
	exit 3
}

export SESSION_COOKIE_SECURE="0"
export INSTANCE_TLS_MODE="development"
export INSTANCE_PARENT_DOMAIN="${INSTANCE_PARENT_DOMAIN:-meine-domain}"
export DEV_HOSTS_REFRESH_INTERVAL="${DEV_HOSTS_REFRESH_INTERVAL:-30}"

echo "Launching WEBSITE stack"
echo "  SESSION_COOKIE_SECURE=$SESSION_COOKIE_SECURE"
echo "  INSTANCE_TLS_MODE=$INSTANCE_TLS_MODE"
echo "  INSTANCE_PARENT_DOMAIN=$INSTANCE_PARENT_DOMAIN"
echo "  DEV_HOSTS_REFRESH_INTERVAL=$DEV_HOSTS_REFRESH_INTERVAL"

ensure_mongo_secrets

# Ensure required runtime files exist before building
if [ ! -f "$SCRIPT_DIR/gunicorn.conf.py" ]; then
	echo "[FEHLER] gunicorn.conf.py fehlt in $SCRIPT_DIR. Bitte prüfen." >&2
	exit 2
fi

resolve_docker_cmd

"${DOCKER_CMD[@]}" compose --env-file "$SECRETS_FILE" build website

mongo_bootstrap_needed() {
	"${DOCKER_CMD[@]}" compose --env-file "$SECRETS_FILE" exec -T mongodb mongosh --quiet --username "$MONGO_INITDB_ROOT_USERNAME" --password "$MONGO_INITDB_ROOT_PASSWORD" --authenticationDatabase admin --eval 'db.adminCommand({ ping: 1 }).ok' >/dev/null 2>&1
}

bootstrap_mongo_users() {
	echo "MongoDB bootstrap erforderlich; starte temporären Recovery-Modus ohne Auth..."
	"${DOCKER_CMD[@]}" compose --env-file "$SECRETS_FILE" stop mongodb || true
	"${DOCKER_CMD[@]}" run -d --rm \
		--name invario-mongo-recovery \
		--network host \
		-v "${MONGO_VOLUME_NAME}:/data/db" \
		mongo:7 \
		mongod --dbpath /data/db --bind_ip 127.0.0.1 --port 27017 --noauth >/dev/null

	trap '"${DOCKER_CMD[@]}" stop invario-mongo-recovery >/dev/null 2>&1 || true' EXIT

	for _ in 1 2 3 4 5 6 7 8 9 10; do
		if "${DOCKER_CMD[@]}" run --rm --network host mongo:7 mongosh --quiet mongodb://127.0.0.1:27017 --eval 'db.adminCommand({ ping: 1 }).ok' >/dev/null 2>&1; then
			break
		fi
		sleep 1
	done

	"${DOCKER_CMD[@]}" run --rm --network host --env-file "$SECRETS_FILE" mongo:7 mongosh --quiet mongodb://127.0.0.1:27017 --eval '
const appDatabase = process.env.MONGO_DB_NAME || "Invario_Website";
const rootUser = process.env.MONGO_INITDB_ROOT_USERNAME || "website_root";
const rootPassword = process.env.MONGO_INITDB_ROOT_PASSWORD;
const appUser = process.env.MONGO_APP_USER || "website_app";
const appPassword = process.env.MONGO_APP_PASSWORD;

if (!rootPassword || !appPassword) {
	throw new Error("Missing Mongo bootstrap credentials");
}

const adminDb = db.getSiblingDB("admin");
try {
	adminDb.createUser({
		user: rootUser,
		pwd: rootPassword,
		roles: [{ role: "root", db: "admin" }],
	});
} catch (error) {
	if (!String(error).includes("already exists")) {
		throw error;
	}
}

const appDb = db.getSiblingDB(appDatabase);
try {
	appDb.createUser({
		user: appUser,
		pwd: appPassword,
		roles: [{ role: "readWrite", db: appDatabase }],
	});
} catch (error) {
	if (!String(error).includes("already exists")) {
		throw error;
	}
}
'

	"${DOCKER_CMD[@]}" stop invario-mongo-recovery >/dev/null
	trap - EXIT
	echo "MongoDB bootstrap abgeschlossen. Starte gesicherten Dienst erneut..."
}

if ! mongo_bootstrap_needed; then
	bootstrap_mongo_users
fi

"${DOCKER_CMD[@]}" compose --env-file "$SECRETS_FILE" up -d mongodb
"${DOCKER_CMD[@]}" compose --env-file "$SECRETS_FILE" up -d --no-deps website

# Wait for website to become healthy (simple HTTP check)
check_url="http://localhost:4999"
timeout_seconds=60
interval=2
elapsed=0

echo "Warte auf Website (${check_url}) bis ${timeout_seconds}s..."
while [ $elapsed -lt $timeout_seconds ]; do
	if curl -sS --max-time 2 "$check_url" >/dev/null 2>&1; then
		echo "Website erreichbar nach ${elapsed}s"
		break
	fi
	sleep $interval
	elapsed=$((elapsed + interval))
done

if [ $elapsed -ge $timeout_seconds ]; then
	echo "[FEHLER] Website nicht erreichbar nach ${timeout_seconds}s. Sammle Diagnosedaten..."
	echo "--- docker compose ps ---"
	"${DOCKER_CMD[@]}" compose --env-file "$SECRETS_FILE" ps || true
	echo "--- docker logs website (tail 200) ---"
	"${DOCKER_CMD[@]}" logs --tail 200 website-website-1 || true
	echo "Bitte prüfe Container-Logs und nginx-Konfiguration."
fi

echo "Website stack is running on http://localhost:4999"
echo "Provisioning creates self-signed certs per subdomain when needed."