<?php

namespace BookStack\Http;

use BookStack\Activity\Models\Loggable;
use BookStack\App\Model;
use BookStack\Exceptions\NotifyException;
use BookStack\Facades\Activity;
use BookStack\Permissions\Permission;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller as BaseController;

abstract class Controller extends BaseController
{
    use DispatchesJobs;
    use ValidatesRequests;

    /**
     * Check if the current user is signed in.
     */
    protected function isSignedIn(): bool
    {
        return auth()->check();
    }

    /**
     * Stops the application and shows a permission error if the application is in demo mode.
     */
    protected function preventAccessInDemoMode(): void
    {
        if (config('app.env') === 'demo') {
            $this->showPermissionError();
        }
    }

    /**
     * Adds the page title into the view.
     */
    public function setPageTitle(string $title): void
    {
        view()->share('pageTitle', $title);
    }

    /**
     * On a permission error redirect to home and display the error as a notification.
     *
     * @throws NotifyException
     */
    protected function showPermissionError(string $redirectLocation = '/'): never
    {
        $message = request()->wantsJson() ? trans('errors.permissionJson') : trans('errors.permission');

        throw new NotifyException($message, $redirectLocation, 403);
    }

    /**
     * Checks that the current user has the given permission otherwise throw an exception.
     */
    protected function checkPermission(string|Permission $permission): void
    {
        if (!user() || !user()->can($permission)) {
            $this->showPermissionError();
        }
    }

    /**
     * Prevent access for guest users beyond this point.
     */
    protected function preventGuestAccess(): void
    {
        if (user()->isGuest()) {
            $this->showPermissionError();
        }
    }

    /**
     * Check the current user's permissions against an ownable item otherwise throw an exception.
     */
    protected function checkOwnablePermission(string|Permission $permission, Model $ownable, string $redirectLocation = '/'): void
    {
        if (!userCan($permission, $ownable)) {
            $this->showPermissionError($redirectLocation);
        }
    }

    /**
     * Check if a user has a permission or bypass the permission
     * check if the given callback resolves true.
     */
    protected function checkPermissionOr(string|Permission $permission, callable $callback): void
    {
        if ($callback() !== true) {
            $this->checkPermission($permission);
        }
    }

    /**
     * Check if the current user has a permission or bypass if the provided user
     * id matches the current user.
     */
    protected function checkPermissionOrCurrentUser(string|Permission $permission, int $userId): void
    {
        $this->checkPermissionOr($permission, function () use ($userId) {
            return $userId === user()->id;
        });
    }

    /**
     * Send back a JSON error message.
     */
    protected function jsonError(string $messageText = '', int $statusCode = 500): JsonResponse
    {
        return response()->json(['message' => $messageText, 'status' => 'error'], $statusCode);
    }

    /**
     * Create and return a new download response factory using the current request.
     */
    protected function download(): DownloadResponseFactory
    {
        return new DownloadResponseFactory(request());
    }

    /**
     * Show a positive, successful notification to the user on the next view load.
     */
    protected function showSuccessNotification(string $message): void
    {
        session()->flash('success', $message);
    }

    /**
     * Show a warning notification to the user on the next view load.
     */
    protected function showWarningNotification(string $message): void
    {
        session()->flash('warning', $message);
    }

    /**
     * Show an error notification to the user on the next view load.
     */
    protected function showErrorNotification(string $message): void
    {
        session()->flash('error', $message);
    }

    /**
     * Log an activity in the system.
     */
    protected function logActivity(string $type, string|Loggable $detail = ''): void
    {
        Activity::add($type, $detail);
    }

    /**
     * Get the validation rules for image files.
     */
    protected function getImageValidationRules(): array
    {
        return ['image_extension', 'mimes:jpeg,png,gif,webp,avif', 'max:' . (config('app.upload_limit') * 1000)];
    }

    /**
     * Redirect to the URL provided in the request as a '_return' parameter.
     * Will check that the parameter leads to a URL under the same origin as the application.
     */
    protected function redirectToRequest(Request $request): RedirectResponse
    {
        $basePath = url('/');
        $returnUrl = $request->input('_return') ?? $basePath;

        // Only allow use of _return on requests where we expect CSRF to be active
        // to prevent it potentially being used as an open redirect
        $allowedMethods = ['POST', 'PUT', 'PATCH', 'DELETE'];
        if (!in_array($request->getMethod(), $allowedMethods)) {
            return redirect($basePath);
        }

        $intendedUrl = parse_url($returnUrl);
        $baseUrl = parse_url($basePath);
        $isSameOrigin = ($intendedUrl['host'] ?? '') === ($baseUrl['host'] ?? '')
            && ($intendedUrl['scheme'] ?? '') === ($baseUrl['scheme'] ?? '')
            && ($intendedUrl['port'] ?? 0) === ($baseUrl['port'] ?? 0);
        if (!$isSameOrigin) {
            return redirect($basePath);
        }

        return redirect($returnUrl);
    }
}
