<?php

declare(strict_types=1);

namespace app\common\service\pharmacy;

use DomainException;
use InvalidArgumentException;

final class EjPharmacyPayload
{
    /**
     * @param array<string,mixed> $order
     * @param array<string,mixed> $prescription
     * @param array<int,string> $medicineMappings
     * @return array<string,mixed>
     */
    public static function build(array $order, array $prescription, array $medicineMappings, int $revision): array
    {
        $orderNo = trim((string) ($order['order_no'] ?? ''));
        if ($orderNo === '') {
            throw new InvalidArgumentException('order_no is required');
        }
        $herbs = $prescription['herbs'] ?? [];
        if (!is_array($herbs) || $herbs === []) {
            throw new InvalidArgumentException('prescription herbs are required');
        }
        $medicines = [];
        foreach ($herbs as $herb) {
            if (!is_array($herb)) {
                continue;
            }
            $medicineId = (int) ($herb['medicine_id'] ?? $herb['id'] ?? 0);
            $name = trim((string) ($herb['name'] ?? $herb['title'] ?? ''));
            $medicineCode = trim((string) ($medicineMappings[$medicineId] ?? ''));
            if ($medicineId <= 0 || $medicineCode === '') {
                throw new DomainException('Unmapped medicine: ' . ($name !== '' ? $name : (string) $medicineId));
            }
            $quantity = (float) ($herb['dose'] ?? $herb['dosage'] ?? $herb['quantity'] ?? 0);
            if ($quantity <= 0) {
                throw new InvalidArgumentException('Medicine quantity must be positive: ' . $name);
            }
            $medicines[] = [
                'source_medicine_id' => (string) $medicineId,
                'medicine_code' => $medicineCode,
                'name' => $name,
                'quantity' => number_format($quantity, 4, '.', ''),
                'unit' => trim((string) ($herb['unit'] ?? '克')) ?: '克',
                'usage' => trim((string) ($herb['usage'] ?? '')),
            ];
        }
        if ($medicines === []) {
            throw new InvalidArgumentException('prescription herbs are required');
        }

        return [
            'source_system' => 'zyt',
            'source_order_no' => $orderNo,
            'source_revision' => max($revision, 1),
            'patient' => [
                'source_patient_id' => (string) ($prescription['patient_id'] ?? ''),
                'name' => trim((string) ($prescription['patient_name'] ?? $order['recipient_name'] ?? '')),
                'id_card' => trim((string) ($prescription['id_card'] ?? '')),
                'mobile' => trim((string) ($prescription['phone'] ?? $order['recipient_phone'] ?? '')),
            ],
            'shipping' => [
                'recipient_name' => trim((string) ($order['recipient_name'] ?? $prescription['patient_name'] ?? '')),
                'recipient_mobile' => trim((string) ($order['recipient_phone'] ?? $prescription['phone'] ?? '')),
                'province' => trim((string) ($order['shipping_province'] ?? '')),
                'city' => trim((string) ($order['shipping_city'] ?? '')),
                'district' => trim((string) ($order['shipping_district'] ?? '')),
                'address' => trim((string) ($order['shipping_address'] ?? '')),
            ],
            'prescription' => [
                'source_prescription_id' => (string) ($prescription['id'] ?? ''),
                'diagnosis' => trim((string) (
                    $prescription['clinical_diagnosis']
                    ?? $prescription['diagnosis']
                    ?? $prescription['diagnosis_name']
                    ?? ''
                )),
                'processing_type' => trim((string) ($prescription['processing_type'] ?? 'decoction')) ?: 'decoction',
                'dose_count' => max((int) ($order['dose_count'] ?? $prescription['dose_count'] ?? 1), 1),
                'doctor' => [
                    'source_doctor_id' => (string) ($prescription['creator_id'] ?? $prescription['doctor_id'] ?? ''),
                    'name' => trim((string) ($prescription['doctor_name'] ?? '')),
                ],
                'doctor_signature' => is_array($prescription['doctor_signature'] ?? null)
                    ? $prescription['doctor_signature']
                    : [],
                'medicines' => $medicines,
                'instructions' => trim((string) (
                    $prescription['usage_instruction']
                    ?? $prescription['instructions']
                    ?? $prescription['advice']
                    ?? ''
                )),
            ],
        ];
    }
}