# N8N Configuration Fix - Environment Variables & Webhook Activation

## 🔍 Problems Identified

Based on your error logs, there are **THREE critical issues**:

1. ❌ **N8N_API_KEY is not set in environment variables**
2. ❌ **404 Error**: Webhook "mission-created" is not registered (workflow not active)
3. ❌ **500 Error**: "Error in workflow" (workflow is running but failing)

---

## ✅ Fix 1: Set N8N_API_KEY Environment Variable

### Problem
```
N8N_API_KEY is not set in environment variables
```

### Solution

**Add to your `.env` or `.env.local` file**:

```env
N8N_API_KEY=LwgeE1ntADD20OuWC88S3pR0EaO7FtO4
```

**Or if using a different key**, use your actual N8N API key.

### Where to Add

1. **Local Development** (`.env.local`):
   ```env
   N8N_API_KEY=your-actual-api-key-here
   ```

2. **Production** (environment variables in your hosting platform):
   - Vercel: Settings → Environment Variables
   - Docker: `docker-compose.yml` or `.env` file
   - CapRover: App Settings → App Configs → Environment Variables

### Verify It's Set

After adding, restart your application and check logs. You should **NOT** see:
```
N8N_API_KEY is not set in environment variables
```

---

## ✅ Fix 2: Activate N8N Workflow

### Problem
```
404 Error: The requested webhook "mission-created" is not registered.
Hint: Click the 'Execute workflow' button on the canvas, then try again.
```

### Solution

**In N8N Interface**:

1. **Open your workflow** in N8N (the one with the webhook node)
2. **Click "Active" toggle** in the top right to activate the workflow
   - The toggle should be **GREEN/ON** ✅
   - If it's gray/off, click it to activate

3. **Verify the webhook node**:
   - The webhook node should show as "Active"
   - The webhook path should be: `mission-created`
   - The full URL should be: `https://brain.slm-lab.net/webhook/mission-created`

### Alternative: Test Mode

If you're testing:
1. Click **"Execute Workflow"** button on the canvas
2. This activates the webhook for **one test call**
3. After the test, activate the workflow permanently

### Verify Webhook is Active

**Test the webhook URL**:
```bash
curl -X POST https://brain.slm-lab.net/webhook/mission-created \
  -H "Content-Type: application/json" \
  -d '{"test": "data"}'
```

**Expected**:
- If active: Should trigger the workflow (may return error if data is invalid, but should not be 404)
- If not active: Returns 404 with message about webhook not registered

---

## ✅ Fix 3: Fix Workflow Errors (500 Error)

### Problem
```
500 Error: {"message":"Error in workflow"}
```

This means the workflow is running but encountering an error. Common causes:

### Common Issues & Fixes

#### Issue 3.1: Missing missionId in Process Mission Data

**Check**: The "Process Mission Data" node should include `missionId` in its output.

**Fix**: Ensure the node includes:
```javascript
missionId: missionData?.missionId || missionData?.body?.missionId
```

#### Issue 3.2: Incorrect URL in Save Mission To API Node

**Check**: The "Save Mission To API" node URL should be:
```
{{ $node['Process Mission Data'].json.config.MISSION_API_URL }}/api/missions/mission-created
```

**NOT**:
```
{{ $node['Process Mission Data'].json.config.MISSION_API_URL + '/mission-created' }}
```

#### Issue 3.3: Missing missionId in Save Mission To API Body

**Check**: The "Save Mission To API" node body should include:
- Parameter: `missionId`
- Value: `{{ $node['Process Mission Data'].json.missionId }}`

#### Issue 3.4: API Key Mismatch

**Check**: The API key in the "Save Mission To API" node header should match your `N8N_API_KEY` environment variable.

**Fix**: Use:
```
{{ $node['Process Mission Data'].json.config.N8N_API_KEY }}
```

### Debug Workflow Errors

1. **Check N8N Execution Logs**:
   - Go to N8N → Executions
   - Find the failed execution
   - Click on it to see which node failed
   - Check the error message

2. **Test Each Node Individually**:
   - Execute the workflow step by step
   - Check each node's output
   - Verify data is flowing correctly

---

## 📋 Complete Checklist

### Environment Variables
- [ ] `N8N_API_KEY` is set in `.env.local` or production environment
- [ ] Value matches the API key used in N8N workflow
- [ ] Application has been restarted after adding the variable

### N8N Workflow Configuration
- [ ] Workflow is **ACTIVE** (green toggle in N8N)
- [ ] Webhook path is: `mission-created`
- [ ] Webhook URL is: `https://brain.slm-lab.net/webhook/mission-created`
- [ ] "Process Mission Data" node includes `missionId` in output
- [ ] "Save Mission To API" node URL is correct: `{{ MISSION_API_URL }}/api/missions/mission-created`
- [ ] "Save Mission To API" node includes `missionId` in body parameters
- [ ] "Save Mission To API" node includes `x-api-key` header with correct value

### Testing
- [ ] Test webhook URL returns 200 (not 404)
- [ ] Create a test mission
- [ ] Check N8N execution logs for errors
- [ ] Verify mission IDs are saved to database after creation

---

## 🧪 Step-by-Step Testing

### Step 1: Verify Environment Variable

```bash
# In your terminal (if running locally)
echo $N8N_API_KEY

# Or check in your application logs
# Should NOT see: "N8N_API_KEY is not set in environment variables"
```

### Step 2: Test Webhook is Active

```bash
curl -X POST https://brain.slm-lab.net/webhook/mission-created \
  -H "Content-Type: application/json" \
  -d '{"test": "data"}'
```

**Expected Results**:
- ✅ **200/400/500 with workflow error**: Webhook is active (workflow may fail due to invalid data, but webhook is registered)
- ❌ **404 with "webhook not registered"**: Webhook is NOT active → Activate workflow in N8N

### Step 3: Test Mission Creation

1. Create a mission via your frontend
2. Check server logs - should NOT see:
   - ❌ "N8N_API_KEY is not set"
   - ❌ "404 webhook not registered"
3. Check N8N execution logs - should see successful execution
4. Check database - mission should have integration IDs saved

---

## 🔧 Quick Fix Commands

### Add N8N_API_KEY to .env.local

```bash
# Add to .env.local file
echo "N8N_API_KEY=LwgeE1ntADD20OuWC88S3pR0EaO7FtO4" >> .env.local

# Restart your development server
# npm run dev
# or
# yarn dev
```

### Verify Environment Variable is Loaded

Create a test endpoint to verify:

```typescript
// app/api/test-n8n-config/route.ts
import { NextResponse } from 'next/server';

export async function GET() {
  return NextResponse.json({
    hasN8NApiKey: !!process.env.N8N_API_KEY,
    n8nWebhookUrl: process.env.N8N_WEBHOOK_URL || 'https://brain.slm-lab.net/webhook/mission-created',
    missionApiUrl: process.env.NEXT_PUBLIC_API_URL
  });
}
```

Then visit: `http://localhost:3000/api/test-n8n-config`

---

## 📝 Summary of Fixes

1. **Add `N8N_API_KEY` to environment variables**
   - File: `.env.local` (development) or production environment
   - Value: Your actual N8N API key
   - Restart application after adding

2. **Activate N8N Workflow**
   - Open workflow in N8N
   - Click "Active" toggle (should be green/on)
   - Verify webhook is registered

3. **Fix Workflow Configuration**
   - Ensure "Save Mission To API" URL is correct
   - Ensure `missionId` is included in body
   - Check N8N execution logs for specific errors

---

## 🚨 If Still Not Working

### Check N8N Execution Logs

1. Go to N8N → Executions
2. Find the latest failed execution
3. Click on it
4. Check which node failed
5. Look at the error message
6. Fix the specific issue

### Common Additional Issues

- **Network connectivity**: N8N can't reach your API
- **CORS issues**: If calling from browser
- **Authentication**: API key mismatch
- **Data format**: Body parameters don't match expected format

---

**Document Created**: $(date)
**Priority**: CRITICAL - Blocks mission creation