<?php

namespace App\Observers;

use App\Models\Medicine;
use App\Models\User;
use App\Models\Setting;
use App\Helpers\WhatsappHelper;
use Illuminate\Support\Facades\Mail;
use App\Mail\LowStockNotification;
use Illuminate\Support\Facades\Log;

class MedicineObserver
{
    /**
     * Handle the Medicine "updated" event.
     */
    public function updated(Medicine $medicine)
    {
        // 1. Validasi: Hanya jalankan jika kolom 'qty' berubah
        if (!$medicine->wasChanged('qty')) {
            return;
        }

        // 2. Cek apakah stok di bawah ambang batas (5)
        if ($medicine->qty < 5) {
            
            // 3. Ambil status Master Switch dari tabel settings
            $settings = Setting::where('group', 'notification')->pluck('value', 'key');
            $isEmailActive = ($settings['notif_email_status'] ?? 'inactive') === 'active';
            $isWaActive = ($settings['notif_wa_status'] ?? 'inactive') === 'active';

            // 4. Cari Admin (Bisa lebih dari satu jika diperlukan)
            $admins = User::where('role', 'admin')->get();

            if ($admins->isEmpty()) {
                Log::warning("Notifikasi stok rendah gagal dikirim: Tidak ada user dengan role admin.");
                return;
            }

            $msg = "⚠️ *STOK KRITIS (earrin cats)*\n\n";
            $msg .= "Obat: {$medicine->nama_obat}\n";
            $msg .= "Sisa: *{$medicine->qty} {$medicine->unit}*\n";
            $msg .= "Segera lakukan restock untuk pasien cattery.";

            foreach ($admins as $admin) {
                // Kirim Email jika aktif
                if ($isEmailActive && $admin->email) {
                    try {
                        Mail::to($admin->email)->send(new LowStockNotification($medicine));
                    } catch (\Exception $e) {
                        Log::error("Gagal mengirim email stok rendah ke {$admin->email}: " . $e->getMessage());
                    }
                }

                // Kirim WhatsApp jika aktif & nomor tersedia
                if ($isWaActive && $admin->phone) {
                    try {
                        WhatsappHelper::send($admin->phone, $msg);
                    } catch (\Exception $e) {
                        Log::error("Gagal mengirim WA stok rendah ke {$admin->phone}: " . $e->getMessage());
                    }
                }
            }
        }
    }
}