<?php

namespace App\Http\Controllers;

use App\ShorakaTransaction;
use App\Services\ShorakaService;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;
use RuntimeException;
use Throwable;

class ShorakaController extends Controller
{
    /**
     * Hantar transaksi pembiayaan pelanggan ke Shoraka.
     */
    public function submit(
        Request $request,
        ShorakaService $shoraka
    ) {
        /*
         * Validation untuk Lumen 7.
         */
        $validated = $this->validate($request, [
            'norujukan' =>
                'required|string',

            'ownership' =>
                'required|string',

            'order_amount' =>
                'required|numeric|min:0.01',

            'murabaha_amount' =>
                'required|numeric|min:0.01',

            'tenor_other' =>
                'required|integer|min:1',
        ]);

        /*
         * Jangan hubungi Shoraka selagi credentials
         * belum diterima atau belum dimasukkan.
         */
        if (
            empty(config('services.shoraka.api_id')) ||
            empty(config('services.shoraka.secret_key'))
        ) {
            return response()->json([
                'success' => false,
                'message' =>
                    'API ID dan Secret Key Shoraka belum dikonfigurasi.',
            ], 503);
        }

        /*
         * Semak sama ada nombor rujukan yang sama
         * sudah pernah berjaya dihantar.
         */
        $existing = ShorakaTransaction::where(
            'norujukan',
            $validated['norujukan']
        )->first();

        if (
            $existing &&
            !empty($existing->order_id)
        ) {
            return response()->json([
                'success' => false,
                'message' =>
                    'Transaksi ini telah dihantar ke Shoraka sebelum ini.',
                'data' => [
                    'norujukan' =>
                        $existing->norujukan,

                    'order_id' =>
                        $existing->order_id,

                    'status' =>
                        $existing->status,
                ],
            ], 409);
        }

        /*
         * Sediakan data mengikut format Shoraka.
         */
        $payload = [
            'product_type' =>
                'FINANCING',

            /*
             * Kod komoditi perlu disahkan
             * dengan pihak Shoraka.
             */
            'commodity_type' =>
                '000-COPPER',

            /*
             * Nama pelanggan.
             */
            'ownership' =>
                $validated['ownership'],

            /*
             * Nombor rujukan pembiayaan eRahn.
             */
            'ownership_doc_no' =>
                $validated['norujukan'],

            /*
             * Format yang diminta Shoraka:
             * DD/MM/YYYY
             */
            'value_date' =>
                Carbon::now()->format('d/m/Y'),

            'order_currency' =>
                'MYR',

            'order_amount' =>
                $validated['order_amount'],

            'murabaha_amount' =>
                $validated['murabaha_amount'],

            /*
             * Sila sahkan dengan Shoraka sama ada
             * nilai sebenar ialah OTHER atau OTHERS.
             */
            'tenor' =>
                'OTHERS',

            'tenor_other' =>
                $validated['tenor_other'],

            'tenor_other_unit' =>
                'MONTH',

            'order_type' =>
                'Buy & Sell',
        ];

        /*
         * Simpan rekod awal sebelum request dihantar.
         */
        $transaction = ShorakaTransaction::updateOrCreate(
            [
                'norujukan' =>
                    $validated['norujukan'],
            ],
            [
                'status' =>
                    'PENDING',

                'product_type' =>
                    $payload['product_type'],

                'commodity_type' =>
                    $payload['commodity_type'],

                'ownership_name' =>
                    $payload['ownership'],

                'ownership_doc_no' =>
                    $payload['ownership_doc_no'],

                'order_amount' =>
                    $payload['order_amount'],

                'murabaha_amount' =>
                    $payload['murabaha_amount'],

                'request_payload' =>
                    $payload,

                'error_message' =>
                    null,
            ]
        );

        try {
            /*
             * Tambah bilangan percubaan request.
             */
            $transaction->increment(
                'attempt_count'
            );

            /*
             * Hantar order kepada API Shoraka.
             */
            $response = $shoraka->submitOrder(
                $payload
            );

            /*
             * Shoraka mesti memberikan orderId.
             */
            if (empty($response['orderId'])) {
                throw new RuntimeException(
                    'Shoraka tidak memberikan orderId.'
                );
            }

            $status = isset($response['status'])
                ? $response['status']
                : 'SUBMITTED';

            /*
             * Simpan respons Shoraka.
             */
            $transaction->update([
                'order_id' =>
                    $response['orderId'],

                'status' =>
                    $status,

                'certificate_url' =>
                    isset($response['certificateUrl'])
                        ? $response['certificateUrl']
                        : null,

                'response_payload' =>
                    $response,

                'submitted_at' =>
                    Carbon::now(),

                'completed_at' =>
                    $status === 'Completed'
                        ? Carbon::now()
                        : null,

                'error_message' =>
                    null,
            ]);

            return response()->json([
                'success' => true,

                'message' =>
                    'Order berjaya dihantar ke Shoraka.',

                'data' => [
                    'norujukan' =>
                        $transaction->norujukan,

                    'order_id' =>
                        $transaction->order_id,

                    'status' =>
                        $transaction->status,

                    'certificate_url' =>
                        $transaction->certificate_url,
                ],
            ], 200);
        } catch (Throwable $exception) {
            /*
             * Simpan status gagal.
             */
            $transaction->update([
                'status' =>
                    'FAILED',

                'error_message' =>
                    $exception->getMessage(),
            ]);

            /*
             * Rekodkan ralat tanpa API Secret Key.
             */
            Log::error(
                'Shoraka order submission failed',
                [
                    'norujukan' =>
                        $validated['norujukan'],

                    'message' =>
                        $exception->getMessage(),
                ]
            );

            return response()->json([
                'success' => false,

                'message' =>
                    'Order gagal dihantar ke Shoraka.',

                /*
                 * Paparkan error untuk UAT sahaja.
                 * Buang field ini semasa production.
                 */
                'error' =>
                    $exception->getMessage(),
            ], 502);
        }
    }
}