<?php
require_once __DIR__ . '/BasePosting.php';

class SupplierCreditNotePosting extends BasePosting
{
    protected function getDocType(): string { return 'supplier_credit_note'; }

    protected function getSkuTotalAccountColumn(): string { return 'purchase_account_code'; }

    protected function fetchDocument(int $id): array
    {
        $sth = $this->pdo->prepare(
            "SELECT i.*, COALESCE(c.contact_name, '') AS contact_name
             FROM td_invoice i
             LEFT JOIN md_contact c
               ON c.company_id = i.company_id AND c.id = i.contact_id
             WHERE i.company_id = :cid AND i.id = :id AND i.doc_type = 'supplier_credit_note'
             LIMIT 1"
        );
        $sth->execute([':cid' => $this->companyId, ':id' => $id]);
        $doc = $sth->fetch(PDO::FETCH_ASSOC);
        if (!$doc) throw new Exception("Supplier credit note #{$id} not found.");
        return $doc;
    }

    protected function getAmounts(array $doc): array
    {
        $grand_total = abs((float)$doc['grand_total']);
        $tax         = abs((float)$doc['tax']);
        return [
            'grand_total' => $grand_total,
            'tax'         => $tax,
            'total'       => $grand_total - $tax,
            'amount'      => $grand_total,
        ];
    }

    protected function getDocDate(array $doc): string
    {
        return $doc['issued_date'] ?? date('Y-m-d');
    }
}