<?php
/**
 * Admin Controller for Managing Dashboard Views, Importer, and Hooks.
 *
 * @package AffiStyle
 */

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

/**
 * Class AffiStyle_Admin_Controller
 *
 * Handles rendering admin views and dashboard components.
 */
class AffiStyle_Admin_Controller {

	/**
	 * Hook suffix for the analytics menu page.
	 *
	 * @var string
	 */
	private $analytics_hook_suffix = '';

	/**
	 * Hook suffix for the importer menu page.
	 *
	 * @var string
	 */
	private $importer_hook_suffix = '';

	/**
	 * Constructor.
	 */
	public function __construct() {
		add_action( 'admin_menu', array( $this, 'register_admin_menus' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );

		// AJAX endpoints for Affiliate Importer & Migration Engine.
		add_action( 'wp_ajax_affistyle_importer_scan', array( $this, 'ajax_importer_scan' ) );
		add_action( 'wp_ajax_affistyle_importer_get_items', array( $this, 'ajax_importer_get_items' ) );
		add_action( 'wp_ajax_affistyle_importer_batch_import', array( $this, 'ajax_importer_batch_import' ) );
	}

	/**
	 * Register submenu pages under AffiStyle CPT.
	 */
	public function register_admin_menus() {
		$this->analytics_hook_suffix = add_submenu_page(
			'edit.php?post_type=affistyle_box',
			__( 'Click Analytics', 'affistyle' ),
			__( 'Analytics 📊', 'affistyle' ),
			'manage_options',
			'affistyle-analytics',
			array( $this, 'render_analytics_page' )
		);

		$this->importer_hook_suffix = add_submenu_page(
			'edit.php?post_type=affistyle_box',
			__( 'Import & Migrate', 'affistyle' ),
			__( 'Import / Migrate 📥', 'affistyle' ),
			'manage_options',
			'affistyle-importer',
			array( $this, 'render_importer_page' )
		);
	}

	/**
	 * Enqueue assets specifically for AffiStyle admin screens.
	 *
	 * @param string $hook Current admin page hook.
	 */
	public function enqueue_admin_assets( $hook ) {
		if ( $hook === $this->analytics_hook_suffix ) {
			wp_enqueue_style(
				'affistyle-admin-css',
				AFFISTYLE_URL . 'assets/css/admin-style.css',
				array(),
				AFFISTYLE_VERSION
			);

			wp_enqueue_script(
				'affistyle-admin-analytics',
				AFFISTYLE_URL . 'assets/js/admin-analytics.js',
				array(),
				AFFISTYLE_VERSION,
				array(
					'strategy'  => 'defer',
					'in_footer' => true,
				)
			);

			$affistyle_date_range = '7';
			$affistyle_start_date = '';
			$affistyle_end_date   = '';

			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
			if ( isset( $_GET['date_range'] ) ) {
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$affistyle_date_range = sanitize_text_field( wp_unslash( $_GET['date_range'] ) );
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$affistyle_start_date = isset( $_GET['start_date'] ) ? sanitize_text_field( wp_unslash( $_GET['start_date'] ) ) : '';
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$affistyle_end_date = isset( $_GET['end_date'] ) ? sanitize_text_field( wp_unslash( $_GET['end_date'] ) ) : '';
			}

			$chart_data = class_exists( 'AffiStyle_Database' )
				? AffiStyle_Database::get_clicks_time_series( $affistyle_date_range, $affistyle_start_date, $affistyle_end_date )
				: array(
					'labels'       => array(),
					'full_labels'  => array(),
					'data'         => array(),
					'interval'     => 'daily',
					'total_clicks' => 0,
					'max_value'    => 0,
				);

			wp_localize_script(
				'affistyle-admin-analytics',
				'affistyleAnalyticsData',
				array(
					'chart'   => $chart_data,
					'strings' => array(
						'clicks'   => __( 'Clicks', 'affistyle' ),
						'click'    => __( 'Click', 'affistyle' ),
						'noData'   => __( 'No click activity recorded in this period.', 'affistyle' ),
						'allZeros' => __( '0 Clicks in this timeframe', 'affistyle' ),
					),
				)
			);
		}

		if ( $hook === $this->importer_hook_suffix ) {
			wp_enqueue_style(
				'affistyle-admin-css',
				AFFISTYLE_URL . 'assets/css/admin-style.css',
				array(),
				AFFISTYLE_VERSION
			);

			wp_enqueue_script(
				'affistyle-admin-importer',
				AFFISTYLE_URL . 'assets/js/admin-importer.js',
				array( 'jquery' ),
				AFFISTYLE_VERSION,
				array(
					'strategy'  => 'defer',
					'in_footer' => true,
				)
			);

			wp_localize_script(
				'affistyle-admin-importer',
				'affistyleImporterL10n',
				array(
					'ajax_url'           => admin_url( 'admin-ajax.php' ),
					'nonce'              => wp_create_nonce( 'affistyle_importer_nonce' ),
					'scanning'           => __( 'Scanning database for affiliate plugins...', 'affistyle' ),
					'loadingItems'       => __( 'Loading source items...', 'affistyle' ),
					'importing'          => __( 'Importing items into AffiStyle...', 'affistyle' ),
					'importComplete'     => __( '✓ Import finished!', 'affistyle' ),
					'confirmBatchImport' => __( 'Are you sure you want to import these items into AffiStyle boxes?', 'affistyle' ),
					'noItemsSelected'    => __( 'Please select at least one item to import.', 'affistyle' ),
					'viewBox'            => __( 'Edit Box', 'affistyle' ),
					'errorOccurred'      => __( 'An error occurred during import. Please try again.', 'affistyle' ),
				)
			);
		}
	}

	/**
	 * Render the Analytics Dashboard view.
	 */
	public function render_analytics_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'affistyle' ) );
		}

		$view_file = AFFISTYLE_PATH . 'admin/views/analytics-page.php';
		if ( file_exists( $view_file ) ) {
			include_once $view_file;
		} else {
			echo '<div class="wrap"><p>' . esc_html__( 'Analytics view file missing.', 'affistyle' ) . '</p></div>';
		}
	}

	/**
	 * Render the Importer Dashboard view.
	 */
	public function render_importer_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'affistyle' ) );
		}

		$view_file = AFFISTYLE_PATH . 'admin/views/importer-page.php';
		if ( file_exists( $view_file ) ) {
			include_once $view_file;
		} else {
			echo '<div class="wrap"><p>' . esc_html__( 'Importer view file missing.', 'affistyle' ) . '</p></div>';
		}
	}

	/**
	 * AJAX handler: Scan database for affiliate sources.
	 */
	public function ajax_importer_scan() {
		check_ajax_referer( 'affistyle_importer_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'affistyle' ) ) );
		}

		if ( ! class_exists( 'AffiStyle_Importer' ) ) {
			wp_send_json_error( array( 'message' => __( 'Importer engine missing.', 'affistyle' ) ) );
		}

		$sources = AffiStyle_Importer::detect_sources();
		wp_send_json_success( array( 'sources' => $sources ) );
	}

	/**
	 * AJAX handler: Fetch items from a given source for preview or selective import.
	 */
	public function ajax_importer_get_items() {
		check_ajax_referer( 'affistyle_importer_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'affistyle' ) ) );
		}

		$source = isset( $_POST['source'] ) ? sanitize_key( wp_unslash( $_POST['source'] ) ) : '';
		$limit  = isset( $_POST['limit'] ) ? absint( wp_unslash( $_POST['limit'] ) ) : 50;
		$offset = isset( $_POST['offset'] ) ? absint( wp_unslash( $_POST['offset'] ) ) : 0;

		if ( empty( $source ) || ! class_exists( 'AffiStyle_Importer' ) ) {
			wp_send_json_error( array( 'message' => __( 'Invalid source provider specified.', 'affistyle' ) ) );
		}

		$items = AffiStyle_Importer::get_source_items( $source, $limit, $offset );
		wp_send_json_success( array( 'items' => $items ) );
	}

	/**
	 * AJAX handler: Import a batch of items chunk by chunk.
	 */
	public function ajax_importer_batch_import() {
		check_ajax_referer( 'affistyle_importer_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'affistyle' ) ) );
		}

		$items           = isset( $_POST['items'] ) && is_array( $_POST['items'] ) ? wp_unslash( $_POST['items'] ) : array(); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$skip_duplicates = isset( $_POST['skip_duplicates'] ) ? '1' === sanitize_text_field( wp_unslash( $_POST['skip_duplicates'] ) ) : true;
		$default_style   = isset( $_POST['default_style'] ) ? sanitize_key( wp_unslash( $_POST['default_style'] ) ) : 'style-1';

		if ( empty( $items ) || ! class_exists( 'AffiStyle_Importer' ) ) {
			wp_send_json_error( array( 'message' => __( 'No items provided for import.', 'affistyle' ) ) );
		}

		$options = array(
			'skip_duplicates' => $skip_duplicates,
			'default_style'   => $default_style,
		);

		$results = array();
		foreach ( $items as $raw_item ) {
			if ( is_array( $raw_item ) ) {
				$results[] = AffiStyle_Importer::import_item( $raw_item, $options );
			}
		}

		wp_send_json_success( array( 'results' => $results ) );
	}
}