<?php

namespace WPMailSMTP\Pro\Emails\Logs\Reports;

use WPMailSMTP\Helpers\Helpers;
use WPMailSMTP\WP;
use WPMailSMTP\Admin\Area;
use WPMailSMTP\Admin\ParentPageAbstract;
use WPMailSMTP\Pro\Emails\Logs\Migration;
use WPMailSMTP\Admin\Pages\EmailReportsTab;

/**
 * Email reports admin page.
 *
 * @since 3.0.0
 */
class Admin extends EmailReportsTab {

	/**
	 * Email reports list table object.
	 *
	 * @since 3.0.0
	 *
	 * @var Table
	 */
	private $table;

	/**
	 * Emails stats report object.
	 *
	 * @since 3.0.0
	 *
	 * @var Report
	 */
	private $report;

	/**
	 * Constructor.
	 *
	 * @since 3.0.0
	 *
	 * @param ParentPageAbstract $parent_page Parent page.
	 */
	public function __construct( $parent_page = null ) {

		parent::__construct( $parent_page );

		$this->report = new Report( $this->parse_report_params() );
	}

	/**
	 * Parse report params from request.
	 *
	 * @since 3.0.0
	 *
	 * @return array
	 */
	private function parse_report_params() {

		$params = [];

		// phpcs:disable WordPress.Security.NonceVerification.Recommended
		if ( ! empty( $_REQUEST['order'] ) ) {
			$params['order'] = sanitize_text_field( wp_unslash( $_REQUEST['order'] ) );
		}

		if ( ! empty( $_REQUEST['orderby'] ) ) {
			$params['orderby'] = sanitize_key( $_REQUEST['orderby'] );
		}

		if ( ! empty( $_REQUEST['s'] ) ) {
			$params['search'] = sanitize_text_field( wp_unslash( $_REQUEST['s'] ) );
		}

		$timespan = ! empty( $_REQUEST['timespan'] ) ? sanitize_text_field( wp_unslash( $_REQUEST['timespan'] ) ) : 7;

		if ( $timespan === 'custom' && isset( $_REQUEST['date'] ) ) {
			$date           = array_filter( explode( ' - ', sanitize_text_field( wp_unslash( $_REQUEST['date'] ) ) ) );
			$params['date'] = ! empty( $date ) ? $date : [ current_time( 'Y-m-d' ) ];
		} elseif ( is_numeric( $timespan ) ) {
			$params['date'] = [
				( new \DateTime( 'now', WP::wp_timezone() ) )->modify( "- $timespan days" )->format( 'Y-m-d' ),
				( new \DateTime( 'now', WP::wp_timezone() ) )->modify( '- 1 day' )->format( 'Y-m-d' ),
			];
		}
		// phpcs:enable

		return $params;
	}

	/**
	 * Register hooks.
	 *
	 * @since 3.0.0
	 */
	public function hooks() {

		add_action( 'admin_init', [ $this, 'init_table' ] );
		add_action( 'wp_mail_smtp_admin_area_enqueue_assets', [ $this, 'enqueue_assets' ] );

		// Initialize screen options.
		add_action( 'load-wp-mail-smtp_page_wp-mail-smtp-' . $this->get_parent_slug(), [ $this, 'screen_options' ] );
		add_filter( 'set-screen-option', [ $this, 'set_screen_options' ], 10, 3 );
		add_filter( 'set_screen_option_wp_mail_smtp_report_items_per_page', [ $this, 'set_screen_options' ], 10, 3 );
	}

	/**
	 * Register ajax hooks.
	 *
	 * @since 3.0.0
	 */
	public function ajax() {

		add_action( 'wp_ajax_wp_mail_smtp_email_reports_get_single_stats', [ $this, 'get_single_stats_ajax' ] );
	}

	/**
	 * Initialize stats table.
	 *
	 * @since 3.0.0
	 */
	public function init_table() {

		$this->table = new Table( $this->report );
	}

	/**
	 * Enqueue required JS and CSS.
	 *
	 * @since 3.0.0
	 */
	public function enqueue_assets() {

		$this->enqueue_main_styles();

		if (
			! wp_mail_smtp()->get_pro()->get_logs()->is_enabled() ||
			! wp_mail_smtp()->get_pro()->get_logs()->is_valid_db()
		) {
			return;
		}

		$min = WP::asset_min();

		wp_enqueue_script(
			'wp-mail-smtp-chart',
			wp_mail_smtp()->assets_url . '/js/vendor/chart.min.js',
			[ 'moment' ],
			'2.9.4.1',
			true
		);

		wp_enqueue_style(
			'wp-mail-smtp-admin-flatpickr',
			wp_mail_smtp()->assets_url . '/css/vendor/flatpickr.min.css',
			[],
			'4.6.9'
		);
		wp_enqueue_script(
			'wp-mail-smtp-admin-flatpickr',
			wp_mail_smtp()->assets_url . '/js/vendor/flatpickr.min.js',
			[],
			'4.6.9',
			false
		);

		wp_enqueue_script(
			'wp-mail-smtp-email-reports',
			wp_mail_smtp()->pro->assets_url . "/js/smtp-pro-email-reports{$min}.js",
			[ 'jquery', 'wp-mail-smtp-chart' ],
			WPMS_PLUGIN_VER,
			true
		);

		wp_localize_script(
			'wp-mail-smtp-email-reports',
			'wp_mail_smtp_email_reports',
			[
				'nonce'                    => wp_create_nonce( 'wp-mail-smtp-email-reports-nonce' ),
				'stats_by_date_chart_data' => $this->report->get_stats_by_date_chart_data(),
				'stats_totals'             => $this->report->get_stats_totals(),
				'date_range'               => $this->report->get_date_range(),
				'is_search'                => ! empty( $this->report->get_params( 'search' ) ),
				'texts'                    => [
					'all_emails'         => esc_html__( 'All Emails', 'wp-mail-smtp-pro' ),
					'search_results'     => esc_html__( 'Search Results', 'wp-mail-smtp-pro' ),
					'confirmed_emails'   => esc_html__( 'Confirmed sent emails', 'wp-mail-smtp-pro' ),
					'sent_emails'        => esc_html__( 'Sent emails', 'wp-mail-smtp-pro' ),
					'unconfirmed_emails' => esc_html__( 'Unconfirmed sent emails', 'wp-mail-smtp-pro' ),
					'failed_emails'      => esc_html__( 'Failed emails', 'wp-mail-smtp-pro' ),
					'opened_emails'      => esc_html__( 'Opened emails', 'wp-mail-smtp-pro' ),
					'clicked_links'      => esc_html__( 'Clicked links', 'wp-mail-smtp-pro' ),
				],
				'no_send_confirmations'    => Helpers::mailer_without_send_confirmation(),
				'open_email_tracking'      => wp_mail_smtp()->get_pro()->get_logs()->is_enabled_open_email_tracking(),
				'click_link_tracking'      => wp_mail_smtp()->get_pro()->get_logs()->is_enabled_click_link_tracking(),
			]
		);
	}

	/**
	 * Enqueue main CSS.
	 *
	 * @since 3.0.0
	 */
	public function enqueue_main_styles() {

		wp_enqueue_style(
			'wp-mail-smtp-email-reports',
			wp_mail_smtp()->pro->assets_url . '/css/smtp-pro-email-reports.min.css',
			[],
			WPMS_PLUGIN_VER
		);
	}

	/**
	 * Register the screen options.
	 *
	 * @since 3.0.0
	 */
	public function screen_options() {

		add_screen_option(
			'per_page',
			[
				'label'   => esc_html__( 'Number of items per page:', 'wp-mail-smtp-pro' ),
				'option'  => 'wp_mail_smtp_report_items_per_page',
				'default' => 20,
			]
		);
	}

	/**
	 * Set the screen options.
	 *
	 * @since 3.0.0
	 *
	 * @param bool   $keep   Whether to save or skip saving the screen option value.
	 * @param string $option The option name.
	 * @param int    $value  The number of items to use.
	 *
	 * @return bool|int
	 */
	public function set_screen_options( $keep, $option, $value ) {

		if ( $option === 'wp_mail_smtp_report_items_per_page' ) {
			return (int) $value;
		}

		return $keep;
	}

	/**
	 * Output HTML of the reports page.
	 *
	 * @since 3.0.0
	 */
	public function display() {

		if ( ! wp_mail_smtp()->get_pro()->get_logs()->is_enabled() ) {
			$this->display_reports_disabled();
		} elseif ( ! wp_mail_smtp()->get_pro()->get_logs()->is_valid_db() ) {
			$this->display_reports_not_installed();
		} else {
			$this->display_reports();
		}
	}

	/**
	 * Output HTML of the email reports.
	 *
	 * @since 3.0.0
	 */
	private function display_reports() {

		?>
		<form action="<?php echo esc_url( $this->get_link() ); ?>" method="get">
			<input type="hidden" name="page" value="<?php echo esc_attr( Area::SLUG . '-' . $this->get_parent_page()->get_slug() ); ?>"/>

			<div class="wp-mail-smtp-email-reports">
				<div class="wp-mail-smtp-email-reports__header">
					<h2 class="wp-mail-smtp-email-reports__title">
						<?php if ( ! empty( $this->report->get_params( 'search' ) ) ) : ?>
							<?php esc_html_e( 'Search Results', 'wp-mail-smtp-pro' ); ?>
						<?php else : ?>
							<?php esc_html_e( 'All Emails', 'wp-mail-smtp-pro' ); ?>
						<?php endif; ?>
					</h2>

					<div class="wp-mail-smtp-email-reports__stats">
						<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--total">
							<i class="dashicons dashicons-email"></i> <span></span>
							<?php esc_html_e( 'total', 'wp-mail-smtp-pro' ); ?>
						</div>
						<?php if ( Helpers::mailer_without_send_confirmation() ) : ?>
							<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--sent">
								<i></i> <span></span> <?php esc_html_e( 'sent', 'wp-mail-smtp-pro' ); ?>
							</div>
						<?php else : ?>
							<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--confirmed">
								<i></i> <span></span> <?php esc_html_e( 'confirmed', 'wp-mail-smtp-pro' ); ?>
							</div>
							<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--unconfirmed">
								<i></i> <span></span> <?php esc_html_e( 'unconfirmed', 'wp-mail-smtp-pro' ); ?>
							</div>
						<?php endif; ?>
						<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--unsent">
							<i></i> <span></span> <?php esc_html_e( 'failed', 'wp-mail-smtp-pro' ); ?>
						</div>
						<?php if ( wp_mail_smtp()->get_pro()->get_logs()->is_enabled_open_email_tracking() ) : ?>
							<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--open-count">
								<i></i> <span></span> <?php esc_html_e( 'open count', 'wp-mail-smtp-pro' ); ?>
							</div>
						<?php endif; ?>
						<?php if ( wp_mail_smtp()->get_pro()->get_logs()->is_enabled_click_link_tracking() ) : ?>
							<div class="wp-mail-smtp-email-reports__stats-item wp-mail-smtp-email-reports__stats-item--click-count">
								<i></i> <span></span> <?php esc_html_e( 'click count', 'wp-mail-smtp-pro' ); ?>
							</div>
						<?php endif; ?>
					</div>
				</div>

				<div class="wp-mail-smtp-email-reports__chart-holder">
					<div class="spinner wp-mail-smtp-hide"></div>
					<canvas class="wp-mail-smtp-email-reports__chart" id="wp-mail-smtp-email-reports-chart"></canvas>
				</div>
			</div>

			<?php $this->table->prepare_items(); ?>

			<?php if ( ! empty( $this->report->get_params( 'search' ) ) ) : ?>
				<div id="wp-mail-smtp-reset-filter">
					<?php
					echo wp_kses(
						sprintf( /* translators: %1$d - items count; %2$s - search term. */
							_n( 'Found <strong>%1$d item</strong> where the subject contains <i>%2$s</i>', 'Found <strong>%1$d items</strong> where the subject contains <i>%2$s</i>', count( $this->table->items ), 'wp-mail-smtp-pro' ),
							count( $this->table->items ),
							$this->report->get_params( 'search' )
						),
						[
							'strong' => [],
							'i'      => [],
						]
					);
					?>
					<a href="<?php echo esc_url( remove_query_arg( 's' ) ); ?>">
						<i class="reset dashicons dashicons-dismiss"></i>
					</a>
				</div>
			<?php endif; ?>

			<?php $this->table->display(); ?>
		</form>
		<?php
	}

	/**
	 * Notify user that email reports is disabled.
	 *
	 * @since 3.0.0
	 */
	private function display_reports_disabled() {

		?>
		<div class="wp-mail-smtp-reports-note">
			<h2><?php esc_html_e( 'Email Log Required', 'wp-mail-smtp-pro' ); ?></h2>
			<p>
				<?php
				esc_html_e( 'Email Reports provide valuable insights by aggregating data from the Email Log, allowing you to measure the success of your emails.', 'wp-mail-smtp-pro' );
				?>
			</p>
			<a href="<?php echo esc_url( wp_mail_smtp()->get_admin()->get_admin_page_url( Area::SLUG . '&tab=logs' ) ); ?>" class="wp-mail-smtp-btn wp-mail-smtp-btn-orange wp-mail-smtp-btn-md">
				<?php esc_html_e( 'Enable Email Log', 'wp-mail-smtp-pro' ); ?>
			</a>
		</div>
		<?php
	}

	/**
	 * Notify user that email reports is not installed correctly.
	 *
	 * @since 3.0.0
	 */
	private function display_reports_not_installed() {

		$error_message = get_option( Migration::ERROR_OPTION_NAME );

		$create_missing_tables_url = wp_nonce_url(
			add_query_arg(
				[
					'create-missing-db-tables' => 1,
				],
				wp_mail_smtp()->get_admin()->get_admin_page_url( Area::SLUG . '-reports' )
			),
			Area::SLUG . '-create-missing-db-tables'
		);

		$contact_support_url = wp_mail_smtp()->get_utm_url(
			'https://wpmailsmtp.com/account/support/',
			[
				'medium'  => 'email-reports',
				'content' => 'Email Reports not installed correctly',
			]
		);
		?>

		<div class="wp-mail-smtp-reports-note errored">
			<h2><?php esc_html_e( 'Email Reports are Not Installed Correctly', 'wp-mail-smtp-pro' ); ?></h2>
			<p>
				<?php
				if ( ! empty( $error_message ) ) {
					echo wp_kses(
						sprintf( /* translators: %1$s - create missing tables link; %2$s - contact support link. */
							__( 'WP Mail SMTP is using custom database tables for some of its features. In order to work properly, the custom tables should be created, and it seems they are missing. Please try to <a href="%1$s">create the missing DB tables by clicking on this link</a>. If this issue persists, please <a href="%2$s" target="_blank" rel="noopener noreferrer">contact our support</a> and provide the error message below:', 'wp-mail-smtp-pro' ),
							esc_url( $create_missing_tables_url ),
							esc_url( $contact_support_url )
						),
						[
							'a' => [
								'href'   => [],
								'target' => [],
								'rel'    => [],
							],
						]
					);
					echo '<br><br>';
					echo '<code>' . esc_html( $error_message ) . '</code>';
				} else {
					echo wp_kses(
						sprintf( /* translators: %1$s - create missing tables link; %2$s - contact support link. */
							__( 'WP Mail SMTP is using custom database tables for some of its features. In order to work properly, the custom tables should be created, and it seems they are missing. Please try to <a href="%1$s">create the missing DB tables by clicking on this link</a>. If this issue persists, please <a href="%2$s" target="_blank" rel="noopener noreferrer">contact our support</a>.', 'wp-mail-smtp-pro' ),
							esc_url( $create_missing_tables_url ),
							esc_url( $contact_support_url )
						),
						[
							'a' => [
								'href'   => [],
								'target' => [],
								'rel'    => [],
							],
						]
					);
				}
				?>
			</p>
		</div>
		<?php
	}

	/**
	 * Get single stats by subject ajax handler.
	 *
	 * @since 3.0.0
	 */
	public function get_single_stats_ajax() {

		if ( ! check_ajax_referer( 'wp-mail-smtp-email-reports-nonce', '_wpnonce', false ) ) {
			wp_send_json( esc_html__( 'Access rejected.', 'wp-mail-smtp-pro' ), 403 );
		}

		if ( ! current_user_can( wp_mail_smtp()->get_admin()->get_logs_access_capability() ) ) {
			wp_send_json( esc_html__( 'You don\'t have the capability to perform this action.', 'wp-mail-smtp-pro' ), 403 );
		}

		$report = new Report( $this->parse_report_params() );

		wp_send_json(
			[
				'totals'             => $report->get_stats_totals(),
				'by_date_chart_data' => $report->get_stats_by_date_chart_data(),
			]
		);
	}
}
