<?php

defined('ABSPATH') or exit;

/**
 * Class MC4WP_Ninja_Forms_Integration
 *
 * @ignore
 */
class MC4WP_Gravity_Forms_Integration extends MC4WP_Integration
{

    /**
     * @var string
     */
    public $name = "Gravity Forms";

    /**
     * @var string
     */
    public $description = "Subscribe visitors from your Gravity Forms forms.";


    /**
     * Add hooks
     */
    public function add_hooks()
    {
        add_action('gform_field_standard_settings', array( $this, 'settings_fields' ), 10, 2);
        add_action('gform_editor_js', array( $this, 'editor_js' ));
        add_action('gform_after_submission', array( $this, 'after_submission' ), 10, 2);
    }

    public function after_submission($submission, $form)
    {
        $subscribe = false;
        $email_address = '';
        $mailchimp_list_id = '';
        $double_optin = $this->options['double_optin'];

        // find email field & checkbox value
        foreach ($form['fields'] as $field) {
            if ($field->type === 'email' && empty($email_address) && ! empty($submission[ $field->id ])) {
                $email_address = $submission[ $field->id ];
            }

            if ($field->type === 'mailchimp' && ! empty($submission[ $field->id ])) {
                $subscribe = true;
                $mailchimp_list_id = $field->mailchimp_list;

                if (isset($field->mailchimp_double_optin)) {
                    $double_optin = $field->mailchimp_double_optin;
                }
            }
        }

        if (! $subscribe || empty($email_address)) {
            return;
        }

        // override integration settings with field options
        $orig_options = $this->options;
        $this->options['lists'] = array( $mailchimp_list_id );
        $this->options['double_optin'] = $double_optin;

        // perform the sign-up
        $this->subscribe(array( 'EMAIL' => $email_address ), $submission['form_id']);

        // revert back to original options in case request lives on
        $this->options = $orig_options;
    }

    public function editor_js()
    {
        ?>
        <script type="text/javascript">
            /*
            * When the field settings are initialized, populate
            * the custom field setting.
            */
            jQuery(document).on('gform_load_field_settings', function(ev, field) {
                jQuery('#field_mailchimp_list').val(field.mailchimp_list || '');
                jQuery('#field_mailchimp_double_optin').val(field.mailchimp_double_optin || "1");
            });
        </script>
        <?php
    }

    public function settings_fields($pos, $form_id)
    {
        if ($pos !== 0) {
            return;
        }
        
        $mailchimp = new MC4WP_MailChimp();
        $lists = $mailchimp->get_cached_lists(); ?>
        <li class="mailchimp_list_setting field_setting">
            <label for="field_mailchimp_list" class="section_label">
                <?php esc_html_e('Mailchimp list', 'mailchimp-for-wp'); ?>
            </label>
            <select id="field_mailchimp_list" onchange="SetFieldProperty('mailchimp_list', this.value)">
                <option value="" disabled><?php _e('Select a Mailchimp list', 'mailchimp-for-wp'); ?></option>
                <?php foreach ($lists as $list) {
            echo sprintf('<option value="%s">%s</option>', $list->id, $list->name);
        } ?>
            </select>
        </li>
        <li class="mailchimp_double_optin field_setting">
            <label for="field_mailchimp_double_optin" class="section_label">
                <?php esc_html_e('Double opt-in?', 'mailchimp-for-wp'); ?>
            </label>
            <select id="field_mailchimp_double_optin" onchange="SetFieldProperty('mailchimp_double_optin', this.value)">
                <option value="1"><?php echo __('Yes'); ?></option>
                <option value="0"><?php echo __('No'); ?></option>
            </select>
        </li>
        <?php
    }

    /**
     * @return bool
     */
    public function is_installed()
    {
        return class_exists('GF_Field') && class_exists('GF_Fields');
    }

    /**
     * @since 3.0
     * @return array
     */
    public function get_ui_elements()
    {
        return array();
    }

    /**
     * @param int $form_id
     * @return string
     */
    public function get_object_link($form_id)
    {
        return '<a href="'. admin_url(sprintf('admin.php?page=gf_edit_forms&id=%d', $form_id)) . '">Gravity Forms</a>';
    }
}
