<?php

namespace App\Http\Controllers\Forms;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Models\FormMeetingSeminar;
use App\Models\Rayon;
use Illuminate\Support\Facades\DB;
use App\Models\Region;
use App\Models\Cabang;
use App\Models\UserHasCabang;
use App\Models\Kategori;
use App\Helpers\NextCloudHelper;
use Illuminate\Support\Str;
use Illuminate\Support\Facades\Mail;
use App\Mail\ExpenseApproved;
use App\Mail\ExpenseApproved2;
use App\Mail\ExpenseRejected;
use App\Mail\ExpenseCreated;
use App\Mail\FinalApprove;
use App\Helpers\WhatsappHelper;
use App\Helpers\AuditTrailHelper;
use App\Models\Admin;
use App\Helpers\BudgetHelper;
use App\Helpers\NotificationHelper;
use App\Helpers\OutstandingHelper;
use Illuminate\Support\Facades\Log;
use App\Services\BrevoService;
use App\Services\AttachmentService;
use App\Enums\AttachmentTableName;
use App\Models\AttachmentForm;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\ValidationException;
use Carbon\Carbon;

class FormMeetingSeminarController extends Controller
{
  protected AttachmentService $attachmentService;

  /**
   * @var array<string,string>
   */
  protected array $attachmentCategories = [
    'bukti_allowance' => 'Bukti Allowance',
    'bukti_transport_ankot' => 'Bukti Transport Antar Kota',
    'bukti_hotel' => 'Bukti Hotel',
  ];

  /**
   * Blocked file extensions (case insensitive).
   *
   * @var array<int,string>
   */
  protected array $blockedExtensions = ['exe', 'dll', 'sh', 'bat', 'cmd', 'msi'];

  /**
   * Image extensions that can be previewed inline.
   *
   * @var array<int,string>
   */
  protected array $imageExtensions = ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp'];

  public function __construct(AttachmentService $attachmentService)
  {
    $this->attachmentService = $attachmentService;
    view()->share('meetingAttachmentCategories', $this->attachmentCategories);
    view()->share('meetingAttachmentCategoryKeys', array_keys($this->attachmentCategories));
    view()->share('meetingBlockedExtensions', $this->blockedExtensions);
  }

  public function index()
  {
    $this->checkAuthorization(auth()->user(), ['forms.meeting.view']);

    $role = auth()->user()->getRoleNames()[0];
    $startDay = (int) env('STARTING_DATE', 11);
    $closingDay = (int) env('CLOSING_DATE', 10);
    $userRegionData = auth()->user()->getMyCabangAndRegionId();
    $regionContextId = $userRegionData['region'] !== '-' ? $userRegionData['region'] : null;
    $cabangContextId = $userRegionData['cabang'] !== '-' ? $userRegionData['cabang'] : null;

    // Referensi waktu sekarang
    $now = Carbon::now();

    // Determine the period
    if ($now->day >= $startDay) {
      $currentPeriodStartDate = Carbon::create($now->year, $now->month, $startDay)->startOfDay();
      $currentPeriodClosingDate = Carbon::create($now->copy()->addMonth()->year, $now->copy()->addMonth()->month, $closingDay)->endOfDay();
    } else {
      $currentPeriodStartDate = Carbon::create($now->copy()->subMonth()->year, $now->copy()->subMonth()->month, $startDay)->startOfDay();
      $currentPeriodClosingDate = Carbon::create($now->year, $now->month, $closingDay)->endOfDay();
    }

    // Calculate the actual start date for data retrieval (1 month before currentPeriodStartDate)
    $dataRetrievalStartDate = $currentPeriodStartDate->copy()->subMonth()->subDay()->startOfDay();

    $forms = FormMeetingSeminar::whereBetween('tanggal', [$dataRetrievalStartDate, $currentPeriodClosingDate])
      ->orderBy('tanggal', 'desc')
      ->with('user')
      ->get();

    $availableBudget = null;
    $periodeMonth = strtolower($currentPeriodStartDate->format('F'));
    $periodeYear = (int) $currentPeriodStartDate->format('Y');

    if ($role == 'Admin Region' || $role == 'Marketing Operational Manager Region') {
      if ($regionContextId) {
        $users = UserHasCabang::whereHas('cabang', function ($query) use ($regionContextId) {
          $query->where('region_id', $regionContextId);
        })->get();

        $userIds = $users->pluck('user_id')->toArray();
        $forms = $forms->whereIn('user_id', $userIds);
      }
    } elseif ($role == 'Area Manager Cabang') {
      if ($cabangContextId) {
        $users = UserHasCabang::where('cabang_id', $cabangContextId)->get();
        $userIds = $users->pluck('user_id')->toArray();
        $forms = $forms->whereIn('user_id', $userIds);

        $availableBudget = BudgetHelper::getAvailableBudget($cabangContextId, $periodeMonth, $periodeYear);
      }
    } elseif ($role == 'Medical Representatif') {
      $forms = $forms->where('user_id', auth()->user()->id);
      $cabang_id = UserHasCabang::where('user_id', auth()->user()->id)->first()?->cabang_id;

      if ($cabang_id) {
        $availableBudget = BudgetHelper::getAvailableBudget($cabang_id, $periodeMonth, $periodeYear);
      }
    }

    $outstandingForms = OutstandingHelper::filterForms(
      $forms,
      $role,
      $currentPeriodStartDate,
      $currentPeriodClosingDate,
      [
        'region_id' => $regionContextId,
        'cabang_id' => $cabangContextId,
      ]
    );

    session()->put('redirect_url', route('forms.meeting'));

    return view('backend.pages.forms.meeting.index', [
      'forms' => $forms,
      'availableBudget' => $availableBudget,
      'outstandingCount' => $outstandingForms->count(),
      'outstandingTotal' => $outstandingForms->sum('total'),
      'outstandingIds' => $outstandingForms->pluck('id')->toArray(),
    ]);
  }

  public function detail($id)
  {
    $this->checkAuthorization(auth()->user(), ['forms.meeting.view']);

    $form = FormMeetingSeminar::with(['user', 'attachments'])->findOrFail($id);
    $attachments = $this->formatAttachmentCollection($form);

    $form->bukti_allowance = $this->getAttachmentDownloadUrlByCategory($attachments, 'bukti_allowance');
    $form->bukti_transport_ankot = $this->getAttachmentDownloadUrlByCategory($attachments, 'bukti_transport_ankot');
    $form->bukti_hotel = $this->getAttachmentDownloadUrlByCategory($attachments, 'bukti_hotel');
    $form->setAttribute('formatted_attachments', $attachments);

    return response()->json($form);
  }

  public function view($id)
  {
    $this->checkAuthorization(auth()->user(), ['forms.meeting.view']);

    $form = FormMeetingSeminar::with(['user', 'attachments'])->findOrFail($id);
    $attachments = $this->formatAttachmentCollection($form);

    return view('backend.pages.forms.meeting.view', [
      'form' => $form,
      'attachments' => $attachments,
    ]);
  }

	public function create()
	{
    $this->checkAuthorization(auth()->user(), ['forms.meeting.create']);

		return view('backend.pages.forms.meeting.create');
	}

	public function store(Request $request)
  {
    $this->checkAuthorization(auth()->user(), ['forms.meeting.create']);

    $validator = Validator::make($request->all(), [
      'tanggal' => 'required|date',
      'allowance' => 'nullable|numeric|min:0',
      'transport_ankot' => 'nullable|numeric|min:0',
      'hotel' => 'nullable|numeric|min:0',
      'attachments' => 'nullable|array',
      'attachments.*.file_category' => 'nullable|string|in:' . implode(',', array_keys($this->attachmentCategories)),
      'attachments.*.file_path' => 'nullable|file', // 10 MB
    ]);
    $this->addAttachmentValidationRules($validator, $request);
    $validator->validate();

    $tanggal = Carbon::parse($request->tanggal);
    $startDay = (int) env('STARTING_DATE', 11);
    $closingDay = (int) env('CLOSING_DATE', 10);
    $now = Carbon::now();

    // Tentukan periode aktif berdasarkan tanggal saat ini
    if ($now->day >= $startDay) {
      $startDate = Carbon::create($now->year, $now->month, $startDay);
      $closingDate = Carbon::create($now->copy()->addMonth()->year, $now->copy()->addMonth()->month, $closingDay);
    } else {
      $startDate = Carbon::create($now->copy()->subMonth()->year, $now->copy()->subMonth()->month, $startDay);
      $closingDate = Carbon::create($now->year, $now->month, $closingDay);
    }

    // Validasi apakah tanggal pengajuan masuk ke periode saat ini
    if ($tanggal->lt($startDate) || $tanggal->gt($closingDate)) {
      session()->flash('error', "Gagal, tanggal tidak berada dalam periode input: {$startDate->format('d M')} - {$closingDate->format('d M')}");
      return redirect()->back();
    }

    $cabang = UserHasCabang::with('cabang')->where('user_id', auth()->user()->id)->first()?->cabang;
    if (!$cabang) {
      session()->flash('error', 'Data cabang tidak ditemukan.');
      return redirect()->back();
    }

    $region = Region::find($cabang->region_id);
    $kategori = Kategori::where('name', 'Meeting / Seminar')->first();

    // Hitung periode dari tanggal input (bukan dari today)
    if ($tanggal->day >= $startDay) {
      $periodeDate = Carbon::create($tanggal->year, $tanggal->month, $startDay);
    } else {
      $periodeDate = Carbon::create($tanggal->copy()->subMonth()->year, $tanggal->copy()->subMonth()->month, $startDay);
    }

    $periodeMonth = strtolower($periodeDate->format('F'));
    $periodeYear = (int) $periodeDate->format('Y');

    $folderPath = '/expense/' . $region->code . '/' . $cabang->code . '/meeting';

    // Generate nomor expense
    $sequence_number = FormMeetingSeminar::withTrashed()
      ->where('expense_number', 'like', $region->code . '-' . $cabang->code . '-MTG-' . date('ym') . '%')
      ->count() + 1;

    $formatted_sequence_number = str_pad($sequence_number, 4, '0', STR_PAD_LEFT);
    $expense_number = $region->code . '-' . $cabang->code . '-MTG-' . date('ym') . $formatted_sequence_number;

    // Hitung nominal
    $data_nominal = [
      'allowance' => (float) ($request->allowance ?? 0),
      'transport_ankot' => (float) ($request->transport_ankot ?? 0),
      'hotel' => (float) ($request->hotel ?? 0),
    ];
    $totalNominal = array_sum($data_nominal);

    // Validasi budget
    $availableBudget = BudgetHelper::getAvailableBudget($cabang->id, $periodeMonth, $periodeYear);

    // Check if the total nominal exceeds the available budget
    if ($totalNominal > $availableBudget) {
      session()->flash('error', 'Alokasi budget bulanan cabang tidak mencukupi,silahkan ajukan pada periode expense berikutnya');
      return redirect()->back();
    }

    DB::beginTransaction();
    try {
      $attachmentsPayload = $this->buildAttachmentPayload($request, $folderPath);

      $form = FormMeetingSeminar::create([
        'expense_number' => $expense_number,
        'user_id' => auth()->user()->id,
        'tanggal' => $request->tanggal,
        'allowance' => $data_nominal['allowance'],
        'transport_ankot' => $data_nominal['transport_ankot'],
        'hotel' => $data_nominal['hotel'],
        'total' => $totalNominal,
        'bukti_allowance' => null,
        'bukti_transport_ankot' => null,
        'bukti_hotel' => null,
        'account_number' => $kategori?->account_number,
        'status' => 'On Progress',
      ]);

      if (!empty($attachmentsPayload)) {
        $this->attachmentService->addMultipleAttachments(
          $form->id,
          AttachmentTableName::FORM_MEETING_SEMINAR,
          $attachmentsPayload
        );
      }

      DB::commit();
    } catch (ValidationException $exception) {
      DB::rollBack();
      throw $exception;
    } catch (\Throwable $th) {
      DB::rollBack();

      Log::error('Failed to create Meeting Seminar form', [
        'user_id' => auth()->user()->id,
        'message' => $th->getMessage(),
        'trace' => $th->getTraceAsString(),
      ]);

      session()->flash('error', 'Terjadi kesalahan saat menyimpan data, silakan coba lagi.');
      return redirect()->back()->withInput();
    }

    $name = auth()->user()->name;
    $tanggal = $form->tanggal;
    $total = $form->total;

    // Send notification to MIS and Admin Region and Area Manager Cabang
    $roles = ['Marketing Information System', 'Admin Region', 'Area Manager Cabang'];
    $recipients = [$form->user->email, auth()->user()->email];
    $phoneNumbers = [$form->user->phone, auth()->user()->phone];
    $receiver_ids = [];

    // Collect all recipients (emails and phone numbers) for the specified roles
    $cabang = UserHasCabang::where('user_id', $form->user_id)->first();
    $cabang_id = $cabang ? $cabang->cabang_id : null;

    $cabangData = $cabang_id ? Cabang::where('id', $cabang_id)->first() : null;
    $region_id = $cabangData ? $cabangData->region->id : null;

    foreach ($roles as $role) {
      $users = Admin::getUserByRoleName($role)->filter(function ($user) use ($role, $cabang_id, $region_id) {
        if ($role === 'Marketing Information System') {
          return true; // Tidak ada filter cabang untuk peran ini
        }
        
        if (!$user->cabang || !$user->cabang->cabang) {
          return false; // Pastikan user memiliki cabang
        }

        if ($role === 'Admin Region' || $role === 'Marketing Operational Manager Region') {
          return $user->cabang->cabang->region->id === $region_id;
        }

        return $user->cabang->cabang->id === $cabang_id; 
      });

      foreach ($users as $user) {
        $recipients[] = $user->email;
        $phoneNumbers[] = $user->phone;
        $receiver_ids[] = $user->id;
      }
    }

    // Remove duplicate email addresses, if any
    $recipients = array_unique($recipients);
    $phoneNumbers = array_unique($phoneNumbers);
    $receiver_ids = array_unique($receiver_ids);

    // Generate URL and send WhatsApp notification
    $url = route('forms.meeting.view', $form->id);
    WhatsappHelper::newExpense($phoneNumbers, $expense_number, $url, $tanggal, $total, $name);

    // Send bulk email
    $brevoService = app(BrevoService::class);
    foreach ($recipients as $recipient) {
      try {
        $mail = new ExpenseCreated(
          $name,
          $expense_number,
          $tanggal,
          $total,
          $url
        );

        $response = $brevoService->expenseCreated($recipient, $name, $mail);

        if (isset($response['success']) && $response['success'] === false) {
          Log::warning("Email to {$recipient} failed: " . ($response['message'] ?? 'Unknown error'));
        }
      } catch (\Exception $e) {
        Log::error("Failed to send email to {$recipient}: " . $e->getMessage());
        continue;
      }
    }

    NotificationHelper::newExpense('meeting-seminar', $form->id, $form->user_id, $expense_number, $receiver_ids);

    AuditTrailHelper::AddAuditTrail('Insert', 'Insert New Expense at Form Meeting Seminar (' . $expense_number . ')');
    session()->flash('success', 'Form has been created.');
    return redirect()->back();
	}

	public function edit($id)
	{
    $this->checkAuthorization(auth()->user(), ['forms.meeting.edit']);
    $role = auth()->user()->getRoleNames()[0];

    $form = FormMeetingSeminar::with('attachments')->findOrFail($id);
    if($form->status != 'On Progress' && $role == 'Medical Representatif') {
      session()->flash('error', 'You cannot edit this form because it has been approved or rejected.');
      return redirect()->back();
    }

    $attachments = $this->formatAttachmentCollection($form);

		return view('backend.pages.forms.meeting.edit', [
      'form' => $form,
      'attachments' => $attachments,
		]);
	}

	public function update(Request $request, $id)
	{
    $this->checkAuthorization(auth()->user(), ['forms.meeting.edit']);
    $role = auth()->user()->getRoleNames()[0];
    $form = FormMeetingSeminar::with('attachments')->findOrFail($id);

    $validator = Validator::make($request->all(), [
      'tanggal' => 'required|date',
      'allowance' => 'nullable|numeric|min:0',
      'transport_ankot' => 'nullable|numeric|min:0',
      'hotel' => 'nullable|numeric|min:0',
      'attachments' => 'nullable|array',
      'attachments.*.file_category' => 'nullable|string|in:' . implode(',', array_keys($this->attachmentCategories)),
      'attachments.*.file_path' => 'nullable|file', // 10 MB
    ]);
    $this->addAttachmentValidationRules($validator, $request);
    $validator->validate();

    if ($form->status != 'On Progress' && $role == 'Medical Representatif') {
      session()->flash('error', 'You cannot edit this form because it has been approved or rejected.');
      return redirect()->back();
    }

    $cabang = UserHasCabang::with('cabang')->where('user_id', $form->user_id)->first()?->cabang;
    if (!$cabang) {
      session()->flash('error', 'Cabang tidak ditemukan.');
      return redirect()->back();
    }

    $region = Region::find($cabang->region_id);
    $kategori = Kategori::where('name', 'Meeting / Seminar')->first();

    $folderPath = '/expense/' . $region->code . '/' . $cabang->code . '/meeting';

    $attachmentsPayload = $this->buildAttachmentPayload($request, $folderPath);

    // Hitung nominal total
    $data_nominal = [
      'allowance' => (float) ($request->allowance ?? 0),
      'transport_ankot' => (float) ($request->transport_ankot ?? 0),
      'hotel' => (float) ($request->hotel ?? 0),
    ];

    $totalNominal = array_sum($data_nominal);

    // Hitung periode dari tanggal form yang diinput
    $tanggal = Carbon::parse($request->tanggal);
    $startDay = (int) env('STARTING_DATE', 11);
    if ($tanggal->day >= $startDay) {
      $periodeDate = Carbon::create($tanggal->year, $tanggal->month, $startDay);
    } else {
      $periodeDate = Carbon::create($tanggal->copy()->subMonth()->year, $tanggal->copy()->subMonth()->month, $startDay);
    }

    $periodeMonth = strtolower($periodeDate->format('F'));
    $periodeYear = (int) $periodeDate->format('Y');

    // Ambil budget tersedia
    $availableBudget = BudgetHelper::getAvailableBudget($cabang->id, $periodeMonth, $periodeYear);
    if ($totalNominal > $availableBudget) {
      session()->flash('error', 'The total nominal exceeds the available budget.');
      return redirect()->back();
    }

    DB::beginTransaction();
    try {
      $form->update([
        'tanggal' => $request->tanggal,
        'allowance' => $data_nominal['allowance'],
        'transport_ankot' => $data_nominal['transport_ankot'],
        'hotel' => $data_nominal['hotel'],
        'total' => $totalNominal,
        'account_number' => $kategori?->account_number,
      ]);

      if (!empty($attachmentsPayload)) {
        $this->attachmentService->addMultipleAttachments(
          $form->id,
          AttachmentTableName::FORM_MEETING_SEMINAR,
          $attachmentsPayload
        );
      }

      DB::commit();
    } catch (\Throwable $th) {
      DB::rollBack();

      Log::error('Failed to update Meeting Seminar form', [
        'form_id' => $form->id,
        'message' => $th->getMessage(),
        'trace' => $th->getTraceAsString(),
      ]);

      session()->flash('error', 'Terjadi kesalahan saat memperbarui data, silakan coba lagi.');
      return redirect()->back()->withInput();
    }

    AuditTrailHelper::AddAuditTrail('Update', 'Update Expense at Form Meeting Seminar (' . $form->expense_number . ')');
    session()->flash('success', 'Form has been updated.');
    return redirect()->back();
	}

  public function deleteAttachment(Request $request, $formId, $attachmentId)
  {
    $this->checkAuthorization(auth()->user(), ['forms.meeting.edit']);

    $form = FormMeetingSeminar::findOrFail($formId);
    $role = auth()->user()->getRoleNames()[0];

    if (($form->status !== 'On Progress' && $form->status !== 'Rejected') && $role === 'Medical Representatif') {
      return response()->json(['message' => 'You cannot modify attachments once the form is approved or closed.'], 403);
    }

    $attachment = AttachmentForm::where('id', $attachmentId)
      ->where('form_id', $form->id)
      ->where('table_name', AttachmentTableName::FORM_MEETING_SEMINAR)
      ->first();

    if (!$attachment) {
      return response()->json(['message' => 'Attachment not found.'], 404);
    }

    $this->attachmentService->deleteAttachment($attachment->id);

    AuditTrailHelper::AddAuditTrail('Delete Attachment', 'Delete Attachment at Form Meeting Seminar (' . $form->expense_number . ')');

    return response()->json(['message' => 'Attachment deleted successfully.']);
  }

  public function approve(Request $request, $id)
  {
    $this->checkAuthorization(auth()->user(), ['approval.approve']);

    $form = FormMeetingSeminar::findOrfail($id);

    $approved_data = [
      'allowance' => $request->allowance ? $form->allowance : 0,
      'transport_ankot' => $request->transport_ankot ? $form->transport_ankot : 0,
      'hotel' => $request->hotel ? $form->hotel : 0,
    ];

    $form->update([
      'approved_at' => now(),
      'approved_by' => auth()->user()->id,
      'status' => 'Approved 1',
      'approved_allowance' => $approved_data['allowance'],
      'approved_transport_ankot' => $approved_data['transport_ankot'],
      'approved_hotel' => $approved_data['hotel'],
      'approved_total' => array_sum($approved_data),
    ]);

    $name = $form->user->name;
    $expense_number = $form->expense_number;
    $tanggal = $form->tanggal;
    $total = $form->total;

    // Collect all recipients
    $roles = ['Marketing Information System', 'Admin Region', 'Area Manager Cabang', 'Marketing Operational Manager Region'];
    $recipients = [$form->user->email, auth()->user()->email];
    $phoneNumbers = [$form->user->phone, auth()->user()->phone];
    $receiver_ids = [];

    // Collect all recipients (emails and phone numbers) for the specified roles
    $cabang = UserHasCabang::where('user_id', $form->user_id)->first();
    $cabang_id = $cabang ? $cabang->cabang_id : null;

    $cabangData = $cabang_id ? Cabang::where('id', $cabang_id)->first() : null;
    $region_id = $cabangData ? $cabangData->region->id : null;

    foreach ($roles as $role) {
      $users = Admin::getUserByRoleName($role)->filter(function ($user) use ($role, $cabang_id, $region_id) {
        if ($role === 'Marketing Information System') {
          return true; // Tidak ada filter cabang untuk peran ini
        }
        
        if (!$user->cabang || !$user->cabang->cabang) {
          return false; // Pastikan user memiliki cabang
        }

        if ($role === 'Admin Region' || $role === 'Marketing Operational Manager Region') {
          return $user->cabang->cabang->region->id === $region_id;
        }

        return $user->cabang->cabang->id === $cabang_id; 
      });

      foreach ($users as $user) {
        $recipients[] = $user->email;
        $phoneNumbers[] = $user->phone;
        $receiver_ids[] = $user->id;
      }
    }

    // Remove duplicate data, if any
    $recipients = array_unique($recipients);
    $phoneNumbers = array_unique($phoneNumbers);
    $receiver_ids = array_unique($receiver_ids);

    // send whatsapp message
    $url = route('forms.meeting.view', $form->id);
    WhatsappHelper::approveExpense($phoneNumbers, $expense_number, $url, $tanggal, $total, $name);

    // Send bulk email
    $brevoService = app(BrevoService::class);
    foreach ($recipients as $recipient) {
      try {
        $mail = new ExpenseApproved(
          $name,
          $expense_number,
          $tanggal,
          $total,
          $url
        );

        $response = $brevoService->expenseApproved($recipient, $name, $mail);

        if (isset($response['success']) && $response['success'] === false) {
          Log::warning("Email to {$recipient} failed: " . ($response['message'] ?? 'Unknown error'));
        }
      } catch (\Exception $e) {
        Log::error("Failed to send email to {$recipient}: " . $e->getMessage());
        continue;
      }
    }

    NotificationHelper::approveExpense('meeting-seminar', $form->id, $form->user_id, $expense_number, $receiver_ids);

    AuditTrailHelper::AddAuditTrail('Approve', 'Approve Expense at Form Meeting Seminar (' . $form->expense_number . ')');
    session()->flash('success', 'Form has been approved.');
    return redirect()->back();
  }

  public function approve2($id)
  {
    $this->checkAuthorization(auth()->user(), ['approval2.approve']);

    $form = FormMeetingSeminar::findOrfail($id);
    $form->update([
      'approved2_at' => now(),
      'approved2_by' => auth()->user()->id,
      'status' => 'Approved 2',
    ]);

    $name = $form->user->name;
    $expense_number = $form->expense_number;
    $tanggal = $form->tanggal;
    $total = $form->total;

    $roles = ['Marketing Information System', 'Area Manager Cabang', 'Marketing Operational Manager Region', 'Head of Sales Marketing'];
    $recipients = [$form->user->email, auth()->user()->email];
    $phoneNumbers = [$form->user->phone, auth()->user()->phone];
    $receiver_ids = [];

    // Collect all recipients (emails and phone numbers) for the specified roles
    $cabang = UserHasCabang::where('user_id', $form->user_id)->first();
    $cabang_id = $cabang ? $cabang->cabang_id : null;

    $cabangData = $cabang_id ? Cabang::where('id', $cabang_id)->first() : null;
    $region_id = $cabangData ? $cabangData->region->id : null;

    foreach ($roles as $role) {
      $users = Admin::getUserByRoleName($role)->filter(function ($user) use ($role, $cabang_id, $region_id) {
        if ($role === 'Marketing Information System' || $role === 'Head of Sales Marketing') {
          return true; // Tidak ada filter cabang untuk peran ini
        }
        
        if (!$user->cabang || !$user->cabang->cabang) {
          return false; // Pastikan user memiliki cabang
        }

        if ($role === 'Admin Region' || $role === 'Marketing Operational Manager Region') {
          return $user->cabang->cabang->region->id === $region_id;
        }

        return $user->cabang->cabang->id === $cabang_id; 
      });

      foreach ($users as $user) {
        $recipients[] = $user->email;
        $phoneNumbers[] = $user->phone;
        $receiver_ids[] = $user->id;
      }
    }

    // Remove duplicate data, if any
    $recipients = array_unique($recipients);
    $phoneNumbers = array_unique($phoneNumbers);
    $receiver_ids = array_unique($receiver_ids);

    // send whatsapp message
    $url = route('forms.meeting.view', $form->id);
    WhatsappHelper::approve2Expense($phoneNumbers, $expense_number, $url, $tanggal, $total, $name);

    // Send bulk email
    $brevoService = app(BrevoService::class);
    foreach ($recipients as $recipient) {
      try {
        $mail = new ExpenseApproved2(
          $name,
          $expense_number,
          $tanggal,
          $total,
          $url
        );

        $response = $brevoService->expenseApproved2($recipient, $name, $mail);

        if (isset($response['success']) && $response['success'] === false) {
          Log::warning("Email to {$recipient} failed: " . ($response['message'] ?? 'Unknown error'));
        }
      } catch (\Exception $e) {
        Log::error("Failed to send email to {$recipient}: " . $e->getMessage());
        continue;
      }
    }

    NotificationHelper::approve2Expense('meeting-seminar', $form->id, $form->user_id, $expense_number, $receiver_ids);

    AuditTrailHelper::AddAuditTrail('Approve', 'Approve Expense at Form Meeting Seminar (' . $form->expense_number . ')');
    session()->flash('success', 'Form has been approved.');
    return redirect()->back();
  }

  public function finalApprove($id)
  {
    $this->checkAuthorization(auth()->user(), ['final_approval.approve']);
    $form = FormMeetingSeminar::findOrFail($id);

    if ($form->approved_at === null || $form->approved2_at === null) {
      session()->flash('error', 'Form must be approved by both approvers before final approval.');
      return redirect()->back();
    }

    $cabang_id = UserHasCabang::where('user_id', $form->user_id)->first()?->cabang_id;
    if (!$cabang_id) {
      session()->flash('error', 'Data cabang tidak ditemukan.');
      return redirect()->back();
    }

    // Hitung periode dari tanggal form
    $tanggal = Carbon::parse($form->tanggal);
    $startDay = (int) env('STARTING_DATE', 11);

    if ($tanggal->day >= $startDay) {
      $periodeDate = Carbon::create($tanggal->year, $tanggal->month, $startDay);
    } else {
      $periodeDate = Carbon::create($tanggal->copy()->subMonth()->year, $tanggal->copy()->subMonth()->month, $startDay);
    }

    $periodeMonth = strtolower($periodeDate->format('F'));
    $periodeYear = (int) $periodeDate->format('Y');

    $availableBudget = BudgetHelper::getAvailableBudget($cabang_id, $periodeMonth, $periodeYear);
    if($form->approved_total > $availableBudget) {
      session()->flash('error', 'Budget cabang untuk periode ini tidak mencukupi, silahkan ajukan pada periode expense berikutnya');
      return redirect()->back();
    }

    $form->update([
      'final_approved_at' => now(),
      'final_approved_by' => auth()->user()->id,
      'status' => 'Closed',
    ]);

    $name = $form->user->name;
    $expense_number = $form->expense_number;
    $tanggal = $form->tanggal;
    $total = $form->approved_total;

    $roles = ['Head of Sales Marketing', 'Marketing Operational Manager Region'];
    $recipients = [$form->user->email, auth()->user()->email];
    $phoneNumbers = [$form->user->phone, auth()->user()->phone];

    $cabang = UserHasCabang::where('user_id', $form->user_id)->first();
    $cabang_id = $cabang ? $cabang->cabang_id : null;

    $cabangData = $cabang_id ? Cabang::where('id', $cabang_id)->first() : null;
    $region_id = $cabangData ? $cabangData->region->id : null;

    foreach ($roles as $role) {
      $users = Admin::getUserByRoleName($role)->filter(function ($user) use ($role, $cabang_id, $region_id) {
        if ($role === 'Marketing Information System' || $role === 'Head of Sales Marketing') {
          return true; // Tidak ada filter cabang untuk peran ini
        }
        
        if (!$user->cabang || !$user->cabang->cabang) {
          return false; // Pastikan user memiliki cabang
        }

        if ($role === 'Admin Region' || $role === 'Marketing Operational Manager Region') {
          return $user->cabang->cabang->region->id === $region_id;
        }

        return $user->cabang->cabang->id === $cabang_id; 
      });

      foreach ($users as $user) {
        $recipients[] = $user->email;
        $phoneNumbers[] = $user->phone;
      }
    }

    // Remove duplicate email addresses, if any
    $recipients = array_unique($recipients);
    $phoneNumbers = array_unique($phoneNumbers);

    // send whatsapp message
    $url = route('forms.meeting.view', $form->id);
    WhatsappHelper::finalApprove($phoneNumbers, $expense_number, $url, $tanggal, $total, $name);

    // Send bulk email
    foreach ($recipients as $recipient) {
      try {
        Mail::to($recipient)->send(new FinalApprove(
          $name,
          $expense_number,
          $tanggal,
          $total,
          $url
        ));
      } catch (\Exception $e) {
        Log::error("Failed to send email to {$recipient}: " . $e->getMessage());
        continue;
      }
    }

    AuditTrailHelper::AddAuditTrail('Final Approve', 'Final Approve Expense at Form Meeting Seminar (' . $form->expense_number . ')');
    session()->flash('success', 'Form has been final approved.');
    return redirect()->back();
  }

  public function reject(Request $request, $id)
  {
    $this->checkAuthorization(auth()->user(), ['approval.reject']);

    $request->validate([
      'remarks' => 'required|string|max:500',
    ]);

    $form = FormMeetingSeminar::findOrfail($id);
    $form->update([
      'status' => 'Rejected',
      'remarks' => $request->remarks,
    ]);

    $heads = $form->user->getCabangAndRegionHead();
    $name = $form->user->name;
    $expense_number = $form->expense_number;
    $tanggal = $form->tanggal;
    $total = $form->total;

    // Collect all recipients
    $recipients = [$form->user->email, auth()->user()->email];
    $phoneNumbers = [$form->user->phone, auth()->user()->phone];

    if ($heads['cabang_head']) {
      $recipients[] = $heads['cabang_head']['email'];
      $phoneNumbers[] = $heads['cabang_head']['phone'];
    }

    if ($heads['region_head']) {
      $recipients[] = $heads['region_head']['email'];
      $phoneNumbers[] = $heads['region_head']['phone'];
    }

    // Remove duplicate email addresses, if any
    $recipients = array_unique($recipients);
    $phoneNumbers = array_unique($phoneNumbers);

    // send whatsapp message
    $url = route('forms.meeting.view', $form->id);
    WhatsappHelper::rejectExpense($phoneNumbers, $expense_number, $url, $tanggal, $total, $name, $request->remarks);

    // Send bulk email
    $brevoService = app(BrevoService::class);
    foreach ($recipients as $recipient) {
      try {
        $mail = new ExpenseRejected(
          $name,
          $expense_number,
          $tanggal,
          $total,
          $url,
          $request->remarks
        );

        $response = $brevoService->expenseRejected($recipient, $name, $mail);

        if (isset($response['success']) && $response['success'] === false) {
          Log::warning("Email to {$recipient} failed: " . ($response['message'] ?? 'Unknown error'));
        }
      } catch (\Exception $e) {
        Log::error("Failed to send email to {$recipient}: " . $e->getMessage());
        continue;
      }
    }

    AuditTrailHelper::AddAuditTrail('Reject', 'Reject Expense at Form Meeting Seminar (' . $form->expense_number . ')');
    session()->flash('success', 'Form has been rejected.');
    return redirect()->back();
  }

  public function open($id)
  {
    $this->checkAuthorization(auth()->user(), ['final_approval.open']);

    $form = FormMeetingSeminar::findOrfail($id);
    $form->update([
      'final_approved_at' => null,
      'final_approved_by' => null,
      'status' => 'Approved'
    ]);

    AuditTrailHelper::AddAuditTrail('Open', 'Open Expense at Form Meeting Seminar (' . $form->expense_number . ')');
    session()->flash('success', 'Form has been opened.');
    return redirect()->back();
  }

	public function destroy($id)
	{
    $this->checkAuthorization(auth()->user(), ['forms.meeting.delete']);
    $role = auth()->user()->getRoleNames()[0];
    
		$form = FormMeetingSeminar::findOrfail($id);
    if($form->status != 'On Progress' && $role == 'Medical Representatif') {
      session()->flash('error', 'You cannot edit this form because it has been approved or rejected.');
      return redirect()->back();
    }

    AuditTrailHelper::AddAuditTrail('Delete', 'Delete Record at Form Meeting Seminar (' . $form->expense_number . ')');
    
		$form->delete();

		session()->flash('success', 'Form has been deleted.');
		return redirect()->back();
	}

  protected function addAttachmentValidationRules(\Illuminate\Validation\Validator $validator, Request $request): void
  {
    $validator->after(function ($validator) use ($request) {
      $inputAttachments = $request->input('attachments', []);
      $fileAttachments = $request->file('attachments', []);

      foreach ($inputAttachments as $index => $input) {
        $category = $input['file_category'] ?? null;
        $file = $fileAttachments[$index]['file_path'] ?? null;

        if ($file && !$category) {
          $validator->errors()->add("attachments.{$index}.file_category", 'Attachment category is required.');
        }

        if ($category && !$file) {
          $validator->errors()->add("attachments.{$index}.file_path", 'Attachment file is required.');
          continue;
        }

        if (!$file) {
          continue;
        }

        $extension = strtolower((string) $file->getClientOriginalExtension());
        if ($this->isBlockedExtension($extension)) {
          $validator->errors()->add("attachments.{$index}.file_path", 'File type is not allowed.');
          continue;
        }

        $mimeType = (string) $file->getMimeType();
        if (in_array($extension, $this->imageExtensions, true) && strpos($mimeType, 'image/') !== 0) {
          $validator->errors()->add("attachments.{$index}.file_path", 'Invalid image file.');
        }

        if ($extension === 'pdf' && $mimeType !== 'application/pdf') {
          $validator->errors()->add("attachments.{$index}.file_path", 'Invalid PDF file.');
        }
      }

      foreach ($fileAttachments as $index => $files) {
        $file = $files['file_path'] ?? null;
        if ($file && !isset($inputAttachments[$index])) {
          $validator->errors()->add("attachments.{$index}.file_category", 'Attachment category is required.');
        }
      }
    });
  }

  protected function buildAttachmentPayload(Request $request, string $folderPath): array
  {
    $payload = [];
    $inputs = $request->input('attachments', []);
    $files = $request->file('attachments', []);

    foreach ($inputs as $index => $input) {
      $category = $input['file_category'] ?? null;
      $file = $files[$index]['file_path'] ?? null;

      if (!$category || !$file) {
        continue;
      }

      $extension = strtolower((string) $file->getClientOriginalExtension());

      if ($this->isBlockedExtension($extension)) {
        throw ValidationException::withMessages([
          "attachments.{$index}.file_path" => 'File type is not allowed.',
        ]);
      }

      $filename = Str::uuid() . '.' . $extension;
      $filePath = rtrim($folderPath, '/') . '/' . $filename;

      $uploadResponse = NextCloudHelper::uploadFile(
        $folderPath,
        $file->getContent(),
        $filename
      );

      if (is_array($uploadResponse) && isset($uploadResponse['success']) && $uploadResponse['success'] === false) {
        throw ValidationException::withMessages([
          "attachments.{$index}.file_path" => $uploadResponse['message'] ?? 'Failed to upload attachment.',
        ]);
      }

      $payload[] = [
        'file_category' => $category,
        'file_path' => $filePath,
      ];
    }

    return $payload;
  }

  protected function formatAttachmentCollection(FormMeetingSeminar $form): array
  {
    if (!$form->relationLoaded('attachments')) {
      $form->load('attachments');
    }

    $attachments = $form->attachments->map(function (AttachmentForm $attachment) {
      if (!$attachment->file_path) {
        return null;
      }

      return $this->formatAttachmentData(
        $attachment->id,
        $attachment->file_category,
        $attachment->file_path
      );
    })->filter()->values()->all();

    $legacySources = [
      'bukti_allowance' => $form->bukti_allowance,
      'bukti_transport_ankot' => $form->bukti_transport_ankot,
      'bukti_hotel' => $form->bukti_hotel,
    ];

    foreach ($legacySources as $category => $path) {
      if ($path) {
        $attachments[] = $this->formatAttachmentData(null, $category, $path, false);
      }
    }

    return $attachments;
  }

  protected function formatAttachmentData(?int $id, ?string $category, string $filePath, bool $canDelete = true): array
  {
    $extension = strtolower(pathinfo($filePath, PATHINFO_EXTENSION));
    $previewType = $this->determinePreviewType($extension);

    return [
      'id' => $id,
      'file_category' => $category,
      'category_label' => $this->getCategoryLabel($category),
      'file_path' => $filePath,
      'download_url' => NextCloudHelper::getFileUrl($filePath),
      'preview_url' => in_array($previewType, ['image', 'pdf'], true) ? NextCloudHelper::getPreviewUrl($filePath) : null,
      'preview_type' => $previewType,
      'filename' => basename($filePath),
      'extension' => $extension,
      'can_delete' => $canDelete && !is_null($id),
    ];
  }

  protected function determinePreviewType(?string $extension): string
  {
    $extension = strtolower((string) $extension);

    if (in_array($extension, $this->imageExtensions, true)) {
      return 'image';
    }

    if ($extension === 'pdf') {
      return 'pdf';
    }

    return 'other';
  }

  protected function isBlockedExtension(?string $extension): bool
  {
    return in_array(strtolower((string) $extension), $this->blockedExtensions, true);
  }

  protected function getAttachmentDownloadUrlByCategory(array $attachments, string $category): ?string
  {
    foreach ($attachments as $attachment) {
      if (($attachment['file_category'] ?? null) === $category) {
        return $attachment['download_url'] ?? null;
      }
    }

    return null;
  }

  protected function getCategoryLabel(?string $category): string
  {
    if (!$category) {
      return 'Lampiran';
    }

    if (isset($this->attachmentCategories[$category])) {
      return $this->attachmentCategories[$category];
    }

    return ucwords(str_replace('_', ' ', $category));
  }
}