<?php
declare(strict_types=1);

namespace ROITheme\Shared\Application\UseCases\RenderPostGrid;

/**
 * RenderPostGridRequest - DTO de entrada para renderizar post grid shortcode
 *
 * RESPONSABILIDAD: Encapsular todos los atributos del shortcode [roi_post_grid]
 *
 * USO:
 * ```php
 * $request = RenderPostGridRequest::fromArray([
 *     'category' => 'precios-unitarios',
 *     'posts_per_page' => 6,
 *     'columns' => 3
 * ]);
 * ```
 *
 * @package ROITheme\Shared\Application\UseCases\RenderPostGrid
 */
final readonly class RenderPostGridRequest
{
    public function __construct(
        public string $category = '',
        public string $excludeCategory = '',
        public string $tag = '',
        public string $author = '',
        public int $postsPerPage = 9,
        public int $columns = 3,
        public string $orderby = 'date',
        public string $order = 'DESC',
        public bool $showPagination = false,
        public int $offset = 0,
        public string $excludePosts = '',
        public bool $showThumbnail = true,
        public bool $showExcerpt = true,
        public bool $showMeta = true,
        public bool $showCategories = true,
        public int $excerptLength = 20,
        public string $class = '',
        public string $id = '',
        public int $paged = 1
    ) {}

    /**
     * Factory method: Crear desde array de atributos del shortcode
     *
     * @param array<string, mixed> $atts Atributos sanitizados del shortcode
     * @return self
     */
    public static function fromArray(array $atts): self
    {
        return new self(
            category: (string) ($atts['category'] ?? ''),
            excludeCategory: (string) ($atts['exclude_category'] ?? ''),
            tag: (string) ($atts['tag'] ?? ''),
            author: (string) ($atts['author'] ?? ''),
            postsPerPage: self::clampInt((int) ($atts['posts_per_page'] ?? 9), 1, 50),
            columns: self::clampInt((int) ($atts['columns'] ?? 3), 1, 4),
            orderby: self::sanitizeOrderby((string) ($atts['orderby'] ?? 'date')),
            order: self::sanitizeOrder((string) ($atts['order'] ?? 'DESC')),
            showPagination: self::toBool($atts['show_pagination'] ?? false),
            offset: max(0, (int) ($atts['offset'] ?? 0)),
            excludePosts: (string) ($atts['exclude_posts'] ?? ''),
            showThumbnail: self::toBool($atts['show_thumbnail'] ?? true),
            showExcerpt: self::toBool($atts['show_excerpt'] ?? true),
            showMeta: self::toBool($atts['show_meta'] ?? true),
            showCategories: self::toBool($atts['show_categories'] ?? true),
            excerptLength: max(1, (int) ($atts['excerpt_length'] ?? 20)),
            class: (string) ($atts['class'] ?? ''),
            id: (string) ($atts['id'] ?? ''),
            paged: max(1, (int) ($atts['paged'] ?? 1))
        );
    }

    /**
     * Convertir a array de parametros para QueryBuilder
     *
     * @return array<string, mixed>
     */
    public function toQueryParams(): array
    {
        return [
            'category' => $this->category,
            'exclude_category' => $this->excludeCategory,
            'tag' => $this->tag,
            'author' => $this->author,
            'posts_per_page' => $this->postsPerPage,
            'orderby' => $this->orderby,
            'order' => $this->order,
            'offset' => $this->offset,
            'exclude_posts' => $this->excludePosts,
            'paged' => $this->paged,
        ];
    }

    /**
     * Convertir a array de opciones para Renderer
     *
     * @return array<string, mixed>
     */
    public function toRenderOptions(): array
    {
        return [
            'columns' => $this->columns,
            'show_thumbnail' => $this->showThumbnail,
            'show_excerpt' => $this->showExcerpt,
            'show_meta' => $this->showMeta,
            'show_categories' => $this->showCategories,
            'excerpt_length' => $this->excerptLength,
            'class' => $this->class,
            'id' => $this->id,
            'show_pagination' => $this->showPagination,
            'posts_per_page' => $this->postsPerPage,
        ];
    }

    private static function clampInt(int $value, int $min, int $max): int
    {
        return max($min, min($max, $value));
    }

    private static function toBool(mixed $value): bool
    {
        if (is_bool($value)) {
            return $value;
        }
        return $value === 'true' || $value === '1' || $value === 1;
    }

    private static function sanitizeOrderby(string $value): string
    {
        $allowed = ['date', 'title', 'modified', 'rand', 'comment_count'];
        return in_array($value, $allowed, true) ? $value : 'date';
    }

    private static function sanitizeOrder(string $value): string
    {
        $upper = strtoupper($value);
        return in_array($upper, ['ASC', 'DESC'], true) ? $upper : 'DESC';
    }
}