<?php

namespace App\Http\Controllers;

use App\Models\User;
use App\Models\Role;
use App\Traits\LogsActivity; 
use Illuminate\Http\Request;
use Illuminate\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Gate; // WAJIB DIIMPORT
use Illuminate\Validation\Rules;
use App\Models\ActivityLog; 
use Maatwebsite\Excel\Facades\Excel; 
use App\Exports\ActivityLogExport;

class UserController extends Controller
{
    use LogsActivity; 

    /**
     * Menampilkan daftar user.
     * Izin: users (read)
     */
    public function index(Request $request): View
    {
        // GANTI: Otorisasi berdasarkan Matriks Permission
        Gate::authorize('check-access', ['users', 'read']);

        $users = User::query()
            ->with('roleModel')
            ->when($request->search, function ($query, $search) {
                $query->where(function ($q) use ($search) {
                    $q->where('name', 'like', "%{$search}%")
                      ->orWhere('email', 'like', "%{$search}%");
                });
            })
            ->latest()
            ->paginate(10);

        return view('pages.users.index', compact('users'));
    }

    /**
     * Form tambah user baru.
     * Izin: users (create)
     */
    public function create(): View
    {
        Gate::authorize('check-access', ['users', 'create']);

        $roles = Role::all();
        return view('pages.users.create', compact('roles'));
    }

    /**
     * Simpan user baru.
     * Izin: users (create)
     */
    public function store(Request $request): RedirectResponse
    {
        Gate::authorize('check-access', ['users', 'create']);

        $validated = $request->validate([
            'name'     => 'required|string|max:255',
            'email'    => 'required|string|lowercase|email|max:255|unique:users',
            'phone'    => 'nullable|string|max:15',
            'role_id'  => 'required|exists:roles,id',
            'password' => ['required', 'confirmed', Rules\Password::defaults()],
        ]);

        $role = Role::find($validated['role_id']);

        $user = User::create([
            'name'     => $validated['name'],
            'email'    => $validated['email'],
            'phone'    => $validated['phone'],
            'role_id'  => $validated['role_id'],
            'role'     => $role->slug, 
            'password' => Hash::make($validated['password']),
        ]);

        // Catat aktivitas (Gunakan parameter model untuk log)
        $this->logAction('CREATED', $user, "Mendaftarkan user baru: {$user->name} sebagai {$role->name}", 'User');

        return redirect()->route('admin.users.index')->with('success', "User {$user->name} berhasil ditambahkan.");
    }

    /**
     * Halaman Edit User.
     * Izin: users (update)
     */
    public function edit(User $user): View
    {
        Gate::authorize('check-access', ['users', 'update']);

        $roles = Role::all();
        return view('pages.users.edit', compact('user', 'roles'));
    }

    /**
     * Update Data User.
     * Izin: users (update)
     */
    public function update(Request $request, User $user): RedirectResponse
    {
        Gate::authorize('check-access', ['users', 'update']);

        $validated = $request->validate([
            'name'    => 'required|string|max:255',
            'email'   => 'required|email|unique:users,email,' . $user->id,
            'role_id' => 'required|exists:roles,id',
            'phone'   => 'nullable|string|max:15',
        ]);

        $newRole = Role::find($validated['role_id']);

        // Keamanan Logika: Tetap pertahankan agar user tidak merusak akun sendiri
        if ($user->id === auth()->id() && $newRole->slug !== 'admin' && auth()->user()->role === 'admin') {
            return back()->with('error', 'Akses Ditolak! Anda tidak bisa menurunkan otoritas Admin Anda sendiri.');
        }

        $user->update(array_merge($validated, [
            'role' => $newRole->slug
        ]));

        $this->logAction('UPDATED', $user, "Memperbarui data profil user: {$user->name}", 'User');

        return redirect()->route('admin.users.index')->with('success', "Data {$user->name} berhasil diperbarui.");
    }

    /**
     * Hapus User.
     * Izin: users (delete)
     */
    public function destroy(User $user): RedirectResponse
    {
        Gate::authorize('check-access', ['users', 'delete']);

        if ($user->id === auth()->id()) {
            return back()->with('error', 'Akses Ditolak! Anda tidak dapat menghapus akun Anda sendiri.');
        }

        $userName = $user->name;
        $this->logAction('DELETED', $user, "Menghapus user: {$userName}", 'User');
        $user->delete();

        return redirect()->route('admin.users.index')->with('success', "User {$userName} telah dihapus.");
    }

    /* -------------------------------------------------------------------------- */
    /* AUDIT TRAIL / LOGS SECTION                                                 */
    /* -------------------------------------------------------------------------- */

    /**
     * Daftar Aktivitas.
     * Izin: logs (read)
     */
    public function activityLogs(Request $request)
    {
        Gate::authorize('check-access', ['logs', 'read']);

        $logs = ActivityLog::with('user')
            ->when($request->search, function ($query, $search) {
                $query->where(function ($q) use ($search) {
                    $q->where('description', 'like', "%{$search}%")
                      ->orWhereHas('user', function ($qu) use ($search) {
                          $qu->where('name', 'like', "%{$search}%");
                      });
                });
            })
            ->when($request->action, function ($query, $action) {
                $query->where('action', 'like', "%{$action}%");
            })
            ->latest()
            ->paginate(20);

        return view('pages.admin.logs', compact('logs'));
    }

    /**
     * Export Logs ke Excel.
     * Izin: logs (read)
     */
    public function exportLogs()
    {   
        Gate::authorize('check-access', ['logs', 'read']);
        return Excel::download(new ActivityLogExport, 'audit_trail_'.now()->format('Ymd').'.xlsx');
    }

    /**
     * Bersihkan Logs.
     * Izin: logs (delete)
     */
    public function clearLogs()
    {
        Gate::authorize('check-access', ['logs', 'delete']);
        return back()->with('error', 'Penghapusan massal audit trail dinonaktifkan untuk menjaga jejak perubahan data. Gunakan kebijakan retensi/arsip bila diperlukan.');
    }
}