<?php

namespace TFGraphics\SmartImport\Core;

class Loader
{
    private array $actions = [];
    private array $filters = [];
    private array $ajax = [];
    private array $cron = [];
    private array $shortcodes = [];
    private array $rest = [];

    public function addAction(string $hookName, object $component, string $callback, int $priority = 10, int $acceptedArgs = 1): void
    {
        $this->actions[] = compact('hookName', 'component', 'callback', 'priority', 'acceptedArgs');
    }

    public function addFilter(string $hookName, object $component, string $callback, int $priority = 10, int $acceptedArgs = 1): void
    {
        $this->filters[] = compact('hookName', 'component', 'callback', 'priority', 'acceptedArgs');
    }

    public function addAjax(string $action, object $component, string $callback, bool $authenticated = true): void
    {
        $this->ajax[] = compact('action', 'component', 'callback', 'authenticated');
    }

    public function addCron(string $hookName, object $component, string $callback, int $priority = 10): void
    {
        $this->cron[] = compact('hookName', 'component', 'callback', 'priority');
    }

    public function addShortcode(string $tag, object $component, string $callback): void
    {
        $this->shortcodes[] = compact('tag', 'component', 'callback');
    }

    public function addRest(string $namespace, string $route, array $args): void
    {
        // WordPress accepts one endpoint or a list of endpoints with route options.
        $endpoints = isset($args['callback'])
            ? [$args]
            : array_filter($args, 'is_numeric', ARRAY_FILTER_USE_KEY);

        if ($endpoints === []) {
            throw new \InvalidArgumentException('REST routes require at least one endpoint with an explicit permission_callback.');
        }

        // Validate the entire route before queueing any endpoint. Never infer public access.
        foreach ($endpoints as $endpoint) {
            if (! is_array($endpoint)
                || ! isset($endpoint['permission_callback'])
                || ! is_callable($endpoint['permission_callback'])
            ) {
                throw new \InvalidArgumentException('Every REST endpoint requires an explicit callable permission_callback.');
            }
        }

        $this->rest[] = [
            'namespace' => $namespace,
            'route' => $route,
            'args' => $args,
        ];
    }

    public function run(): void
    {
        foreach ($this->actions as $action) {
            add_action($action['hookName'], [$action['component'], $action['callback']], $action['priority'], $action['acceptedArgs']);
        }

        foreach ($this->filters as $filter) {
            add_filter($filter['hookName'], [$filter['component'], $filter['callback']], $filter['priority'], $filter['acceptedArgs']);
        }

        foreach ($this->ajax as $ajax) {
            $action = $ajax['authenticated'] ? 'wp_ajax_' . $ajax['action'] : 'wp_ajax_nopriv_' . $ajax['action'];
            add_action($action, [$ajax['component'], $ajax['callback']]);
        }

        foreach ($this->cron as $cron) {
            add_action($cron['hookName'], [$cron['component'], $cron['callback']], $cron['priority']);
        }

        foreach ($this->shortcodes as $shortcode) {
            add_shortcode($shortcode['tag'], [$shortcode['component'], $shortcode['callback']]);
        }

        foreach ($this->rest as $rest) {
            add_action('rest_api_init', function () use ($rest) {
                register_rest_route($rest['namespace'], $rest['route'], $rest['args']);
            });
        }
    }
}