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

class ADCT_LLMS_Settings {

	const OPTION = 'adct_llms_settings';

	const CRON_HOOK = 'adct_llms_regenerate_files';

	public static function init() {
	}

	public static function get_defaults() {
		return array(
			'enabled'              => true,
			'site_title'           => '',
			'site_summary'         => '',
			'disable_yoast_llms'   => true,
			'auto_regenerate'      => 'weekly',
			'add_robots_comment'   => false,
			'shop_page_id'         => 0,
			'brands_parent_id'     => 0,
			'brands_taxonomy'      => 'product_brand',
			'pinned_page_ids'      => array(),
			'excluded_page_ids'    => array(),
			'excluded_post_ids'    => array(),
			'excluded_product_ids' => array(),
			'skip_yoast_noindex'   => false,
			'sold_rules'           => array(
				array(
					'type'     => 'product_tag',
					'taxonomy' => 'product_tag',
					'term'     => 'sold-cars',
				),
			),
			'include_sold_llms'    => false,
			'include_sold_full'    => true,
			'llms'                 => self::default_file_sections( 'llms' ),
			'full'                 => self::default_file_sections( 'full' ),
			'cpts'                 => array(),
		);
	}

	private static function default_file_sections( $file ) {
		$is_full = ( 'full' === $file );

		return array(
			'pages'    => array(
				'enabled' => $is_full,
				'mode'    => $is_full ? 'all' : 'none',
				'limit'   => 0,
				'ids'     => array(),
				'title'   => __( 'Pages', 'adct-llm-index' ),
			),
			'products' => array(
				'enabled' => true,
				'mode'    => $is_full ? 'all' : 'latest',
				'limit'   => $is_full ? 0 : 10,
				'ids'     => array(),
				'title'   => $is_full ? __( 'Products', 'adct-llm-index' ) : __( 'Featured inventory', 'adct-llm-index' ),
			),
			'posts'    => array(
				'enabled' => true,
				'mode'    => $is_full ? 'all' : 'latest',
				'limit'   => $is_full ? 0 : 5,
				'ids'     => array(),
				'title'   => __( 'Posts', 'adct-llm-index' ),
			),
			'brands'   => array(
				'enabled' => true,
				'mode'    => 'taxonomy',
				'limit'   => $is_full ? 0 : 0,
				'ids'     => array(),
				'title'   => __( 'Brands', 'adct-llm-index' ),
			),
			'cpts'     => array(),
		);
	}

	public static function get() {
		$stored = get_option( self::OPTION, array() );

		if ( ! is_array( $stored ) ) {
			$stored = array();
		}

		return self::sanitize( wp_parse_args( $stored, self::get_defaults() ) );
	}

	public static function update( array $settings ) {
		update_option( self::OPTION, self::sanitize( self::preprocess_form( $settings ) ) );
	}

	public static function preprocess_form( array $input ) {
		foreach ( array( 'llms', 'full' ) as $file ) {
			if ( empty( $input[ $file ] ) || ! is_array( $input[ $file ] ) ) {
				continue;
			}

			foreach ( $input[ $file ] as $key => $section ) {
				if ( ! is_array( $section ) ) {
					continue;
				}
				$input[ $file ][ $key ] = self::merge_ids_text( $section );
			}
		}

		if ( ! empty( $input['cpts'] ) && is_array( $input['cpts'] ) ) {
			foreach ( $input['cpts'] as $post_type => $section ) {
				if ( is_array( $section ) ) {
					$input['cpts'][ $post_type ] = self::merge_ids_text( $section );
				}
			}
		}

		foreach ( array( 'excluded_post_ids', 'excluded_product_ids' ) as $key ) {
			if ( isset( $input[ $key . '_text' ] ) ) {
				$parts         = preg_split( '/[\s,]+/', (string) $input[ $key . '_text' ] );
				$input[ $key ] = array_values( array_filter( array_map( 'absint', (array) $parts ) ) );
				unset( $input[ $key . '_text' ] );
			}
		}

		return $input;
	}

	private static function merge_ids_text( array $section ) {
		if ( array_key_exists( 'ids_text', $section ) ) {
			$text = trim( (string) ( $section['ids_text'] ?? '' ) );
			if ( '' === $text ) {
				$section['ids'] = array();
			} else {
				$parts          = preg_split( '/[\s,]+/', $text );
				$section['ids'] = array_values( array_filter( array_map( 'absint', (array) $parts ) ) );
			}
			unset( $section['ids_text'] );
		}

		return $section;
	}

	public static function sanitize( $input ) {
		$defaults = self::get_defaults();
		$input    = is_array( $input ) ? $input : array();
		$clean    = wp_parse_args( $input, $defaults );

		$clean['enabled']            = ! empty( $input['enabled'] );
		$clean['site_title']         = sanitize_text_field( $clean['site_title'] ?? '' );
		$clean['site_summary']       = sanitize_textarea_field( $clean['site_summary'] ?? '' );
		$clean['disable_yoast_llms'] = ! empty( $input['disable_yoast_llms'] );
		$clean['add_robots_comment'] = ! empty( $input['add_robots_comment'] );
		$clean['include_sold_llms']  = ! empty( $input['include_sold_llms'] );
		$clean['include_sold_full']  = ! empty( $input['include_sold_full'] );

		$auto = sanitize_key( $clean['auto_regenerate'] ?? 'weekly' );
		$clean['auto_regenerate'] = in_array( $auto, array( 'manual', 'publish', 'daily', 'weekly' ), true ) ? $auto : 'weekly';

		$clean['shop_page_id']     = absint( $clean['shop_page_id'] ?? 0 );
		$clean['brands_parent_id'] = absint( $clean['brands_parent_id'] ?? 0 );
		$clean['brands_taxonomy']  = sanitize_key( $clean['brands_taxonomy'] ?? 'product_brand' );
		$clean['pinned_page_ids']      = self::sanitize_ids( $input['pinned_page_ids'] ?? array() );
		$clean['excluded_page_ids']    = self::sanitize_ids( $input['excluded_page_ids'] ?? array() );
		$clean['excluded_post_ids']    = self::sanitize_ids( $input['excluded_post_ids'] ?? array() );
		$clean['excluded_product_ids'] = self::sanitize_ids( $input['excluded_product_ids'] ?? array() );
		$clean['skip_yoast_noindex']   = ! empty( $input['skip_yoast_noindex'] );
		$clean['sold_rules']           = self::sanitize_sold_rules( $input['sold_rules'] ?? array() );
		$clean['llms']                 = self::sanitize_file_sections( $input['llms'] ?? array(), 'llms' );
		$clean['full']                 = self::sanitize_file_sections( $input['full'] ?? array(), 'full' );
		$clean['cpts']                 = self::sanitize_cpts( $input['cpts'] ?? array() );

		if ( ! empty( $clean['cpts'] ) ) {
			$clean['llms']['cpts'] = $clean['cpts'];
			$clean['full']['cpts'] = $clean['cpts'];
		}

		return $clean;
	}

	private static function sanitize_ids( $ids ) {
		if ( ! is_array( $ids ) ) {
			return array();
		}

		return array_values( array_filter( array_map( 'absint', $ids ) ) );
	}

	private static function sanitize_sold_rules( $rules ) {
		if ( ! is_array( $rules ) ) {
			return array();
		}

		$clean = array();

		foreach ( $rules as $rule ) {
			if ( ! is_array( $rule ) ) {
				continue;
			}

			$type = sanitize_key( $rule['type'] ?? '' );
			if ( ! in_array( $type, array( 'product_tag', 'product_cat', 'taxonomy', 'stock_status', 'post_meta' ), true ) ) {
				continue;
			}

			$entry = array( 'type' => $type );

			switch ( $type ) {
				case 'product_tag':
					$entry['taxonomy'] = 'product_tag';
					$entry['term']       = sanitize_title( $rule['term'] ?? 'sold-cars' );
					break;
				case 'product_cat':
					$entry['taxonomy'] = 'product_cat';
					$entry['term']       = sanitize_title( $rule['term'] ?? 'sold' );
					break;
				case 'taxonomy':
					$entry['taxonomy'] = sanitize_key( $rule['taxonomy'] ?? '' );
					$entry['term']       = sanitize_title( $rule['term'] ?? '' );
					if ( '' === $entry['taxonomy'] || '' === $entry['term'] ) {
						continue 2;
					}
					break;
				case 'stock_status':
					$entry['value'] = sanitize_key( $rule['value'] ?? 'outofstock' );
					break;
				case 'post_meta':
					$entry['key']   = sanitize_key( $rule['key'] ?? '' );
					$entry['value'] = sanitize_text_field( $rule['value'] ?? '' );
					if ( '' === $entry['key'] ) {
						continue 2;
					}
					break;
			}

			$clean[] = $entry;
		}

		return $clean;
	}

	private static function sanitize_file_sections( $sections, $file ) {
		$defaults = self::default_file_sections( $file );
		$sections = is_array( $sections ) ? $sections : array();
		$clean    = array();

		foreach ( array( 'pages', 'products', 'posts', 'brands' ) as $key ) {
			$raw     = $sections[ $key ] ?? array();
			$raw     = is_array( $raw ) ? $raw : array();
			$section = wp_parse_args( $raw, $defaults[ $key ] );
			$mode    = sanitize_key( $section['mode'] ?? 'latest' );

			$allowed_modes = array( 'all', 'latest', 'selected', 'pinned', 'children', 'taxonomy', 'none' );
			if ( ! in_array( $mode, $allowed_modes, true ) ) {
				$mode = 'latest';
			}

			$clean[ $key ] = array(
				'enabled' => ! empty( $raw['enabled'] ),
				'mode'    => $mode,
				'limit'   => max( 0, absint( $section['limit'] ?? 0 ) ),
				'ids'     => self::sanitize_ids( $section['ids'] ?? array() ),
				'title'   => sanitize_text_field( $section['title'] ?? $defaults[ $key ]['title'] ),
			);
		}

		return $clean;
	}

	private static function sanitize_cpts( $cpts ) {
		if ( ! is_array( $cpts ) ) {
			return array();
		}

		$clean = array();

		foreach ( $cpts as $post_type => $section ) {
			$post_type = sanitize_key( $post_type );
			if ( '' === $post_type || ! post_type_exists( $post_type ) ) {
				continue;
			}

			$object = get_post_type_object( $post_type );
			if ( ! $object || empty( $object->public ) ) {
				continue;
			}

			$raw     = is_array( $section ) ? $section : array();
			$merged  = wp_parse_args(
				$raw,
				array(
					'mode'  => 'latest',
					'limit' => 5,
					'title' => $object->labels->name,
				)
			);
			$mode    = sanitize_key( $merged['mode'] ?? 'latest' );
			if ( ! in_array( $mode, array( 'all', 'latest', 'selected', 'none' ), true ) ) {
				$mode = 'latest';
			}

			$clean[ $post_type ] = array(
				'enabled' => ! empty( $raw['enabled'] ),
				'mode'    => $mode,
				'limit'   => max( 0, absint( $merged['limit'] ?? 5 ) ),
				'ids'     => self::sanitize_ids( $merged['ids'] ?? array() ),
				'title'   => sanitize_text_field( $merged['title'] ?? $object->labels->name ),
			);
		}

		return $clean;
	}


	public static function is_yoast_active() {
		return ADCT_LLMS_Yoast::is_active();
	}

	public static function get_site_title() {
		$settings = self::get();
		$title    = trim( (string) ( $settings['site_title'] ?? '' ) );

		return '' !== $title ? $title : get_bloginfo( 'name' );
	}

	public static function get_public_post_types() {
		$types = get_post_types(
			array(
				'public' => true,
			),
			'objects'
		);

		$skip = array( 'attachment', 'product', 'page', 'post' );
		$list = array();

		foreach ( $types as $name => $object ) {
			if ( in_array( $name, $skip, true ) ) {
				continue;
			}
			$list[ $name ] = $object;
		}

		return $list;
	}
}