<?php

namespace ESI_PEPPOL\helpers;

class PEPPOL_Woo_Helper {

    public static function my_get_item_tax_details( \WC_Order_Item $item ): array {
        $taxes = $item->get_taxes(); // ['total' => [rate_id => amount], 'subtotal' => ...]
        $out = [];
    
        if ( ! empty( $taxes['total'] ) ) {
            foreach ( $taxes['total'] as $rate_id => $tax_amount ) {
                $tax_amount = floatval( $tax_amount );
                if ( $tax_amount == 0 ) continue;
    
                $rate = \WC_Tax::_get_tax_rate( $rate_id );
    
                $out[] = [
                    'rate_id' => (int) $rate_id,
                    'percent' => floatval( $rate['tax_rate'] ),
                    'name'    => $rate['tax_rate_name'],
                    'class'   => $rate['tax_rate_class'], // 'standard', 'reduced-rate', etc.
                    'amount'  => $tax_amount,
                    'compound'=> (bool) $rate['tax_rate_compound'],
                ];
            }
        }
    
        return $out;
    }

    public static function esi_get_order_vat_number( $order ) {

        if ( is_numeric( $order ) ) {
            $order = wc_get_order( $order );
        }
        
        if ( ! $order instanceof \WC_Order ) {
            return '';
        }
    
        // 1) Clés les plus courantes (ajuste/complète si besoin)
        $known_keys = [
            '_billing_vat_number',
            'billing_vat_number',
            '_vat_number',
            'vat_number',
            '_billing_vat',
            'billing_vat',
            '_billing_tva',
            'billing_tva',
            '_tva',
            'tva',
            'eu_vat_number',
            '_eu_vat_number',
            'vat_id',
            '_vat_id',
        ];
    
        foreach ( $known_keys as $key ) {
            $val = $order->get_meta( $key, true );
            if ( ! empty( $val ) ) {
                return is_string($val) ? trim($val) : $val;
            }
        }
    
        // 2) Fallback: scan des meta keys contenant vat/tva
        $vat_candidates = [];
        foreach ( $order->get_meta_data() as $meta ) {
            $k = (string) $meta->key;
            if ( preg_match('/\b(vat|tva)\b/i', $k) || preg_match('/(vat|tva)/i', $k) ) {
                $v = $meta->value;
                if ( is_string($v) ) {
                    $v = trim($v);
                }
                if ( ! empty($v) ) {
                    $vat_candidates[$k] = $v;
                }
            }
        }
    
        // Si plusieurs candidats, tu peux choisir une règle
        // Ici: si un seul => return, sinon priorise ceux qui contiennent "billing"
        if ( count($vat_candidates) === 1 ) {
            return reset($vat_candidates);
        }
        foreach ( $vat_candidates as $k => $v ) {
            if ( stripos($k, 'billing') !== false ) {
                return $v;
            }
        }
    
        // sinon le 1er trouvé
        return ! empty($vat_candidates) ? reset($vat_candidates) : '';
    }
    
}