<?php
/**
 * Flow
 *
 * @package cartflows
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * Analytics reports class.
 */
class Cartflows_Pro_Analytics_Reports {

	/**
	 * Member Variable
	 *
	 * @var object instance
	 */
	private static $instance;

	/**
	 * Flow orders
	 *
	 * @var array flow_orders
	 */
	private static $flow_orders = array();

	/**
	 * Flow gross sell
	 *
	 * @var int flow_gross
	 */
	private static $flow_gross = 0;

	/**
	 * Flow visits
	 *
	 * @var array flow_visits
	 */
	private static $flow_visits = array();

	/**
	 * Steps data
	 *
	 * @var array step_data
	 */
	private static $step_data = array();

	/**
	 * Earnings for flow
	 *
	 * @var array flow_earnings
	 */
	private static $flow_earnings = array();

	/**
	 * Report interval
	 *
	 * @var int report_interval
	 */
	private static $report_interval = 30;

	/**
	 *  Initiator
	 */
	public static function get_instance() {
		if ( ! isset( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor function that initializes required actions and hooks
	 */
	public function __construct() {

		$this->load_analytics();
	}

	/**
	 *
	 * Analytics
	 *
	 * @return void
	 */
	public function load_analytics() {

		add_action( 'cartflows_add_flow_metabox', array( $this, 'add_analytics_metabox' ) );

		$flow_id = isset( $_GET['post'] ) ? intval( $_GET['post'] ) : 0;

		$analytics = wcf()->options->get_flow_meta_value( $flow_id, 'wcf-enable-analytics' );

		if ( 'no' === $analytics ) {
			return;
		}

		add_action( 'admin_enqueue_scripts', array( $this, 'load_analytics_scripts' ), 20 );
		add_action( 'wp_ajax_cartflows_set_visit_data', array( $this, 'set_visits_data' ) );
		add_action( 'admin_footer', array( $this, 'render_analytics_stat' ) );
		add_action( 'wp_ajax_wcf_reset_flow_analytics', array( $this, 'reset_flow_analytics' ) );
		add_filter( 'cartflows_admin_js_localize', array( $this, 'add_localize_vars_for_analytics' ), 10, 1 );
	}

	/**
	 *
	 * Localize variables for analytics.
	 *
	 * @param array $localize vars.
	 */
	public function add_localize_vars_for_analytics( $localize ) {
		$localize['wcf_reset_analytics_nonce']   = wp_create_nonce( 'wcf_reset_flow_analytics' );
		$localize['confirm_msg_for_analytics']   = __( 'Are you sure you want to reset the analytics for this flow?', 'cartflows-pro' );
		$localize['succesful_msg_for_analytics'] = __( 'Flow analytics data has been reset successfully.', 'cartflows-pro' );

		$flow_id = isset( $_GET['post'] ) ? intval( $_GET['post'] ) : 0;

		$localize['flow_id'] = $flow_id;

		return $localize;
	}

	/**
	 *
	 * Reset ANalytics.
	 *
	 * @return void
	 */
	public function reset_flow_analytics() {

		check_ajax_referer( 'wcf_reset_flow_analytics', 'security' );
		global $wpdb;
		$visit_db       = $wpdb->prefix . CARTFLOWS_PRO_VISITS_TABLE;
		$visits_meta_db = $wpdb->prefix . CARTFLOWS_PRO_VISITS_META_TABLE;
		$flow_id        = isset( $_POST['flow_id'] ) ? intval( $_POST['flow_id'] ) : 0;

		if ( 0 !== $flow_id ) {
			$get_steps = wcf()->flow->get_steps( $flow_id );
			$step_ids  = implode( ',', wp_list_pluck( $get_steps, 'id' ) );

			$wpdb->query( "DELETE FROM {$visit_db} WHERE step_id IN(" . $step_ids . ')' ); //phpcs:ignore

			$reset_date = current_time( 'Y-m-d H:i:s' );

			update_post_meta( $flow_id, 'wcf-analytics-reset-date', $reset_date );

			wp_send_json_success( true );
		}
		wp_send_json_error( false );
	}
	/**
	 *
	 * Add Analytics Metabox
	 *
	 * @return void
	 */
	public function add_analytics_metabox() {
		add_meta_box(
			'wcf-analytics-settings',                    // Id.
			__( 'Analytics', 'cartflows-pro' ), // Title.
			array( $this, 'analytics_metabox_markup' ),      // Callback.
			CARTFLOWS_FLOW_POST_TYPE,               // Post_type.
			'side',                               // Context.
			'high'                                  // Priority.
		);
	}

	/**
	 * Analytics Metabox Markup
	 *
	 * @param array $post post data.
	 * @return void
	 */
	public function analytics_metabox_markup( $post ) {
		?>
		<div class="wcf-flow-sandbox-table wcf-general-metabox-wrap widefat">
			<div class="wcf-flow-enable-analytics">
				<?php

					$meta_intance = Cartflows_Flow_Meta::get_instance();
					$meta_data    = $meta_intance->get_current_post_meta( $post->ID );
				foreach ( $meta_data as $key => $value ) {
					$options[ $key ] = $meta_data[ $key ]['default'];
				}

					echo wcf()->meta->get_checkbox_field(
						array(
							'name'  => 'wcf-enable-analytics',
							'value' => $options['wcf-enable-analytics'],
							'after' => esc_html__( 'Enable Flow Analytics', 'cartflows-pro' ),
						)
					);
				?>
			</div>
			<div class="wcf-flow-sandbox-table-container">
				<?php

					echo wcf()->meta->get_description_field(
						array(
							'name'    => 'wcf-analytics-note',
							'content' => esc_html__( 'Analytics offers data that helps you understand how your flows are performing.', 'cartflows-pro' ),
						)
					);
				?>
					<div class="button-wrap">
					<?php
						$this->setup_analytics_button();
						$this->reset_analytics_button();
					?>
					</div>
			</div>
		</div>
		<?php
	}

	/**
	 * Render analytics display button beside title.
	 */
	public function setup_analytics_button() {

		if ( ! Cartflows_Admin::is_flow_edit_admin() ) {
			return;
		}

		$reports_btn_markup          = '<style>.wrap{ position:relative;}</style>';
		$reports_btn_markup         .= "<div class='wcf-reports-button-wrap'>";
			$reports_btn_markup     .= "<button class='wcf-trigger-reports-popup button button-secondary'>";
				$reports_btn_markup .= esc_html__( 'View Analytics', 'cartflows-pro' );
			$reports_btn_markup     .= '</button>';
		$reports_btn_markup         .= '</div>';

		echo $reports_btn_markup;

	}

	/**
	 *
	 * Add Analytics reset button.
	 *
	 * @return void
	 */
	public function reset_analytics_button() {

		if ( ! Cartflows_Admin::is_flow_edit_admin() ) {
			return;
		}

		$reset_btn_markup          = '<style>.wrap{ position:relative;}</style>';
		$reset_btn_markup         .= "<div class='wcf-reset-button-wrap'>";
			$reset_btn_markup     .= "<button class='wcf-reset-analytics button button-secondary' id='wcf-reset-analytics-button' data-process='" . esc_html__( 'Resetting', 'cartflows-pro' ) . "'>";
				$reset_btn_markup .= esc_html__( 'Reset Analytics', 'cartflows-pro' );
			$reset_btn_markup     .= '</button>';
		$reset_btn_markup         .= '</div>';

		echo $reset_btn_markup;

	}

	/**
	 * Set visits data for later use in analytics.
	 */
	public function set_visits_data() {

		$flow_id  = isset( $_POST['flow_id'] ) ? intval( $_POST['flow_id'] ) : 0;
		$earning  = $this->get_earnings( $flow_id );
		$visits   = $this->fetch_visits( $flow_id );
		$all_data = $this->visits_map( $flow_id, $visits, $earning );

		$response = array(
			'revenue'   => $earning,
			'all_steps' => $all_data,
		);

		wp_send_json_success( $response );
	}

	/**
	 * Display analytics stat table.
	 */
	public function render_analytics_stat() {

		if ( ! Cartflows_Admin::is_flow_edit_admin() ) {
			return;
		}

		$currency_symbol = '';

		if ( wcf_pro()->is_woo_active ) {

			if ( function_exists( 'get_woocommerce_currency_symbol' ) ) {
				$currency_symbol = get_woocommerce_currency_symbol();
			}
		}

		include CARTFLOWS_TRACKING_DIR . '/view/analytics-template.php';

		include CARTFLOWS_TRACKING_DIR . '/view/analytics-popup.php';
	}

	/**
	 * Visits map.
	 *
	 * @param int   $flow_id flow id.
	 * @param array $visits visits data.
	 * @param array $earning earning data.
	 * @return array
	 */
	public function visits_map( $flow_id, $visits, $earning ) {

		$visits_map = array();

		foreach ( $visits as $v_in => $v_data ) {

			$step_id                = $v_data->step_id;
			$v_data_array           = (array) $v_data;
			$visits_map[ $step_id ] = $v_data_array;
			$step_type              = wcf()->utils->get_step_type( $step_id );

			$visits_map[ $step_id ]['revenue']         = 0;
			$visits_map[ $step_id ]['title']           = get_the_title( $step_id );
			$visits_map[ $step_id ]['note']            = get_post_meta( $step_id, 'wcf-step-note', true );
			$visits_map[ $step_id ]['conversion_rate'] = 0;

			// Set conversion rate.
			$conversions  = intval( $v_data_array['conversions'] );
			$total_visits = intval( $v_data_array['total_visits'] );

			if ( $total_visits > 0 ) {

				$conversion_rate = $conversions / intval( $v_data_array['total_visits'] ) * 100;

				$visits_map[ $step_id ]['conversion_rate'] = number_format( (float) $conversion_rate, 2, '.', '' );
			}

			switch ( $step_type ) {

				case 'checkout':
					$visits_map[ $step_id ]['revenue'] = 0;

					if ( isset( $earning['checkout'][ $step_id ] ) ) {
						$visits_map[ $step_id ]['revenue'] = $earning['checkout'][ $step_id ];