<?php

/*
 * This file is part of Advanced Custom Fields Multiple Coordinates.
 *
 * Advanced Custom Fields Multiple Coordinates is free software: you can redistribute it
 * and/or modify it under the terms of the GNU General Public License as
 * published by he Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * Advanced Custom Fields Multiple Coordinates is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Advanced Custom Fields Multiple Coordinates.
 * If not, see <http://www.gnu.org/licenses/>.
 *
 * Field type implementation for the legacy ACF 4 field API
 * (`acf/register_fields`). ACF 5 and later use fields-v5.php.
 */

class acfmc_field_multiple_coordinates_v4 extends acf_field
{
    public $defaults; // default field options

    /*
     * __construct
     */
    public function __construct()
    {
        $this->name = 'multiple-coordinates-field';
        $this->label = __('Coordinates map', 'advanced-custom-fields-multiple-coordinates');
        $this->category = __('Content', 'advanced-custom-fields-multiple-coordinates');

        // default values sets the map to center around Fliseryd/Mönserås Småland
        $this->defaults = array(
            'center' => array(
                'lat' => 57.13485135696844,
                'lng' => 16.292744633789084),
            'zoom' => 11
        );

        // call parent acf_field's constructor
        parent::__construct();

        // settings
        $this->settings = array(
            'path' => ACFMC_PATH,
            'dir' => ACFMC_URL,
            'version' => ACFMC_VERSION
        );
    }

    /*
    *  input_admin_enqueue_scripts
    *
    *  This action is called in the admin_enqueue_scripts action on the edit screen where your field is created.
    *  Use this action to add css + javascript to assist your create_field() action.
    */

    public function input_admin_enqueue_scripts()
    {
        // Google Maps API key — sajt-ägaren konfigurerar via ACF:s globala
        // setting (`acf_get_setting('google_api_key')`, samma nyckel som ACF:s
        // egna Google Map-field använder), eller via filter:
        //
        //   add_filter('acfmc_gmaps_key', function () { return 'AIza…'; });
        //
        // Utan nyckel laddar Google Maps i begränsat läge (watermark + modal).
        $gmaps_url = 'https://maps.googleapis.com/maps/api/js';
        $gmaps_key = function_exists('acf_get_setting') ? (string) acf_get_setting('google_api_key') : '';
        $gmaps_key = (string) apply_filters('acfmc_gmaps_key', $gmaps_key);
        if ($gmaps_key !== '') {
            $gmaps_url = add_query_arg('key', rawurlencode($gmaps_key), $gmaps_url);
        }

        // register scripts and css
        wp_register_style('acf-multiple-coordinates-field', $this->settings['dir'].'css/fields.css', array('wp-color-picker', 'dashicons'), ACFMC_VERSION);
        wp_register_script('googlemaps-api', $gmaps_url, array(), null, false);
        wp_register_script('acf-multiple-coordinates-map', $this->settings['dir'].'js/map.js', array('jquery', 'jquery-ui-sortable', 'wp-color-picker', 'googlemaps-api'), ACFMC_VERSION, false);

        // strings for the map UI
        wp_localize_script('acf-multiple-coordinates-map', 'acfmcL10n', acfmc_l10n_strings());

        // load scripts and styles
        wp_enqueue_style('acf-multiple-coordinates-field');
        wp_enqueue_script('googlemaps-api');
        wp_enqueue_script('acf-multiple-coordinates-map');
    }

    /*
     * create_field
     *
     * Create the HTML interface for the field.
     *
     * @param   $field - an array containing the fields data
     */
    public function create_field($field)
    {
        // load default data into the field
        $field = array_merge($this->defaults, $field);

        $lat = $field['center']['lat'];
        $lng = $field['center']['lng'];
        $zoom = $field['zoom'];

        // generate a unique id and put it as suffix to the fields name
        // the field name includes [ and ] so we just replace them with
        // more proper values for use in an html attribute
        $ptrns = array('/\[/', '/\]/');
        $rplcs = array('_', '');
        $uid = preg_replace($ptrns, $rplcs, $field['name']);

        // if field value is not a valid json string, create a new one with
        // the default values
        if (!json_decode($field['value'])) {
            $values = json_encode(	array(	'zoom' => 11, 
											'coords' => array(
											array(	'lat' => $lat,
													'lng' => $lng))));
        }
        else {
            $values = $field['value'];
        }

        // Shape, style, colour and the marker switch are stored in the same
        // value as the points, and every one of them is optional — a value
        // without them draws no shape at all.
        $decoded = json_decode($values, true);
        acfmc_render_field_markup(array(
            'uid'     => $uid,
            'name'    => $field['name'],
            'values'  => $values,
            'shape'   => (is_array($decoded) && isset($decoded['shape'])) ? $decoded['shape'] : 'none',
            'style'   => (is_array($decoded) && isset($decoded['style'])) ? $decoded['style'] : 'sharp',
            'color'   => (is_array($decoded) && isset($decoded['color'])) ? $decoded['color'] : ACFMC_DEFAULT_COLOR,
            'markers' => !(is_array($decoded) && isset($decoded['markers']) && !$decoded['markers']),
        ));
    }

    /*
     * format_value_for_api
     *
     * The data in the API is json encoded so we json decode
     * it as an array before returning it so its easily usable
     *
     * we also remove the zoom attribute since its only of importance
     * in the backend
     *
     * @param   $value - the value loaded from the database
     * @param   $post_id - the id of the loaded post
     * @param   $field - the field array holding all the field options
     */
    public function format_value_for_api($value, $post_id, $field)
    {
        $value_arr = json_decode($value, true);
        //unset($value_arr['zoom']);
        return $value_arr;
    }

}

new acfmc_field_multiple_coordinates_v4();