<?php

namespace App\Exceptions;

use Illuminate\Auth\Access\AuthorizationException;
use Illuminate\Auth\AuthenticationException;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Illuminate\Session\TokenMismatchException;
use Illuminate\Support\Facades\Mail;
use Illuminate\Validation\ValidationException;
use Symfony\Component\ErrorHandler\ErrorRenderer\HtmlErrorRenderer;
use Symfony\Component\ErrorHandler\Exception\FlattenException;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
use Throwable;

class Handler extends ExceptionHandler
{
    /**
     * A list of the exception types that are not reported.
     *
     * @var array
     */
    protected $dontReport = [
        //
    ];

    /**
     * A list of the inputs that are never flashed for validation exceptions.
     *
     * @var array
     */
    protected $dontFlash = [
        'password',
        'password_confirmation',
    ];

    /**
     * Report or log an exception.
     *
     * @param  \Throwable  $exception
     * @return void
     *
     * @throws \Exception
     */
    public function report(Throwable $exception)
    {
        parent::report($exception);

        $e = $this->mapException($exception);

        if ($this->shouldMailServerError($e)) {
            $this->sendEmail($e);
        }
    }

    /**
     * E-Mail nur bei echten Serverfeilern (5xx bzw. unbehandelte Exceptions), nicht bei lokalem Entwickeln.
     */
    protected function shouldMailServerError(Throwable $e): bool
    {
        if (app()->environment('local', 'testing')) {
            return false;
        }

        if (! config('app.exception_mail')) {
            return false;
        }

        return $this->exceptionIndicatesServerError($e);
    }

    /**
     * Entspricht dem, was üblicherweise als HTTP500 ausgeliefert würde.
     */
    protected function exceptionIndicatesServerError(Throwable $e): bool
    {
        if (
            $e instanceof AuthenticationException
            || $e instanceof AuthorizationException
            || $e instanceof ModelNotFoundException
            || $e instanceof ValidationException
            || $e instanceof TokenMismatchException
        ) {
            return false;
        }

        if ($e instanceof HttpExceptionInterface) {
            return $e->getStatusCode() >= 500;
        }

        return true;
    }

    protected function exceptionMailContextLine(): string
    {
        if (app()->runningInConsole()) {
            $argv = $_SERVER['argv'] ?? [];

            return 'CLI: ' . (count($argv) ? implode(' ', $argv) : php_sapi_name());
        }

        if (app()->bound('request') && request()) {
            return request()->fullUrl();
        }

        return 'n/a';
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Throwable  $exception
     * @return \Symfony\Component\HttpFoundation\Response
     *
     * @throws \Throwable
     */
    public function render($request, Throwable $exception)
    {
        return parent::render($request, $exception);
    }

    public function sendEmail(Throwable $exception)
    {
        try {
            $e = FlattenException::create($exception);
            $handler = new HtmlErrorRenderer(true);
            $css = $handler->getStylesheet();
            $content = $handler->getBody($e);
            $to = config('app.exception_mail');
            $subject = config('app.name') . ' Exception: ' . $this->exceptionMailContextLine();

            if ($to) {
                Mail::send('emails.exception', compact('css', 'content'), function ($message) use ($to, $subject) {
                    $message->to($to)->subject($subject);
                });
            }
        } catch (Throwable $ex) {
            file_put_contents(
                storage_path('logs/laravel-' . date('Y-m-d') . '.log'),
                '[' . date('Y-m-d H:i:s') . '] exception-handler-error: ' . $ex->getMessage() . "\n",
                FILE_APPEND
            );
        }
    }
}