<?php

declare(strict_types=1);

namespace ProCalendarWP\Maps;

final class MapSettings
{
    public static function register(): void
    {
        add_submenu_page('edit.php?post_type=pcwp_event', __('Maps', 'proeventswp'), __('Maps', 'proeventswp'), 'manage_pcwp_events', 'pcwp-maps', [self::class, 'render']);
    }

    public static function settings(): void
    {
        register_setting('pcwp_maps', 'pcwp_map_tile_url', [
            'type' => 'string',
            'default' => 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
            'sanitize_callback' => static function (mixed $value): string {
                if ($value === null) {
                    return (string) get_option('pcwp_map_tile_url', 'https://tile.openstreetmap.org/{z}/{x}/{y}.png');
                }
                $value = sanitize_text_field((string) $value);
                return str_starts_with($value, 'https://') && str_contains($value, '{z}') && str_contains($value, '{x}') && str_contains($value, '{y}')
                    ? $value
                    : 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';
            },
        ]);
        register_setting('pcwp_maps', 'pcwp_map_attribution', [
            'type' => 'string', 'default' => '© OpenStreetMap contributors',
            'sanitize_callback' => static fn (mixed $value): string => $value === null ? (string) get_option('pcwp_map_attribution', '© OpenStreetMap contributors') : sanitize_text_field((string) $value),
        ]);
        register_setting('pcwp_maps', 'pcwp_geocoding_provider', ['sanitize_callback' => static fn (mixed $value): string => $value === 'geoapify' ? 'geoapify' : '']);
        register_setting('pcwp_maps', 'pcwp_geocoding_country', ['sanitize_callback' => static fn (mixed $value): string => preg_match('/^[a-z]{2}$/i', (string) $value) ? strtolower((string) $value) : '']);
        register_setting('pcwp_maps', 'pcwp_geocoding_key_input', ['sanitize_callback' => static function (mixed $value): string {
            if (! defined('PCWP_GEOCODING_API_KEY') && is_string($value) && trim($value) !== '') {
                GeocodingKey::set($value === '__remove__' ? '' : $value);
            }
            return '';
        }]);
        register_setting('pcwp_maps', 'pcwp_map_styles', ['sanitize_callback' => [self::class, 'sanitizeStyles']]);
    }

    /** @return list<array{id:string,label:string,type:string,url:string,attribution:string}> */
    public static function sanitizeStyles(mixed $value): array
    {
        $value = is_string($value) ? json_decode($value, true) : $value;
        $result = [];
        foreach (is_array($value) ? array_slice($value, 0, 20) : [] as $style) {
            if (! is_array($style)) {
                continue;
            }
            $url = (string) ($style['url'] ?? '');
            $parts = wp_parse_url($url);
            $id = sanitize_key((string) ($style['id'] ?? ''));
            $attribution = sanitize_text_field((string) ($style['attribution'] ?? ''));
            $type = ($style['type'] ?? '') === 'vector' ? 'vector' : 'raster';
            if ($id === '' || $id === 'default' || ! is_array($parts) || ($parts['scheme'] ?? '') !== 'https' || empty($parts['host']) || isset($parts['user']) || $attribution === '') {
                continue;
            }
            if ($type === 'raster' && (! str_contains($url, '{z}') || ! str_contains($url, '{x}') || ! str_contains($url, '{y}'))) {
                continue;
            }
            $result[$id] = ['id' => $id, 'label' => sanitize_text_field((string) ($style['label'] ?? $id)), 'type' => $type, 'url' => sanitize_text_field($url), 'attribution' => $attribution];
        }
        return array_values($result);
    }

    /** @return list<array{id:string,label:string,type:string,url:string,attribution:string}> */
    public static function styles(): array
    {
        return array_merge([[
            'id' => 'default', 'label' => __('Site default', 'proeventswp'), 'type' => 'raster',
            'url' => (string) get_option('pcwp_map_tile_url', 'https://tile.openstreetmap.org/{z}/{x}/{y}.png'),
            'attribution' => (string) get_option('pcwp_map_attribution', '© OpenStreetMap contributors'),
        ]], self::sanitizeStyles(get_option('pcwp_map_styles', [])));
    }

    public static function render(): void
    {
        if (! current_user_can('manage_pcwp_events')) {
            return;
        }
        ?>
        <form method="post" action="options.php">
        <?php settings_fields('pcwp_maps'); ?>
        <section class="pcwp-settings-panel" aria-labelledby="pcwp-map-display-heading"><h2 id="pcwp-map-display-heading"><?php esc_html_e('Map display', 'proeventswp'); ?></h2>
        <p class="description"><?php esc_html_e('Maps and manual pin placement work without an address lookup key.', 'proeventswp'); ?></p>
        <div class="pcwp-settings-field"><label for="pcwp_map_tile_url"><?php esc_html_e('Map tile URL template', 'proeventswp'); ?></label>
        <input class="regular-text" id="pcwp_map_tile_url" name="pcwp_map_tile_url" value="<?php echo esc_attr((string) get_option('pcwp_map_tile_url', 'https://tile.openstreetmap.org/{z}/{x}/{y}.png')); ?>"></div>
        <div class="pcwp-settings-field"><label for="pcwp_map_attribution"><?php esc_html_e('Map attribution', 'proeventswp'); ?></label>
        <input class="regular-text" id="pcwp_map_attribution" name="pcwp_map_attribution" value="<?php echo esc_attr((string) get_option('pcwp_map_attribution', '© OpenStreetMap contributors')); ?>"></div></section>
        <section class="pcwp-settings-panel" aria-labelledby="pcwp-address-heading"><h2 id="pcwp-address-heading"><?php esc_html_e('Optional address lookup', 'proeventswp'); ?></h2>
        <p><?php esc_html_e('Address suggestions send the text you type to the selected provider. No lookup is performed when saving or viewing events.', 'proeventswp'); ?></p>
        <div class="pcwp-settings-field"><label for="pcwp_geocoding_provider"><?php esc_html_e('Address lookup provider', 'proeventswp'); ?></label><select id="pcwp_geocoding_provider" name="pcwp_geocoding_provider"><option value=""><?php esc_html_e('Manual entry only', 'proeventswp'); ?></option><option value="geoapify" <?php selected(get_option('pcwp_geocoding_provider'), 'geoapify'); ?>>Geoapify</option></select></div>
        <div class="pcwp-settings-field"><label for="pcwp_geocoding_key_input"><?php esc_html_e('Geocoding API key (server-only)', 'proeventswp'); ?></label><input type="password" id="pcwp_geocoding_key_input" name="pcwp_geocoding_key_input" autocomplete="new-password" value="" <?php disabled(defined('PCWP_GEOCODING_API_KEY')); ?> aria-describedby="pcwp-geocoding-help"></div>
        <p class="description" id="pcwp-geocoding-help"><?php echo esc_html(defined('PCWP_GEOCODING_API_KEY') ? __('Key supplied by PCWP_GEOCODING_API_KEY.', 'proeventswp') : (GeocodingKey::get() !== '' ? __('A key is configured. Leave blank to keep it; enter __remove__ to delete it.', 'proeventswp') : __('No key configured. Prefer the PCWP_GEOCODING_API_KEY configuration constant.', 'proeventswp'))); ?></p>
        <div class="pcwp-settings-field"><label for="pcwp_geocoding_country"><?php esc_html_e('Preferred country (two-letter code, optional)', 'proeventswp'); ?></label><input id="pcwp_geocoding_country" name="pcwp_geocoding_country" maxlength="2" value="<?php echo esc_attr((string) get_option('pcwp_geocoding_country', '')); ?>"></div></section>
        <section class="pcwp-settings-panel" aria-labelledby="pcwp-styles-heading"><h2 id="pcwp-styles-heading"><?php esc_html_e('Additional map styles', 'proeventswp'); ?></h2>
        <p><?php esc_html_e('Configure provider-supplied street, light or dark styles here. Each JSON entry requires id, label, type (raster or vector), HTTPS url and attribution. Raster URLs need {z}/{x}/{y}. Vector URLs point to MapLibre style JSON. Map display above supplies the default style.', 'proeventswp'); ?></p>
        <p><?php esc_html_e('Map URLs and any keys in them are public. Use a separate browser map key restricted to your site domains. Never put your server-only geocoding key here.', 'proeventswp'); ?></p>
        <div class="pcwp-settings-field"><label for="pcwp_map_styles"><?php esc_html_e('Styles JSON', 'proeventswp'); ?></label>
        <textarea class="large-text code" rows="10" id="pcwp_map_styles" name="pcwp_map_styles"><?php echo esc_textarea((string) wp_json_encode(get_option('pcwp_map_styles', []), JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES)); ?></textarea>
        </div></section><?php submit_button(); ?></form>
        <?php
    }
}