<?php

namespace App\Libraries;

use App\Models\InvoiceModel;

class FinancialReportProjectionService
{
    private InvoiceLedgerService $invoiceLedgerService;
    private InvoiceModel $invoiceModel;

    public function __construct(?InvoiceLedgerService $invoiceLedgerService = null)
    {
        $this->invoiceLedgerService = $invoiceLedgerService ?? new InvoiceLedgerService();
        $this->invoiceModel = new InvoiceModel();
    }

    public function invoiceProjection(int $invoiceId): array
    {
        $ledger = $this->invoiceLedgerService->calculateInvoice($invoiceId);

        return [
            'invoice_id' => $invoiceId,
            'invoice_gross_charges_cents' => (int) ($ledger['totalAmountCents'] ?? 0),
            'applied_discounts_cents' => (int) ($ledger['discountCents'] ?? 0),
            'net_charges_cents' => max(0, (int) ($ledger['totalAmountCents'] ?? 0) - (int) ($ledger['discountCents'] ?? 0)),
            'valid_payments_cents' => (int) ($ledger['paidCents'] ?? 0),
            'completed_cash_refunds_cents' => (int) ($ledger['completedRefundCents'] ?? 0),
            'amount_due_cents' => (int) ($ledger['balanceDueCents'] ?? 0),
            'customer_credit_cents' => (int) ($ledger['customerCreditCents'] ?? 0),
            'approved_refund_reservations_cents' => (int) ($ledger['approvedRefundReservationCents'] ?? 0),
            'available_refundable_credit_cents' => (int) ($ledger['availableRefundableCreditCents'] ?? 0),
        ];
    }

    public function allInvoiceProjections(?string $schoolYear = null): array
    {
        $query = $this->invoiceModel->select('id')->orderBy('id', 'ASC');
        if ($schoolYear !== null && $schoolYear !== '') {
            $query->where('school_year', $schoolYear);
        }

        $rows = $query->findAll();
        return array_map(fn (array $row): array => $this->invoiceProjection((int) $row['id']), $rows);
    }
}