<?php

/**
 *	Plugin Name: Chatlio Live Chat for Slack
 *	Plugin URI: https://chatlio.com/app/#/settings/install
 *	Description: Chatlio
 *	Version: 1.3.0
 *	Author: Chatlio
 *	Author URI: https://chatlio.com/?ref=wordpress
 *	Requires at least: 5.9
 *	Requires PHP: 8.3
 **/

/**
 * Security Check
 *
 * @since 1.0
 **/

defined("ABSPATH") || die("Direct access to this file is forbidden.");

/**
 * Chatlio class
 *
 * @since 1.0
 **/

class Chatlio
{
    /**
     * Starter defines and vars for use later
     *
     * @since 1.0
     **/

    // Holds option data.
    private $option_name = "pwl_chatlio_options";
    private $options = [];
    private $option_defaults;

    // DB version, for schema upgrades.
    private $db_version = 1;

    // Instance
    public static $instance;

    /**
     * Constuct
     * Fires when class is constructed, adds init hook
     *
     * @since 1.0
     **/

    public function __construct()
    {
        // Allow this instance to be called from outside the class
        self::$instance = $this;

        // Add Chatlio script to head
        add_action("wp_head", [$this, "wp_head"]);

        // Add Chatlio widget element to footer
        add_action("wp_footer", [$this, "wp_footer"]);

        // Add admin init hook
        add_action("admin_init", [$this, "admin_init"]);

        // Add admin panel
        add_action("admin_menu", [$this, "admin_menu"]);

        // Setting plugin defaults here
        $this->option_defaults = [
            "widget_id" => "",
            "db_version" => $this->db_version,
        ];
    }

    /**
     * Frontend wp_head Callback - loads Chatlio script
     *
     * @since 1.0
     * @since 1.2.0 Updated to new embed code
     **/

    public function wp_head()
    {
        // Get options
        $this->options = wp_parse_args(
            get_option("chatlio_options"),
            $this->option_defaults,
        );

        if (!empty($this->options["widget_id"])) {
            echo '<script src="https://js.chatlio.com/widget.js" async></script>';
        }
    }

    /**
     * Frontend wp_footer Callback - outputs Chatlio widget element
     *
     * @since 1.2.0
     **/

    public function wp_footer()
    {
        // Get options
        $this->options = wp_parse_args(
            get_option("chatlio_options"),
            $this->option_defaults,
        );

        if (!empty($this->options["widget_id"])) {
            $widget_id = esc_attr($this->options["widget_id"]);
            echo '<chatlio-widget widgetid="' .
                $widget_id .
                '"></chatlio-widget>';
        }
    }

    /**
     * Admin init Callback
     *
     * @since 1.0
     **/

    public function admin_init()
    {
        // Fetch and set up options.
        $this->options = wp_parse_args(
            get_option("chatlio_options"),
            $this->option_defaults,
        );

        // Register Settings
        $this->register_settings();
    }

    /**
     * Admin Menu Callback
     *
     * @since 1.0
     **/

    public function admin_menu()
    {
        // Add settings page on Tools
        add_management_page(
            __("Chatlio", "chatlio"),
            __("Chatlio", "chatlio"),
            "manage_options",
            "chatlio-settings",
            [$this, "chatlio_settings"],
        );
    }

    /**
     * Register Admin Settings
     *
     * @since 1.0
     **/

    public function register_settings()
    {
        register_setting("chatlio", "chatlio_options", [
            $this,
            "chatlio_sanitize",
        ]);

        // The main section
        add_settings_section(
            "chatlio_settings_section",
            "Chatlio Settings",
            [$this, "chatlio_settings_callback"],
            "chatlio-settings",
        );

        // The Fields
        add_settings_field(
            "widget_id",
            "Widget ID",
            [$this, "widget_id_callback"],
            "chatlio-settings",
            "chatlio_settings_section",
        );
    }

    /**
     * Settings Callback
     *
     * @since 1.0
     **/

    public function chatlio_settings_callback()
    {
        echo "<p>" .
            sprintf(
                __(
                    'To customize the behavior or appearance of your Chatlio widget, visit the <a href="%s" target="_blank">Chatlio Dashboard</a>. For help with this plugin, see our <a href="%s" target="_blank">WordPress documentation</a>.',
                    "chatlio",
                ),
                "https://chatlio.com/app/#/",
                "https://chatlio.com/docs/wordpress/",
            ) .
            "</p>";
    }

    /**
     * Widget ID Statuses Callback
     *
     * @since 1.0
     **/

    public function widget_id_callback()
    {
        ?>

		<input type="text" id="chatlio_options[widget_id]" name="chatlio_options[widget_id]" value="<?php echo esc_attr(
      $this->options["widget_id"],
  ); ?>" >
		<label for="chatlio_options[widget_id]"><?php _e(
      "Add your Widget ID to enable Chatlio",
      "chatlio",
  ); ?></label>

	<?php
    }

    /**
     * Call settings page
     *
     * @since 1.0
     **/

    public function chatlio_settings()
    {
        ?>

		<div class="wrap">

			<h2><?php _e("Chatlio", "chatlio"); ?></h2>

			<form action="options.php" method="POST">
				<?php
    settings_fields("chatlio");
    do_settings_sections("chatlio-settings");
    submit_button();?>
			</form>

		</div>

	<?php
    }

    /**
     * Options sanitization and validation
     *
     * @param $input the input to be sanitized
     * @since 1.0
     **/
    public function chatlio_sanitize($input)
    {
        $options = $this->options;

        $input["db_version"] = $this->db_version;

        foreach ($options as $key => $value) {
            $output[$key] = sanitize_text_field($input[$key]);
        }

        return $output;
    }

    /**
     * Add settings link on plugin
     *
     * @since 1.0
     **/

    public function add_settings_link($links, $file)
    {
        if (plugin_basename(__FILE__) == $file) {
            $settings_link =
                '<a href="' .
                admin_url("tools.php?page=chatlio-settings") .
                '">' .
                __("Settings", "chatlio") .
                "</a>";
            array_unshift($links, $settings_link);
        }

        return $links;
    }
}

new Chatlio();