<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Validator;
use Laravel\Sanctum\PersonalAccessToken;

class AuthController extends Controller
{
    // Регистрация
    public function register(Request $request)
    {
        return false;
        $validator = Validator::make($request->all(), [
            'name' => 'required|string|max:255',
            'login' => 'required|string|max:255|unique:users',
            'password' => 'required|string|min:8|confirmed',
            'department' => 'required|string',
            'position' => 'required|string',
            'phone' => 'nullable|string',
            'role' => 'required|in:doctor,nurse,head_of_department,statistician,admin'
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'errors' => $validator->errors()
            ], 422);
        }

        // Проверка прав на создание пользователя
        if (Auth::check() && !Auth::user()->isAdmin()) {
            return response()->json([
                'success' => false,
                'message' => 'Недостаточно прав для создания пользователя'
            ], 403);
        }

        $user = User::create([
            'name' => $request->name,
            'login' => $request->login,
            'password' => Hash::make($request->password),
            'department' => $request->department,
            'position' => $request->position,
            'phone' => $request->phone,
            'role' => $request->role,
            'is_active' => true
        ]);

        $token = $user->createToken('auth_token')->plainTextToken;

        return response()->json([
            'success' => true,
            'message' => 'Пользователь успешно зарегистрирован',
            'user' => $user->only(['id', 'name', 'login', 'department', 'position', 'role']),
            'token' => $token,
            'permissions' => $user->permissions()
        ], 201);
    }

    // Вход
    public function login(Request $request)
    {
        // Проверяем, что пользователь уже авторизован через сессию
        if (!Auth::check()) {
            return response()->json([
                'error' => 'Not authenticated'
            ], 401);
        }

        $user = Auth::user();

        // Удаляем старые токены
        $user->tokens()->delete();

        // Создаем новый токен
        $token = $user->createToken('auth_token')->plainTextToken;

        return response()->json([
            'success' => true,
            'message' => 'Успешный вход',
            'user' => $user->only(['id', 'name', 'login']),
            'token' => $token,
            'permissions' => $user->permissions(),
            'available_departments' => $user->availableDepartments()
        ]);
    }

    // Выход
    public function logout(Request $request)
    {
        // Удаляем токен
        $request->user()->currentAccessToken()->delete();

        // Выходим из сессии
        Auth::logout();

        return response()->json([
            'success' => true,
            'message' => 'Успешный выход'
        ]);
    }

    // Получение текущего пользователя
    public function user(Request $request)
    {
        $user = $request->user();

        if (!$user) {
            return response()->json([
                'success' => false,
                'message' => 'Пользователь не авторизован'
            ], 401);
        }

        return response()->json([
            'success' => true,
            'user' => $user->only(['id', 'name', 'login', 'department', 'position', 'role', 'phone']),
            'permissions' => $user->permissions(),
            'available_departments' => $user->availableDepartments()
        ]);
    }

    // Обновление профиля
    public function updateProfile(Request $request)
    {
        $user = $request->user();

        $validator = Validator::make($request->all(), [
            'name' => 'sometimes|string|max:255',
            'login' => 'sometimes|unique:users,login,' . $user->id,
            'current_password' => 'required_with:password',
            'password' => 'sometimes|min:8|confirmed',
            'department' => 'sometimes|string',
            'phone' => 'sometimes|string'
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'errors' => $validator->errors()
            ], 422);
        }

        // Проверка текущего пароля при смене пароля
        if ($request->has('password')) {
            if (!Hash::check($request->current_password, $user->password)) {
                return response()->json([
                    'success' => false,
                    'message' => 'Текущий пароль неверен'
                ], 422);
            }
            $user->password = Hash::make($request->password);
        }

        if ($request->has('name')) {
            $user->name = $request->name;
        }

        if ($request->has('login')) {
            $user->login = $request->login;
        }

        if ($request->has('department')) {
            $user->department = $request->department;
        }

        if ($request->has('phone')) {
            $user->phone = $request->phone;
        }

        $user->save();

        return response()->json([
            'success' => true,
            'message' => 'Профиль обновлен',
            'user' => $user->only(['id', 'name', 'login', 'department', 'position', 'role', 'phone'])
        ]);
    }

    // Проверка токена
    public function checkToken(Request $request)
    {
        $token = $request->bearerToken();

        if (!$token) {
            return response()->json(['valid' => false], 401);
        }

        $accessToken = PersonalAccessToken::findToken($token);

        if (!$accessToken || !$accessToken->tokenable) {
            return response()->json(['valid' => false], 401);
        }

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

    // Получение списка пользователей (только для админов)
    public function getUsers(Request $request)
    {
        $user = $request->user();

        if (!$user->isAdmin()) {
            return response()->json([
                'success' => false,
                'message' => 'Недостаточно прав'
            ], 403);
        }

        $users = User::select('id', 'name', 'login', 'department', 'position', 'role', 'phone', 'is_active', 'created_at')
            ->orderBy('created_at', 'desc')
            ->get();

        return response()->json([
            'success' => true,
            'users' => $users
        ]);
    }

    // Управление пользователями
    public function updateUser(Request $request, $id)
    {
        $currentUser = $request->user();

        if (!$currentUser->isAdmin()) {
            return response()->json([
                'success' => false,
                'message' => 'Недостаточно прав'
            ], 403);
        }

        $user = User::findOrFail($id);

        $validator = Validator::make($request->all(), [
            'is_active' => 'boolean',
            'role' => 'in:doctor,nurse,head_of_department,statistician,admin',
            'department' => 'string'
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'errors' => $validator->errors()
            ], 422);
        }

        if ($request->has('is_active')) {
            $user->is_active = $request->is_active;
        }

        if ($request->has('role')) {
            $user->role = $request->role;
        }

        if ($request->has('department')) {
            $user->department = $request->department;
        }

        $user->save();

        return response()->json([
            'success' => true,
            'message' => 'Пользователь обновлен',
            'user' => $user->only(['id', 'name', 'login', 'department', 'position', 'role', 'is_active'])
        ]);
    }
}