<?php
/**
 * @package Restrict User Access
 * @author Joachim Jensen <joachim@dev.institute>
 * @license GPLv3
 * @copyright 2020 by Joachim Jensen
 */

defined('ABSPATH') || exit;

final class RUA_Settings_Page
{

    /**
     * Settings slug
     * @var string
     */
    private $slug = "wprua-settings";

    /**
     * Settings option group
     * @var string
     */
    private $option_group = 'rua-group-main';

    /**
     * Settings prefix
     * @var string
     */
    private $prefix = "rua-";

    /**
     * Settings
     * @var array
     */
    private $settings;

    public function __construct()
    {
        add_action(
            "admin_init",
            array($this, "init_settings"),
            99
        );
        add_action(
            "admin_menu",
            array($this, "add_settings_menu"),
            99
        );
    }

    public function init_settings()
    {
        $this->settings = array(
            "general" => array(
                "name"     => "general",
                "title"    => __("General", 'restrict-user-access'),
                "callback" => "",
                "fields"   => array()
            )
        );

        $this->settings["general"]["fields"][] = array(
            "name"     => "registration-level",
            "title"    => __("New User Default Level", 'restrict-user-access'),
            "callback" => array($this,"dropdown_levels"),
            "args"     => array(
                "label_for"         => $this->prefix."registration-level"
            )
        );

        $default_role = get_option("default_role");
        $roles = get_editable_roles();
        $this->settings["general"]["fields"][] = array(
            "name"     => "registration-role",
            "title"    => __("New User Default Role"),
            "callback" => array($this,"setting_moved"),
            "args"     => array(
                "option" => $roles[$default_role]["name"],
                "title"  => __("General Settings"),
                "url"    =>"options-general.php"
            ),
            "register" => false
        );

        $this->settings["general"]["fields"][] = array(
            "name"     => "registration",
            "title"    => __("Enable Registration", 'restrict-user-access'),
            "callback" => array($this,"setting_moved"),
            "args"     => array(
                "option" => get_option("users_can_register") ? __("Yes") : __("No"),
                "title"  => __("General Settings"),
                "url"    =>"options-general.php"
            ),
            "register" => false
        );

        foreach ($this->settings as $section) {
            add_settings_section(
                $this->prefix.$section["name"],
                $section["title"],
                $section["callback"],
                $this->slug
            );
            foreach ($section["fields"] as $field) {
                add_settings_field(
                    $this->prefix.$field["name"],
                    $field["title"],
                    $field["callback"],
                    $this->slug,
                    $this->prefix.$section["name"],
                    $field["args"]
                );
                if (!isset($field["register"]) || $field["register"]) {
                    register_setting($this->option_group, $this->prefix.$field["name"]);
                }
            }
        }
    }

    /**
     * Add Settings submenu and page
     *
     * @since  0.10
     * @return void
     */
    public function add_settings_menu()
    {
        add_submenu_page(
            RUA_App::BASE_SCREEN,
            __('User Access Settings', 'restrict-user-access'),
            __('Settings'),
            RUA_App::CAPABILITY,
            $this->slug,
            array($this, 'settings_page')
        );
    }

    /**
     * Render levels dropdown
     * Skip synchronized levels
     *
     * @since  0.17
     * @param  array  $args
     * @return void
     */
    public function dropdown_levels($args)
    {
        echo '<select name="'.$this->prefix.'registration-level" id="'.$this->prefix.'registration-level">';
        echo '<option value="0">'.__("-- None --").'</option>';
        foreach (RUA_App::instance()->get_levels() as $id => $level) {
            $synced_role = get_post_meta($level->ID, RUA_App::META_PREFIX.'role', true);
            if ($synced_role === '') {
                echo '<option value="'.$level->ID.'" '.selected($level->ID, get_option($this->prefix."registration-level"), false).'>'.$level->post_title.'</option>';
            }
        }
        echo '</select>';
    }

    /**
     * Render checkbox
     *
     * @since  0.10
     * @param  array  $args
     * @return void
     */
    public function checkbox($args)
    {
        $option = get_option($args["label_for"]);
        echo '<input type="checkbox" name="'.$args["label_for"].'" value="1" '.checked($option, 1, 0).'/>';
    }

    /**
     * Render moved setting
     *
     * @since  0.10
     * @param  array  $args
     * @return void
     */
    public function setting_moved($args)
    {
        echo $args["option"];
        echo '<p class="description">'.sprintf(
            __("Setting can be changed in %s", 'restrict-user-access'),
            '<a href="'.admin_url($args["url"]).'">'.$args["title"].'</a>'
        ).'</p>';
    }

    /**
     * Render settings page
     *
     * @since  0.10
     * @return void
     */
    public function settings_page()
    {
        ?>

		<div class="wrap">
			<h1><?php echo esc_html(get_admin_page_title()); ?></h1>
<?php
            settings_errors(); ?>
			<form method="post" action="options.php">
<?php
            settings_fields($this->option_group);
        do_settings_sections($this->slug);
        submit_button(); ?>
			</form>
		</div>
<?php
    }
}