<?php
namespace Academy\Ajax;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

use Academy\Classes\AbstractAjaxHandler;
use Academy\Classes\Sanitizer;

class PluginDownloader extends AbstractAjaxHandler {
	public function __construct() {
		$this->actions = array(
			'check_installed_plugins' => [
				'callback' => [ $this, 'check_installed_plugins' ],
				'capability' => 'manage_options',
			],
			'install_plugins' => [
				'callback' => [ $this, 'install_plugins' ],
				'capability' => 'manage_options',
			],
			'install_integration' => [
				'callback' => [ $this, 'install_integration' ],
				'capability' => 'manage_options',
			],
		);
	}

	/**
	 * One-click install/activate for an "Extensions & Integrations" catalog
	 * entry. Key-gated — the package URL is resolved server-side from the
	 * catalog, never taken from the client.
	 *
	 * @param array $payload_data
	 */
	public function install_integration( $payload_data ) {
		$payload = Sanitizer::sanitize_payload( [ 'key' => 'string' ], $payload_data );
		$key     = isset( $payload['key'] ) ? $payload['key'] : '';

		$result = \Academy\Admin\Integrations::install_and_activate( $key );

		if ( is_wp_error( $result ) ) {
			$data = $result->get_error_data();
			wp_send_json_error( [
				'message' => $result->get_error_message(),
				'status'  => isset( $data['status'] ) ? $data['status'] : 400,
			] );
		}

		wp_send_json_success( $result );
	}

	public function check_installed_plugins( $payload_data ) {
		$payload = Sanitizer::sanitize_payload( [
			'plugin_slug' => 'string',
		], $payload_data );

		$plugin_slug = isset( $payload['plugin_slug'] ) ? $payload['plugin_slug'] : '';

		if ( empty( $plugin_slug ) ) {
			wp_send_json_error( [
				'message' => __( 'Invalid plugin slug.', 'academy' ),
			] );
		}

		if ( ! current_user_can( 'install_plugins' ) || ! current_user_can( 'activate_plugins' ) ) {
			wp_send_json_error( [
				'message' => __( 'You do not have permission to install or activate plugins.', 'academy' ),
			] );
		}

		$plugin_file = $plugin_slug . '/' . $plugin_slug . '.php';

		if ( \Academy\Helper::is_plugin_active( $plugin_file ) ) {
			wp_send_json_success( [
				'message'      => __( 'Plugin is already active.', 'academy' ),
				'is_installed' => true,
				'is_active'    => true,
			] );
		}

		if ( $this->is_plugin_installed( $plugin_file ) ) {
			wp_send_json_success( [
				'message'      => __( 'Plugin is already installed.', 'academy' ),
				'is_installed' => true,
				'is_active'    => false,
			] );
		}

		wp_send_json_error( [
			'message'      => __( 'Plugin is not installed.', 'academy' ),
			'is_installed' => false,
		] );
	}

	public function install_plugins( $payload_data ) {
		$payload = Sanitizer::sanitize_payload( [
			'plugin_slug' => 'string',
		], $payload_data );
		$plugin_slug = isset( $payload['plugin_slug'] ) ? $payload['plugin_slug'] : '';

		if ( empty( $plugin_slug ) ) {
			wp_send_json_error( [
				'message' => __( 'Invalid plugin slug.', 'academy' ),
			] );
		}

		if ( ! current_user_can( 'install_plugins' ) || ! current_user_can( 'activate_plugins' ) ) {
			wp_send_json_error( [
				'message' => __( 'You do not have permission to install or activate plugins.', 'academy' ),
			] );
		}

		$plugin_file = $plugin_slug . '/' . $plugin_slug . '.php';

		if ( ! $this->is_plugin_installed( $plugin_file ) ) {
			include_once ABSPATH . 'wp-admin/includes/plugin-install.php';
			include_once ABSPATH . 'wp-admin/includes/file.php';
			include_once ABSPATH . 'wp-admin/includes/misc.php';
			include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
			$api = plugins_api( 'plugin_information', [
				'slug'   => $plugin_slug,
				'fields' => [ 'sections' => false ],
			] );

			if ( is_wp_error( $api ) || empty( $api->download_link ) ) {
				wp_send_json_error( [
					'message' => __( 'Plugin download failed or plugin not found.', 'academy' ),
				] );
			}

			$upgrader = new \Plugin_Upgrader( new \Automatic_Upgrader_Skin() );
			$install_result = $upgrader->install( $api->download_link );

			if ( ! $install_result || ! $this->is_plugin_installed( $plugin_file, true ) ) {
				wp_send_json_error( [
					'message' => __( 'Plugin installation failed.', 'academy' ),
				] );
			}
		}//end if

		$activation_result = activate_plugin( $plugin_file, '', false, true );

		if ( is_wp_error( $activation_result ) ) {
			wp_send_json_error( [
				'message' => $activation_result->get_error_message(),
				'status'  => 400,
			] );
		}

		wp_send_json_success( [
			'message'      => __( 'Plugin successfully installed and activated.', 'academy' ),
			'is_installed' => true,
		] );
	}

	private function is_plugin_installed( $plugin_file, $refresh = false ) {
		if ( ! function_exists( 'get_plugins' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}
		if ( $refresh ) {
			wp_clean_plugins_cache( false );
		}
		return array_key_exists( $plugin_file, get_plugins() );
	}
}