<?php
/**
 * Shared map renderer used by both the shortcode and the block.
 *
 * Outputs a <div> carrying data-* attributes; assets/js/expressmaps-frontend.js
 * reads them and initialises a MapLibre map. All values are sanitised here
 * and escaped on output.
 *
 * @package ExpressMaps
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Default attribute set shared by the shortcode and the block.
 *
 * @return array
 */
function expressmaps_default_atts() {
	return array(
		'lat'      => 51.5,
		'lng'      => -0.12,
		'zoom'     => 13,
		'style'    => '',
		'height'   => '400px',
		'width'    => '100%',
		'marker'   => true,
		'popup'    => '',
		'controls' => true,
		'key'      => '',
	);
}

/**
 * Normalise raw attributes into a safe, typed array.
 *
 * @param array $atts Raw attributes (shortcode or block).
 * @return array
 */
function expressmaps_normalize_atts( $atts ) {
	$atts = wp_parse_args( (array) $atts, expressmaps_default_atts() );

	$key = '' !== (string) $atts['key'] ? expressmaps_sanitize_api_key( $atts['key'] ) : expressmaps_get_api_key();

	return array(
		'lat'      => expressmaps_clamp( $atts['lat'], -90, 90, 51.5 ),
		'lng'      => expressmaps_clamp( $atts['lng'], -180, 180, -0.12 ),
		'zoom'     => expressmaps_clamp( $atts['zoom'], 0, 22, 13 ),
		'style'    => expressmaps_sanitize_style( $atts['style'], expressmaps_get_default_style() ),
		'height'   => expressmaps_sanitize_length( $atts['height'] ) ?: '400px',
		'width'    => expressmaps_sanitize_length( $atts['width'] ) ?: '100%',
		'marker'   => expressmaps_to_bool( $atts['marker'], true ),
		'popup'    => sanitize_text_field( (string) $atts['popup'] ),
		'controls' => expressmaps_to_bool( $atts['controls'], true ),
		'key'      => $key,
	);
}

/**
 * Enqueue MapLibre and the front-end script. Called only when a map is rendered,
 * so the assets are loaded solely on pages that contain a shortcode or block.
 */
function expressmaps_enqueue_frontend() {
	if ( ! wp_script_is( 'expressmaps-frontend', 'registered' ) ) {
		expressmaps_register_assets();
	}
	wp_enqueue_style( 'expressmaps-frontend' );
	wp_enqueue_script( 'expressmaps-frontend' );
}

/**
 * Render a map container.
 *
 * @param array  $atts          Raw attributes.
 * @param string $extra_classes Extra CSS classes (e.g. block wrapper classes).
 * @return string HTML
 */
function expressmaps_render_map( $atts, $extra_classes = '' ) {
	$a = expressmaps_normalize_atts( $atts );

	if ( '' === $a['key'] ) {
		$msg = __( 'ExpressMaps: no API key set. Add one under Settings &rsaquo; ExpressMaps.', 'expressmaps' );
		if ( current_user_can( 'manage_options' ) ) {
			return '<div class="expressmaps-notice">' . wp_kses_post( $msg ) . '</div>';
		}
		return '';
	}

	expressmaps_enqueue_frontend();

	$id    = 'expressmaps-' . wp_unique_id();
	$class = trim( 'expressmaps-map ' . expressmaps_sanitize_class_list( $extra_classes ) );
	$style = sprintf( 'height:%s;width:%s;', $a['height'], $a['width'] );

	return sprintf(
		'<div id="%1$s" class="%2$s" style="%3$s" data-expressmaps="1" data-style-url="%4$s" data-lat="%5$s" data-lng="%6$s" data-zoom="%7$s" data-marker="%8$s" data-popup="%9$s" data-controls="%10$s" role="region" aria-label="%11$s"></div>',
		esc_attr( $id ),
		esc_attr( $class ),
		esc_attr( $style ),
		esc_url( expressmaps_style_url( $a['style'], $a['key'] ) ),
		esc_attr( $a['lat'] ),
		esc_attr( $a['lng'] ),
		esc_attr( $a['zoom'] ),
		$a['marker'] ? '1' : '0',
		esc_attr( $a['popup'] ),
		$a['controls'] ? '1' : '0',
		esc_attr__( 'Map', 'expressmaps' )
	);
}

/**
 * Sanitise a space-separated list of CSS classes.
 *
 * @param string $classes Raw class string.
 * @return string
 */
function expressmaps_sanitize_class_list( $classes ) {
	$out = array();
	foreach ( preg_split( '/\s+/', (string) $classes ) as $c ) {
		$c = sanitize_html_class( $c );
		if ( '' !== $c ) {
			$out[] = $c;
		}
	}
	return implode( ' ', $out );
}