# Shift Operator Assignment Improvements - Complete ✅

## Overview
Enhanced the shift creation page to improve operator assignment with team filtering, machine ordering, and smart operator selection.

---

## Features Implemented

### 1. Machine Ordering ✅
**Machines now display in correct order:**
- T1, T2, T3, T4, T5, T6, T7
- Sorted numerically by machine number
- Consistent order every time

**Implementation:**
```typescript
const sortedMachines = data.sort((a: any, b: any) => {
  const numA = parseInt(a.name.replace('T', ''))
  const numB = parseInt(b.name.replace('T', ''))
  return numA - numB
})
```

---

### 2. Team-Based Operator Filtering ✅
**Only shows operators from manager's team:**
- Fetches workers filtered by team ID
- Prevents assigning operators from other teams
- Automatic based on manager's assigned team

**API Enhancement:**
```typescript
GET /api/workers?teamId={teamId}
```

**Benefits:**
- No confusion with operators from other teams
- Ensures correct team composition
- Faster operator selection

---

### 3. Smart Operator Selection ✅
**Prevents duplicate assignments:**
- Selected operators removed from subsequent dropdowns
- Each operator can only be assigned once
- Currently selected operator remains visible in its own dropdown

**How it works:**
1. Operator selects worker for T1
2. That worker disappears from T2-T7 dropdowns
3. Operator selects worker for T2
4. That worker disappears from T3-T7 dropdowns
5. And so on...

**Implementation:**
```typescript
const getAvailableOperators = (currentIndex: number) => {
  const selectedOperatorIds = formData.operators.filter((id, idx) => 
    id && idx !== currentIndex
  )
  return workers.filter((w: any) => 
    w.jobPosition === "Blow Moulder Level 1" && 
    !selectedOperatorIds.includes(w.id)
  )
}
```

---

### 4. Visual Improvements ✅

**Progress Indicator:**
- Shows "X of 7 operators assigned"
- Green checkmark (✓) next to assigned machines
- Clear visual feedback

**Helpful Text:**
- Instructions: "Assign one operator to each machine"
- Note: "Once selected, an operator won't appear in other dropdowns"
- Team restriction: "You can only create shifts for your assigned team"

**Better Layout:**
```
T1  [Select Operator ▼]  ✓
T2  [Select Operator ▼]  ✓
T3  [Select Operator ▼]
T4  [Select Operator ▼]
T5  [Select Operator ▼]
T6  [Select Operator ▼]
T7  [Select Operator ▼]

3 of 7 operators assigned
```

---

## User Experience Flow

### Step 1: Page Loads
- Manager's team is automatically loaded
- Team field is disabled (read-only)
- Workers from manager's team are fetched
- Machines are sorted T1-T7

### Step 2: Assign Operators
- Manager selects operator for T1
- That operator disappears from T2-T7 lists
- Green checkmark appears next to T1
- Progress shows "1 of 7 operators assigned"

### Step 3: Continue Assigning
- Manager selects operator for T2
- That operator disappears from T3-T7 lists
- Progress shows "2 of 7 operators assigned"
- And so on...

### Step 4: Complete Assignment
- All 7 machines have operators
- Progress shows "7 of 7 operators assigned"
- Form can be submitted

---

## Technical Details

### API Changes

**Workers API Enhanced:**
```typescript
GET /api/workers
GET /api/workers?teamId={teamId}  // NEW: Filter by team
```

**Response:**
```json
[
  {
    "id": "worker-1",
    "empNo": "RED-OP1",
    "firstName": "David",
    "surname": "Wilson",
    "jobPosition": "Blow Moulder Level 1",
    "teamId": "team-red-id"
  }
]
```

### State Management

**Form Data:**
```typescript
{
  name: "AM",
  shiftDate: "2024-01-15",
  teamId: "team-red-id",  // Auto-set from manager's team
  operators: [
    "worker-1-id",  // T1
    "worker-2-id",  // T2
    "",             // T3 (not assigned yet)
    "",             // T4
    "",             // T5
    "",             // T6
    ""              // T7
  ]
}
```

---

## Validation Rules

### Operator Assignment
- ✅ Must be from manager's team
- ✅ Must be "Blow Moulder Level 1" position
- ✅ Cannot be assigned to multiple machines
- ✅ All 7 machines must have operators

### Team Restriction
- ✅ Manager can only create shifts for their team
- ✅ Team field is read-only
- ✅ Workers filtered by team automatically

---

## Files Modified

### Pages
1. ✅ `app/shift-manager/create-shift/page.tsx`
   - Added machine sorting
   - Added team-based worker filtering
   - Added smart operator selection
   - Added visual improvements
   - Added progress indicator

### API Routes
1. ✅ `app/api/workers/route.ts`
   - Added teamId query parameter
   - Filter workers by team
   - Maintain backward compatibility

2. ✅ `app/api/shift-manager/my-team/route.ts` (from previous update)
   - Returns manager's assigned team

---

## Benefits

### For Shift Managers
- ✅ Faster shift creation
- ✅ No confusion with other teams
- ✅ Clear visual feedback
- ✅ Prevents assignment errors
- ✅ Intuitive workflow

### For System
- ✅ Data integrity maintained
- ✅ No duplicate assignments
- ✅ Correct team composition
- ✅ Validation at UI level
- ✅ Better user experience

### For Operations
- ✅ Correct operator assignments
- ✅ Team-based organization
- ✅ Audit trail maintained
- ✅ Reduced errors
- ✅ Faster shift setup

---

## Testing Checklist

### Machine Ordering
- [ ] Machines display as T1, T2, T3, T4, T5, T6, T7
- [ ] Order is consistent on page reload
- [ ] All 7 machines are shown

### Team Filtering
- [ ] Only team operators appear in dropdowns
- [ ] Operators from other teams don't appear
- [ ] Team field is disabled/read-only

### Operator Selection
- [ ] Selected operator disappears from other dropdowns
- [ ] Can change selection (operator reappears)
- [ ] All 7 machines can be assigned
- [ ] No duplicate assignments possible

### Visual Feedback
- [ ] Checkmarks appear for assigned machines
- [ ] Progress counter updates correctly
- [ ] Instructions are clear
- [ ] Form is easy to use

---

## Future Enhancements

### Possible Additions
- [ ] Drag-and-drop operator assignment
- [ ] Auto-suggest based on previous shifts
- [ ] Operator availability checking
- [ ] Skill-based recommendations
- [ ] Quick-fill all machines button
- [ ] Save as template
- [ ] Copy from previous shift
- [ ] Operator performance metrics

---

## Summary

✅ **Machines ordered T1-T7**
✅ **Only team operators shown**
✅ **Smart duplicate prevention**
✅ **Visual progress indicator**
✅ **Clear user instructions**
✅ **Improved user experience**

The shift creation process is now more intuitive, faster, and error-proof!