<?php declare(strict_types=1);

namespace App\Services\Private;

use App\Dto\Builder\User as UserBuilderDto;
use App\Dto\Request\Private\User\StoreUpdate;
use App\Dto\Request\Private\User\UpdatePassword;
use App\Helpers\Helpers;
use App\Models\User;
use App\Dto\QuerySettingsDto;
use App\Repositories\RoleRepository;
use App\Repositories\UserRepository;
use App\ServiceResults\ServiceResultArray;
use App\ServiceResults\ServiceResultError;
use App\ServiceResults\ServiceResultSuccess;
use App\ServiceResults\StoreUpdateResult;
use App\Services\Service;
use App\Services\User\UserCommandHandler;
use Illuminate\Support\Facades\DB;

final class UserService extends Service
{
    public function __construct(
        private readonly UserRepository $userRepository,
        private readonly UserCommandHandler $userCommandHandler,
        private readonly RoleRepository $roleRepository
    ) { }

    public function index(UserBuilderDto $userBuilderDto, QuerySettingsDto $querySettingsDto, User $user): ServiceResultError | ServiceResultArray
    {
        if ($user->cannot('viewAny', User::class)) {
            return $this->errFobidden(__('Access is denied'));
        }

        $users = $this->userRepository->getUsers(
            $userBuilderDto,
            $querySettingsDto->getQueryWith()
        )->pagination(
            $querySettingsDto->getLimit(),
            $querySettingsDto->getPage()
        );

        return $this->result([
            'users' => $users,
        ]);
    }

    public function create(User $user): ServiceResultError | ServiceResultArray
    {
        if ($user->cannot('create', User::class)) {
            return $this->errFobidden(__('Access is denied'));
        }

        return $this->result([
            'user' => new User(),
            'roles' => $this->roleRepository->getRolesForSelect(),
            'userRoles' => [],
        ]);
    }

    public function edit(int $id, User $user): ServiceResultError | ServiceResultArray
    {
        $modelUser = $this->userRepository->getUserById($id);

        if (is_null($modelUser)) {
            return $this->errNotFound(__('Not Found'));
        }

        if ($user->cannot('view', $modelUser)) {
            return $this->errFobidden(__('Access is denied'));
        }

        $userRoles = $modelUser->roles()->withTrashed()->pluck('id')->toArray();
        return $this->result([
            'user' => $modelUser,
            'roles' => $this->roleRepository->getRolesForSelect($userRoles),
            'userRoles' => $userRoles,
        ]);
    }

    public function store(StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
    {
        if ($user->cannot('create', User::class)) {
            return $this->errFobidden(__('Access is denied'));
        }

        if ($this->userRepository->isExistsEmail($data->getEmail())) {
            return $this->errValidate(
                __('validation.unique', ['attribute' => __('validation.attributes.email')]),
                ['code' => __('validation.unique', ['attribute' => __('validation.attributes.email')])]
            );
        }

        try {
            $modelUser = DB::transaction(function () use ($data) {
                $dataUser = $this->getDataUser($data);

                $modelUser = $this->userCommandHandler->handleStore($dataUser, $data->getPassword());
                $this->userCommandHandler->handleConfirmationByEmail($modelUser);
                $this->userCommandHandler->handleSyncRoles($modelUser, $data->getRoles());

                return $modelUser;
            });
        } catch (\Throwable $e) {
            report($e);
            return $this->errService(__('Server Error'));
        }

        return $this->resultStoreUpdateModel($modelUser, __('The user was successfully created'));
    }

    public function update(int $id, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
    {
        $modelUser = $this->userRepository->getUserById($id);

        if (is_null($modelUser)) {
            return $this->errNotFound(__('Not Found'));
        }

        if ($user->cannot('update', $modelUser)) {
            return $this->errFobidden(__('Access is denied'));
        }

        if (Helpers::isDemoModeAndUserDenyUpdate($modelUser)) {
            return $this->errValidate(__('Demo Mode'));
        }

        if ($this->userRepository->isExistsEmail($data->getEmail(), $modelUser->id)) {
            return $this->errValidate(
                __('validation.unique', ['attribute' => __('validation.attributes.email')]),
                ['code' => __('validation.unique', ['attribute' => __('validation.attributes.email')])]
            );
        }

        try {
            $modelUser = DB::transaction(function () use ($data, $modelUser) {
                $dataUser = $this->getDataUser($data);

                $modelUser = $this->userCommandHandler->handleUpdate($modelUser, $dataUser);
                $this->userCommandHandler->handleSyncRoles($modelUser, $data->getRoles());

                return $modelUser;
            });
        } catch (\Throwable $e) {
            report($e);
            return $this->errService(__('Server Error'));
        }

        return $this->resultStoreUpdateModel($modelUser, __('The user was successfully updated'));
    }

    public function updatePassword(int $id, UpdatePassword $data, User $user): ServiceResultError | StoreUpdateResult
    {
        $modelUser = $this->userRepository->getUserById($id);

        if (is_null($modelUser)) {
            return $this->errNotFound(__('Not Found'));
        }

        if ($user->cannot('update', $modelUser)) {
            return $this->errFobidden(__('Access is denied'));
        }

        if (Helpers::isDemoModeAndUserDenyUpdate($modelUser)) {
            return $this->errValidate(__('Demo Mode'));
        }

        try {
            $this->userCommandHandler->handleUpdatePassword($modelUser, $data->getPassword());
        } catch (\Throwable $e) {
            report($e->getMessage());
            return $this->errService($e->getMessage());
        }

        return $this->resultStoreUpdateModel($modelUser, __('The password has been changed'));
    }

    public function destroy(int $id, User $user): ServiceResultError | ServiceResultSuccess
    {
        $modelUser = $this->userRepository->getUserById($id);

        if (is_null($modelUser)) {
            return $this->errNotFound(__('Not Found'));
        }

        if ($user->cannot('delete', $modelUser)) {
            return $this->errFobidden(__('Access is denied'));
        }

        if (Helpers::isDemoModeAndUserDenyUpdate($modelUser)) {
            return $this->errValidate(__('Demo Mode'));
        }

        try {
            DB::transaction(function () use ($modelUser) {
                $this->userCommandHandler->handleDestroy($modelUser);
            });
        } catch (\Throwable $e) {
            report($e);
            return $this->errService(__('Server Error'));
        }

        return $this->ok(__('The user has been deleted'));
    }

    private function getDataUser(StoreUpdate $data): array
    {
        return [
            'is_active' => $data->isActive(),
            'name' => $data->getName(),
            'email' => $data->getEmail(),
        ];
    }
}