class Tribe__Tickets_Plus__Commerce__Loader {

	public $nag_data = array();

	/**
	 * @var Tribe__Tickets__Tickets[]
	 */
	protected $commerce_providers = array();

	public function __construct() {
		add_action( 'admin_notices', array( $this, 'maybe_nagit' ) );

		$this->woocommerce();
		$this->easy_digital_downloads();
	}

	/**
	 * Allows us to add only one action to the `admin_notices`
	 *
	 * @return void
	 */
	public function maybe_nagit() {
		if ( ! is_array( $this->nag_data ) ) {
			return;
		}

		foreach ( $this->nag_data as $plugin => $data ) {
			call_user_func_array( array( $this, 'nag' ), $data );
		}
	}

	/**
	 * Check if WooCommerce is installed and active.
	 * If it is and the version is compatible, load our WooCommerce connector.
	 */
	public function woocommerce() {
		// Check if the legacy plugin exists
		if ( class_exists( 'Tribe__Events__Tickets__Woo__Main' ) ) {
			$args           = array(
				'action'        => 'deactivate',
				'plugin'        => $this->get_plugin_file( 'The Events Calendar: WooCommerce Tickets' ),
				'plugin_status' => 'all',
				'paged'         => 1,
				's'             => '',
			);
			$deactivate_url = wp_nonce_url( add_query_arg( $args, 'plugins.php' ), 'deactivate-plugin_' . $args['plugin'] );

			$this->nag_data['woocommerce'] = array(
				__( 'WooCommerce', 'event-tickets-plus' ),
				$deactivate_url,
				'legacy-plugin',
			);

			return;
		}

		if ( ! $this->is_woocommerce_active() ) {
			return;
		}

		global $woocommerce;
		// Here we will check for Comptibility problems
		if ( ! version_compare( $woocommerce->version, Tribe__Tickets_Plus__Commerce__WooCommerce__Main::REQUIRED_WC_VERSION, '>=' ) ) {
			$this->nag_data['woocommerce'] = array(
				__( 'WooCommerce', 'event-tickets-plus' ),
				add_query_arg( array(
					'tab'       => 'plugin-information',
					'plugin'    => 'woocommerce',
					'TB_iframe' => 'true',
				), admin_url( 'plugin-install.php' ) ),
				'incompatible',
			);

			return;
		}

		$this->commerce_providers['woocommerce'] = tribe( 'tickets-plus.commerce.woo' );
	}

	/**
	 * Check if EDD is installed and active.
	 * If it is and the version is compatible, load our EDD connector.
	 */
	public function easy_digital_downloads() {
		// Check if the legacy plugin exists
		if ( class_exists( 'Tribe__Events__Tickets__EDD__Main' ) ) {
			$args           = array(
				'action'        => 'deactivate',
				'plugin'        => $this->get_plugin_file( 'The Events Calendar: EDD Tickets' ),
				'plugin_status' => 'all',
				'paged'         => 1,
				's'             => '',
			);
			$deactivate_url = wp_nonce_url( add_query_arg( $args, 'plugins.php' ), 'deactivate-plugin_' . $args['plugin'] );

			$this->nag_data['easy_digital_downloads'] = array(
				__( 'Easy Digital Downloads', 'event-tickets-plus' ),
				$deactivate_url,
				'legacy-plugin',
			);

			return;
		}

		if ( ! $this->is_edd_active() ) {
			return;
		}

		// Here we will check for Comptibility problems
		if ( ! version_compare( EDD_VERSION, Tribe__Tickets_Plus__Commerce__EDD__Main::REQUIRED_EDD_VERSION, '>=' ) ) {
			$this->nag_data['easy_digital_downloads'] = array(
				__( 'Easy Digital Downloads', 'event-tickets-plus' ),
				add_query_arg( array(
					'tab'       => 'plugin-information',
					'plugin'    => 'easy-digital-downloads',
					'TB_iframe' => 'true',
				), admin_url( 'plugin-install.php' ) ),
				'incompatible',
			);

			return;
		}

		$this->commerce_providers['easy_digital_downloads'] = tribe( 'tickets-plus.commerce.edd' );
	}

	/**
	 * We need a way to fetch the file so that we can provide a Deactivate the link
	 *
	 * @param  string $plugin_name The plugin name as it's on the legacy Plugin
	 *
	 * @return string|null
	 */
	protected function get_plugin_file( $plugin_name ) {
		if ( ! function_exists( 'get_plugins' ) ) {
			require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
		}
		$plugins = get_plugins();
		foreach ( $plugins as $plugin_file => $plugin_info ) {
			if ( $plugin_info['Name'] == $plugin_name ) {
				return $plugin_file;
			}
		}

		return null;
	}

	/**
	 * Whether at least one commerce provider is installed and activated or not.
	 *
	 * @return bool
	 */
	public function has_commerce_providers() {
		return count( $this->commerce_providers ) > 0;
	}

	/**
	 * Prints the HTML for the error we are talking about based on the arguments
	 *
	 * @param  string $plugin Name of the plugin
	 * @param  string $url    The url we are using
	 * @param  string $type   Currently only have 'incompatible' or 'legacy-plugin' types
	 *
	 * @return void
	 */
	protected function nag( $plugin, $url, $type = 'incompatible' ) {

		switch ( $type ) {
			case 'legacy-plugin':
				// Check if the user needs to see the message
				if ( ! current_user_can( 'activate_plugins' ) ) {
					return;
				}

				$nag = __( 'To begin using Tickets Plus with %3$s, you need to <a href="%1$s" title="Deactivate the legacy addon for %2$s">deactivate the old legacy plugin</a>.',
					'event-tickets-plus' );
				break;

			case 'incompatible':
			default:
				// Check if the user needs to see the message
				if ( ! current_user_can( 'activate_plugins' ) ) {
					return;
				}

				$nag = __( 'To begin using Tickets Plus, please install and activate the latest version of <a href="%s" class="thickbox" title="%s">%s</a>.',
					'event-tickets-plus' );
				break;
		}


		echo '<div class="error"><p>';

		printf( $nag, esc_url( $url ), esc_attr( $plugin ), esc_html( $plugin ) );

		echo '</p></div>';
	}

	/**
	 * Whether the WooCommerce plugin is installed and activated.
	 *
	 * @return bool
	 */
	public function is_woocommerce_active() {
		return class_exists( 'Woocommerce' );
	}

	/**
	 * Whether the Easy Digital Downloads plugin is installed and activated.
	 *
	 * @since  4.6
	 *
	 * @return bool
	 */
	public function is_edd_active() {
		return class_exists( 'Easy_Digital_Downloads' ) && defined( 'EDD_VERSION' );
	}
}