<?php

namespace CheckoutWC\StellarWP\Installer;

class Installer
{
    /**
     * The version number for the library.
     *
     * @since 1.1.0
     */
    public const VERSION = '1.1.1';
    /**
     * Asset object.
     *
     * @since 1.1.0
     *
     * @var Assets|null
     */
    protected $assets;
    /**
     * @var ?string
     */
    protected static $hook_prefix;
    /**
     * Is this libary initialized?
     *
     * @since 1.0.0
     *
     * @var Installer|null
     */
    public static $instance;
    /**
     * Registered plugins.
     *
     * @since 1.0.0
     *
     * @var array
     */
    private $plugins = [];
    /**
     * Initialize.
     *
     * @since 1.0.0
     *
     * @return Installer
     */
    public static function init(): Installer
    {
        if (static::$instance) {
            return static::$instance;
        }
        static::$instance = new self();
        return static::$instance;
    }
    /**
     * Gets the asset object.
     *
     * @since 1.1.0
     *
     * @return Assets
     */
    public function assets(): Assets
    {
        if (empty($this->assets)) {
            $this->assets = new Assets();
        }
        return $this->assets;
    }
    /**
     * Helper function for ::init().
     *
     * @since 1.0.0
     *
     * @return Installer
     */
    public static function get(): Installer
    {
        return static::init();
    }
    /**
     * Resets the object back to its origin state.
     *
     * @since 1.0.0
     *
     * @return void
     */
    public static function reset(): void
    {
        static::$instance = null;
    }
    /**
     * Deregisters a plugin for installation / activation.
     *
     * @since 1.0.0
     *
     * @param string $plugin_slug The slug of the plugin.
     *
     * @return bool Whether the plugin was deregistered or not.
     */
    public function deregister_plugin(string $plugin_slug): bool
    {
        if (!isset($this->plugins[$plugin_slug])) {
            return false;
        }
        $hook_prefix = Config::get_hook_prefix();
        remove_action("wp_ajax_stellarwp_installer_{$hook_prefix}_install_plugin_{$plugin_slug}", [$this->plugins[$plugin_slug], 'handle_request']);
        remove_action('deactivated_plugin', [$this->plugins[$plugin_slug], 'clear_install_and_activation_cache']);
        unset($this->plugins[$plugin_slug]);
        /**
         * Fires when a plugin is deregistered.
         *
         * @since 1.0.0
         *
         * @param string $plugin_slug The slug of the plugin.
         */
        do_action("stellarwp/installer/{$hook_prefix}/deregister_plugin", $plugin_slug);
        return true;
    }
    /**
     * Gets the busy class.
     *
     * @since 1.1.0
     *
     * @return string
     */
    public function get_busy_class()
    {
        $hook_prefix = Config::get_hook_prefix();
        /**
         * Filters the busy class.
         *
         * @since 1.1.0
         *
         * @param string $busy_class The busy class.
         */
        return apply_filters("stellarwp/installer/{$hook_prefix}/busy_class", 'is-busy');
    }
    /**
     * Gives the JS object name used for handling JS behaviors.
     *
     * @since 1.0.0
     *
     * @return string
     */
    public function get_js_object_key(): string
    {
        return sanitize_key(Config::get_hook_prefix());
    }
    /**
     * Gives the JS selectors indexed by slug.
     *
     * @since 1.0.0
     *
     * @return array
     */
    public function get_js_selectors(): array
    {
        $plugins = $this->get_registered_plugins();
        $selectors = [];
        foreach ($plugins as $plugin_slug => $plugin) {
            $selectors[$plugin_slug] = '.' . $plugin->get_button()->get_selector();
        }
        return $selectors;
    }
    /**
     * Generates a nonce for the installer.
     *
     * @since 1.0.0
     *
     * @return false|string
     */
    public function get_nonce()
    {
        return wp_create_nonce($this->get_nonce_name());
    }
    /**
     * Gets the nonce name.
     *
     * @since 1.0.0
     *
     * @return string
     */
    public function get_nonce_name(): string
    {
        $hook_prefix = Config::get_hook_prefix();
        /**
         * Filters the nonce name.
         *
         * @since 1.0.0
         *
         * @param string $nonce_name The nonce name.
         */
        return apply_filters("stellarwp/installer/{$hook_prefix}/nonce_name", 'stellarwp_installer_resource_install');
    }
    /**
     * Gets a plugin button.
     *
     * @since 1.0.0
     *
     * @param string      $slug Plugin slug.
     * @param string      $action Action to perform. (install|activate)
     * @param string|null $button_label Button label.
     * @param string|null $redirect_url Redirect URL.
     *
     * @return string|null
     */
    public function get_plugin_button(string $slug, string $action, ?string $button_label = null, ?string $redirect_url = null): ?string
    {
        ob_start();
        $this->render_plugin_button($slug, $action, $button_label, $redirect_url);
        return ob_get_clean();
    }
    /**
     * Gets registered plugins.
     *
     * @since 1.0.0
     *
     * @return array
     */
    public function get_registered_plugins(): array
    {
        return $this->plugins;
    }
    /**
     * Gets registered plugin.
     *
     * @since 1.0.0
     *
     * @return Handler\Plugin|null
     */
    public function get_registered_plugin(string $slug): ?\CheckoutWC\StellarWP\Installer\Handler\Plugin
    {
        if (!isset($this->plugins[$slug])) {
            return null;
        }
        return $this->plugins[$slug];
    }
    /**
     * Returns whether or not a plugin is active.
     *
     * @param string $slug Resource slug.
     *
     * @return bool
     */
    public function is_active(string $slug): bool
    {
        if (isset($this->plugins[$slug])) {
            return $this->plugins[$slug]->is_active();
        }
        if (is_plugin_active($slug)) {
            return true;
        }
        return false;
    }
    /**
     * Returns whether or not a plugin is installed.
     *
     * @param string $slug Resource slug.
     *
     * @return bool
     */
    public function is_installed(string $slug): bool
    {
        if ($this->is_plugin_installed($slug)) {
            return true;
        }
        return false;
    }
    /**
     * Returns whether or not a plugin is installed.
     *
     * @param string $slug Resource slug.
     *
     * @return bool
     */
    public function is_plugin_installed(string $slug): bool
    {
        if (isset($this->plugins[$slug])) {
            return $this->plugins[$slug]->is_installed();
        }
        return false;
    }
    /**
     * Returns whether or not a plugin is registered.
     *
     * @param string $slug Resource slug.
     *
     * @return bool
     */
    public function is_registered(string $slug): bool
    {
        return isset($this->plugins[$slug]);
    }
    /**
     * Registers a plugin for installation / activation.
     *
     * @since 1.0.0
     *
     * @param string $plugin_slug The slug of the plugin.
     * @param string $plugin_name The non-translated name of the plugin.
     * @param string|null $download_url The download URL of the plugin.
     * @param string|null $did_action The action that indicates that a plugin is active.
     *
     * @return void
     */
    public function register_plugin(string $plugin_slug, string $plugin_name, ?string $download_url = null, ?string $did_action = null): void
    {
        // If the plugin is already registered, deregister it first so we don't have duplicate actions.
        if (isset($this->plugins[$plugin_slug])) {
            $this->deregister_plugin($plugin_slug);
        }
        $hook_prefix = Config::get_hook_prefix();
        $js_action = "stellarwp_installer_{$hook_prefix}_install_plugin_{$plugin_slug}";
        $handler = new Handler\Plugin($plugin_name, $plugin_slug, $download_url, $did_action, $js_action);
        $this->plugins[$plugin_slug] = $handler;
        add_action("wp_ajax_{$js_action}", [$handler, 'handle_request']);
        add_action('deactivated_plugin', [$handler, 'clear_install_and_activation_cache']);
        /**
         * Fires when a plugin is registered.
         *
         * @since 1.0.0
         *
         * @param string $plugin_slug The slug of the plugin.
         * @param string $plugin_name The name of the plugin.
         * @param string|null $download_url The download URL of the plugin.
         */
        do_action("stellarwp/installer/{$hook_prefix}/register_plugin", $plugin_slug, $plugin_name, $download_url);
    }
    /**
     * Renders a plugin button.
     *
     * @since 1.0.0
     *
     * @param string      $slug Plugin slug.
     * @param string      $action Action to perform. (install|activate)
     * @param string|null $button_label Button label.
     * @param string|null $redirect_url Redirect URL.
     *
     * @return void
     */
    public function render_plugin_button(string $slug, string $action, ?string $button_label = null, ?string $redirect_url = null): void
    {
        if (!isset($this->plugins[$slug])) {
            return;
        }
        $this->plugins[$slug]->get_button()->render($action, $button_label, $redirect_url);
    }
}