# 🚀 AccManager Backend - Complete Setup Guide

## ⚠️ Pre-requisites

### 1. Install Node.js & npm

**Download từ:** https://nodejs.org/  
**Khuyến khích:** LTS version (v18 hoặc mới hơn)

#### Kiểm tra installation:
```bash
node --version
npm --version
```

Expected output:
```
v18.* (or newer)
9.* (or newer)
```

### 2. Verify SQL Server Connection

Trước khi chạy backend, kiểm tra SQL Server:

```bash
ping 172.20.235.176
```

Nếu không ping được, kiểm tra:
- SQL Server đang chạy
- Firewall cho phép port 1433
- Network connectivity

---

## 📥 Setup Steps

### Step 1: Install Node Packages

```bash
cd d:\RoboticsSource\AccManager
npm install
```

Wait cho tới khi mô tả xuất hiện `added X packages`

### Step 2: Run Backend Server

```bash
npm start
```

**Expected Output:**
```
========================================
AccManager Backend Server
========================================
✓ Server running on http://localhost:3000
✓ Database: AccManager
✓ Default admin: admin / admin

API Endpoints:
  POST   /api/auth/login
  GET    /api/database/info
  GET    /api/users
  GET    /api/applications
  GET    /api/accounts/user/:userId
========================================
```

### Step 3: Test Connection

Mở terminal mới, chạy:

```bash
curl http://localhost:3000/api/health
```

**Response:**
```json
{
  "status": "OK",
  "database": "Connected"
}
```

### Step 4: Test Database Info

```bash
curl http://localhost:3000/api/database/info
```

---

## 📝 Database Structure

### Database Name: `AccManager`

#### Tables:
1. **Users** (1 admin account)
   - Username: admin
   - Password: admin
   - Role: admin

2. **Applications** (4 sample apps)
   - AWS
   - GitHub
   - Google Workspace
   - Nginx Proxy

3. **Accounts** (empty, ready to use)

4. **AuditLog** (empty, for logging)

---

## 🧪 Test API Endpoints

### Test 1: Login
```bash
curl -X POST http://localhost:3000/api/auth/login \
  -H "Content-Type: application/json" \
  -d "{\"username\":\"admin\",\"password\":\"admin\"}"
```

### Test 2: Get Users
```bash
curl http://localhost:3000/api/users
```

### Test 3: Get Applications
```bash
curl http://localhost:3000/api/applications
```

### Test 4: View Database Info
```bash
curl http://localhost:3000/api/database/info
```

---

## 🔌 Frontend Integration

Update your frontend to connect to the backend:

### Option 1: Update app.js

```javascript
const API_URL = 'http://localhost:3000/api';

// Update login function
async function login(username, password) {
  const response = await fetch(`${API_URL}/auth/login`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ username, password })
  });
  const data = await response.json();
  
  if (data.success) {
    localStorage.setItem('currentUser', JSON.stringify(data.user));
    window.location.href = './pages/accounts.html';
  } else {
    alert('Login failed: ' + data.message);
  }
}

// Update get accounts function
async function getAccounts(userId) {
  const response = await fetch(`${API_URL}/accounts/user/${userId}`);
  const data = await response.json();
  return data.data || [];
}
```

---

## 📦 Project Structure

```
d:\RoboticsSource\AccManager\
├── server.js              # Backend server (Node.js)
├── package.json           # Dependencies
├── .env                   # Configuration
├── DATABASE_SETUP.md      # This file
├── database/
│   └── setup.sql         # SQL setup script
├── index.html            # Frontend entry
├── pages/
│   ├── login.html
│   ├── accounts.html
│   ├── applications.html
│   └── index.html
└── js/
    └── app.js            # Frontend logic
```

---

## 🔒 Security Notes

⚠️ **For Development Only:**
- Admin password is hardcoded as "admin"
- SQL credentials in code (not recommended for production)
- CORS enabled for all origins

### For Production:
1. Use environment variables
2. Hash passwords with bcrypt
3. Implement JWT authentication
4. Use firewalls and VPNs
5. Enable SSL/TLS

---

## 🐛 Troubleshooting

### Error: "Cannot find module 'express'"
```bash
npm install
```

### Error: "Connection failed"
Check:
- SQL Server running
- IP address correct: 172.20.235.176
- Port 1433 accessible
- Username/password correct

### Error: "Port 3000 already in use"
```bash
# Change port in .env
PORT=3001

# Then restart server
npm start
```

### Error: "CORS error in browser"
This is normal during development. The backend already has CORS enabled.

---

## 📊 Database Credentials

```
Server: 172.20.235.176
Database: AccManager
User: sa
Password: robotics@2020
```

---

## ✅ Verification Checklist

- [ ] Node.js installed
- [ ] npm packages installed (`npm install`)
- [ ] Backend server running (`npm start`)
- [ ] Can access http://localhost:3000/api/health
- [ ] Can login with admin/admin
- [ ] Database shows tables and statistics
- [ ] Frontend connects to backend

---

## 📚 Additional Commands

### Install Development Tools
```bash
npm install -D nodemon
npm run dev    # Auto-restart on code changes
```

### Check npm packages
```bash
npm list
```

### Update packages
```bash
npm update
```

### Clear npm cache
```bash
npm cache clean --force
```

---

**For Support:** Check server logs for error messages