add refund and event logic

app/Services/Invoices/InvoiceService.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace App\Services\Invoices;
+
+use App\Models\Student;
+use App\Models\StudentClass;
+
+class InvoiceService
+{
+    public function __construct(
+        private InvoiceConfigService $config,
+        private InvoiceManagementService $management,
+        private InvoiceGenerationService $generation,
+        private InvoiceTuitionService $tuition,
+        private InvoiceGradeService $grades
+    ) {
+    }
+
+    public function getDefaultSchoolYear(): string
+    {
+        return $this->config->getSchoolYear();
+    }
+
+    public function getDueDate(): ?string
+    {
+        return $this->config->getDueDate();
+    }
+
+    public function getManagementData(?string $schoolYear = null): array
+    {
+        return $this->management->getManagementData($schoolYear);
+    }
+
+    public function generateInvoiceForParent(int $parentId, ?string $schoolYear = null): array
+    {
+        return $this->generation->generateInvoice($parentId, $schoolYear);
+    }
+
+    public function hasClassAssignment(string $schoolYear, int $parentId): bool
+    {
+        if ($parentId <= 0) {
+            return false;
+        }
+        $students = Student::query()->where('parent_id', $parentId)->get(['id']);
+        if ($students->isEmpty()) {
+            return false;
+        }
+
+        $studentIds = $students->pluck('id')->map(fn ($id) => (int) $id)->all();
+
+        return StudentClass::query()
+            ->whereIn('student_id', $studentIds)
+            ->where('school_year', $schoolYear)
+            ->exists();
+    }
+
+    public function getGradeLevelInfo(string $grade): array
+    {
+        return $this->grades->getGradeLevel($grade);
+    }
+
+    public function compareGrades(string $gradeA, string $gradeB): int
+    {
+        return $this->grades->compareGrades($gradeA, $gradeB);
+    }
+
+    public function calculateTotalTuitionFee(array $students): float
+    {
+        return $this->tuition->calculateTotalTuitionFee($students);
+    }
+
+    public function calculateTuitionFee(array $registeredKids, array $withdrawnKids, ?string $refundDeadline = null): float
+    {
+        return $this->tuition->calculateTuitionFee($registeredKids, $withdrawnKids, $refundDeadline);
+    }
+}