Program cascade delete + trainer-group assignment from both sides

1. Program delete:
   - Removed delete button from program list (was broken)
   - Added red "حذف البرنامج" button inside program show page
   - Cascade deletes: sessions, schedules, enrollments, waitlists,
     assignments, groups — all force-deleted in one transaction

2. Trainer-group assignment:
   - GroupShow: assign/remove trainers via polymorphic assignments table
   - TrainerShow: assign/remove groups, shows all assigned groups
     (both head_trainer_id and assignments-based)
   - A trainer can be assigned to multiple groups
   - A group can have multiple trainers assigned
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Domain/Training/Services/TrainingProgramService.php

@@ -101,10 +101,18 @@ public function changeStatus(TrainingProgram $program, string $newStatus): Train
     public function delete(TrainingProgram $program): void
     {
         DB::transaction(function () use ($program) {
-            if ($program->groups()->whereIn('status', ['active', 'forming'])->exists()) {
-                throw new DomainException('لا يمكن حذف برنامج يحتوي على مجموعات نشطة');
+            foreach ($program->groups as $group) {
+                $group->sessions()->forceDelete();
+                $group->schedules()->delete();
+                $group->enrollments()->forceDelete();
+                $group->waitlists()->delete();
+                \App\Domain\Scheduling\Models\Assignment::where('assignable_type', TrainingGroup::class)
+                    ->where('assignable_id', $group->id)
+                    ->delete();
+                $group->forceDelete();
             }
-            $program->delete();
+            $program->enrollments()->forceDelete();
+            $program->forceDelete();
         });
     }
 }

app/Livewire/Groups/GroupShow.php

@@ -4,10 +4,12 @@
 
 use App\Domain\Attendance\Enums\AttendanceStatus;
 use App\Domain\Attendance\Models\AttendanceRecord;
+use App\Domain\Scheduling\Models\Assignment;
 use App\Domain\Training\Enums\SessionStatus;
 use App\Domain\Training\Models\Enrollment;
 use App\Domain\Training\Models\TrainingGroup;
 use App\Domain\Training\Models\TrainingSession;
+use App\Models\User;
 use Livewire\Attributes\Layout;
 use Livewire\Attributes\Title;
 use Livewire\Component;
@@ -18,6 +20,7 @@ class GroupShow extends Component
 {
     public TrainingGroup $group;
     public string $activeTab = 'overview';
+    public ?int $assignTrainerId = null;
 
     public function mount(TrainingGroup $group): void
     {
@@ -34,6 +37,53 @@ public function mount(TrainingGroup $group): void
         ]);
     }
 
+    public function assignTrainer(): void
+    {
+        $this->authorize('groups.update');
+
+        if (!$this->assignTrainerId) {
+            return;
+        }
+
+        $exists = Assignment::where('assignable_type', TrainingGroup::class)
+            ->where('assignable_id', $this->group->id)
+            ->where('user_id', $this->assignTrainerId)
+            ->where('status', 'active')
+            ->exists();
+
+        if ($exists) {
+            session()->flash('error', __('هذا المدرب مُعيَّن بالفعل لهذه المجموعة'));
+            return;
+        }
+
+        Assignment::create([
+            'academy_id' => $this->group->academy_id,
+            'user_id' => $this->assignTrainerId,
+            'assignable_type' => TrainingGroup::class,
+            'assignable_id' => $this->group->id,
+            'role_label' => 'مدرب',
+            'scope' => 'full',
+            'status' => 'active',
+            'is_primary' => false,
+            'start_date' => now()->toDateString(),
+        ]);
+
+        $this->assignTrainerId = null;
+        session()->flash('success', __('تم تعيين المدرب بنجاح'));
+    }
+
+    public function removeTrainer(int $assignmentId): void
+    {
+        $this->authorize('groups.update');
+
+        Assignment::where('id', $assignmentId)
+            ->where('assignable_type', TrainingGroup::class)
+            ->where('assignable_id', $this->group->id)
+            ->update(['status' => 'cancelled']);
+
+        session()->flash('success', __('تم إلغاء تعيين المدرب'));
+    }
+
     public function render()
     {
         // Active enrollments with participant details
@@ -114,6 +164,19 @@ public function render()
         // Waitlist count
         $waitlistCount = $this->group->waitlist_count ?? 0;
 
+        // Trainer assignments for this group
+        $trainerAssignments = Assignment::where('assignable_type', TrainingGroup::class)
+            ->where('assignable_id', $this->group->id)
+            ->where('status', 'active')
+            ->with('user')
+            ->get();
+
+        $availableTrainers = User::whereHas('roles', fn ($q) => $q->whereIn('slug', ['trainer', 'head_trainer']))
+            ->where('status', 'active')
+            ->whereNotIn('id', $trainerAssignments->pluck('user_id')->toArray())
+            ->orderBy('name_ar')
+            ->get(['id', 'name_ar', 'name']);
+
         return view('livewire.groups.group-show', [
             'activeEnrollments' => $activeEnrollments,
             'totalEnrollments' => $totalEnrollments,
@@ -131,6 +194,8 @@ public function render()
             'capacityPercent' => $capacityPercent,
             'participantAttendanceRates' => $participantAttendanceRates,
             'waitlistCount' => $waitlistCount,
+            'trainerAssignments' => $trainerAssignments,
+            'availableTrainers' => $availableTrainers,
         ]);
     }
 }

app/Livewire/HR/TrainerShow.php

@@ -5,6 +5,7 @@
 use App\Domain\Attendance\Enums\AttendanceStatus;
 use App\Domain\Attendance\Models\AttendanceRecord;
 use App\Domain\HR\Models\Trainer;
+use App\Domain\Scheduling\Models\Assignment;
 use App\Domain\Training\Models\TrainingGroup;
 use App\Domain\Training\Models\TrainingSession;
 use Livewire\Attributes\Layout;
@@ -17,6 +18,7 @@ class TrainerShow extends Component
 {
     public Trainer $trainer;
     public string $activeTab = 'overview';
+    public ?int $assignGroupId = null;
 
     public function mount(Trainer $trainer): void
     {
@@ -31,19 +33,97 @@ public function mount(Trainer $trainer): void
         ]);
     }
 
+    public function assignGroup(): void
+    {
+        $this->authorize('trainers.update');
+
+        $trainerUserId = $this->trainer->employee?->user_id;
+        if (!$this->assignGroupId || !$trainerUserId) {
+            return;
+        }
+
+        $exists = Assignment::where('assignable_type', TrainingGroup::class)
+            ->where('assignable_id', $this->assignGroupId)
+            ->where('user_id', $trainerUserId)
+            ->where('status', 'active')
+            ->exists();
+
+        if ($exists) {
+            session()->flash('error', __('هذا المدرب مُعيَّن بالفعل لهذه المجموعة'));
+            return;
+        }
+
+        $group = TrainingGroup::find($this->assignGroupId);
+        if (!$group) {
+            return;
+        }
+
+        Assignment::create([
+            'academy_id' => $group->academy_id,
+            'user_id' => $trainerUserId,
+            'assignable_type' => TrainingGroup::class,
+            'assignable_id' => $this->assignGroupId,
+            'role_label' => 'مدرب',
+            'scope' => 'full',
+            'status' => 'active',
+            'is_primary' => false,
+            'start_date' => now()->toDateString(),
+        ]);
+
+        $this->assignGroupId = null;
+        session()->flash('success', __('تم تعيين المجموعة بنجاح'));
+    }
+
+    public function removeGroupAssignment(int $assignmentId): void
+    {
+        $this->authorize('trainers.update');
+
+        Assignment::where('id', $assignmentId)
+            ->where('user_id', $this->trainer->employee?->user_id)
+            ->update(['status' => 'cancelled']);
+
+        session()->flash('success', __('تم إلغاء تعيين المجموعة'));
+    }
+
     public function render()
     {
         $person = $this->trainer->employee?->person ?? $this->trainer->person;
         $trainerUserId = $this->trainer->employee?->user_id;
 
-        // Groups where this trainer is head trainer
-        $groups = TrainingGroup::where('head_trainer_id', $trainerUserId)
+        // Groups where this trainer is head trainer OR assigned via assignments
+        $assignedGroupIds = Assignment::where('user_id', $trainerUserId)
+            ->where('assignable_type', TrainingGroup::class)
+            ->where('status', 'active')
+            ->pluck('assignable_id')
+            ->toArray();
+
+        $groups = TrainingGroup::where(function ($q) use ($trainerUserId, $assignedGroupIds) {
+                $q->where('head_trainer_id', $trainerUserId)
+                  ->orWhereIn('id', $assignedGroupIds);
+            })
             ->with(['program', 'schedules', 'branch'])
             ->withCount(['enrollments as active_enrollments_count' => function ($q) {
                 $q->where('status', 'active');
             }])
             ->get();
 
+        // Assignments for this trainer (for UI remove buttons)
+        $trainerAssignments = Assignment::where('user_id', $trainerUserId)
+            ->where('assignable_type', TrainingGroup::class)
+            ->where('status', 'active')
+            ->get()
+            ->keyBy('assignable_id');
+
+        // Available groups not yet assigned
+        $availableGroups = TrainingGroup::whereNotIn('id', array_merge(
+                $assignedGroupIds,
+                TrainingGroup::where('head_trainer_id', $trainerUserId)->pluck('id')->toArray()
+            ))
+            ->whereIn('status', ['active', 'forming'])
+            ->with('program')
+            ->orderBy('name_ar')
+            ->get(['id', 'name_ar', 'name', 'training_program_id']);
+
         // Upcoming sessions (next 7 days)
         $upcomingSessions = TrainingSession::whereHas('group', function ($q) use ($trainerUserId) {
                 $q->where('head_trainer_id', $trainerUserId);
@@ -111,6 +191,8 @@ public function render()
             'recentCompensations' => $recentCompensations,
             'monthlyEarnings' => $monthlyEarnings,
             'pendingAdvances' => $pendingAdvances,
+            'trainerAssignments' => $trainerAssignments,
+            'availableGroups' => $availableGroups,
         ]);
     }
 }

app/Livewire/Programs/ProgramShow.php

@@ -2,9 +2,11 @@
 
 namespace App\Livewire\Programs;
 
+use App\Domain\Shared\Exceptions\DomainException;
 use App\Domain\Training\Models\Enrollment;
 use App\Domain\Training\Models\TrainingGroup;
 use App\Domain\Training\Models\TrainingProgram;
+use App\Domain\Training\Services\TrainingProgramService;
 use Livewire\Attributes\Layout;
 use Livewire\Attributes\Title;
 use Livewire\Component;
@@ -32,6 +34,19 @@ public function mount(TrainingProgram $program): void
         ]);
     }
 
+    public function deleteProgram(TrainingProgramService $service): void
+    {
+        $this->authorize('programs.delete');
+
+        try {
+            $service->delete($this->program);
+            session()->flash('success', __('تم حذف البرنامج وجميع مجموعاته بنجاح'));
+            $this->redirect(route('programs.list'), navigate: true);
+        } catch (DomainException $e) {
+            session()->flash('error', $e->getMessage());
+        }
+    }
+
     public function render()
     {
         $groups = $this->program->groups;

resources/views/livewire/groups/group-show.blade.php

@@ -257,6 +257,60 @@ class="text-blue-600 hover:text-blue-800 hover:underline">
                     @endif
                 </div>
 
+                {{-- Trainer Assignments Card --}}
+                <div class="bg-white rounded-xl shadow-sm border border-gray-200 p-4 sm:p-6">
+                    <h3 class="text-base font-semibold text-gray-800 mb-4">{{ __('المدربون المُعيَّنون') }}</h3>
+
+                    {{-- Current assignments --}}
+                    @if($trainerAssignments->isNotEmpty())
+                    <div class="space-y-2 mb-4">
+                        @foreach($trainerAssignments as $assignment)
+                        <div class="flex items-center justify-between p-3 bg-gray-50 rounded-lg">
+                            <div class="flex items-center gap-3">
+                                <div class="w-9 h-9 rounded-full bg-indigo-100 flex items-center justify-center">
+                                    <svg class="w-5 h-5 text-indigo-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z"/>
+                                    </svg>
+                                </div>
+                                <div>
+                                    <p class="text-sm font-medium text-gray-800">{{ $assignment->user?->name_ar ?? $assignment->user?->name ?? '—' }}</p>
+                                    <p class="text-xs text-gray-500">{{ __('منذ') }} {{ $assignment->start_date?->format('Y-m-d') ?? '—' }}</p>
+                                </div>
+                            </div>
+                            @can('groups.update')
+                            <button wire:click="removeTrainer({{ $assignment->id }})"
+                                    wire:confirm="{{ __('هل تريد إلغاء تعيين هذا المدرب؟') }}"
+                                    class="text-red-500 hover:text-red-700 p-1">
+                                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
+                                </svg>
+                            </button>
+                            @endcan
+                        </div>
+                        @endforeach
+                    </div>
+                    @else
+                    <p class="text-sm text-gray-500 mb-4">{{ __('لا يوجد مدربون مُعيَّنون') }}</p>
+                    @endif
+
+                    {{-- Assign new trainer --}}
+                    @can('groups.update')
+                    <div class="flex items-center gap-2 pt-3 border-t border-gray-100">
+                        <select wire:model="assignTrainerId" class="flex-1 text-sm border-gray-300 rounded-lg focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500">
+                            <option value="">{{ __('اختر مدرب...') }}</option>
+                            @foreach($availableTrainers as $trainer)
+                            <option value="{{ $trainer->id }}">{{ $trainer->name_ar ?? $trainer->name }}</option>
+                            @endforeach
+                        </select>
+                        <button wire:click="assignTrainer"
+                                wire:loading.attr="disabled"
+                                class="px-4 py-2 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 text-sm font-medium whitespace-nowrap">
+                            {{ __('تعيين') }}
+                        </button>
+                    </div>
+                    @endcan
+                </div>
+
                 {{-- Schedule Grid Card --}}
                 <div class="bg-white rounded-xl shadow-sm border border-gray-200 p-4 sm:p-6">
                     <h3 class="text-base font-semibold text-gray-800 mb-4">{{ __('مواعيد التدريب') }}</h3>

resources/views/livewire/hr/trainer-show.blade.php

@@ -325,6 +325,7 @@ class="text-sm font-semibold text-blue-600 hover:text-blue-800 hover:underline">
                                 @endif
                             </div>
 
+                            <div class="flex items-center gap-3">
                                 <div class="text-end">
                                     <div class="flex items-center gap-1 text-sm">
                                         <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197m13.5-9a2.5 2.5 0 11-5 0 2.5 2.5 0 015 0z"/></svg>
@@ -337,6 +338,18 @@ class="text-sm font-semibold text-blue-600 hover:text-blue-800 hover:underline">
                                         <div class="h-1.5 rounded-full {{ $fillRate >= 90 ? 'bg-red-500' : ($fillRate >= 70 ? 'bg-amber-500' : 'bg-green-500') }}" style="width: {{ min($fillRate, 100) }}%"></div>
                                     </div>
                                 </div>
+                                @if(isset($trainerAssignments[$group->id]))
+                                @can('trainers.update')
+                                <button wire:click="removeGroupAssignment({{ $trainerAssignments[$group->id]->id }})"
+                                        wire:confirm="{{ __('إلغاء تعيين هذه المجموعة؟') }}"
+                                        class="text-red-400 hover:text-red-600 p-1" title="{{ __('إلغاء التعيين') }}">
+                                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
+                                    </svg>
+                                </button>
+                                @endcan
+                                @endif
+                            </div>
                         </div>
                     </div>
                     @endforeach
@@ -348,6 +361,26 @@ class="text-sm font-semibold text-blue-600 hover:text-blue-800 hover:underline">
                 </div>
                 @endif
             </div>
+
+            {{-- Assign new group --}}
+            @can('trainers.update')
+            <div class="mt-4 bg-white rounded-xl shadow-sm border border-gray-200 p-4">
+                <h4 class="text-sm font-semibold text-gray-700 mb-3">{{ __('تعيين مجموعة جديدة') }}</h4>
+                <div class="flex items-center gap-2">
+                    <select wire:model="assignGroupId" class="flex-1 text-sm border-gray-300 rounded-lg focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500">
+                        <option value="">{{ __('اختر مجموعة...') }}</option>
+                        @foreach($availableGroups as $availGroup)
+                        <option value="{{ $availGroup->id }}">{{ $availGroup->name_ar ?? $availGroup->name }} — {{ $availGroup->program?->name_ar }}</option>
+                        @endforeach
+                    </select>
+                    <button wire:click="assignGroup"
+                            wire:loading.attr="disabled"
+                            class="px-4 py-2 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 text-sm font-medium whitespace-nowrap">
+                        {{ __('تعيين') }}
+                    </button>
+                </div>
+            </div>
+            @endcan
         </div>
 
         {{-- Schedule Tab --}}

resources/views/livewire/programs/program-list.blade.php

@@ -140,14 +140,6 @@ class="text-blue-600 hover:text-blue-800 text-sm font-medium">
                                     {{ __('تعديل') }}
                                 </a>
                                 @endpermission
-                                @permission('programs.delete')
-                                <button wire:click="delete('{{ $program->uuid }}')"
-                                        wire:confirm="{{ __('هل أنت متأكد من حذف هذا البرنامج؟') }}"
-                                        wire:loading.attr="disabled"
-                                        class="text-red-600 hover:text-red-800 text-sm font-medium">
-                                    {{ __('حذف') }}
-                                </button>
-                                @endpermission
                             </div>
                         </td>
                     </tr>
@@ -222,15 +214,6 @@ class="inline-flex items-center gap-1 py-2 text-blue-600 hover:text-blue-800 tex
                         {{ __('تعديل') }}
                     </a>
                     @endpermission
-                    @permission('programs.delete')
-                    <button wire:click="delete('{{ $program->uuid }}')"
-                            wire:confirm="{{ __('هل أنت متأكد من حذف هذا البرنامج؟') }}"
-                            wire:loading.attr="disabled"
-                            class="inline-flex items-center gap-1 py-2 text-red-600 hover:text-red-800 text-sm font-medium">
-                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"/></svg>
-                        {{ __('حذف') }}
-                    </button>
-                    @endpermission
                 </div>
             </div>
         @empty

resources/views/livewire/programs/program-show.blade.php

@@ -80,6 +80,14 @@ class="px-4 py-2 bg-gray-100 text-gray-700 rounded-lg hover:bg-gray-200 text-sm
                     {{ __('تعديل') }}
                 </a>
                 @endcan
+                @can('programs.delete')
+                <button wire:click="deleteProgram"
+                        wire:confirm="{{ __('هل أنت متأكد؟ سيتم حذف البرنامج وجميع المجموعات والاشتراكات المرتبطة به نهائياً.') }}"
+                        wire:loading.attr="disabled"
+                        class="px-4 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700 text-sm font-medium">
+                    {{ __('حذف البرنامج') }}
+                </button>
+                @endcan
                 <a href="{{ route('programs.list') }}" wire:navigate
                    class="px-4 py-2 text-gray-600 hover:text-gray-800 text-sm">
                     {{ __('رجوع') }}