<?php
/**
 * Tip type (percent presets + custom amount).
 *
 * @package Extrova
 */

declare( strict_types=1 );

namespace Extrova\Types;

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

defined( 'ABSPATH' ) || exit;

/**
 * Tip: percentages of the subtotal or a custom amount clamped to [min, max] on the server.
 *
 * Value: `[ 'preset' => '10' ]` or `[ 'custom' => '3.50' ]`. The classic form sends
 * `[ 'preset' => 'custom', 'custom' => '3,50' ]`, which is normalised the same way.
 *
 * @since 1.0.0
 */
final class TipType extends AbstractExtraType {

	public const MAX_PRESETS = 6;

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

	/**
	 * {@inheritDoc}
	 */
	public function label(): string {
		return __( 'Tip', 'extrova' );
	}

	/**
	 * {@inheritDoc}
	 */
	public function config_schema(): array {
		return array(
			'type'       => 'object',
			'properties' => array(
				'presets'      => array(
					'type'     => 'array',
					'maxItems' => self::MAX_PRESETS,
					'items'    => array( 'type' => array( 'number', 'string' ) ),
				),
				'allow_custom' => array( 'type' => 'boolean' ),
				'min'          => array( 'type' => 'string' ),
				'max'          => array( 'type' => 'string' ),
				'base'         => array(
					'type' => 'string',
					'enum' => array( 'subtotal' ),
				),
			),
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param array $config Raw config.
	 */
	public function sanitize_config( array $config ): array {
		$presets = array();
		foreach ( (array) ( $config['presets'] ?? array( 5, 10, 15 ) ) as $preset ) {
			$preset = (string) wc_format_decimal( is_scalar( $preset ) ? (string) $preset : '0', 2, true );
			if ( (float) $preset > 0 && (float) $preset <= 100 && ! in_array( $preset, $presets, true ) ) {
				$presets[] = $preset;
			}
		}
		$presets = array_slice( $presets, 0, self::MAX_PRESETS );
		$min     = max( 0.0, (float) wc_format_decimal( (string) ( $config['min'] ?? '0' ) ) );
		$max     = max( 0.0, (float) wc_format_decimal( (string) ( $config['max'] ?? '50' ) ) );
		if ( $max < $min ) {
			$max = $min;
		}
		return array(
			'presets'      => $presets,
			'allow_custom' => rest_sanitize_boolean( $config['allow_custom'] ?? true ),
			'min'          => Money::decimal( $min ),
			'max'          => Money::decimal( $max ),
			'base'         => 'subtotal',
		);
	}

	/**
	 * Configured presets as strings.
	 *
	 * @param Extra $extra Extra.
	 * @return string[]
	 */
	private function presets( Extra $extra ): array {
		return array_values( array_map( 'strval', (array) ( $extra->type_config['presets'] ?? array() ) ) );
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param mixed $raw   Raw value.
	 * @param Extra $extra Extra.
	 */
	public function sanitize_value( mixed $raw, Extra $extra ): mixed {
		if ( ! is_array( $raw ) ) {
			return null;
		}
		$preset = isset( $raw['preset'] ) && is_scalar( $raw['preset'] ) ? (string) $raw['preset'] : '';

		if ( '' !== $preset && 'custom' !== $preset ) {
			$preset = (string) wc_format_decimal( $preset, 2, true );
			return in_array( $preset, $this->presets( $extra ), true ) ? array( 'preset' => $preset ) : null;
		}

		if ( ( 'custom' === $preset || array_key_exists( 'custom', $raw ) ) && ! empty( $extra->type_config['allow_custom'] ) ) {
			$custom = isset( $raw['custom'] ) && is_scalar( $raw['custom'] ) ? (string) $raw['custom'] : '';
			if ( '' === trim( $custom ) ) {
				return null;
			}
			$amount = (float) wc_format_decimal( $custom );
			$min    = (float) ( $extra->type_config['min'] ?? 0 );
			$max    = (float) ( $extra->type_config['max'] ?? 0 );
			$amount = max( $min, min( $max, $amount ) );
			return $amount > 0 ? array( 'custom' => Money::decimal( $amount ) ) : null;
		}

		return null;
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function is_chargeable( Extra $extra, Selection $selection ): bool {
		return is_array( $selection->value ) && ( isset( $selection->value['preset'] ) || isset( $selection->value['custom'] ) );
	}

	/**
	 * {@inheritDoc}
	 *
	 * Percent presets use the `percent_subtotal` method; custom amounts use `fixed`.
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function pricing_for( Extra $extra, Selection $selection ): array {
		$value = is_array( $selection->value ) ? $selection->value : array();
		if ( isset( $value['preset'] ) ) {
			return array(
				'method'  => 'percent_subtotal',
				'percent' => (string) $value['preset'],
			);
		}
		if ( isset( $value['custom'] ) ) {
			return array(
				'method' => 'fixed',
				'amount' => (string) $value['custom'],
			);
		}
		return array();
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 */
	public function display_value( Extra $extra, Selection $selection ): string {
		$value = is_array( $selection->value ) ? $selection->value : array();
		if ( isset( $value['preset'] ) ) {
			return sprintf(
				/* translators: %s: percentage number. */
				__( '%s%%', 'extrova' ),
				wc_format_localized_decimal( (string) $value['preset'] )
			);
		}
		if ( isset( $value['custom'] ) ) {
			return Money::plain( (string) $value['custom'] );
		}
		return '';
	}

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

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra   $extra   Extra.
	 * @param Context $context Context.
	 */
	public function to_client( Extra $extra, Context $context ): array {
		return array(
			'presets'      => $this->presets( $extra ),
			'allow_custom' => ! empty( $extra->type_config['allow_custom'] ),
			'min'          => (string) ( $extra->type_config['min'] ?? '0' ),
			'max'          => (string) ( $extra->type_config['max'] ?? '0' ),
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param Extra $extra Extra.
	 */
	public function preview_selections( Extra $extra ): array {
		$previews = array();
		foreach ( $this->presets( $extra ) as $preset ) {
			$previews[ $preset ] = array( 'preset' => $preset );
		}
		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 {
		$value       = $selection && is_array( $selection->value ) ? $selection->value : array();
		$current     = isset( $value['preset'] ) ? (string) $value['preset'] : ( isset( $value['custom'] ) ? 'custom' : '' );
		$custom      = isset( $value['custom'] ) ? (string) $value['custom'] : '';
		$name        = $this->field_name( $extra, 'preset' );
		$custom_id   = $this->field_id( $extra, 'custom-amount' );
		$custom_wrap = $this->field_id( $extra, 'custom-wrap' );

		$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 extrova-extra__options--inline">';

		if ( ! $extra->required ) {
			$none_id = $this->field_id( $extra, 'none' );
			$html   .= '<li><input type="radio" class="input-radio" id="' . esc_attr( $none_id ) . '" name="' . esc_attr( $name ) . '" value=""' . ( '' === $current ? ' checked="checked"' : '' ) . ' /> <label for="' . esc_attr( $none_id ) . '">' . esc_html__( 'No tip', 'extrova' ) . '</label></li>';
		}
		foreach ( $this->presets( $extra ) as $preset ) {
			$preset_id = $this->field_id( $extra, 'p' . str_replace( '.', '-', $preset ) );
			$label     = sprintf(
				/* translators: %s: percentage number. */
				__( '%s%%', 'extrova' ),
				wc_format_localized_decimal( $preset )
			);
			$html .= '<li><input type="radio" class="input-radio" id="' . esc_attr( $preset_id ) . '" name="' . esc_attr( $name ) . '" value="' . esc_attr( $preset ) . '"' . ( $current === $preset ? ' checked="checked"' : '' ) . ' /> <label for="' . esc_attr( $preset_id ) . '">' . esc_html( $label ) . $this->price_hint_html( $extra, $context, $preset ) . '</label></li>';
		}
		if ( ! empty( $extra->type_config['allow_custom'] ) ) {
			$other_id = $this->field_id( $extra, 'other' );
			$html    .= '<li><input type="radio" class="input-radio" id="' . esc_attr( $other_id ) . '" name="' . esc_attr( $name ) . '" value="custom" aria-controls="' . esc_attr( $custom_wrap ) . '"' . ( 'custom' === $current ? ' checked="checked"' : '' ) . ' /> <label for="' . esc_attr( $other_id ) . '">' . esc_html__( 'Other amount', 'extrova' ) . '</label></li>';
		}
		$html .= '</ul>';

		if ( ! empty( $extra->type_config['allow_custom'] ) ) {
			$min   = (string) ( $extra->type_config['min'] ?? '0' );
			$max   = (string) ( $extra->type_config['max'] ?? '0' );
			$html .= '<p class="extrova-extra__custom" id="' . esc_attr( $custom_wrap ) . '"' . ( 'custom' === $current ? '' : ' hidden="hidden"' ) . '>';
			$html .= '<label for="' . esc_attr( $custom_id ) . '">' . esc_html(
				sprintf(
					/* translators: %s: currency symbol. */
					__( 'Tip amount (%s)', 'extrova' ),
					html_entity_decode( get_woocommerce_currency_symbol(), ENT_QUOTES, 'UTF-8' )
				)
			) . '</label> ';
			$html .= '<input type="number" inputmode="decimal" class="input-text extrova-extra__amount" id="' . esc_attr( $custom_id ) . '" name="' . esc_attr( $this->field_name( $extra, 'custom' ) ) . '" min="' . esc_attr( $min ) . '" max="' . esc_attr( $max ) . '" step="0.01" value="' . esc_attr( $custom ) . '" />';
			$html .= '</p>';
		}

		$html .= '</fieldset>';
		return $html;
	}
}