#!/usr/bin/env bash

set -euo pipefail

ROOT_DIR="/workspaces/${localWorkspaceFolderBasename:-$(basename "$PWD")}"

SERVER_DIR="$ROOT_DIR/mern/server"

CLIENT_DIR="$ROOT_DIR/mern/client"

CONFIG_FILE="$SERVER_DIR/config.env"

ATLAS_URI_VALUE="${ATLAS_URI:-mongodb://localhost:27017/}"

PORT_VALUE="${PORT:-5050}"

ensure_config() {

cat > "$CONFIG_FILE" <<EOF

ATLAS_URI=$ATLAS_URI_VALUE

PORT=$PORT_VALUE

EOF

echo "Wrote $CONFIG_FILE with ATLAS_URI and PORT."

}

wait_for_mongodb() {

local max_tries=60

local try=1

# Atlas Local uses a replica set — wait until a writable primary is elected,

# not just until mongod responds to ping (which happens before primary election).

until node --input-type=module -e "

import { MongoClient } from 'mongodb';

const c = new MongoClient(process.env.ATLAS_URI);

await c.connect();

const h = await c.db('admin').command({ hello: 1 });

await c.close();

if (!h.isWritablePrimary) throw new Error('no primary yet');

" >/dev/null 2>&1; do

if (( try >= max_tries )); then

echo "MongoDB primary did not become ready in time."

return 1

fi

echo "Waiting for MongoDB primary... ($try/$max_tries)"

try=$((try + 1))

sleep 2

done

echo "MongoDB primary is ready."

}

start_server_if_needed() {

if pgrep -f "node --env-file=config.env server" >/dev/null; then

echo "Express server already running."

return

fi

(

cd "$SERVER_DIR"

nohup npm start > /tmp/mern-server.log 2>&1 &

)

echo "Started Express server (log: /tmp/mern-server.log)."

}

start_client_if_needed() {

if pgrep -f "vite" >/dev/null; then

echo "Vite dev server already running."

return

fi

(

cd "$CLIENT_DIR"

nohup npm run dev -- --host 0.0.0.0 > /tmp/mern-client.log 2>&1 &

)

echo "Started Vite dev server (log: /tmp/mern-client.log)."

}

ensure_config

wait_for_mongodb

echo "Codespaces startup complete."