<?php
defined( 'ABSPATH' ) || exit;

/**
 * Admin shell: menu registration, asset loading, page chrome (topbar/footer),
 * date-range resolution and cross-feature CSV export. Screen content is
 * delegated to the per-feature admin controllers.
 */
class RT_WA_Analytics_Admin {

	use RT_WA_Analytics_Date_Range;

	private $db;
	private $settings;

	/** @var RT_WA_Analytics_Reports_Admin */
	private $reports_admin;
	/** @var RT_WA_Analytics_Leads_Admin */
	private $leads_admin;
	/** @var RT_WA_Analytics_Settings_Admin */
	private $settings_admin;

	public function __construct() {
		$this->db       = RT_WA_Analytics_DB::instance();
		$this->settings = RT_WA_Analytics_Settings::instance();

		$this->reports_admin  = new RT_WA_Analytics_Reports_Admin();
		$this->leads_admin    = new RT_WA_Analytics_Leads_Admin();
		$this->settings_admin = new RT_WA_Analytics_Settings_Admin();

		add_action( 'admin_menu', array( $this, 'add_admin_menu' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_menu_icon_css' ) );
		add_action( 'admin_init', array( $this, 'redirect_legacy_slug' ) );
		add_action( 'admin_init', array( $this, 'handle_csv_export' ) );
		add_filter( 'admin_title', array( $this, 'filter_admin_title' ), 10, 2 );
		add_filter( 'admin_page_title', array( $this, 'filter_admin_page_title' ) );
	}

	/**
	 * Contextual browser/admin tab title for every plugin page.
	 *
	 * @param string $admin_title Current admin title.
	 * @param string $title       Raw page title.
	 * @return string
	 */
	public function filter_admin_title( $admin_title, $title ) {
		$page = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended

		$labels = array(
			'zaaed-wa-dashboard'      => __( 'Dashboard', 'zaaed-click2chat' ),
			'zaaed-wa-signal'         => __( 'WhatsApp Clicks', 'zaaed-click2chat' ),
			'zaaed-wa-leads'          => __( 'Leads', 'zaaed-click2chat' ),
			'zaaed-wa-conversions'    => __( 'Conversion Outcomes', 'zaaed-click2chat' ),
			'zaaed-wa-analytics-page' => __( 'Attribution Insights', 'zaaed-click2chat' ),
			'zaaed-wa-settings'       => __( 'Settings', 'zaaed-click2chat' ),
		);

		if ( ! empty( $page ) && isset( $labels[ $page ] ) ) {
			return __( 'Zaaed Click2Chat', 'zaaed-click2chat' ) . ' — ' . $labels[ $page ];
		}

		return $admin_title;
	}

	/**
	 * In-page heading title for the plugin pages.
	 *
	 * @param string $title Raw page title.
	 * @return string
	 */
	public function filter_admin_page_title( $title ) {
		$page = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended

		if ( ! empty( $page ) && in_array( $page, array( 'zaaed-wa-dashboard', 'zaaed-wa-signal', 'zaaed-wa-leads', 'zaaed-wa-conversions', 'zaaed-wa-analytics-page', 'zaaed-wa-settings' ), true ) ) {
			return __( 'Zaaed Click2Chat', 'zaaed-click2chat' );
		}

		return $title;
	}

	/**
	 * Redirect bookmarked requests for legacy rt-wa-* admin slugs to the current zaaed-wa-* ones.
	 */
	public function redirect_legacy_slug() {
		if ( ! isset( $_GET['page'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return;
		}

		$page = sanitize_key( wp_unslash( $_GET['page'] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Admin render context; capability-gated by add_menu_page.

		$legacy_map = array(
			'zaaed-click2chat'     => 'zaaed-wa-dashboard',
			'rt-wa-leads'          => 'zaaed-wa-leads',
			'rt-wa-conversions'    => 'zaaed-wa-conversions',
			'rt-wa-analytics-page' => 'zaaed-wa-analytics-page',
			'rt-wa-settings'       => 'zaaed-wa-settings',
		);

		if ( ! isset( $legacy_map[ $page ] ) || $page === $legacy_map[ $page ] ) {
			return;
		}

		$params = $_GET; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		unset( $params['page'] );
		$params['page'] = $legacy_map[ $page ];

		wp_safe_redirect( add_query_arg( $params, admin_url( 'admin.php' ) ) );
		exit;
	}

	public function add_admin_menu() {
		$capability = 'manage_options';

		add_menu_page(
			__( 'Zaaed Click2Chat', 'zaaed-click2chat' ),
			__( 'Zaaed Click2Chat', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-dashboard',
			array( $this, 'render_page' ),
			RT_WA_ANALYTICS_URL . 'assets/images/zaaed-menu-icon.png',
			30
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'Dashboard', 'zaaed-click2chat' ),
			__( 'Dashboard', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-dashboard',
			array( $this, 'render_page' )
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'WhatsApp Clicks', 'zaaed-click2chat' ),
			__( 'WhatsApp Clicks', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-signal',
			array( $this, 'render_page' )
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'UTM Links', 'zaaed-click2chat' ),
			__( 'UTM Links', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-utm-links',
			array( $this, 'render_page' )
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'Leads', 'zaaed-click2chat' ),
			__( 'Leads', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-leads',
			array( $this, 'render_page' )
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'Conversion Outcomes', 'zaaed-click2chat' ),
			__( 'Conversion Outcomes', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-conversions',
			array( $this, 'render_page' )
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'Attribution Insights', 'zaaed-click2chat' ),
			__( 'Attribution Insights', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-analytics-page',
			array( $this, 'render_page' )
		);

		add_submenu_page(
			'zaaed-wa-dashboard',
			__( 'Settings', 'zaaed-click2chat' ),
			__( 'Settings', 'zaaed-click2chat' ),
			$capability,
			'zaaed-wa-settings',
			array( $this, 'render_page' )
		);
	}

	public function enqueue_admin_assets( $hook ) {
		if ( strpos( $hook, 'zaaed-wa-' ) === false && strpos( $hook, 'rt-wa-' ) === false ) {
			return;
		}

		wp_enqueue_style(
			'rt-wa-analytics-admin',
			RT_WA_ANALYTICS_URL . 'assets/css/admin.css',
			array(),
			RT_WA_ANALYTICS_VERSION
		);

		// Suppress generic WordPress notices inside plugin screens (scoped to
		// .rt-wa-wrap only), delivered through the proper styles API.
		wp_add_inline_style(
			'rt-wa-analytics-admin',
			'.rt-wa-wrap .notice, .rt-wa-wrap .updated, .rt-wa-wrap .error, .rt-wa-wrap #wpbody-content > .notice, .rt-wa-wrap #wpbody-content > .updated, .rt-wa-wrap #wpbody-content > .error { display: none; }'
		);

		// Note: no external font CDN. The admin stylesheet relies on system
		// font stacks (WordPress.org guidelines disallow third-party CDNs).

		wp_enqueue_script(
			'rt-wa-analytics-admin',
			RT_WA_ANALYTICS_URL . 'assets/js/admin.js',
			array( 'jquery', 'chart-js' ),
			RT_WA_ANALYTICS_VERSION,
			true
		);

		wp_localize_script(
			'rt-wa-analytics-admin',
			'rtWaAnalytics',
			array(
				'ajaxUrl'      => admin_url( 'admin-ajax.php' ),
				'nonce'        => wp_create_nonce( 'rt_wa_analytics_nonce' ),
				'i18n'         => array(
					'confirmDelete'         => __( 'Are you sure?', 'zaaed-click2chat' ),
					'saving'                => __( 'Saving...', 'zaaed-click2chat' ),
					'saved'                 => __( 'Saved successfully!', 'zaaed-click2chat' ),
					'error'                 => __( 'An error occurred.', 'zaaed-click2chat' ),
					'apiKeyRevoked'         => __( 'API Key revoked.', 'zaaed-click2chat' ),
					'dataReset'             => __( 'Data reset successfully.', 'zaaed-click2chat' ),
					'noData'                => __( 'No data available.', 'zaaed-click2chat' ),
					'cancel'                => __( 'Cancel', 'zaaed-click2chat' ),
					'addAudience'           => __( 'Add Audience', 'zaaed-click2chat' ),
					'added'                 => __( 'Added to Audience', 'zaaed-click2chat' ),
					'show'                  => __( 'Show', 'zaaed-click2chat' ),
					'hide'                  => __( 'Hide', 'zaaed-click2chat' ),
					// translators: %s: number of WhatsApp signals.
					'lastWaClicks'          => __( 'Last %s Signals', 'zaaed-click2chat' ),
					'addLead'               => __( 'Add Lead', 'zaaed-click2chat' ),
					'editLead'              => __( 'Edit Lead', 'zaaed-click2chat' ),
					'save'                  => __( 'Save', 'zaaed-click2chat' ),
					'leadName'              => __( 'Name', 'zaaed-click2chat' ),
					'leadPhone'             => __( 'Phone', 'zaaed-click2chat' ),
					'leadWaPhone'           => __( 'WhatsApp Number', 'zaaed-click2chat' ),
					'leadEmail'             => __( 'Email', 'zaaed-click2chat' ),
					'leadStatus'            => __( 'Status', 'zaaed-click2chat' ),
					'leadValue'             => __( 'Opportunity Value', 'zaaed-click2chat' ),
					'leadCurrency'          => __( 'Currency', 'zaaed-click2chat' ),
					'leadSource'            => __( 'Source', 'zaaed-click2chat' ),
					'leadMedium'            => __( 'Medium', 'zaaed-click2chat' ),
					'leadCampaign'          => __( 'Campaign', 'zaaed-click2chat' ),
					'leadLandingPage'       => __( 'Signal Entry Page URL', 'zaaed-click2chat' ),
					'leadNotes'             => __( 'Notes', 'zaaed-click2chat' ),
					'confirmStatusChange'   => __( 'Move this lead in the pipeline?', 'zaaed-click2chat' ),
					'confirmDeleteLead'     => __( 'Delete this lead? This will also remove its status history and cannot be undone.', 'zaaed-click2chat' ),
					'utmBreakdown'          => __( 'UTM Breakdown', 'zaaed-click2chat' ),
					'clickDetails'          => __( 'Click Details', 'zaaed-click2chat' ),
					'trafficSource'         => __( 'Traffic Source', 'zaaed-click2chat' ),
					'referrer'              => __( 'Referrer', 'zaaed-click2chat' ),
					'close'                 => __( 'Close', 'zaaed-click2chat' ),
					'noUtmData'             => __( 'No UTM parameters captured for this click.', 'zaaed-click2chat' ),
					'timestamp'             => __( 'Timestamp', 'zaaed-click2chat' ),
					'whatsappNumber'        => __( 'WhatsApp Number', 'zaaed-click2chat' ),
					'sessionId'             => __( 'Session', 'zaaed-click2chat' ),
					'country'               => __( 'Country', 'zaaed-click2chat' ),
					'term'                  => __( 'Term', 'zaaed-click2chat' ),
					'content'               => __( 'Content', 'zaaed-click2chat' ),
					'waSignals'             => __( 'WA Signals', 'zaaed-click2chat' ),
					'conversations'         => __( 'Conversations', 'zaaed-click2chat' ),
					'noSignals'             => __( 'No WhatsApp signals yet.', 'zaaed-click2chat' ),
					'copyLink'              => __( 'Copy', 'zaaed-click2chat' ),
					'copied'                => __( 'Copied!', 'zaaed-click2chat' ),
					'copyFailed'            => __( 'Could not copy the link.', 'zaaed-click2chat' ),
					'savingLink'            => __( 'Saving link...', 'zaaed-click2chat' ),
					'savedLink'             => __( 'Link saved.', 'zaaed-click2chat' ),
					'duplicateLink'         => __( 'A saved link with this exact URL already exists.', 'zaaed-click2chat' ),
					'requiredUrl'           => __( 'Please enter a valid http(s) URL.', 'zaaed-click2chat' ),
					'requiredFields'        => __( 'Name and destination are required.', 'zaaed-click2chat' ),
					'confirmDeleteLink'     => __( 'Delete this UTM link?', 'zaaed-click2chat' ),
					'deletedLink'           => __( 'Link deleted.', 'zaaed-click2chat' ),
					'previewLabel'          => __( 'Generated URL preview', 'zaaed-click2chat' ),
					'generated'             => __( 'Link generated — review it below, then save.', 'zaaed-click2chat' ),
					'savingDefaults'        => __( 'Saving defaults...', 'zaaed-click2chat' ),
					'defaultsSaved'         => __( 'UTM defaults saved.', 'zaaed-click2chat' ),
					'detectionFailed'       => __( 'Detection failed', 'zaaed-click2chat' ),
					'requestFailed'         => __( 'Request failed. Please try again.', 'zaaed-click2chat' ),
					'deleteSelected'        => __( 'Delete Selected', 'zaaed-click2chat' ),
					'deleteSelectedBlocked' => __( 'Delete Selected (revoke active keys first)', 'zaaed-click2chat' ),
					'confirmTitle'          => __( 'Are you sure?', 'zaaed-click2chat' ),
					'confirmMessage'        => __( 'This action cannot be undone.', 'zaaed-click2chat' ),
					'confirm'               => __( 'Confirm', 'zaaed-click2chat' ),
					'trafficFlow'           => __( 'Traffic Flow', 'zaaed-click2chat' ),
					/* translators: %d: number of visitors. */
					'visitorsSection'       => __( 'Visitors (%d)', 'zaaed-click2chat' ),
					/* translators: %d: number of events. */
					'eventsSection'         => __( 'Events (%d)', 'zaaed-click2chat' ),
					/* translators: %s: search query. */
					'noResultsFor'          => __( 'No results found for "%s"', 'zaaed-click2chat' ),
					/* translators: 1: number of detected integrations, 2: total integrations. */
					'integrationsDetected'  => __( '%1$d of %2$d integrations detected', 'zaaed-click2chat' ),
					'detected'              => __( 'Detected', 'zaaed-click2chat' ),
					'notDetected'           => __( 'Not Detected', 'zaaed-click2chat' ),
					'deleteApiKeyTitle'     => __( 'Delete API Key', 'zaaed-click2chat' ),
					'deleteKeyMessage'      => __( 'Are you sure you want to permanently delete this revoked API key? This action cannot be undone.', 'zaaed-click2chat' ),
					'deleteSelectedTitle'   => __( 'Delete Selected Keys', 'zaaed-click2chat' ),
					/* translators: %d: number of API keys. */
					'deleteKeysMessage'     => __( 'Are you sure you want to permanently delete %d selected revoked API key(s)? This action cannot be undone.', 'zaaed-click2chat' ),
					/* translators: %d: number of API keys. */
					'deleteN'               => __( 'Delete (%d)', 'zaaed-click2chat' ),
					'revokeKeyTitle'        => __( 'Revoke API Key', 'zaaed-click2chat' ),
					'revokeKeyMessage'      => __( 'Are you sure you want to revoke this API key? Any services or applications using this key will immediately lose access to the API. This action cannot be undone.', 'zaaed-click2chat' ),
					'deleteAllRevokedTitle' => __( 'Delete All Revoked Keys', 'zaaed-click2chat' ),
					'deleteAllMessage'      => __( 'Are you sure you want to permanently delete all revoked API keys? This action cannot be undone.', 'zaaed-click2chat' ),
					'deleteAll'             => __( 'Delete All', 'zaaed-click2chat' ),
				),
				'leadStatuses' => $this->get_lead_statuses_for_js(),
			)
		);

		wp_enqueue_script(
			'chart-js',
			RT_WA_ANALYTICS_URL . 'assets/js/chart.umd.min.js',
			array(),
			'4.5.1',
			true
		);
	}

	/**
	 * Load the Zaaed menu icon styles on every admin page so the sidebar
	 * icon renders centered and undistorted regardless of the current screen.
	 */
	public function enqueue_menu_icon_css() {
		wp_enqueue_style(
			'rt-wa-menu-icon',
			RT_WA_ANALYTICS_URL . 'assets/css/admin-menu-icon.css',
			array(),
			RT_WA_ANALYTICS_VERSION
		);
	}

	private function get_lead_statuses_for_js() {
		$statuses = RT_WA_Analytics_Leads::instance()->get_statuses();
		$items    = array();
		foreach ( $statuses as $key => $label ) {
			$items[] = array(
				'key'   => $key,
				'label' => $label,
			);
		}
		return $items;
	}

	public function render_page() {
		$this->render_shell();
	}

	private function render_shell() {
		$this->resolve_date_range();

		$date_from     = $this->date_from;
		$date_to       = $this->date_to;
		$date_label    = $this->date_label;
		$earliest_date = $this->db->get_earliest_record_date();
		$earliest_year = (int) gmdate( 'Y', strtotime( $earliest_date ) );
		$current_year  = (int) current_time( 'Y' );
		?>
		<div class="rt-wa-wrap">
			<main class="rt-wa-main">
				<header class="rt-wa-topbar">
					<a class="rt-wa-brand" href="<?php echo esc_url( admin_url( 'admin.php?page=zaaed-wa-dashboard' ) ); ?>" aria-label="<?php esc_attr_e( 'Zaaed Click2Chat dashboard', 'zaaed-click2chat' ); ?>">
						<span class="rt-wa-brand-logo"><img src="<?php echo esc_url( RT_WA_ANALYTICS_URL . 'assets/images/zaaed-menu-icon.png' ); ?>" alt="Zaaed"></span>
						<span class="rt-wa-brand-text">
							<span class="rt-wa-brand-name"><?php esc_html_e( 'Zaaed Click2Chat', 'zaaed-click2chat' ); ?></span>
							<span class="rt-wa-brand-sub"><?php esc_html_e( 'Click Tracking & Lead Pipeline', 'zaaed-click2chat' ); ?></span>
						</span>
					</a>
					<div style="display:flex;align-items:center;gap:16px;flex:1;justify-content:flex-end;min-width:0;">
						<div style="position:relative;max-width:340px;width:100%;min-width:0;">
							<span class="dashicons dashicons-search" style="position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--rt-outline);font-size:18px;width:18px;height:18px;"></span>
							<input type="text" class="rt-wa-form-control rt-wa-search-input" style="padding-left:38px;background:var(--rt-surface-container-low);border:none;" placeholder="<?php esc_attr_e( 'Search analytics data...', 'zaaed-click2chat' ); ?>">
						</div>
					</div>
					<div style="display:flex;align-items:center;gap:12px;flex-shrink:0;">
						<span class="rt-wa-version-badge"><?php echo esc_html( 'v' . RT_WA_ANALYTICS_VERSION ); ?></span>
						<div class="rt-wa-date-filter" data-from="<?php echo esc_attr( $date_from ); ?>" data-to="<?php echo esc_attr( $date_to ); ?>" data-min-date="<?php echo esc_attr( $earliest_date ); ?>">
							<button type="button" class="rt-wa-date-filter-btn">
								<span class="dashicons dashicons-calendar" style="font-size:16px;width:16px;height:16px;color:var(--rt-outline);"></span>
								<span class="rt-wa-date-filter-label"><?php echo esc_html( $date_label ); ?></span>
								<span class="dashicons dashicons-arrow-down-alt2" style="font-size:12px;width:12px;height:12px;color:var(--rt-outline);"></span>
							</button>
							<div class="rt-wa-date-picker" role="dialog" aria-label="<?php esc_attr_e( 'Select date range', 'zaaed-click2chat' ); ?>">
								<div class="rt-wa-date-presets">
									<button type="button" class="rt-wa-date-preset" data-preset="today"><?php esc_html_e( 'Today', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-preset" data-preset="yesterday"><?php esc_html_e( 'Yesterday', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-preset" data-preset="last7"><?php esc_html_e( 'Last 7 Days', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-preset" data-preset="last30"><?php esc_html_e( 'Last 30 Days', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-preset" data-preset="month"><?php esc_html_e( 'This Month', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-preset" data-preset="year"><?php esc_html_e( 'This Year', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-preset rt-wa-date-preset-all" data-preset="all"><?php esc_html_e( 'All Time', 'zaaed-click2chat' ); ?></button>
								</div>
								<div class="rt-wa-date-modes">
									<button type="button" class="rt-wa-date-mode" data-mode="range"><?php esc_html_e( 'Range', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-mode" data-mode="day"><?php esc_html_e( 'Day', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-mode" data-mode="month"><?php esc_html_e( 'Month', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-date-mode" data-mode="year"><?php esc_html_e( 'Year', 'zaaed-click2chat' ); ?></button>
								</div>
								<div class="rt-wa-date-inputs rt-wa-date-inputs-range">
									<div class="rt-wa-form-group">
										<label><?php esc_html_e( 'From', 'zaaed-click2chat' ); ?></label>
										<input type="date" id="rt-wa-dp-from" class="rt-wa-form-control" value="<?php echo esc_attr( $date_from ); ?>">
									</div>
									<div class="rt-wa-form-group">
										<label><?php esc_html_e( 'To', 'zaaed-click2chat' ); ?></label>
										<input type="date" id="rt-wa-dp-to" class="rt-wa-form-control" value="<?php echo esc_attr( $date_to ); ?>">
									</div>
								</div>
								<div class="rt-wa-date-inputs rt-wa-date-inputs-day" style="display:none;">
									<div class="rt-wa-form-group">
										<label><?php esc_html_e( 'Pick a day', 'zaaed-click2chat' ); ?></label>
										<input type="date" id="rt-wa-dp-day" class="rt-wa-form-control" value="<?php echo $date_from === $date_to ? esc_attr( $date_from ) : esc_attr( $date_to ); ?>">
									</div>
								</div>
								<div class="rt-wa-date-inputs rt-wa-date-inputs-month" style="display:none;">
									<div class="rt-wa-form-group">
										<label><?php esc_html_e( 'Pick a month', 'zaaed-click2chat' ); ?></label>
										<input type="month" id="rt-wa-dp-month" class="rt-wa-form-control" value="<?php echo esc_attr( substr( $date_to, 0, 7 ) ); ?>">
									</div>
								</div>
								<div class="rt-wa-date-inputs rt-wa-date-inputs-year" style="display:none;">
									<div class="rt-wa-form-group">
										<label><?php esc_html_e( 'Pick a year', 'zaaed-click2chat' ); ?></label>
										<select id="rt-wa-dp-year" class="rt-wa-form-control">
											<?php for ( $y = $current_year; $y >= $earliest_year; $y-- ) : ?>
												<option value="<?php echo esc_attr( $y ); ?>" <?php selected( $y, (int) substr( $date_to, 0, 4 ) ); ?>><?php echo esc_html( $y ); ?></option>
											<?php endfor; ?>
										</select>
									</div>
								</div>
								<div class="rt-wa-date-actions">
									<button type="button" class="rt-wa-btn rt-wa-btn-secondary rt-wa-date-clear"><?php esc_html_e( 'Clear', 'zaaed-click2chat' ); ?></button>
									<button type="button" class="rt-wa-btn rt-wa-btn-primary rt-wa-date-apply"><?php esc_html_e( 'Apply', 'zaaed-click2chat' ); ?></button>
								</div>
							</div>
						</div>
					</div>
				</header>

				<div class="rt-wa-content">
					<?php
					$active_page = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : 'zaaed-wa-dashboard'; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
					switch ( $active_page ) {
						case 'zaaed-wa-dashboard':
							$this->reports_admin->render_dashboard_content();
							break;
						case 'zaaed-wa-signal':
							$this->reports_admin->render_whatsapp_clicks_content();
							break;
						case 'zaaed-wa-utm-links':
							$this->reports_admin->render_utm_links_content();
							break;
						case 'zaaed-wa-leads':
							$this->leads_admin->render_leads_content();
							break;
						case 'zaaed-wa-conversions':
							$this->leads_admin->render_conversions_content();
							break;
						case 'zaaed-wa-analytics-page':
							$this->reports_admin->render_analytics_content();
							break;
						case 'zaaed-wa-settings':
							$this->settings_admin->render_settings_content();
							break;
						default:
							$this->reports_admin->render_dashboard_content();
							break;
					}
					?>
				</div>

				<footer class="rt-wa-footer">
					<p>&copy; <?php echo esc_html( date_i18n( 'Y' ) ); ?> <a href="https://zaaed.com/" target="_blank" rel="noopener" style="color:var(--rt-secondary);text-decoration:none;font-weight:600;"><?php esc_html_e( 'Zaaed.com', 'zaaed-click2chat' ); ?></a>.</p>
					<div style="display:flex;gap:24px;">
						<a href="https://zaaed.com/click2chat" target="_blank" rel="noopener" style="color:var(--rt-secondary);text-decoration:none;font-size:12px;"><?php esc_html_e( 'Documentation', 'zaaed-click2chat' ); ?></a>
						<a href="https://zaaed.com/privacy-policy" target="_blank" rel="noopener" style="color:var(--rt-secondary);text-decoration:none;font-size:12px;"><?php esc_html_e( 'Privacy Policy', 'zaaed-click2chat' ); ?></a>
					</div>
				</footer>
			</main>
		</div>
		<?php
	}

	public function handle_csv_export() {
		if ( ! isset( $_GET['export'] ) || ! isset( $_GET['_wpnonce'] ) ) {
			return;
		}

		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ), 'rt_wa_analytics_nonce' ) ) {
			return;
		}

		if ( ! current_user_can( 'manage_options' ) || ! current_user_can( 'zaaed_manage_leads' ) ) {
			return;
		}

		$type = sanitize_key( wp_unslash( $_GET['export'] ) );
		if ( ! in_array( $type, array( 'leads', 'whatsapp-clicks' ), true ) ) {
			return;
		}

		$this->resolve_date_range();

		$this->export_csv( $type );
	}

	private function sanitize_csv_field( $value ) {
		$value = (string) $value;
		if ( $value !== '' && preg_match( '/^[=+@\t\r-]/', $value ) ) {
			return "'" . $value;
		}
		return $value;
	}

	private function export_csv( $type ) {
		global $wpdb;

		set_time_limit( 0 ); // phpcs:ignore Squiz.PHP.DiscouragedFunctions.Discouraged

		$filename = 'zaaed-click2chat-' . gmdate( 'Y-m-d' ) . '.csv';
		header( 'Content-Type: text/csv; charset=utf-8' );
		header( 'Content-Disposition: attachment; filename="' . $filename . '"' );
		header( 'X-Content-Type-Options: nosniff' );
		header( 'Cache-Control: no-store, no-cache, must-revalidate, max-age=0' );
		header( 'Pragma: no-cache' );
		header( 'Expires: 0' );
		$output = fopen( 'php://output', 'w' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fopen
		if ( false === $output ) {
			exit;
		}

		// UTF-8 byte-order mark so spreadsheet apps detect the encoding.
		fwrite( $output, "\xEF\xBB\xBF" ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fwrite

		$leads = RT_WA_Analytics_Leads::instance();

		switch ( $type ) {
			case 'leads':
				fputcsv( $output, array( 'ID', 'Name', 'Phone', 'WA Phone', 'Email', 'Status', 'Source', 'Medium', 'Campaign', 'Term', 'Content', 'Landing Page', 'Value', 'Currency', 'Created', 'Updated' ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fputcsv
				$rows = $leads->get_export_rows();
				foreach ( $rows as $row ) {
					$row->phone    = $leads->reveal_value( $row->phone );
					$row->wa_phone = $leads->reveal_value( $row->wa_phone );
					fputcsv( $output, array_map( array( $this, 'sanitize_csv_field' ), get_object_vars( $row ) ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fputcsv
				}
				break;
			case 'whatsapp-clicks':
				fputcsv( $output, array( 'ID', 'Time', 'Visitor', 'Page', 'Source', 'Medium', 'Campaign', 'Term', 'Content', 'Referrer', 'WhatsApp Number', 'Device', 'Browser', 'OS', 'Country' ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fputcsv
				$filters = array(
					'date_from'  => $this->date_from,
					'date_to'    => $this->date_to,
					'source'     => isset( $_GET['source'] ) ? sanitize_text_field( wp_unslash( $_GET['source'] ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
					'utm_medium' => isset( $_GET['utm_medium'] ) ? sanitize_text_field( wp_unslash( $_GET['utm_medium'] ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
					'campaign'   => isset( $_GET['campaign'] ) ? sanitize_text_field( wp_unslash( $_GET['campaign'] ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
					'page'       => isset( $_GET['landing'] ) ? sanitize_text_field( wp_unslash( $_GET['landing'] ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
					'visitor'    => isset( $_GET['visitor'] ) ? sanitize_text_field( wp_unslash( $_GET['visitor'] ) ) : '', // phpcs:ignore WordPress.Security.NonceVerification.Recommended
				);
				$rows    = $this->db->get_whatsapp_export_rows( $filters, 10000 );
				foreach ( $rows as $row ) {
					$row->whatsapp_number = $leads->reveal_value( $row->whatsapp_number );
					fputcsv( $output, array_map( array( $this, 'sanitize_csv_field' ), get_object_vars( $row ) ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fputcsv
				}
				break;
			default:
				fputcsv( $output, array( 'No data' ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fputcsv
		}

		fclose( $output ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fclose
		exit;
	}
}