<?php
namespace DayTidy;

use DayTidy\Traits\Nonce;

class AjaxHandler
{
    use Nonce;

    protected string $action;

    protected bool $guest = false;

    protected string $nonce = '_wpnonce';

    protected ?string $capability = null;

    protected ?string $requestKey = null;

    /**
     * Constructor
     * @param mixed[] $args
     */
    public function __construct(array $args)
    {
        $this->action = $args['action'];
        $this->guest = $args['guest'] ?? false;
        $this->nonce_name = $args['nonce_name'] ?? '_wpnonce';
        $this->nonce_action = $args['nonce_action'] ?? $this->action;
        $this->capability = $args['capability'] ?? null;
        $this->requestKey = $args['request_key'] ?? null;

        // Default Action
        add_action('wp_ajax_'.$this->action, [$this, 'run']);

        // Gust Action
        if ($this->guest) add_action('wp_ajax_nopriv_'.$this->action, [$this, 'run']);
    }

    public function run(): void
    {
        // Nonce is not valid
        if (!$this->nonce_check()) $this->response([
            'success' => 0,
            'message' => esc_html__('Security nonce is invalid.', 'daytidy'),
            'code' => 'NONCE_IS_INVALID',
        ]);

        // Current User is not Permitted
        if ($this->capability and !current_user_can($this->capability)) $this->response([
            'success' => 0,
            'message' => esc_html__("You cannot access this section.", 'daytidy'),
            'code' => 'NO_ACCESS'
        ]);

        // Perform Ajax Handler
        if ($this instanceof Interfaces\AjaxHandler)
        {
            // Prepare Data
            $data = $this->requestKey ? ($_REQUEST[$this->requestKey] ?? []) : $_REQUEST;
            if (!is_array($data)) $this->response([
                'success' => 0,
                'message' => esc_html__('Invalid request data.', 'daytidy'),
                'code' => 'INVALID_REQUEST_DATA',
            ]);

            if (!$this->requestKey) unset($data['action'], $data[$this->nonce_name]);

            $data = Input::sanitize(wp_unslash($data));

            // Validate Request
            $validation = $this->validate($data);

            // Validation Failed
            if (!$validation->validRequest())
            {
                $errors = array_unique($validation->errors());
                $message = Html::listify($errors, count($errors) > 1 ? 'ol' : 'ul');
                $result = AjaxResult::failure($message);
            }
            else
            {
                // Do the Action
                $result = $this->perform($data);
            }

            // Response
            $this->response($result->response());
        }

        // Response
        $this->response([
            'success' => 0,
            'message' => esc_html__("Unknown error.", 'daytidy'),
            'code' => 'UNKNOWN_ERROR'
        ]);
    }

    /**
     * @param mixed[] $data
     * @return void
     */
    protected function response(array $data): void
    {
        wp_send_json($data);
    }
}