<?php
/**
 * Choice type (radio or select, one price per option).
 *
 * @package Extrova
 */

declare( strict_types=1 );

namespace Extrova\Types;

use Extrova\Core\Context;
use Extrova\Core\Extra;
use Extrova\Core\Selection;

defined( 'ABSPATH' ) || exit;

/**
 * Radio buttons or select with per-option prices.
 *
 * @since 1.0.0
 */
final class ChoiceType extends AbstractExtraType {

	public const MAX_OPTIONS = 50;

	/**
	 * {@inheritDoc}
	 */
	public function slug(): string {
		return 'choice';
	}

	/**
	 * {@inheritDoc}
	 */
	public function label(): string {
		return __( 'Choice (radio or select)', 'extrova' );
	}

	/**
	 * {@inheritDoc}
	 */
	public function config_schema(): array {
		return array(
			'type'       => 'object',
			'properties' => array(
				'presentation' => array(
					'type' => 'string',
					'enum' => array( 'radio', 'select' ),
				),
				'allow_none'   => array( 'type' => 'boolean' ),
				'options'      => array(
					'type'     => 'array',
					'maxItems' => self::MAX_OPTIONS,
					'items'    => array(
						'type'       => 'object',
						'properties' => array(
							'id'      => array( 'type' => 'string' ),
							'label'   => array( 'type' => 'string' ),
							'pricing' => array( 'type' => 'object' ),
						),
					),
				),
			),
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * Option pricing blocks are normalised afterwards by Core\Schema with the pricing registry.
	 *
	 * @param array $config Raw config.
	 */
	public function sanitize_config( array $config ): array {
		$options = array();
		$seen    = array();
		foreach ( array_slice( (array) ( $config['options'] ?? array() ), 0, self::MAX_OPTIONS ) as $option ) {
			if ( ! is_array( $option ) ) {
				continue;
			}
			$label = sanitize_text_field( (string) ( $option['label'] ?? '' ) );
			if ( '' === $label ) {
				continue;
			}
			$id = sanitize_key( (string) ( $option['id'] ?? '' ) );
			if ( ! preg_match( '/^opt_[a-z0-9]{1,16}$/', $id ) || isset( $seen[ $id ] ) ) {
				$id = 'opt_' . bin2hex( random_bytes( 3 ) );
			}
			$seen[ $id ] = true;
			$options[]   = array(
				'id'      => $id,
				'label'   => $label,
				'pricing' => is_array( $option['pricing'] ?? null ) ? $option['pricing'] : array(),
			);
		}

		$presentation = (string) ( $config['presentation'] ?? 'radio' );

		return array(
			'presentation' => in_array( $presentation, array( 'radio', 'select' ), true ) ? $presentation : 'radio',
			'allow_none'   => rest_sanitize_boolean( $config['allow_none'] ?? true ),
			'options'      => $options,
		);
	}

	/**
	 * Options of the extra.
	 *
	 * @param Extra $extra Extra.
	 * @return array<int, array{id: string, label: string, pricing: array}>
	 */
	private function options( Extra $extra ): array {
		$options = array();
		foreach ( (array) ( $extra->type_config['options'] ?? array() ) as $option ) {
			if ( is_array( $option ) && ! empty( $option['id'] ) ) {
				$options[] = array(
					'id'      => (string) $option['id'],
					'label'   => (string) ( $option['label'] ?? '' ),
					'pricing' => is_array( $option['pricing'] ?? null ) ? $option['pricing'] : array(),
				);
			}
		}
		return $options;
	}

	/**
	 * Finds an option.
	 *
	 * @param Extra $extra Extra.
	 * @param mixed $id    Option id.
	 */
	private function option( Extra $extra, mixed $id ): ?array {
		if ( ! is_string( $id ) ) {
			return null;
		}
		foreach ( $this->options( $extra ) as $option ) {
			if ( $option['id'] === $id ) {
				return $option;
			}
		}
		return null;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param mixed $raw   Raw value.
	 * @param Extra $extra Extra.
	 */
	public function sanitize_value( mixed $raw, Extra $extra ): mixed {
		if ( ! is_string( $raw ) ) {
			return null;
		}
		$id = sanitize_key( $raw );
		return null !== $this->option( $extra, $id ) ? $id : null;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function is_chargeable( Extra $extra, Selection $selection ): bool {
		return null !== $this->option( $extra, $selection->value );
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function pricing_for( Extra $extra, Selection $selection ): array {
		$option = $this->option( $extra, $selection->value );
		if ( $option && array() !== $option['pricing'] && ! empty( $option['pricing']['method'] ) ) {
			return $option['pricing'];
		}
		return $extra->pricing;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function display_value( Extra $extra, Selection $selection ): string {
		$option = $this->option( $extra, $selection->value );
		return $option ? $option['label'] : '';
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function fee_name( Extra $extra, Selection $selection ): string {
		$value = $this->display_value( $extra, $selection );
		if ( '' === $value ) {
			return $extra->label;
		}
		return sprintf(
			/* translators: 1: extra label, 2: chosen option. */
			__( '%1$s: %2$s', 'extrova' ),
			$extra->label,
			$value
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra   $extra   Extra.
	 * @param Context $context Context.
	 */
	public function to_client( Extra $extra, Context $context ): array {
		return array(
			'presentation' => (string) ( $extra->type_config['presentation'] ?? 'radio' ),
			'allow_none'   => ! empty( $extra->type_config['allow_none'] ),
			'options'      => array_map(
				static fn( array $option ): array => array(
					'id'    => $option['id'],
					'label' => $option['label'],
				),
				$this->options( $extra )
			),
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra $extra Extra.
	 */
	public function preview_selections( Extra $extra ): array {
		$previews = array();
		foreach ( $this->options( $extra ) as $option ) {
			$previews[ $option['id'] ] = $option['id'];
		}
		return $previews;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra          $extra     Extra.
	 * @param Selection|null $selection Selection.
	 * @param Context        $context   Context.
	 */
	public function render_classic( Extra $extra, ?Selection $selection, Context $context ): string {
		$current      = $selection ? $selection->value : null;
		$allow_none   = ! empty( $extra->type_config['allow_none'] ) || ! $extra->required;
		$presentation = (string) ( $extra->type_config['presentation'] ?? 'radio' );
		$options      = $this->options( $extra );

		if ( 'select' === $presentation ) {
			$id    = $this->field_id( $extra );
			$html  = '<div class="' . esc_attr( $this->wrapper_class( $extra ) ) . '" data-extrova-extra="' . esc_attr( $extra->id ) . '">';
			$html .= '<label class="extrova-extra__label" for="' . esc_attr( $id ) . '">' . esc_html( $extra->label ) . $this->required_marker_html( $extra ) . '</label>';
			$html .= $this->description_html( $extra );
			$html .= '<select class="extrova-extra__select" id="' . esc_attr( $id ) . '" name="' . esc_attr( $this->field_name( $extra ) ) . '"' . ( $extra->required ? ' aria-required="true"' : '' ) . $this->describedby_attr( $extra ) . '>';
			$html .= '<option value="">' . esc_html( $allow_none ? __( 'None', 'extrova' ) : __( 'Choose an option', 'extrova' ) ) . '</option>';
			foreach ( $options as $option ) {
				$hint  = wp_strip_all_tags( $this->price_hint_html( $extra, $context, $option['id'] ) );
				$html .= '<option value="' . esc_attr( $option['id'] ) . '"' . ( $current === $option['id'] ? ' selected="selected"' : '' ) . '>' . esc_html( $option['label'] . html_entity_decode( $hint, ENT_QUOTES, 'UTF-8' ) ) . '</option>';
			}
			$html .= '</select></div>';
			return $html;
		}

		$html  = '<fieldset class="' . esc_attr( $this->wrapper_class( $extra ) ) . '" data-extrova-extra="' . esc_attr( $extra->id ) . '"' . $this->describedby_attr( $extra ) . '>';
		$html .= '<legend class="extrova-extra__label">' . esc_html( $extra->label ) . $this->required_marker_html( $extra ) . '</legend>';
		$html .= $this->description_html( $extra );
		$html .= '<ul class="extrova-extra__options">';
		if ( $allow_none ) {
			$none_id = $this->field_id( $extra, 'none' );
			$html   .= '<li><input type="radio" class="input-radio" id="' . esc_attr( $none_id ) . '" name="' . esc_attr( $this->field_name( $extra ) ) . '" value=""' . ( null === $current || '' === $current ? ' checked="checked"' : '' ) . ' /> <label for="' . esc_attr( $none_id ) . '">' . esc_html__( 'None', 'extrova' ) . '</label></li>';
		}
		foreach ( $options as $option ) {
			$option_id = $this->field_id( $extra, $option['id'] );
			$html     .= '<li><input type="radio" class="input-radio" id="' . esc_attr( $option_id ) . '" name="' . esc_attr( $this->field_name( $extra ) ) . '" value="' . esc_attr( $option['id'] ) . '"' . ( $current === $option['id'] ? ' checked="checked"' : '' ) . ' /> <label for="' . esc_attr( $option_id ) . '">' . esc_html( $option['label'] ) . $this->price_hint_html( $extra, $context, $option['id'] ) . '</label></li>';
		}
		$html .= '</ul></fieldset>';
		return $html;
	}
}