<?php
/**
 * WooCommerce Settings tab and order-page meta box for WooList.
 *
 * @package WooList
 */

defined( 'ABSPATH' ) || exit;

class WooList_Admin {

	/** @var WooList_API */
	private WooList_API $api;

	public function __construct( WooList_API $api ) {
		$this->api = $api;

		// WooCommerce settings tab.
		add_filter( 'woocommerce_settings_tabs_array', [ $this, 'add_settings_tab' ], 50 );
		add_action( 'woocommerce_settings_tabs_woolist', [ $this, 'render_settings' ] );
		add_action( 'woocommerce_update_options_woolist', [ $this, 'save_settings' ] );

		// Test connection admin-post handler.
		add_action( 'admin_post_woolist_test_connection', [ $this, 'handle_test_connection' ] );

		// Order page meta box — use screen-specific hooks so both classic and
		// HPOS order edit pages are reliably targeted.
		add_action( 'add_meta_boxes_shop_order', [ $this, 'register_meta_box' ] );
		add_action( 'add_meta_boxes_woocommerce_page_wc-orders', [ $this, 'register_meta_box' ] );

		// WooCommerce Order Actions dropdown (works with classic + HPOS).
		add_filter( 'woocommerce_order_actions', [ $this, 'add_order_actions' ] );
		// Register one action handler per configured list (list IDs from options).
		$this->register_order_action_handlers();

		// AJAX handler for the manual-subscribe meta box button.
		add_action( 'wp_ajax_woolist_manual_subscribe', [ $this, 'handle_manual_subscribe' ] );

		// Admin assets.
		add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_admin_assets' ] );
	}

	// ── Settings tab ─────────────────────────────────────────────────────────

	public function add_settings_tab( array $tabs ): array {
		$tabs['woolist'] = __( 'phpList', 'woolist-phplist' );
		return $tabs;
	}

	public function render_settings(): void {
		woocommerce_admin_fields( $this->get_settings() );
		$this->render_test_connection_button();
	}

	public function save_settings(): void {
		woocommerce_update_options( $this->get_settings() );
	}

	private function render_test_connection_button(): void {
		$action_url = wp_nonce_url(
			admin_url( 'admin-post.php?action=woolist_test_connection' ),
			'woolist_test_connection'
		);

		$notice = get_transient( 'woolist_test_connection_notice_' . get_current_user_id() );
		if ( $notice ) {
			delete_transient( 'woolist_test_connection_notice_' . get_current_user_id() );
			$type = $notice['success'] ? 'updated' : 'error';
			printf(
				'<div class="notice notice-%s inline"><p>%s</p></div>',
				esc_attr( $type ),
				esc_html( $notice['message'] )
			);
		}

		echo '<p><a href="' . esc_url( $action_url ) . '" class="button button-secondary">'
			. esc_html__( 'Test Connection', 'woolist-phplist' )
			. '</a>';
		echo ' <span style="color:#646970;font-size:13px;margin-left:8px;">'
			. esc_html__( 'Check WooCommerce → Status → Logs (source: woolist-phplist) to see results.', 'woolist-phplist' )
			. '</span></p>';
	}

	public function handle_test_connection(): void {
		check_admin_referer( 'woolist_test_connection' );

		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_die( esc_html__( 'You do not have permission to perform this action.', 'woolist-phplist' ) );
		}

		WooList_Logger::info( 'Test Connection triggered by user ID ' . get_current_user_id() );

		$result  = $this->api->lists_get();
		$user_id = get_current_user_id();

		if ( is_wp_error( $result ) ) {
			WooList_Logger::error( 'Test Connection failed: ' . $result->get_error_message() );
			set_transient(
				'woolist_test_connection_notice_' . $user_id,
				[
					'success' => false,
					'message' => __( 'Connection failed: ', 'woolist-phplist' ) . $result->get_error_message(),
				],
				60
			);
		} else {
			$count = is_array( $result ) ? count( $result ) : '?';
			WooList_Logger::info( 'Test Connection succeeded. Found ' . $count . ' list(s).' );
			set_transient(
				'woolist_test_connection_notice_' . $user_id,
				[
					'success' => true,
					'message' => sprintf(
						/* translators: %d: number of lists found */
						__( 'Connection successful! Found %d list(s) in phpList.', 'woolist-phplist' ),
						$count
					),
				],
				60
			);
		}

		wp_safe_redirect( admin_url( 'admin.php?page=wc-settings&tab=woolist' ) );
		exit;
	}

	// ── Order page meta box ───────────────────────────────────────────────────

	/**
	 * Called by add_meta_boxes_shop_order and add_meta_boxes_woocommerce_page_wc-orders.
	 * The $post_or_order argument is passed by WC but not needed here.
	 */
	public function register_meta_box( $post_or_order = null ): void {
		// Determine the correct screen ID from the current hook name.
		$screen = did_action( 'add_meta_boxes_shop_order' )
			? 'shop_order'
			: 'woocommerce_page_wc-orders';

		add_meta_box(
			'woolist_order_metabox',
			__( 'phpList Sync', 'woolist-phplist' ),
			[ $this, 'render_order_meta_box' ],
			$screen,
			'side',
			'default'
		);
	}

	// ── WooCommerce Order Actions dropdown ────────────────────────────────────

	/**
	 * Inject a "phpList: …" entry for each configured list into the
	 * WooCommerce Order Actions dropdown (the select in the order sidebar).
	 *
	 * @param array $actions Existing order actions.
	 * @return array
	 */
	public function add_order_actions( array $actions ): array {
		foreach ( $this->get_configured_lists() as $list_id => $label ) {
			$actions[ 'woolist_sync_' . $list_id ] = sprintf(
				/* translators: %s: list label e.g. "Completed Orders" */
				__( 'phpList: Add to %s list', 'woolist-phplist' ),
				$label
			);
		}
		return $actions;
	}

	/**
	 * Register a woocommerce_order_action_{slug} handler for every
	 * configured list at init time so WooCommerce can call them.
	 */
	private function register_order_action_handlers(): void {
		foreach ( $this->get_configured_lists() as $list_id => $label ) {
			$list_id_captured = $list_id; // explicit capture for the closure
			add_action(
				'woocommerce_order_action_woolist_sync_' . $list_id,
				function ( $order ) use ( $list_id_captured ) {
					$this->do_sync( $order, $list_id_captured );
				}
			);
		}
	}

	/**
	 * Shared subscribe logic used by both the Order Action and the meta box AJAX.
	 *
	 * @param WC_Abstract_Order $order   The order.
	 * @param int               $list_id Target phpList list ID.
	 * @return bool True on success.
	 */
	private function do_sync( WC_Abstract_Order $order, int $list_id ): bool {
		$email    = $order->get_billing_email();
		$order_id = $order->get_id();

		if ( ! is_email( $email ) ) {
			WooList_Logger::error( 'do_sync: order #' . $order_id . ' has no valid billing email.' );
			return false;
		}

		WooList_Logger::info( 'do_sync: order #' . $order_id . '  email=' . $email . '  list_id=' . $list_id );
		$result = $this->api->subscribe_email_to_list( $email, $list_id );

		if ( $result['success'] ) {
			// Add a visible note on the order so it's traceable in the order timeline.
			$order->add_order_note( sprintf(
				/* translators: 1: email, 2: list ID */
				__( 'WooList: %1$s added to phpList list %2$d.', 'woolist-phplist' ),
				$email,
				$list_id
			) );
			return true;
		}

		$order->add_order_note( sprintf(
			/* translators: 1: email, 2: list ID */
			__( 'WooList: failed to add %1$s to phpList list %2$d. Check WooCommerce → Status → Logs.', 'woolist-phplist' ),
			$email,
			$list_id
		) );
		return false;
	}

	/**
	 * Render the "Add to phpList" meta box on the order edit page.
	 *
	 * @param WP_Post|WC_Abstract_Order $post_or_order Classic WP_Post or HPOS order object.
	 */
	public function render_order_meta_box( $post_or_order ): void {
		// Normalise to a WC order object regardless of storage mode.
		if ( $post_or_order instanceof WC_Abstract_Order ) {
			$order = $post_or_order;
		} else {
			$order = wc_get_order( $post_or_order->ID );
		}

		if ( ! $order ) {
			echo '<p>' . esc_html__( 'Could not load order.', 'woolist-phplist' ) . '</p>';
			return;
		}

		$order_id = $order->get_id();
		$email    = $order->get_billing_email();

		// Build list of configured lists so the admin can pick one.
		$lists = $this->get_configured_lists();

		if ( empty( $lists ) ) {
			echo '<p style="color:#d63638;">'
				. esc_html__( 'No phpList lists are configured yet. Add list IDs under WooCommerce → Settings → phpList.', 'woolist-phplist' )
				. '</p>';
			return;
		}

		$nonce = wp_create_nonce( 'woolist_manual_subscribe_' . $order_id );
		?>
		<div class="woolist-metabox-wrap">
			<p style="margin:0 0 8px;">
				<strong><?php esc_html_e( 'Email:', 'woolist-phplist' ); ?></strong>
				<?php echo esc_html( $email ?: __( '(none)', 'woolist-phplist' ) ); ?>
			</p>

			<p style="margin:0 0 6px;">
				<label for="woolist-list-select-<?php echo esc_attr( $order_id ); ?>" style="display:block;margin-bottom:4px;font-weight:600;">
					<?php esc_html_e( 'Target list:', 'woolist-phplist' ); ?>
				</label>
				<select id="woolist-list-select-<?php echo esc_attr( $order_id ); ?>"
				        class="woolist-list-select"
				        style="width:100%;">
					<?php foreach ( $lists as $list_id => $label ) : ?>
						<option value="<?php echo esc_attr( $list_id ); ?>">
							<?php echo esc_html( $label . ' (ID: ' . $list_id . ')' ); ?>
						</option>
					<?php endforeach; ?>
				</select>
			</p>

			<button type="button"
			        class="button woolist-manual-subscribe-btn"
			        style="width:100%;margin-top:4px;"
			        data-order-id="<?php echo esc_attr( $order_id ); ?>"
			        data-nonce="<?php echo esc_attr( $nonce ); ?>">
				<?php esc_html_e( 'Add to phpList', 'woolist-phplist' ); ?>
			</button>

			<div class="woolist-metabox-response" style="display:none;margin-top:8px;padding:6px 8px;border-radius:3px;font-size:13px;"></div>
		</div>
		<?php
	}

	/**
	 * Build an associative array of [ list_id => human label ] for all lists
	 * that have an ID configured in settings, regardless of whether sync is enabled.
	 *
	 * @return array<int, string>
	 */
	private function get_configured_lists(): array {
		$map = [
			(int) get_option( 'woolist_completed_list_id', 0 )  => __( 'Completed Orders', 'woolist-phplist' ),
			(int) get_option( 'woolist_cancelled_list_id', 0 )  => __( 'Cancelled Orders', 'woolist-phplist' ),
			(int) get_option( 'woolist_signup_list_id', 0 )     => __( 'Account Signup', 'woolist-phplist' ),
			(int) get_option( 'woolist_newsletter_list_id', 0 ) => __( 'Newsletter', 'woolist-phplist' ),
		];

		// Remove entries where no list ID has been set.
		unset( $map[0] );

		return $map;
	}

	/**
	 * AJAX handler for the "Add to phpList" order meta box button.
	 */
	public function handle_manual_subscribe(): void {
		$order_id = (int) ( $_POST['order_id'] ?? 0 );

		if ( ! check_ajax_referer( 'woolist_manual_subscribe_' . $order_id, 'nonce', false ) ) {
			wp_send_json_error( [ 'message' => __( 'Security check failed.', 'woolist-phplist' ) ], 403 );
		}

		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_send_json_error( [ 'message' => __( 'Permission denied.', 'woolist-phplist' ) ], 403 );
		}

		$list_id = (int) ( $_POST['list_id'] ?? 0 );
		if ( $list_id < 1 ) {
			wp_send_json_error( [ 'message' => __( 'No list selected.', 'woolist-phplist' ) ] );
		}

		$order = wc_get_order( $order_id );
		if ( ! $order ) {
			wp_send_json_error( [ 'message' => __( 'Order not found.', 'woolist-phplist' ) ] );
		}

		WooList_Logger::info( 'Meta box manual subscribe: order #' . $order_id . '  list_id=' . $list_id . '  user#' . get_current_user_id() );

		$ok = $this->do_sync( $order, $list_id );

		if ( ! $ok ) {
			wp_send_json_error( [
				'message' => __( 'Subscription failed. Check WooCommerce → Status → Logs for details.', 'woolist-phplist' ),
			] );
		}

		wp_send_json_success( [
			'message' => sprintf(
				/* translators: 1: email address, 2: list ID */
				__( '%1$s added to list %2$d.', 'woolist-phplist' ),
				esc_html( $order->get_billing_email() ),
				$list_id
			),
		] );
	}

	// ── Admin assets ─────────────────────────────────────────────────────────

	public function enqueue_admin_assets(): void {
		$screen = get_current_screen();
		if ( ! $screen ) {
			return;
		}

		// Enqueue button JS on both classic and HPOS order edit screens.
		if ( in_array( $screen->id, [ 'shop_order', 'woocommerce_page_wc-orders' ], true ) ) {
			wp_enqueue_script(
				'woolist-admin',
				WOOLIST_URL . 'assets/js/woolist-admin.js',
				[ 'jquery' ],
				WOOLIST_VERSION,
				true
			);

			// Inline styles for the meta box response area.
			wp_add_inline_style(
				'woocommerce_admin_styles',
				'.woolist-mb-success{background:#edfaf1;color:#2d6a0f;border:1px solid #52c41a;}'
				. '.woolist-mb-error{background:#fff1f0;color:#a8071a;border:1px solid #ff4d4f;}'
			);
		}
	}

	// ── Settings definitions ─────────────────────────────────────────────────

	private function get_settings(): array {
		return [
			// ── Section 1: Connection ────────────────────────────────────────
			[
				'title' => __( 'phpList Connection', 'woolist-phplist' ),
				'type'  => 'title',
				'id'    => 'woolist_section_connection',
			],
			[
				'title'    => __( 'phpList Base URL', 'woolist-phplist' ),
				'desc'     => __( 'e.g. https://newsletter.example.com', 'woolist-phplist' ),
				'id'       => 'woolist_phplist_url',
				'type'     => 'text',
				'default'  => '',
				'desc_tip' => true,
			],
			[
				'title'    => __( 'Login', 'woolist-phplist' ),
				'desc'     => __( 'phpList admin username.', 'woolist-phplist' ),
				'id'       => 'woolist_phplist_login',
				'type'     => 'text',
				'default'  => '',
				'desc_tip' => true,
			],
			[
				'title'    => __( 'Password', 'woolist-phplist' ),
				'desc'     => __( 'phpList admin password.', 'woolist-phplist' ),
				'id'       => 'woolist_phplist_password',
				'type'     => 'password',
				'default'  => '',
				'desc_tip' => true,
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_connection',
			],

			// ── Section 2: Completed Orders ──────────────────────────────────
			[
				'title' => __( 'Completed Orders', 'woolist-phplist' ),
				'type'  => 'title',
				'id'    => 'woolist_section_completed',
			],
			[
				'title'   => __( 'Enable sync', 'woolist-phplist' ),
				'desc'    => __( 'Subscribe customers to phpList when an order is completed.', 'woolist-phplist' ),
				'id'      => 'woolist_sync_completed',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'title'             => __( 'List ID', 'woolist-phplist' ),
				'desc'              => __( 'phpList list ID to subscribe completed-order customers to.', 'woolist-phplist' ),
				'id'                => 'woolist_completed_list_id',
				'type'              => 'number',
				'default'           => '',
				'custom_attributes' => [ 'min' => '1' ],
				'desc_tip'          => true,
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_completed',
			],

			// ── Section 3: Cancelled Orders ──────────────────────────────────
			[
				'title' => __( 'Cancelled Orders', 'woolist-phplist' ),
				'type'  => 'title',
				'id'    => 'woolist_section_cancelled',
			],
			[
				'title'   => __( 'Enable sync', 'woolist-phplist' ),
				'desc'    => __( 'Subscribe customers to phpList when an order is cancelled.', 'woolist-phplist' ),
				'id'      => 'woolist_sync_cancelled',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'title'             => __( 'List ID', 'woolist-phplist' ),
				'desc'              => __( 'phpList list ID to subscribe cancelled-order customers to.', 'woolist-phplist' ),
				'id'                => 'woolist_cancelled_list_id',
				'type'              => 'number',
				'default'           => '',
				'custom_attributes' => [ 'min' => '1' ],
				'desc_tip'          => true,
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_cancelled',
			],

			// ── Section 4: Account Signup ────────────────────────────────────
			[
				'title' => __( 'Account Signup', 'woolist-phplist' ),
				'type'  => 'title',
				'id'    => 'woolist_section_signup',
			],
			[
				'title'   => __( 'Enable sync', 'woolist-phplist' ),
				'desc'    => __( 'Subscribe new WordPress users to phpList when they register.', 'woolist-phplist' ),
				'id'      => 'woolist_sync_signup',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'title'             => __( 'List ID', 'woolist-phplist' ),
				'desc'              => __( 'phpList list ID for new account signups.', 'woolist-phplist' ),
				'id'                => 'woolist_signup_list_id',
				'type'              => 'number',
				'default'           => '',
				'custom_attributes' => [ 'min' => '1' ],
				'desc_tip'          => true,
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_signup',
			],

			// ── Section 5: Newsletter Shortcode ──────────────────────────────
			[
				'title' => __( 'Newsletter Shortcode', 'woolist-phplist' ),
				'type'  => 'title',
				'desc'  => __( 'Settings for the [woolist_newsletter] shortcode.', 'woolist-phplist' ),
				'id'    => 'woolist_section_newsletter',
			],
			[
				'title'   => __( 'Enable sync', 'woolist-phplist' ),
				'desc'    => __( 'Enable the [woolist_newsletter] shortcode.', 'woolist-phplist' ),
				'id'      => 'woolist_sync_newsletter',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'title'             => __( 'List ID', 'woolist-phplist' ),
				'desc'              => __( 'phpList list ID for newsletter shortcode subscribers.', 'woolist-phplist' ),
				'id'                => 'woolist_newsletter_list_id',
				'type'              => 'number',
				'default'           => '',
				'custom_attributes' => [ 'min' => '1' ],
				'desc_tip'          => true,
			],
			[
				'title'   => __( 'Enable incentive coupon', 'woolist-phplist' ),
				'desc'    => __( 'Send a WooCommerce coupon after newsletter signup.', 'woolist-phplist' ),
				'id'      => 'woolist_newsletter_enable_coupon',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'title'   => __( 'Coupon mode', 'woolist-phplist' ),
				'desc'    => __( 'Choose how the coupon is provided.', 'woolist-phplist' ),
				'id'      => 'woolist_coupon_mode',
				'type'    => 'select',
				'default' => 'fixed',
				'options' => [
					'fixed'        => __( 'Fixed code', 'woolist-phplist' ),
					'autogenerate' => __( 'Auto-generate unique code', 'woolist-phplist' ),
				],
				'desc_tip' => true,
			],
			[
				'title'    => __( 'Fixed coupon code', 'woolist-phplist' ),
				'desc'     => __( 'The coupon code to show when mode is set to "Fixed code".', 'woolist-phplist' ),
				'id'       => 'woolist_coupon_fixed_code',
				'type'     => 'text',
				'default'  => '',
				'desc_tip' => true,
			],
			[
				'title'             => __( 'Discount (%)', 'woolist-phplist' ),
				'desc'              => __( 'Percentage discount for auto-generated coupons.', 'woolist-phplist' ),
				'id'                => 'woolist_coupon_discount_pct',
				'type'              => 'number',
				'default'           => '10',
				'custom_attributes' => [ 'min' => '1', 'max' => '100' ],
				'desc_tip'          => true,
			],
			[
				'title'             => __( 'Expiry (days)', 'woolist-phplist' ),
				'desc'              => __( 'Days until auto-generated coupon expires. Use 0 for no expiry.', 'woolist-phplist' ),
				'id'                => 'woolist_coupon_expiry_days',
				'type'              => 'number',
				'default'           => '30',
				'custom_attributes' => [ 'min' => '0' ],
				'desc_tip'          => true,
			],
			[
				'title'    => __( 'Thank-you message', 'woolist-phplist' ),
				'desc'     => __( 'Message shown after signup. Use {coupon} as a placeholder for the coupon code.', 'woolist-phplist' ),
				'id'       => 'woolist_newsletter_thankyou',
				'type'     => 'textarea',
				'default'  => __( 'Thank you for subscribing! Use coupon {coupon} for 10% off your first order.', 'woolist-phplist' ),
				'css'      => 'width:100%;height:80px;',
				'desc_tip' => true,
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_newsletter',
			],

			// ── Section 6: Logging ───────────────────────────────────────────
			[
				'title' => __( 'Logging', 'woolist-phplist' ),
				'type'  => 'title',
				'desc'  => __( 'Logs are written to WooCommerce → Status → Logs (source: woolist-phplist).', 'woolist-phplist' ),
				'id'    => 'woolist_section_logging',
			],
			[
				'title'   => __( 'Enable debug logging', 'woolist-phplist' ),
				'desc'    => __( 'Log full API request URLs (password redacted) and raw responses. Useful for diagnosing API issues; disable on production once confirmed working.', 'woolist-phplist' ),
				'id'      => 'woolist_enable_debug_log',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_logging',
			],
		];
	}
}