<?php
defined( 'ABSPATH' ) || exit;

class ADCT_LLMS_Sold_Detector {

	/**
	 * @param int   $product_id Product post ID.
	 * @param array $settings   Plugin settings.
	 */
	public static function is_sold( $product_id, array $settings ) {
		$product_id = absint( $product_id );

		if ( $product_id <= 0 || 'product' !== get_post_type( $product_id ) ) {
			return false;
		}

		$rules = $settings['sold_rules'] ?? array();

		if ( empty( $rules ) ) {
			return false;
		}

		foreach ( $rules as $rule ) {
			if ( self::matches_rule( $product_id, $rule ) ) {
				return true;
			}
		}

		return false;
	}

	private static function matches_rule( $product_id, array $rule ) {
		$type = $rule['type'] ?? '';

		switch ( $type ) {
			case 'product_tag':
			case 'product_cat':
			case 'taxonomy':
				$taxonomy = sanitize_key( $rule['taxonomy'] ?? '' );
				$term     = sanitize_title( $rule['term'] ?? '' );
				if ( '' === $taxonomy || '' === $term || ! taxonomy_exists( $taxonomy ) ) {
					return false;
				}
				return has_term( $term, $taxonomy, $product_id );

			case 'stock_status':
				if ( ! function_exists( 'wc_get_product' ) ) {
					return false;
				}
				$product = wc_get_product( $product_id );
				if ( ! $product ) {
					return false;
				}
				$wanted = sanitize_key( $rule['value'] ?? 'outofstock' );
				return $product->get_stock_status() === $wanted;

			case 'post_meta':
				$key = sanitize_key( $rule['key'] ?? '' );
				if ( '' === $key ) {
					return false;
				}
				$value    = get_post_meta( $product_id, $key, true );
				$expected = (string) ( $rule['value'] ?? '' );
				if ( '' === $expected ) {
					return (bool) $value;
				}
				return (string) $value === $expected;
		}

		return false;
	}

	/**
	 * @param array $settings Plugin settings.
	 */
	public static function should_include_sold( array $settings, $file ) {
		if ( 'full' === $file ) {
			return ! empty( $settings['include_sold_full'] );
		}

		return ! empty( $settings['include_sold_llms'] );
	}
}