<?php

namespace Subcon\Zap;
use Subcon\Zap\Config\Repository;
use Subcon\Zap\ErrorHandling\Handler;
use Subcon\Zap\Http\Response;
use Subcon\Zap\Routing\Router;

class Application
{
    const VERSION = '2.0.0';

    protected static $instance;

    protected string $basePath;

    protected Repository $config;

    protected Router $router;


    public function __construct(string $basePath = null)
    {
        if(!$basePath || !file_exists($basePath) || !is_dir($basePath)) {
            $basePath = implode('/', array_slice(explode('/', $_SERVER['SCRIPT_NAME']), 0, -2)) . '/';
        }

        //Initialize paths and load up environment and config files.
        static::$instance = $this;
        $this->setBasePath($basePath);
        $this->initConfiguration();
        $this->initErrorHandling();
        $this->initRouting();
    }

    public static function getInstance(): static
    {
        return static::$instance;
    }

    public function getBasePath($path = '')
    {
        return $this->basePath . (!empty($path) ? DIRECTORY_SEPARATOR.$path : '');
    }

    public function getPublicPath($path = '')
    {
        return $this->basePath . DIRECTORY_SEPARATOR . 'public_html' . (!empty($path) ? DIRECTORY_SEPARATOR.$path : '');
    }

    public function getViewPath($path = '')
    {
        return $this->basePath . DIRECTORY_SEPARATOR . 'resources/views' . (!empty($path) ? DIRECTORY_SEPARATOR.$path : '');
    }

    public function getConfig()
    {
        return $this->config;
    }

    public function run()
    {
        if(!$this->router) {
            (new Response('Could not get router instance, aborting.', 500))
                ->send();
        }

        $this->router->run();
    }


    protected function setBasePath($basePath): static
    {
        $this->basePath = rtrim($basePath, '\/');
        return $this;
    }

    protected function initConfiguration()
    {
        $this->config = new Repository($this);
    }

    protected function initErrorHandling()
    {
        set_error_handler(function (int $nr, string $error, ?string $file, ?int $line) {
            (new Handler($this))->reportError($nr, $error, $file, $line);
            $this->sendErrorResponse();
        });

        set_exception_handler(function (\Throwable $e) {
            (new Handler($this))->report($e);
            $this->sendErrorResponse();
        });
    }

    protected function initRouting()
    {
        $this->router = new Router($this);
    }

    protected function sendErrorResponse()
    {
        (new Response('Whoops, something went wrong.', 500))
            ->send();
    }
}