<?php

namespace Advanced_Columns\Frontend;

use Adbar\Dot;
use Advanced_Columns\Data\QueryDTO;
use Advanced_Columns\Helpers\Queries;

abstract class FrontendComponent {

	/**
	 * Get the value of a specific attribute key.
	 *
	 * @since 1.0.0
	 * @param string $key The attribute key.
	 * @param array $attributes The attributes array.
	 * @param QueryDTO $query The current query object.
	 * @return mixed
	 */
	public static function getValue( string $key, array $attributes, ?QueryDTO $query = null ) {
		$value  = null;
		$tokens = array();

		if ( false !== strpos( $key, '.' ) ) {
			$tokens = explode( '.', $key );

			$key = $tokens[ 0 ];
		}

		if ( ! $query ) {
			$query = Queries::default();
		}

		$overrideQuery = self::overrideTargetQuery( $attributes, $key, $query );

		if ( isset( $attributes[ $key ] ) && isset( $attributes[ $key ][ $overrideQuery->slug ] ) ) {
			$value = $attributes[ $key ][ $overrideQuery->slug ][ 'v' ];
		}

		if ( $tokens && is_array( $value ) ) {
			array_shift( $tokens );

			$dot   = new Dot( $value );
			$value = $dot->get( implode( '.', $tokens ) );
		}

		return $value;
	}

	/**
	 * Get the custom value of a specific attribute key.
	 *
	 * @since 1.0.15
	 * @param string $key The attribute key.
	 * @param array $attributes The attributes array.
	 * @param QueryDTO $query The current query object.
	 * @return mixed
	 */
	public static function getCustom( string $key, array $attributes, ?QueryDTO $query = null ) {
		$custom = false;

		if ( ! $query ) {
			$query = Queries::default();
		}

		$overrideQuery = self::overrideTargetQuery( $attributes, $key, $query );

		if ( isset( $attributes[ $key ] ) && isset( $attributes[ $key ][ $overrideQuery->slug ] ) && isset( $attributes[ $key ][ $overrideQuery->slug ][ 'custom' ] ) ) {
			$custom = boolval( $attributes[ $key ][ $overrideQuery->slug ][ 'custom' ] );
		}

		return $custom;
	}

	/**
	 * Get the unlink value of a specific attribute key.
	 *
	 * @since 1.0.15
	 * @param string $key The attribute key.
	 * @param array $attributes The attributes array.
	 * @param QueryDTO $query The current query object.
	 * @return mixed
	 */
	public static function getUnlink( string $key, array $attributes, ?QueryDTO $query = null ) {
		$unlink = false;

		if ( ! $query ) {
			$query = Queries::default();
		}

		$overrideQuery = self::overrideTargetQuery( $attributes, $key, $query );

		if ( isset( $attributes[ $key ] ) && isset( $attributes[ $key ][ $overrideQuery->slug ] ) && isset( $attributes[ $key ][ $overrideQuery->slug ][ 'unlink' ] ) ) {
			$unlink = boolval( $attributes[ $key ][ $overrideQuery->slug ][ 'unlink' ] );
		}

		return $unlink;
	}

	public static function overrideTargetQuery( array $attributes, string $fieldName, ?QueryDTO $query = null, ?QueryDTO $originalQuery = null ): QueryDTO {
		if ( ! $query ) {
			$query = Queries::default();
		}

		if ( ! $originalQuery ) {
			$originalQuery = $query;
		}

		if ( isset( $attributes[$fieldName][$query->slug]['o'] ) && is_string( $attributes[$fieldName][$query->slug]['o'] ) ) {
			$targetQuery = Queries::getBySlug( $attributes[ $fieldName ][ $query->slug ][ 'o' ] );

			if ( ! $targetQuery ) {
				return Queries::default();
			}

			if ( $targetQuery->slug === $originalQuery->slug ) {
				return Queries::default();
			}

			$targetQuery = self::overrideTargetQuery( $attributes, $fieldName, $targetQuery, $originalQuery );

			if ( ! empty( $attributes[$fieldName][$targetQuery->slug]->o ) && $attributes[$fieldName][$targetQuery->slug]->o === $originalQuery->slug ) {
				return $originalQuery;
			}

			if ( $targetQuery->slug !== $query->slug ) {
				return self::overrideTargetQuery( $attributes, $fieldName, Queries::getBySlug( $attributes[ $fieldName ][ $query->slug ][ 'o' ] ), $originalQuery );
			} else {
				$query = Queries::default();
			}
		}

		return $query;
	}

}