<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\User;
use App\Models\Notification;
use App\Models\Timetable;  
use App\Models\StudentPortalLog;  
use Exception;

class AdminDashboardController extends Controller
{
    public function index()
    {
        try {
            // 1. Fetch Users
            $users = User::all();

            // 2. Fetch Notifications
            $notifications = Notification::orderBy('created_at', 'desc')->get();
            $unreadNotifications = Notification::where('is_read', false)->count();

            // 3. Fetch Timetable Slots Count
            $totalTimetableSlots = class_exists(Timetable::class) ? Timetable::count() : 0;

            // 4. Fetch Portal Logs with user eager loaded
            $portalLogs = class_exists(StudentPortalLog::class) 
                ? StudentPortalLog::with('user')->get() 
                : [];

            return view('admin.AdminDashboard', compact(
                'users',
                'notifications',
                'unreadNotifications',
                'totalTimetableSlots',
                'portalLogs'
            ));

        } catch (Exception $e) {
            \Log::error('Admin Dashboard Error: ' . $e->getMessage());

            if (config('app.debug')) {
                throw $e;
            }

            return back()->with('error', 'Something went wrong: ' . $e->getMessage());
        }
    }

    // Notifications Store
    public function store(Request $request)
    {
        $request->validate([
            'title' => 'required|string|max:255',
            'message' => 'required|string',
            'type' => 'required|in:info,success,warning',
        ]);

        Notification::create([
            'title' => $request->title,
            'message' => $request->message,
            'type' => $request->type,
            'is_read' => false,
        ]);

        return redirect()->back()->with('success', 'Notification created successfully!');
    }

    // Mark as Read
    public function markAsRead($id)
    {
        $notification = Notification::findOrFail($id);
        $notification->update(['is_read' => true]);

        return redirect()->back()->with('success', 'Notification marked as read!');
    }

    // Update Notification
    public function update(Request $request, $id)
    {
        $request->validate([
            'title' => 'required|string|max:255',
            'message' => 'required|string',
            'type' => 'required|in:info,success,warning',
        ]);

        $notification = Notification::findOrFail($id);
        $notification->update($request->only(['title', 'message', 'type']));

        return redirect()->back()->with('success', 'Notification updated successfully!');
    }

    // Delete Notification
    public function destroy($id)
    {
        $notification = Notification::findOrFail($id);
        $notification->delete();

        return redirect()->back()->with('success', 'Notification deleted successfully!');
    }

    // Store Student Portal Log
    public function storePortalLog(Request $request)
    {
        $request->validate([
            'user_id' => 'required|exists:users,id',
        ]);

        return $this->sendToPortalLog($request->user_id);
    }

    // Send User to Portal Log
    public function sendToPortalLog($userId)
    {
                    try 
                    {
                            $user = User::findOrFail($userId);

                            
                            $exists = StudentPortalLog::where('user_id', $user->id)->exists();
                            if ($exists) {
                                return redirect()->back()->with('error', 'This user is already in Portal Logs!');
                            }

                            
                            StudentPortalLog::create([
                                'user_id'    => $user->id,
                                'first_name' => $user->first_name ?? '',
                                'last_name'  => $user->last_name ?? '',
                                'email'      => $user->email,
                                'phone'      => $user->phone ?? null,
                                'pin'        => null,
                            ]);

                            return redirect()->back()->with('success', 'User successfully added to Portal Logs!');
                            
                    }
                    catch (Exception $e) {
                            \Log::error('Send to Portal Log Error: ' . $e->getMessage());

                            return redirect()->back()->with('error', 'Failed to add user to Portal Log: ' . $e->getMessage());
                        }
    }

    // Update or Delete User Portal PIN
    public function updatePin(Request $request, $id)
    {
        $request->validate([
            'pin' => 'nullable|string|max:20',
        ]);

        try {
            $portalLog = StudentPortalLog::findOrFail($id);
            $portalLog->pin = $request->filled('pin') ? $request->pin : null;
            $portalLog->save();

            $message = $request->filled('pin') 
                ? 'Portal PIN updated successfully!' 
                : 'Portal PIN deleted successfully!';

            return redirect()->back()->with('success', $message);

        } catch (Exception $e) {
            \Log::error('Update PIN Error: ' . $e->getMessage());
            return redirect()->back()->with('error', 'Failed to update PIN: ' . $e->getMessage());
        }
    }

    // =========================================================================
    // STUDENT PORTAL LOG DELETION ONLY 
    // =========================================================================

     
    
public function destroyPortalLog($id)
{
    try {
        $portalLog = StudentPortalLog::findOrFail($id);
        $portalLog->delete(); 

        return redirect()->back()->with('success', 'Student Portal access record deleted successfully!');
    } catch (Exception $e) {
        \Log::error('Delete Portal Log Error: ' . $e->getMessage());
        return redirect()->back()->with('error', 'Failed to remove from Student Portal: ' . $e->getMessage());
    }
}
}