<?php

namespace Tests\App\Libraries;

use App\Libraries\ParentLedgerService;
use App\Libraries\RefundEligibilityResult;
use CodeIgniter\Test\CIUnitTestCase;

class ParentLedgerServiceHarness extends ParentLedgerService
{
    public function __construct(
        private array $invoices,
        private array $ledgers,
        private array $eligibilities
    ) {
    }

    protected function loadInvoices(int $parentId, string $schoolYear, ?string $semester): array
    {
        return array_values(array_filter($this->invoices, static function (array $invoice) use ($parentId, $schoolYear, $semester): bool {
            if ((int)($invoice['parent_id'] ?? 0) !== $parentId || (string)($invoice['school_year'] ?? '') !== $schoolYear) {
                return false;
            }

            return $semester === null || $semester === '' || (string)($invoice['semester'] ?? '') === $semester;
        }));
    }

    protected function ledgerForInvoice(int $invoiceId): array
    {
        return $this->ledgers[$invoiceId] ?? [];
    }

    protected function eligibilityForSource(
        int $parentId,
        ?int $invoiceId,
        string $sourceType,
        int $sourceId
    ): RefundEligibilityResult {
        return $this->eligibilities[$sourceId] ?? new RefundEligibilityResult(0, 0, 0, 0, []);
    }
}

class ParentLedgerServiceTest extends CIUnitTestCase
{
    public function testParentProjectionAggregatesLedgerAndEligibilityFields(): void
    {
        $service = new ParentLedgerServiceHarness(
            [
                ['id' => 10, 'parent_id' => 5, 'school_year' => '2026-2027', 'semester' => 'Fall', 'invoice_number' => 'INV-10'],
                ['id' => 11, 'parent_id' => 5, 'school_year' => '2026-2027', 'semester' => 'Fall', 'invoice_number' => 'INV-11'],
                ['id' => 12, 'parent_id' => 5, 'school_year' => '2026-2027', 'semester' => 'Spring', 'invoice_number' => 'INV-12'],
            ],
            [
                10 => [
                    'totalAmountCents' => 10000,
                    'discountCents' => 1000,
                    'paidCents' => 11000,
                    'completedRefundCents' => 500,
                    'balanceDueCents' => 0,
                    'customerCreditCents' => 1500,
                    'status' => 'paid',
                ],
                11 => [
                    'totalAmountCents' => 8000,
                    'discountCents' => 0,
                    'paidCents' => 2000,
                    'completedRefundCents' => 0,
                    'balanceDueCents' => 6000,
                    'customerCreditCents' => 0,
                    'status' => 'partially_paid',
                ],
            ],
            [
                10 => new RefundEligibilityResult(1500, 0, 300, 1200, ['HAS_APPROVED_RESERVATIONS']),
                11 => new RefundEligibilityResult(0, 0, 0, 0, ['NO_AVAILABLE_CREDIT']),
            ]
        );

        $projection = $service->getParentProjection(5, '2026-2027', 'Fall');

        $this->assertSame(18000, $projection['grossChargesCents']);
        $this->assertSame(1000, $projection['discountCents']);
        $this->assertSame(17000, $projection['netInvoiceChargesCents']);
        $this->assertSame(13000, $projection['validPaymentCents']);
        $this->assertSame(500, $projection['completedRefundCents']);
        $this->assertSame(6000, $projection['balanceDueCents']);
        $this->assertSame(1500, $projection['customerCreditCents']);
        $this->assertSame(300, $projection['approvedRefundReservationCents']);
        $this->assertSame(1200, $projection['availableRefundableCreditCents']);
        $this->assertSame('170.00', $projection['net_invoice_charges']);
        $this->assertSame('12.00', $projection['available_refundable_credit']);
        $this->assertCount(2, $projection['invoices']);
    }
}