<?php

namespace App\Services\Automation;

use App\Models\Automation;
use App\Models\AutomationSend;
use App\Models\Customer;
use App\Models\Message;
use App\Services\ConfigService;
use App\Services\CustomerAppNotifyService;
use App\Services\SmsBilling\SmsGatewayService;
use App\Exceptions\SmsBlockedException;
use Illuminate\Support\Facades\Log;

class AutomationSender
{
    public function __construct(
        private readonly SmsGatewayService $sms,
        private readonly CustomerAppNotifyService $notify,
        private readonly ConfigService $config,
    ) {
    }

    public function send(Automation $auto, Customer $customer, string $channel): bool
    {
        if (! $this->maySend($auto, $customer, $channel)) {
            return false;
        }

        $title = $this->render((string) $auto->title, $customer);
        $body = $this->render((string) $auto->body, $customer);

        try {
            if ($channel === AutomationCatalog::CHANNEL_SMS) {
                $mobile = trim((string) $customer->mobile);
                if ($mobile === '') {
                    throw new \RuntimeException('موبایل خالی است');
                }
                $text = $this->ensureAppNameFooter(trim($title."\n".$body));
                $result = $this->sms->sendOrThrow($mobile, $text, 'automation');
                if (! $result->sent) {
                    throw new \RuntimeException($result->errorMessage ?: 'ارسال پیامک ناموفق');
                }
                Message::create([
                    'sms' => $text,
                    'receiver' => $mobile,
                    'platforms' => ($result->provider ?: 'sms').':'.$mobile,
                ]);
            } else {
                $row = $this->notify->notifyCustomer((int) $customer->id, $title, $body, 'info');
                if (! $row) {
                    throw new \RuntimeException('اعلان ساخته نشد');
                }
            }

            $this->log($auto, $customer, $channel, 'sent');
            $auto->increment('sent_count');

            return true;
        } catch (SmsBlockedException $e) {
            $this->log($auto, $customer, $channel, 'failed', 'اعتبار پیامک کافی نیست یا مسدود است');
            $auto->increment('failed_count');
            Log::warning('Automation SMS blocked', ['automation_id' => $auto->id]);

            return false;
        } catch (\Throwable $e) {
            $this->log($auto, $customer, $channel, 'failed', $e->getMessage());
            $auto->increment('failed_count');

            return false;
        }
    }

    public function maySend(Automation $auto, Customer $customer, string $channel): bool
    {
        if (! $auto->usesChannel($channel)) {
            return false;
        }

        $max = $auto->max_sends;
        if ($max !== null && (int) $max > 0) {
            $count = AutomationSend::query()
                ->where('automation_id', $auto->id)
                ->where('customer_id', $customer->id)
                ->where('channel', $channel)
                ->where('status', 'sent')
                ->count();
            if ($count >= (int) $max) {
                return false;
            }
        }

        $cooldown = max(0, (int) $auto->cooldown_hours);
        if ($cooldown > 0) {
            $recent = AutomationSend::query()
                ->where('automation_id', $auto->id)
                ->where('customer_id', $customer->id)
                ->where('channel', $channel)
                ->where('status', 'sent')
                ->where('created_at', '>=', now()->subHours($cooldown))
                ->exists();
            if ($recent) {
                return false;
            }
        }

        return true;
    }

    private function ensureAppNameFooter(string $message): string
    {
        $appName = trim($this->config->getString('name_fa'));
        $trimmed = rtrim($message);
        if ($appName === '') {
            return $trimmed;
        }

        $lines = preg_split('/\R/u', $trimmed) ?: [];
        $last = trim((string) end($lines));
        if ($last === $appName) {
            return $trimmed;
        }

        return $trimmed === '' ? $appName : ($trimmed."\n".$appName);
    }

    private function render(string $text, Customer $customer): string
    {
        $name = trim((string) ($customer->name ?: trim(($customer->fname ?? '').' '.($customer->lname ?? ''))));
        $fname = (string) ($customer->fname ?? '');
        $mobile = (string) ($customer->mobile ?? '');

        // سازگاری با قالب قدیمی {{name}}
        $out = strtr($text, [
            '{{name}}' => $name,
            '{{fname}}' => $fname,
            '{{mobile}}' => $mobile,
        ]);

        // الگوی پیامک/تنظیمات: %نام ، ٪نام ، % name ، %name%
        $out = preg_replace('/[%٪]\s*(?:name|نام)[%٪]?/iu', $name, $out) ?? $out;
        $out = preg_replace('/[%٪]\s*(?:fname|نام_کوچک|نام‌کوچک)[%٪]?/iu', $fname, $out) ?? $out;
        $out = preg_replace('/[%٪]\s*(?:mobile|موبایل)[%٪]?/iu', $mobile, $out) ?? $out;

        return $out;
    }

    private function log(Automation $auto, Customer $customer, string $channel, string $status, ?string $error = null): void
    {
        AutomationSend::create([
            'automation_id' => $auto->id,
            'customer_id' => $customer->id,
            'channel' => $channel,
            'status' => $status,
            'error' => $error,
        ]);
    }
}