<?php

namespace App\Core\Flows;

use App\Services\SiroService;

/**
 * PaymentFlow — Smart Payment Verification
 *
 * Flow: start → await_receipt → finished
 *
 * Automatically:
 *   • Detects country from phone prefix (963→Syria, 962→Jordan)
 *   • Sets payment method (Syria→shamcash, Jordan→cliq)
 *   • Forwards raw receipt image to payment server for AI verification
 *   • Payment server auto-finds the latest pending invoice by phone
 *     → no need for the user to type an invoice number
 */
class PaymentFlow extends BaseFlow
{
    public function handleStep(string $step, array $messageData, array &$context): FlowResult
    {
        $phone = $messageData['phone'] ?? '';
        $text = $messageData['body'] ?? $messageData['text'] ?? '';
        $image = $messageData['image'] ?? '';
        $imageMimeType = $messageData['imageMimeType'] ?? 'image/jpeg';

        switch ($step) {
            // ─────────────────────────────────────────────────
            // START: detect country, set method, ask for receipt
            // ─────────────────────────────────────────────────
            case 'start':
                $country = SiroService::detectCountry($phone);
                $paymentMethod = match ($country) {
                    'jordan' => 'cliq',
                    default => 'shamcash',
                };

                $context['payment_method'] = $paymentMethod;
                $context['country'] = $country;
                $context['user_type'] = 'driver';

                $methodName = match ($paymentMethod) {
                    'cliq' => 'كليك (Cliq)',
                    default => 'شام كاش (ShamCash)',
                };

                return new FlowResult(
                    "أهلاً بك. للتحقق من عملية الدفع:\n"
                    . "💰 طريقة الدفع المتوقعة: {$methodName}\n"
                    . "📍 الدولة: " . ($country === 'syria' ? 'سوريا' : ($country === 'jordan' ? 'الأردن' : $country))
                    . "\n\n📸 يرجى إرسال صورة الإيصال أو وصل التحويل للتحقق منه.",
                    "await_receipt"
                );

            // ─────────────────────────────────────────────────
            // AWAIT_RECEIPT: collect receipt image
            // ─────────────────────────────────────────────────
            case 'await_receipt':
                if (empty($image)) {
                    return new FlowResult(
                        "الرجاء إرسال صورة واضحة لوصل الدفع أو صورة الشاشة:", 
                        "await_receipt"
                    );
                }

                return $this->sendToVerification($phone, $context, $image, $imageMimeType);

            default:
                return new FlowResult("حدث خطأ في المسار.", "finished", true);
        }
    }

    /**
     * Forward receipt image + phone to payment server for AI verification.
     * Payment server internally resolves phone→driverID via Siro backend.
     * Nabeh only makes ONE API call (to payment server).
     */
    private function sendToVerification(
        string $phone,
        array &$context,
        string $image,
        string $imageMimeType
    ): FlowResult {
        $companyId = $context['company_id'] ?? 1;

        if (strpos($imageMimeType, ';') !== false) {
            $imageMimeType = trim(explode(';', $imageMimeType)[0]);
        }

        $result = \App\Controllers\WhatsAppController::verifyPaymentSlipStatic(
            companyId: $companyId,
            phone: $phone,
            jsonStr: '',
            userType: $context['user_type'] ?? 'driver',
            paymentMethod: $context['payment_method'] ?? 'shamcash',
            invoiceNumber: '',
            receiptImage: $image,
            imageMimeType: $imageMimeType,
        );

        if ($result) {
            return new FlowResult($result, "finished", true);
        }

        return new FlowResult(
            "لم نتمكن من التحقق من الدفع حالياً. يرجى المحاولة مرة أخرى أو التواصل مع الدعم الفني.",
            "finished",
            true
        );
    }
}