# /product-finder Deployment Fix Guide

## 🔴 Problem

The application works locally at `http://localhost:8080/` but fails on the server at `https://columbiawindows.com/product-finder/`.

The redirect from `/product-finder` → `/product-finder/login` works, but then the login page or subsequent routes fail.

## ✅ Solution Applied

Three critical changes were made to fix subdirectory deployment:

### 1. **Added PrefixMiddleware to app.py**

This middleware tells Flask about the `/product-finder` prefix by setting `SCRIPT_NAME` in the WSGI environment:

```python
class PrefixMiddleware:
    """Middleware to handle subdirectory deployments"""
    def __init__(self, app, prefix=''):
        self.app = app
        self.prefix = prefix.rstrip('/')
        
    def __call__(self, environ, start_response):
        if self.prefix and self.prefix != '/':
            path = environ.get('PATH_INFO', '')
            script_name = environ.get('SCRIPT_NAME', '')
            
            if not script_name.startswith(self.prefix):
                environ['SCRIPT_NAME'] = self.prefix + script_name
                if path.startswith(self.prefix):
                    environ['PATH_INFO'] = path[len(self.prefix):]
        
        return self.app(environ, start_response)
```

This is automatically applied when `APPLICATION_ROOT` is set.

### 2. **Updated passenger_wsgi.py**

Sets the `APPLICATION_ROOT` environment variable before importing the app:

```python
if 'APPLICATION_ROOT' not in os.environ:
    os.environ['APPLICATION_ROOT'] = '/product-finder'
```

### 3. **Updated config.py**

Production configuration now defaults to `/product-finder`:

```python
class ProductionConfig(Config):
    APPLICATION_ROOT = os.environ.get('APPLICATION_ROOT', '/product-finder')
```

Development still uses `/` for local testing.

## 📤 Files to Upload

Upload these updated files to your server:

1. **`app/app.py`** - Contains PrefixMiddleware
2. **`app/passenger_wsgi.py`** - Sets APPLICATION_ROOT env var
3. **`app/config.py`** - Production defaults to /product-finder
4. **`app/.htaccess`** - Apache configuration (new file)
5. **All template files** - Already updated with url_for() and BASE_URL

## 🔧 Server Configuration

### Option A: Using .htaccess (Recommended)

The `.htaccess` file is already configured for `/product-finder`. Upload it to your `app/` folder on the server.

**Important:** Update these lines in `.htaccess`:
```apache
PassengerAppRoot /home/USERNAME/public_html/product-finder
PassengerPython /usr/bin/python3  # Update to your Python path
```

### Option B: Apache Virtual Host Configuration

If you have access to Apache config, add this to your virtual host:

```apache
<Directory "/home/USERNAME/public_html/product-finder">
    SetEnv APPLICATION_ROOT /product-finder
    PassengerEnabled on
    PassengerAppRoot /home/USERNAME/public_html/product-finder
    PassengerPython /usr/bin/python3
    Allow from all
    Options -MultiViews
</Directory>
```

## 🚀 Deployment Steps

1. **Backup Current Installation**
   ```bash
   mv product-finder product-finder.backup
   ```

2. **Upload Updated Files**
   - Upload entire `app/` folder to server
   - Or just upload the 5 changed files listed above

3. **Restart Passenger**
   ```bash
   # In product-finder folder
   mkdir -p tmp
   touch tmp/restart.txt
   ```

4. **Test the Application**
   - Go to: `https://columbiawindows.com/product-finder/`
   - Should redirect to: `https://columbiawindows.com/product-finder/login`
   - Login page should load with all CSS/JS
   - Login should work and redirect properly
   - All routes should work: `/product-finder/users`, etc.

## 🐛 Troubleshooting

### Issue: Still getting 404 on login page

**Check server error logs:**
```bash
tail -f ~/logs/error_log  # or wherever your error logs are
```

**Verify APPLICATION_ROOT is set:**
Add this test route to app.py temporarily:
```python
@app.route('/debug-config')
def debug_config():
    return jsonify({
        'APPLICATION_ROOT': app.config.get('APPLICATION_ROOT'),
        'script_root': request.script_root,
        'url_root': request.url_root,
        'base_url': request.base_url
    })
```

Then visit: `https://columbiawindows.com/product-finder/debug-config`

**Expected response:**
```json
{
  "APPLICATION_ROOT": "/product-finder",
  "script_root": "/product-finder",
  "url_root": "https://columbiawindows.com/product-finder/",
  "base_url": "https://columbiawindows.com/product-finder/debug-config"
}
```

### Issue: CSS/JS files not loading

**Check that routes are working:**
- Visit: `https://columbiawindows.com/product-finder/css/styles.css`
- Should return CSS file, not 404

**Check .htaccess MIME types:**
Ensure these lines are in `.htaccess`:
```apache
AddType text/css .css
AddType application/javascript .js
AddType application/json .json
```

### Issue: Login works but redirects are wrong

**Check redirect code in templates:**
All JavaScript should use `BASE_URL`:
```javascript
const BASE_URL = '{{ base_url }}';
window.location.href = BASE_URL + '/login';
```

All Python redirects should use `url_for()`:
```python
return redirect(url_for('login_page'))
```

### Issue: Works locally, fails on server

**Verify environment:**
```bash
# SSH to server
cd ~/public_html/product-finder
python3 -c "import os; print(os.environ.get('APPLICATION_ROOT', 'NOT SET'))"
```

Should print: `/product-finder`

**Check Passenger is using correct Python:**
```bash
which python3
# Use this path in PassengerPython directive
```

### Issue: Sessions not persisting

**Check SECRET_KEY:**
```python
# In config.py, production should have a fixed SECRET_KEY
SECRET_KEY = 'your-fixed-secret-key-here'  # Don't use secrets.token_hex() in production
```

**Check cookie settings:**
Session cookies need to work with the subdirectory path.

### Issue: API calls return 404

**Check browser console:**
Press F12, go to Network tab, and check the actual URLs being called.

**Should see:**
```
https://columbiawindows.com/product-finder/api/login
https://columbiawindows.com/product-finder/api/session
```

**If you see:**
```
https://columbiawindows.com/api/login  ❌ Missing prefix
```

Then `BASE_URL` is not set correctly in template.

## ✅ Verification Checklist

After deployment, test these in order:

- [ ] Visit `https://columbiawindows.com/product-finder/`
  - Should redirect to `/product-finder/login` ✓
  
- [ ] Login page loads
  - CSS styled correctly ✓
  - No 404s in browser console ✓
  
- [ ] Login with Master/Master
  - Should redirect to `/product-finder/select-location` ✓
  
- [ ] Select a location
  - Should redirect to `/product-finder/` ✓
  
- [ ] User info shows in header ✓

- [ ] Click "User Management" (if Master user)
  - Should go to `/product-finder/users` ✓
  
- [ ] Logout
  - Should return to `/product-finder/login` ✓

## 📝 Key Points

1. **The middleware is critical** - It tells Flask about the `/product-finder` prefix
2. **passenger_wsgi.py sets the env var** - Before importing the app
3. **All templates use BASE_URL** - For JavaScript fetch calls
4. **All routes use url_for()** - For Python redirects
5. **Production config defaults to /product-finder** - Development stays at /

## 🔄 Rolling Back

If something goes wrong:

```bash
# Remove new files
rm -rf product-finder

# Restore backup
mv product-finder.backup product-finder

# Restart Passenger
touch product-finder/tmp/restart.txt
```

## 📞 Still Having Issues?

Run this diagnostic script on the server:

```python
# Save as test_deployment.py in product-finder folder
import os
import sys

print("=" * 60)
print("DEPLOYMENT DIAGNOSTIC")
print("=" * 60)
print(f"Python Version: {sys.version}")
print(f"Current Directory: {os.getcwd()}")
print(f"APPLICATION_ROOT env: {os.environ.get('APPLICATION_ROOT', 'NOT SET')}")
print()

try:
    os.environ['APPLICATION_ROOT'] = '/product-finder'
    from app import app
    print("✓ App imported successfully")
    print(f"APPLICATION_ROOT config: {app.config.get('APPLICATION_ROOT')}")
    print(f"Middleware applied: {'PrefixMiddleware' in str(type(app.wsgi_app))}")
except Exception as e:
    print(f"✗ Error importing app: {e}")
    import traceback
    traceback.print_exc()
```

Run with: `python3 test_deployment.py`

## 🎯 Expected Behavior

**Before these changes:**
- Redirect works: `/product-finder` → `/product-finder/login` ✓
- Login page loads BUT Flask doesn't know about `/product-finder` prefix
- All `url_for()` calls generate `/login` instead of `/product-finder/login` ❌
- Result: 404 errors on subpages

**After these changes:**
- Flask knows it's at `/product-finder` via middleware ✓
- All `url_for()` generates `/product-finder/login` ✓
- All templates use `BASE_URL = '/product-finder'` ✓
- Result: Everything works ✓

## 🆘 Quick Fix Checklist

If deployed and not working:

1. [ ] Uploaded `app/app.py` with PrefixMiddleware?
2. [ ] Uploaded `app/passenger_wsgi.py` with env var setting?
3. [ ] Uploaded `app/.htaccess` with SetEnv directive?
4. [ ] Ran `touch tmp/restart.txt` to restart Passenger?
5. [ ] Checked error logs for Python errors?
6. [ ] Tested `/product-finder/debug-config` route?
7. [ ] Verified cookies are being set (F12 > Application > Cookies)?

If all checked and still failing, check server error logs for the actual Python error.