root
76 lines
2.9 KiB
PHP
76 lines
2.9 KiB
PHP
<?php
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namespace App\Libraries\Tuition;
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use App\Interfaces\TuitionCalculatorInterface;
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final class NewTuitionCalculatorService implements TuitionCalculatorInterface
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{
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public function calculateFamilyTuition(array $students, array $config): array
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{
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$gradeFee = (int) ($config['grade_fee'] ?? 9);
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$fullAmountCents = $this->toCents($config['new_tuition_full_amount'] ?? 370);
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$secondDiscountCents = $this->toCents($config['new_tuition_second_student_discount'] ?? 50);
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$thirdDiscountCents = $this->toCents($config['new_tuition_third_student_discount'] ?? 50);
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$fourthPlusDiscountCents = $this->toCents($config['new_tuition_fourth_plus_discount'] ?? 100);
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usort($students, function (array $left, array $right) use ($gradeFee): int {
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$leftLevel = GradeLevelParser::parse($left['grade_level'] ?? null, $gradeFee);
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$rightLevel = GradeLevelParser::parse($right['grade_level'] ?? null, $gradeFee);
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return [$leftLevel, (int) ($left['student_id'] ?? 0)] <=> [$rightLevel, (int) ($right['student_id'] ?? 0)];
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});
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$details = [];
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foreach (array_values($students) as $index => $student) {
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$position = $index + 1;
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if ($position === 1) {
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$discountCents = 0;
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$rule = 'new_first_student_full_amount';
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} elseif ($position === 2) {
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$discountCents = $secondDiscountCents;
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$rule = 'new_second_student_discount';
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} elseif ($position === 3) {
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$discountCents = $thirdDiscountCents;
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$rule = 'new_third_student_discount';
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} else {
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$discountCents = $fourthPlusDiscountCents;
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$rule = 'new_fourth_plus_student_discount';
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}
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$amountCents = max(0, $fullAmountCents - $discountCents);
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$details[] = [
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'student_id' => (int) ($student['student_id'] ?? 0),
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'student_name' => (string) ($student['student_name'] ?? ''),
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'grade_level' => $student['grade_level'] ?? null,
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'family_position' => $position,
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'full_amount' => $this->fromCents($fullAmountCents),
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'discount' => $this->fromCents($discountCents),
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'rule' => $rule,
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'amount' => $this->fromCents($amountCents),
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];
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}
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$total = array_sum(array_map(fn (array $detail): int => $this->toCents($detail['amount']), $details));
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return [
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'calculator' => 'new',
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'total' => $this->fromCents($total),
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'details' => $details,
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];
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}
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private function toCents($amount): int
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{
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return (int) round(((float) $amount) * 100);
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}
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private function fromCents(int $cents): string
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{
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return number_format($cents / 100, 2, '.', '');
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}
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}
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