# Supervisor Assignment Table - Improvements

## New Features Added

### 1. ✅ **Semester and Year Filters**
Added dropdown filters to filter students by semester and year for better organization.

**Location**: Top of the supervisor assignment table

**Features**:
- Filter by Semester (1 or 2)
- Filter by Year (dynamically populated from student data)
- Both filters work in combination with existing filters (Assignment Type, Search)

**Implementation**:
- Added `semesterFilter` and `yearFilter` properties to Livewire component
- Updated query to filter students by semester and year
- Added dropdowns in the filter section
- Filters persist in URL query parameters

---

### 2. ✅ **Edit Supervisor Assignment**
Coordinators can now change the assigned supervisor for a student.

**How It Works**:
1. Click "Edit" button next to an assigned student
2. Select a new supervisor from the list (sorted by distance)
3. Optionally add notes about the change
4. Click "Update Assignment"

**Features**:
- Shows all available supervisors (including those with full quota)
- Displays supervisor information (name, ID, department, research group)
- Shows distance from student's placement location
- Shows quota status (available slots)
- Automatically updates quota counts:
  - Decreases old supervisor's count
  - Increases new supervisor's count
- Maintains assignment notes

**Modal Preview**:
```
┌─────────────────────────────────────────────┐
│ Edit Supervisor Assignment          ✕      │
├─────────────────────────────────────────────┤
│ Note: Select a new supervisor to replace   │
│ the current assignment.                     │
├─────────────────────────────────────────────┤
│ Select New Supervisor (Nearest First)      │
│ ┌─────────────────────────────────────────┐ │
│ │ ○ Dr. Ahmad Fadzli (LC2001 | CS |SERG) │ │
│ │   12.5 km  Quota: 2/9 (7 available)    │ │
│ │ ○ Prof. Siti Hajar (LC2002 | CS |DSSIM)│ │
│ │   19.4 km  Quota: 3/8 (5 available)    │ │
│ └─────────────────────────────────────────┘ │
│                                             │
│ Assignment Notes (Optional)                 │
│ ┌─────────────────────────────────────────┐ │
│ │ [textarea for notes]                    │ │
│ └─────────────────────────────────────────┘ │
│                                             │
│                    [Cancel] [Update]        │
└─────────────────────────────────────────────┘
```

---

### 3. ✅ **Remove Supervisor Assignment**
Coordinators can now remove/unassign a supervisor from a student.

**How It Works**:
1. Click "Remove" button next to an assigned student
2. Confirm the action in the confirmation dialog
3. Assignment is deleted and supervisor quota is updated

**Features**:
- Confirmation dialog to prevent accidental removal
- Automatically decreases supervisor's current assignments count
- Student becomes "Unassigned" and can be assigned a new supervisor
- Success/error messages for feedback

---

### 4. ✅ **Assigned By Information**
The system now tracks and displays who assigned each supervisor.

**Where to See**:
- In the "View Details" modal
- Shows: Coordinator name and lecturer ID

**Example**:
```
Assigned By: Dr. Ahmad Fadzli bin Hassan (LC2001)
Assigned At: 2025-11-20 14:35:22
```

**Automatically Captured**:
- When using "Assign" button (manual assignment)
- When using "Auto Assign" button (auto assignment)
- When editing an assignment (uses current coordinator)

---

## Updated UI Elements

### Filter Section (Enhanced)
```
┌──────────────────────────────────────────────────────────────────────┐
│ [Search: student ID, name, email, company...]                       │
│ [Assignment Type ▼] [Semester ▼] [Year ▼] [Per Page ▼]            │
└──────────────────────────────────────────────────────────────────────┘
```

### Actions Column (Enhanced)
**Before**:
- Assign | Auto Assign (for unassigned)
- View Details (for assigned)

**After**:
- Assign | Auto Assign (for unassigned)
- View Details | Edit | Remove (for assigned)

---

## Technical Implementation

### Files Modified

#### 1. `app/Livewire/SupervisorAssignmentTable.php`

**New Properties**:
```php
public $semesterFilter = '';
public $yearFilter = '';
public $showEditModal = false;
public $editAssignmentID = null;
public $newSupervisorID = null;
```

**New Methods**:
```php
// Filter updaters
public function updatingSemesterFilter()
public function updatingYearFilter()

// Edit functionality
public function openEditModal($assignmentID)
public function closeEditModal()
public function updateAssignment()

// Remove functionality
public function removeAssignment($assignmentID)
```

**Query Updates**:
```php
// Added semester filter
if ($this->semesterFilter) {
    $query->where('semester', $this->semesterFilter);
}

// Added year filter
if ($this->yearFilter) {
    $query->where('year', $this->yearFilter);
}
```

**Render Method Updates**:
```php
// Get available years and semesters for filters
$availableYears = Student::distinct()->pluck('year')->filter()->sort()->values();
$availableSemesters = [1, 2];
```

#### 2. `resources/views/livewire/supervisor-assignment-table.blade.php`

**Filter Section**:
- Changed grid from 4 columns to 6 columns
- Added Semester dropdown
- Added Year dropdown

**Actions Column**:
- Added "Edit" button (yellow, hover:yellow-900)
- Added "Remove" button (red, hover:red-900) with confirmation
- Added loading states

**New Modal**:
- Edit Assignment Modal with supervisor selection
- Similar to Assign Modal but for editing existing assignments

---

## User Workflow Examples

### Example 1: Filter by Semester and Year
```
1. Navigate to "Supervisor Assignment"
2. Select "Semester 1" from dropdown
3. Select "2025" from year dropdown
4. ✅ Table shows only students in Semester 1, 2025
```

### Example 2: Edit an Assignment
```
1. Find a student with "Assigned" status
2. Click "Edit" button
3. Select a new supervisor from the list
4. Add notes: "Student requested change due to specialization match"
5. Click "Update Assignment"
6. ✅ Assignment updated, quotas adjusted
```

### Example 3: Remove an Assignment
```
1. Find a student with "Assigned" status
2. Click "Remove" button
3. Confirm the action
4. ✅ Assignment removed, supervisor quota freed
5. Student appears as "Unassigned"
6. Can assign a new supervisor
```

### Example 4: Track Who Made Assignments
```
1. Click "View Details" on an assigned student
2. See "Assigned By" information:
   - Name: Dr. Ahmad Fadzli bin Hassan
   - ID: LC2001
   - Date: 2025-11-20 14:35:22
3. ✅ Full audit trail of who assigned the supervisor
```

---

## Benefits

### For Coordinators:
✅ **Better Organization**: Filter by semester and year to manage cohorts  
✅ **Flexibility**: Can change supervisor assignments when needed  
✅ **Control**: Can remove incorrect assignments easily  
✅ **Transparency**: Track who made each assignment  
✅ **Efficiency**: All actions in one place  

### For Students:
✅ **Better Matches**: Coordinators can reassign if initial match wasn't optimal  
✅ **Flexibility**: Can be reassigned if supervisor becomes unavailable  

### For System:
✅ **Data Integrity**: Quota counts automatically maintained  
✅ **Audit Trail**: All assignments tracked with coordinator info  
✅ **User-Friendly**: Confirmation dialogs prevent mistakes  

---

## Testing Checklist

### Test Semester/Year Filters:
- [ ] Select different semesters and verify filtering
- [ ] Select different years and verify filtering
- [ ] Combine with other filters (search, assignment type)
- [ ] Clear filters and verify all students show

### Test Edit Assignment:
- [ ] Click "Edit" on an assigned student
- [ ] Select a different supervisor
- [ ] Verify modal shows all supervisors
- [ ] Update assignment with notes
- [ ] Verify old supervisor quota decreased
- [ ] Verify new supervisor quota increased
- [ ] Verify "Assigned By" shows current coordinator

### Test Remove Assignment:
- [ ] Click "Remove" on an assigned student
- [ ] Confirm removal
- [ ] Verify assignment deleted
- [ ] Verify supervisor quota decreased
- [ ] Verify student shows as "Unassigned"
- [ ] Verify can assign new supervisor

### Test Assigned By Tracking:
- [ ] Assign a supervisor manually
- [ ] View details and check "Assigned By" shows coordinator
- [ ] Use auto-assign
- [ ] View details and check "Assigned By" captured
- [ ] Edit an assignment
- [ ] Verify "Assigned By" still accurate

---

## Summary

🎉 **All improvements successfully implemented!**

✅ Semester and Year filters for better organization  
✅ Edit supervisor assignments with quota management  
✅ Remove supervisor assignments with confirmation  
✅ "Assigned By" tracking for audit trail  
✅ Enhanced UI with all actions accessible  
✅ Proper validation and error handling  
✅ Loading states and confirmations for better UX  

**The supervisor assignment system is now more flexible, organized, and auditable!**


