# @awell-health/navi-js

> Navi.js loading utility - loads the Navi SDK from CDN (like @stripe/stripe-js)

## Architecture Overview

This package follows the **Stripe.js model** for security, performance, and compliance:

- ✅ **CDN-only distribution** - Must load from `https://cdn.awellhealth.com`
- ✅ **Version pinning** - Each npm package version pins to specific CDN version
- ✅ **Security compliance** - Cannot bundle or self-host (like Stripe for PCI compliance)
- ✅ **Global caching** - CDN provides optimal performance worldwide

## Installation

```bash
npm install @awell-health/navi-js
```

## Basic Usage

```typescript
import { loadNavi } from "@awell-health/navi-js";

// Load Navi SDK once at app initialization
const navi = await loadNavi("pk_test_your_key_here");

const instance = navi.renderActivities("#container", {
  pathwayId: "pathway_patient_intake",
  organizationId: "org_customer_123",
  userId: "user_patient_456",
});
```

## React Integration Pattern

```typescript
// App.tsx - Load once at app level
import { loadNavi } from "@awell-health/navi-js";
import { NaviProvider, NaviEmbed } from "@awell-health/navi-js-react";

function App() {
  const [naviLoaded, setNaviLoaded] = useState(false);

  useEffect(() => {
    // Load Navi SDK once when app starts
    loadNavi("pk_test_your_key_here", {
      origin: "https://cdn.awellhealth.com",
      embedOrigin: "http://localhost:3000", // For testing
    }).then(() => setNaviLoaded(true));
  }, []);

  if (!naviLoaded) return <div>Loading...</div>;

  return (
    <NaviProvider publishableKey="pk_test_your_key_here">
      <NaviEmbed careflowDefinitionId="flow_123" />
    </NaviProvider>
  );
}
```

## Configuration Options

You can control where the Navi SDK loads from and where embeds point to:

### Default (Production)

```typescript
// Uses CDN by default (recommended for production)
const navi = await loadNavi("pk_live_your_key_here");
// Script from: https://cdn.awellhealth.com
// Embeds to: https://navi-portal.awellhealth.com
```

### Force Local Development

```typescript
// Force local development mode
const navi = await loadNavi("pk_test_your_key_here", { local: true });
// Script from: http://localhost:3000
// Embeds to: http://localhost:3000
```

### Mixed Configuration

```typescript
// Pull script from CDN but embed to localhost (for testing)
const navi = await loadNavi("pk_test_your_key_here", {
  origin: "https://cdn.awellhealth.com", // Script from CDN
  embedOrigin: "http://localhost:3000", // Embed to local
});
```

### Custom URLs

```typescript
// Completely custom configuration
const navi = await loadNavi("pk_test_your_key_here", {
  origin: "https://custom-cdn.example.com",
  embedOrigin: "https://custom-portal.example.com",
});
```

## Production Architecture

### **🌐 CDN Distribution (`https://cdn.awellhealth.com`)**

```
https://cdn.awellhealth.com/
├── v1/navi-loader.js           ← Latest v1.x.x
├── v1.0.0/navi-loader.js       ← Specific version
├── v1.1.0/navi-loader.js       ← Specific version
└── v2/navi-loader.js           ← Future v2.x.x
```

### **🔒 Embed Portal (`https://navi-portal.awellhealth.com`)**

```
https://navi-portal.awellhealth.com/
└── [pathway_id]                ← Iframe content only
```

### **📦 NPM Wrapper (`@awell-health/navi-js`)**

```
npm install @awell-health/navi-js
└── Loads: https://cdn.awellhealth.com/v1/navi-loader.js
```

## Deployment Pipeline

### **1. navi-loader (CDN)**

```bash
# Build the IIFE bundle
cd packages/navi-loader
pnpm build
# Output: dist/navi-loader.js

# Deploy to CDN with versioning
aws s3 cp dist/navi-loader.js s3://cdn.awellhealth.com/v1.0.0/navi-loader.js
aws s3 cp dist/navi-loader.js s3://cdn.awellhealth.com/v1/navi-loader.js  # latest
```

### **2. navi-js (NPM)**

```bash
# Build the wrapper package
cd packages/navi-js
pnpm build
# Output: dist/index.js, dist/index.mjs, dist/index.d.ts

# Publish to NPM
npm publish
```

### **3. navi-portal (Embed)**

```bash
# Deploy embed-only portal
cd apps/navi-portal
pnpm build
# Deploy to: https://navi-portal.awellhealth.com
```

## Version Mapping

| **@awell-health/navi-js** | **CDN Version** | **Release Date** |
| ------------------------- | --------------- | ---------------- |
| v1.0.x                    | v1.0.0          | 2024-01-15       |
| v1.1.x                    | v1.1.0          | 2024-02-01       |
| v1.2.x                    | v1.2.0          | 2024-03-01       |

## Security Model

### **Like Stripe's PCI Compliance**

```typescript
// ❌ FORBIDDEN - Cannot bundle or self-host
import naviBundle from "./navi-loader.js"; // Not allowed!

// ✅ REQUIRED - Must load from official CDN
import { loadNavi } from "@awell-health/navi-js";
const navi = await loadNavi("pk_test_..."); // Loads from CDN
```

### **Content Security Policy**

```html
<meta
  http-equiv="Content-Security-Policy"
  content="script-src 'self' https://cdn.awellhealth.com;"
/>
```

## Development vs Production

### **Development (localhost:3000)**

```typescript
// Automatically detects development environment
const navi = await loadNavi("pk_test_demo123");
// Loads: http://localhost:3000/navi-loader.js
// Iframes: http://localhost:3000/embed/pathway_123
```

### **Production (CDN)**

```typescript
// Production automatically uses CDN
const navi = await loadNavi("pk_live_prod456");
// Loads: https://cdn.awellhealth.com/v1/navi-loader.js
// Iframes: https://navi-portal.awellhealth.com/pathway_123
```

## Customer Integration Examples

### **E-commerce Checkout**

```typescript
import { loadNavi } from "@awell-health/navi-js";

// During checkout process
const navi = await loadNavi("pk_live_xyz");
const healthScreen = navi.renderActivities("#health-screening", {
  pathwayId: "health_screening_checkout",
  organizationId: "org_ecommerce_store",
  userId: `customer_${customerId}`,
  size: "compact",
});

healthScreen.on("navi.pathway.completed", () => {
  // Continue with checkout
  proceedToPayment();
});
```

### **Patient Portal**

```typescript
import { loadNavi } from "@awell-health/navi-js";

// In patient dashboard
const navi = await loadNavi("pk_live_abc");
const dailyCheckin = navi.renderActivities("#daily-checkin", {
  pathwayId: "daily_wellness_checkin",
  organizationId: "org_hospital_123",
  userId: `patient_${patientId}`,
  size: "standard",
});
```

### **React Integration**

```tsx
import { useEffect, useState } from "react";
import { loadNavi } from "@awell-health/navi-js";

function NaviWidget({ pathwayId, userId }) {
  const [instance, setInstance] = useState(null);

  useEffect(() => {
    const init = async () => {
      const navi = await loadNavi("pk_test_demo");
      const widget = navi.renderActivities("#navi-container", {
        pathwayId,
        organizationId: "org_react_app",
        userId,
      });
      setInstance(widget);
    };

    init();

    return () => instance?.destroy();
  }, [pathwayId, userId]);

  return <div id="navi-container" />;
}
```

## CDN Configuration

### **Google Cloud CDN**

```yaml
# Deploy to Google Cloud Storage + CDN
resource: google-cloud-storage
bucket: cdn-navi-com
cdn: global
cache: 1 year
```

### **CloudFlare CDN**

```yaml
# Alternative: CloudFlare for global distribution
domain: cdn.awellhealth.com
cache: aggressive
compression: gzip, brotli
```

### **AWS CloudFront**

```yaml
# Alternative: AWS CloudFront
origin: s3://cdn-navi-com
cache-policy: optimized-caching
gzip: true
```

## Monitoring & Analytics

### **CDN Metrics**

- Request count by version
- Global latency by region
- Cache hit rates
- Error rates

### **Usage Analytics**

- Load success/failure rates
- Time to interactive
- Customer adoption by version

## Migration Guide

### **From Current Architecture**

```typescript
// OLD - Direct portal serving
<script src="http://localhost:3000/navi-loader.js"></script>

// NEW - CDN + NPM wrapper
npm install @awell-health/navi-js
import { loadNavi } from '@awell-health/navi-js';
```

### **Versioning Strategy**

1. **Major versions** - Breaking API changes
2. **Minor versions** - New features, backwards compatible
3. **Patch versions** - Bug fixes only

## Support

- 📖 [Documentation](https://docs.navi.awell.com)
- 🚀 [Migration Guide](https://docs.navi.awell.com/migration)
- 💬 [Support](https://support.awell.com)

---

## Implementation Status

- [ ] **CDN Infrastructure** - Set up Google Cloud CDN or CloudFlare
- [ ] **Deployment Pipeline** - Automate version deployment to CDN
- [ ] **Version Management** - Pin npm package versions to CDN versions
- [ ] **Environment Detection** - Auto-switch between localhost and CDN
- [ ] **Portal Separation** - Split embed routes from main portal
- [ ] **DNS Configuration** - Set up `cdn.awellhealth.com` and `navi-portal.awellhealth.com`