<?php

namespace App\Services;

use App\Http\Controllers\Admin\ZarinController;
use App\Models\Customer;
use App\Models\Zarin;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Schema;

class ZarinSyncService
{
    public const STATUS_PENDING = 'pending';
    public const STATUS_SUCCESS = 'success';
    public const STATUS_FAILED = 'failed';

    public function responseOk(mixed $response): bool
    {
        if (! is_array($response)) {
            return false;
        }

        if ($this->hasNumericIdKey($response)) {
            return true;
        }

        $data = $response['data'] ?? null;
        if (! is_array($data)) {
            return false;
        }

        $row = array_is_list($data) ? ($data[0] ?? null) : $data;

        return is_array($row) && $this->hasNumericIdKey($row);
    }

    private function hasNumericIdKey(array $row): bool
    {
        foreach (['idFactor', 'idSanad', 'pkRadifSanad', 'idHesab', 'OK'] as $key) {
            if (! array_key_exists($key, $row)) {
                continue;
            }
            $value = $row[$key];
            if ($value === null || $value === '' || $value === false) {
                continue;
            }
            if (is_numeric($value) || (is_string($value) && trim($value) !== '')) {
                return true;
            }
        }

        return false;
    }

    public function buildLog(mixed $response = null, ?string $extra = null): string
    {
        $parts = array_filter([
            $extra,
            is_array($response) ? json_encode($response, JSON_UNESCAPED_UNICODE) : (is_string($response) ? $response : null),
        ]);

        return implode("\n", $parts);
    }

    public function markSuccess(Zarin $row, array $response, ?array $payload = null): void
    {
        $flat = $this->flattenResponse($response);

        $zarinId = $flat['OK']
            ?? $flat['idFactor']
            ?? $flat['idSanad']
            ?? $flat['pkRadifSanad']
            ?? $flat['idHesab']
            ?? null;

        $shFactor = $flat['Sh_factor']
            ?? $flat['pkRadifSanad']
            ?? $flat['idRadifSanad']
            ?? null;

        $update = [
            'sh_factor' => $shFactor !== null ? (string) $shFactor : null,
            'zarin_id' => $zarinId !== null ? (string) $zarinId : null,
            'factor_number' => isset($flat['Factor_Number']) ? (string) $flat['Factor_Number'] : (isset($flat['idFactor']) ? (string) $flat['idFactor'] : null),
            'res' => json_encode($response, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT),
            'sync_status' => self::STATUS_SUCCESS,
            'sync_log' => null,
        ];

        if ($payload !== null) {
            $update['data'] = json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
        }

        if ($this->hasSyncColumns()) {
            Zarin::where('id', $row->id)->update($update);
        } else {
            unset($update['sync_status'], $update['sync_log']);
            Zarin::where('id', $row->id)->update($update);
        }
    }

    public function markFailed(Zarin $row, mixed $response = null, ?string $extra = null): void
    {
        $update = [
            'res' => is_array($response)
                ? json_encode($response, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)
                : (is_string($response) ? $response : null),
        ];

        if ($this->hasSyncColumns()) {
            $update['sync_status'] = self::STATUS_FAILED;
            $update['sync_log'] = $this->buildLog($response, $extra);
        }

        Zarin::where('id', $row->id)->update($update);
    }

    public function isFailed(Zarin $row): bool
    {
        if ($this->hasSyncColumns()) {
            return ($row->sync_status ?? null) === self::STATUS_FAILED
                || (empty($row->zarin_id) && ($row->sync_status ?? null) !== self::STATUS_SUCCESS);
        }

        return empty($row->zarin_id);
    }

    public function registerOnCreate(Customer $customer): void
    {
        if (! empty($customer->moshtari_code) || ! $this->isSyncEnabled()) {
            return;
        }

        $customerId = (int) $customer->id;

        dispatch(function () use ($customerId) {
            $service = app(ZarinSyncService::class);
            $customer = Customer::find($customerId);
            if ($customer === null || ! empty($customer->moshtari_code) || ! $service->isSyncEnabled()) {
                return;
            }

            try {
                $result = $service->registerCustomer($customer);
                if (! ($result['ok'] ?? false)) {
                    Log::warning('Zarin auto-register on customer create failed', [
                        'customer_id' => $customerId,
                        'message' => $result['message'] ?? null,
                    ]);
                }
            } catch (\Throwable $e) {
                Log::warning('Zarin auto-register on customer create threw', [
                    'customer_id' => $customerId,
                    'error' => $e->getMessage(),
                ]);
            }
        })->afterResponse();
    }

    public function registerCustomer(Customer $customer): array
    {
        $customer->refresh();

        if (! empty($customer->moshtari_code)) {
            return [
                'ok' => true,
                'message' => 'مشتری قبلاً در زرین ثبت شده است',
                'moshtari_code' => $customer->moshtari_code,
            ];
        }

        $controller = app(ZarinController::class);
        $result = $controller->createCustomerInZarin($customer->id);
        $customer->refresh();

        // createCustomerInZarin در موفقیت idHesab برمی‌گرداند (عدد یا رشتهٔ عددی مثل "426")
        // و در شکست پیام فارسی/خطا — قبلاً is_string همهٔ موفقیت‌های رشته‌ای را خطا می‌گرفت.
        if (! empty($customer->moshtari_code) || is_numeric($result)) {
            $code = $customer->moshtari_code ?: $result;

            return [
                'ok' => true,
                'message' => 'مشتری با موفقیت در زرین ثبت شد',
                'moshtari_code' => $code,
            ];
        }

        return [
            'ok' => false,
            'message' => is_string($result) && $result !== ''
                ? $result
                : 'ثبت مشتری در زرین ناموفق بود',
        ];
    }

    public function retry(Zarin $row): array
    {
        if (! $this->isFailed($row) && ! empty($row->zarin_id)) {
            return ['ok' => false, 'message' => 'این سند قبلاً در زرین ثبت شده است'];
        }

        $payload = json_decode((string) $row->data, true) ?: [];
        $handler = $payload['handler'] ?? $this->inferHandler($row);
        $controller = app(ZarinController::class);

        $result = match ($handler) {
            'wallet' => $controller->wallet(array_merge($payload, ['_retry_zarin_id' => $row->id]), $row),
            'walletGold' => $controller->walletGold(array_merge($payload, ['_retry_zarin_id' => $row->id]), $row),
            'storeTrade' => $controller->storeTrade(array_merge($payload, ['_retry_zarin_id' => $row->id]), $row),
            'goldReward' => $controller->goldReward(array_merge($payload, ['_retry_zarin_id' => $row->id]), $row),
            default => false,
        };

        $row->refresh();

        if ($result !== false && ! empty($row->zarin_id)) {
            return ['ok' => true, 'message' => 'سند با موفقیت در زرین ثبت شد', 'zarin' => $row];
        }

        return [
            'ok' => false,
            'message' => $row->sync_log ?: 'ارسال مجدد به زرین ناموفق بود',
            'zarin' => $row,
        ];
    }

    private function inferHandler(Zarin $row): string
    {
        if ($row->order_id) {
            return 'storeTrade';
        }

        if ($row->type === 'ريال') {
            return 'wallet';
        }

        $desc = (string) $row->desc;

        if (str_contains($desc, 'شارژ') || str_contains($desc, 'دشارژ') || str_contains($desc, 'برداشت از کیف') || str_contains($desc, 'شارژ کیف')) {
            return 'walletGold';
        }

        // نوع تعدادی ذخیره‌شده روی ردیف sync
        $type = (string) $row->type;
        if (in_array($type, ['سکه', 'شمش', 'کارساخته'], true)) {
            return 'walletGold';
        }

        return 'goldReward';
    }

    public function isSyncEnabled(): bool
    {
        $config = app(ConfigService::class);

        return $config->isZarinAccounting()
            && trim($config->getString('zarin_api', '')) !== ''
            && trim($config->getString('zarin_token', '')) !== '';
    }

    private function flattenResponse(array $response): array
    {
        $data = $response['data'] ?? null;
        if (is_array($data)) {
            $row = array_is_list($data) ? ($data[0] ?? []) : $data;
            if (is_array($row)) {
                return array_merge($response, $row);
            }
        }

        return $response;
    }

    private function hasSyncColumns(): bool
    {
        return Schema::hasTable('zarin') && Schema::hasColumn('zarin', 'sync_status');
    }
}