<?php

namespace App\Http\Controllers\Chat;

use App\Http\Controllers\Controller;
use App\Models\Customer;
use App\Models\User;
use App\Services\ChatWebhookService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Log;

class SupportChatNotifyController extends Controller
{
    public const FOCUS_CACHE_PREFIX = 'admin_support_focus:';
    public const FOCUS_TTL_SECONDS = 45;

    /**
     * Webhook از ah_chat وقتی اولین پیام خوانده‌نشدهٔ مشتری در اتاق SUPPORT ذخیره شود.
     */
    public function notify(Request $request)
    {
        $secret = (string) self::Config('chat_webhook_secret');
        $secret = app(ChatWebhookService::class)->sanitizeSecret($secret);
        $incoming = app(ChatWebhookService::class)->sanitizeSecret(
            (string) $request->header('X-Chat-Webhook-Secret', '')
        );

        if ($secret === '' || ! hash_equals($secret, $incoming)) {
            Log::warning('support chat notify unauthorized', [
                'has_secret' => $secret !== '',
                'has_header' => $incoming !== '',
            ]);
            return response()->json(['message' => 'unauthorized'], 401);
        }

        if (! self::isSmsNotifEnabled('sms_notif_support_admin')) {
            Log::info('support chat notify skipped: sms_notif_support_admin disabled');
            return response()->json(['ok' => true, 'skipped' => 'disabled']);
        }

        $roomId = trim((string) $request->input('room_id', ''));
        if ($roomId === '') {
            return response()->json(['message' => 'room_id required'], 422);
        }

        if (Cache::has(self::FOCUS_CACHE_PREFIX.$roomId)) {
            Log::info('support chat notify skipped: admin focused', ['room_id' => $roomId]);
            return response()->json(['ok' => true, 'skipped' => 'admin_focused']);
        }

        $customer = Customer::query()
            ->where('chat_room_id', $roomId)
            ->first();

        $name = $customer
            ? trim((string) ($customer->name ?: $customer->username ?: 'مشتری'))
            : 'مشتری';

        if ($name === '') {
            $name = 'مشتری';
        }

        $companyName = trim((string) self::Config('name_fa'));
        if ($companyName === '') {
            $companyName = trim((string) self::Config('name'));
        }
        if ($companyName === '') {
            $companyName = 'پشتیبانی';
        }

        $message = 'شما از '.$name." پیام دارید\n".$companyName;

        $admins = User::where('send_sms', 1)->get();
        if ($admins->isEmpty()) {
            Log::warning('support chat notify: no admins with send_sms=1', ['room_id' => $roomId]);
        }

        try {
            $admins->each(function ($admin) use ($message) {
                if (! empty($admin->mobile)) {
                    $this->send($admin->mobile, $message);
                }
            });
            Log::info('support chat notify SMS sent', [
                'room_id' => $roomId,
                'name' => $name,
                'company' => $companyName,
                'admin_count' => $admins->count(),
            ]);
        } catch (\Throwable $e) {
            Log::warning('support chat SMS notify failed', [
                'room_id' => $roomId,
                'error' => $e->getMessage(),
            ]);
        }

        return response()->json(['ok' => true]);
    }

    /**
     * Heartbeat تمرکز ادمین روی یک اتاق پشتیبانی (یا ترک تمرکز).
     */
    public function focus(Request $request)
    {
        $roomId = trim((string) $request->input('room_id', ''));
        $previousRoomId = trim((string) $request->input('previous_room_id', ''));

        if ($previousRoomId !== '' && $previousRoomId !== $roomId) {
            Cache::forget(self::FOCUS_CACHE_PREFIX.$previousRoomId);
        }

        if ($roomId === '') {
            return response()->json(['ok' => true]);
        }

        Cache::put(self::FOCUS_CACHE_PREFIX.$roomId, true, self::FOCUS_TTL_SECONDS);

        return response()->json(['ok' => true, 'room_id' => $roomId]);
    }

    /**
     * ترک تمرکز روی یک اتاق مشخص.
     */
    public function unfocus(Request $request)
    {
        $roomId = trim((string) $request->input('room_id', ''));
        if ($roomId !== '') {
            Cache::forget(self::FOCUS_CACHE_PREFIX.$roomId);
        }

        return response()->json(['ok' => true]);
    }

    /**
     * ثبت/تازه‌سازی وب‌هوک روی ah_chat (از پنل ادمین).
     * همیشه HTTP 200 — شکست ثبت best-effort است و نباید toast خطای 422 بسازد.
     */
    public function ensureWebhook()
    {
        $result = app(ChatWebhookService::class)->ensureRegisteredDetailed();

        return response()->json([
            'ok' => (bool) ($result['ok'] ?? false),
            'webhook_url' => (string) ($result['webhook_url'] ?? ''),
            'reason' => (string) ($result['reason'] ?? ''),
            'message' => (string) ($result['message'] ?? ''),
            'attempts' => (int) ($result['attempts'] ?? 0),
        ]);
    }
}