# Vendor Page Pagination Implementation

## 🎯 What's New

Your vendors page now includes:
1. ✅ **Edit button** - Already present (pencil icon next to view icon)
2. ✅ **Pagination** - New pagination controls at the bottom of the table

---

## 📦 Files Updated

### 1. vendors.html
**Changes:**
- Changed `x-for="vendor in vendors"` → `x-for="vendor in paginatedVendors"`
- Added pagination footer with controls
- Added "Showing X-Y of Z" results display

### 2. vendors.js
**Changes:**
- Added pagination state: `currentPage`, `itemsPerPage`
- Added computed properties:
  - `paginatedVendors` - Returns current page's vendors
  - `totalPages` - Calculates total number of pages
  - `startIndex` / `endIndex` - For "Showing X-Y" display
  - `pageNumbers` - Generates smart page number array with ellipsis
- Added pagination methods:
  - `goToPage(page)` - Navigate to specific page
  - `nextPage()` - Go to next page
  - `previousPage()` - Go to previous page

---

## 🎨 Pagination Features

### Smart Page Number Display
The pagination intelligently shows page numbers:

**Example 1: Few pages (≤7)**
```
← 1 2 3 4 5 6 7 →
```

**Example 2: Many pages, current = 1**
```
← 1 2 3 ... 9 10 →
```

**Example 3: Many pages, current = 5**
```
← 1 ... 4 5 6 ... 10 →
```

**Example 4: Many pages, current = 10**
```
← 1 ... 8 9 10 →
```

### Configurable Items Per Page
Default: 10 vendors per page

To change, edit in `vendors.js`:
```javascript
itemsPerPage: 10,  // Change this number
```

---

## 🔧 How It Works

### 1. Computed Properties (Alpine.js)
Alpine.js computes these values reactively:

```javascript
get paginatedVendors() {
    const start = (this.currentPage - 1) * this.itemsPerPage;
    const end = start + this.itemsPerPage;
    return this.vendors.slice(start, end);
}
```

When `currentPage` changes, `paginatedVendors` automatically updates!

### 2. Template Binding
The HTML template uses the computed property:
```html
<template x-for="vendor in paginatedVendors" :key="vendor.vendor_code">
    <!-- Vendor row -->
</template>
```

### 3. Pagination Controls
Buttons call the pagination methods:
```html
<button @click="previousPage()" :disabled="currentPage === 1">
<button @click="goToPage(page)">
<button @click="nextPage()" :disabled="currentPage === totalPages">
```

---

## 📊 Visual Layout

```
┌──────────────────────────────────────────────────────────┐
│ Vendor Management                      [+ Create Vendor] │
├──────────────────────────────────────────────────────────┤
│ [Total] [Verified] [Pending] [Inactive]  ← Stats Cards  │
├──────────────────────────────────────────────────────────┤
│ Vendor │ Subdomain │ Status │ Created │ Actions         │
├────────┼───────────┼────────┼─────────┼─────────────────┤
│ Acme   │ acme      │ ✓      │ Jan 1   │ 👁 ✏️ 🗑       │
│ Beta   │ beta      │ ⏰     │ Jan 2   │ 👁 ✏️ 🗑       │
│ ...    │ ...       │ ...    │ ...     │ ...             │
├──────────────────────────────────────────────────────────┤
│ Showing 1-10 of 45              ← 1 2 [3] 4 ... 9 →     │
└──────────────────────────────────────────────────────────┘
                                    ↑
                              Pagination controls
```

---

## 🎭 Action Buttons Explained

Each vendor row has 3 action buttons:

1. **View Button** (👁 Eye icon - Blue)
   - Shows vendor details
   - Calls: `viewVendor(vendor.vendor_code)`
   - Navigates to: `/admin/vendors/{code}`

2. **Edit Button** (✏️ Pencil icon - Purple) ⭐ NEW
   - Opens edit form
   - Calls: `editVendor(vendor.vendor_code)`
   - Navigates to: `/admin/vendors/{code}/edit`

3. **Delete Button** (🗑 Trash icon - Red)
   - Deletes vendor with confirmation
   - Calls: `deleteVendor(vendor)`
   - Shows confirmation dialog first

---

## 🧪 Testing the Pagination

### Test Scenarios

**Test 1: With few vendors (<10)**
- Pagination should not show if only 1 page
- All vendors visible on page 1

**Test 2: With many vendors (>10)**
- Pagination controls appear
- Can navigate between pages
- "Previous" disabled on page 1
- "Next" disabled on last page

**Test 3: Navigation**
- Click page numbers to jump to specific page
- Click "Previous" arrow to go back
- Click "Next" arrow to go forward
- Page numbers update dynamically

**Test 4: After Delete**
- Delete a vendor
- Data reloads
- Returns to page 1
- Pagination updates

---

## 🎨 Styling

The pagination uses the same Windmill theme as your dashboard:

- **Normal buttons**: Gray with hover effect
- **Current page**: Purple background (matches your theme)
- **Disabled buttons**: 50% opacity, cursor not-allowed
- **Hover effects**: Light gray background
- **Dark mode**: Full support

---

## 🔧 Customization Options

### Change Items Per Page
In `vendors.js`:
```javascript
itemsPerPage: 20,  // Show 20 vendors per page
```

### Change Page Number Display Logic
In `vendors.js`, modify the `pageNumbers` computed property:
```javascript
get pageNumbers() {
    // Modify this logic to change how page numbers appear
}
```

### Change Pagination Position
In `vendors.html`, the pagination footer is at line ~220.
Move this entire `<div class="grid px-4 py-3...">` section.

---

## 📝 Code Comparison

### Before (No Pagination)
```javascript
// vendors.js
vendors: [],  // All vendors displayed at once

// vendors.html
<template x-for="vendor in vendors">
```

### After (With Pagination)
```javascript
// vendors.js
vendors: [],
currentPage: 1,
itemsPerPage: 10,
get paginatedVendors() {
    return this.vendors.slice(start, end);
}

// vendors.html
<template x-for="vendor in paginatedVendors">
```

---

## ✅ Installation Checklist

Replace these files in your project:

- [ ] `static/admin/js/vendors.js` → Use `vendors-with-pagination.js`
- [ ] `templates/admin/vendors.html` → Use `vendors-with-pagination.html`
- [ ] Clear browser cache (Ctrl+Shift+R)
- [ ] Test with >10 vendors to see pagination
- [ ] Test edit button works
- [ ] Test page navigation
- [ ] Test in dark mode

---

## 🆘 Troubleshooting

### Pagination not showing?
- Make sure you have more than 10 vendors
- Check `itemsPerPage` value in vendors.js
- Verify `paginatedVendors` is used in template

### Edit button not working?
- Check browser console for errors
- Verify `editVendor()` method exists in vendors.js
- Check the route exists on your backend: `/admin/vendors/{code}/edit`

### Page numbers not updating?
- This is a computed property - it should update automatically
- Check Alpine.js is loaded correctly
- Clear browser cache

### "Showing X-Y of Z" incorrect?
- Check `startIndex` and `endIndex` computed properties
- Verify `vendors.length` is correct

---

## 💡 Tips

1. **Performance**: Pagination is client-side. For 1000+ vendors, consider server-side pagination.

2. **State Preservation**: When returning from edit page, user goes back to page 1. To preserve page state, you'd need to:
   - Store `currentPage` in localStorage
   - Restore it on page load

3. **Search/Filter**: To add search, filter `vendors` array first, then paginate the filtered results.

4. **Sorting**: Add sorting before pagination to maintain consistent page content.

---

## 🎉 Features Summary

✅ Edit button added (pencil icon)
✅ Smart pagination (10 items per page)
✅ Dynamic page numbers with ellipsis
✅ Previous/Next navigation
✅ Disabled states for boundary pages
✅ "Showing X-Y of Z" display
✅ Dark mode support
✅ Fully responsive
✅ Follows Windmill design theme

Happy paginating! 📖
