<?php
/**
 * WooCommerce Settings tab for WooList — phpList Integration.
 *
 * @package WooList
 */

defined( 'ABSPATH' ) || exit;

class WooList_Admin {

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

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

		// Register the custom 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' ] );

		// Clear log admin-post handler.
		add_action( 'admin_post_woolist_clear_log', [ $this, 'handle_clear_log' ] );

		// Enqueue admin JS/CSS only on the WC settings page.
		add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_admin_assets' ] );
	}

	/**
	 * Add "phpList" tab to WooCommerce → Settings.
	 *
	 * @param array $tabs Existing tabs.
	 * @return array
	 */
	public function add_settings_tab( array $tabs ): array {
		$tabs['woolist'] = __( 'phpList', 'woolist-phplist' );
		return $tabs;
	}

	/**
	 * Render the settings tab content.
	 */
	public function render_settings(): void {
		woocommerce_admin_fields( $this->get_settings() );
		$this->render_test_connection_button();
		$this->render_log_viewer();
	}

	/**
	 * Save settings when the form is submitted.
	 */
	public function save_settings(): void {
		woocommerce_update_options( $this->get_settings() );
	}

	/**
	 * Output the "Test Connection" button below the settings form.
	 */
	private function render_test_connection_button(): void {
		$action_url = wp_nonce_url(
			admin_url( 'admin-post.php?action=woolist_test_connection' ),
			'woolist_test_connection'
		);

		// Display any stored transient notice.
		$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></p>';
	}

	/**
	 * Render the log viewer panel below all settings.
	 */
	private function render_log_viewer(): void {
		$log_content = WooList_Logger::read_recent( 300 );
		$log_path    = WooList_Logger::get_log_path();
		$clear_url   = wp_nonce_url(
			admin_url( 'admin-post.php?action=woolist_clear_log' ),
			'woolist_clear_log'
		);

		$notice = get_transient( 'woolist_clear_log_notice_' . get_current_user_id() );
		if ( $notice ) {
			delete_transient( 'woolist_clear_log_notice_' . get_current_user_id() );
			echo '<div class="notice notice-success inline"><p>' . esc_html( $notice ) . '</p></div>';
		}

		echo '<hr style="margin:2em 0;">';
		echo '<h2>' . esc_html__( 'Activity Log', 'woolist-phplist' ) . '</h2>';
		echo '<p style="color:#646970;">';
		echo esc_html__( 'Log file: ', 'woolist-phplist' );
		echo '<code>' . esc_html( $log_path ) . '</code>';
		echo '</p>';

		if ( $log_content === '' ) {
			echo '<p><em>' . esc_html__( 'Log is empty.', 'woolist-phplist' ) . '</em></p>';
		} else {
			echo '<div style="position:relative;">';
			echo '<textarea readonly rows="20" style="width:100%;font-family:monospace;font-size:12px;background:#1e1e1e;color:#d4d4d4;padding:12px;border:1px solid #ccc;border-radius:4px;resize:vertical;white-space:pre;">'
				. esc_textarea( $log_content )
				. '</textarea>';
			echo '</div>';
		}

		echo '<p>';
		echo '<a href="' . esc_url( $clear_url ) . '" class="button button-secondary" '
			. 'onclick="return confirm(\'' . esc_js( __( 'Clear the entire log file?', 'woolist-phplist' ) ) . '\')">'
			. esc_html__( 'Clear Log', 'woolist-phplist' )
			. '</a>';
		echo '</p>';
	}

	/**
	 * Handle the "Test Connection" form action.
	 */
	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;
	}

	/**
	 * Handle the "Clear Log" admin-post action.
	 */
	public function handle_clear_log(): void {
		check_admin_referer( 'woolist_clear_log' );

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

		WooList_Logger::clear();
		WooList_Logger::info( 'Log cleared by user ID ' . get_current_user_id() );

		set_transient(
			'woolist_clear_log_notice_' . get_current_user_id(),
			__( 'Log file cleared.', 'woolist-phplist' ),
			60
		);

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

	/**
	 * Enqueue admin-side assets on WC Settings → phpList tab.
	 */
	public function enqueue_admin_assets(): void {
		$screen = get_current_screen();
		if ( ! $screen || strpos( $screen->id, 'woocommerce' ) === false ) {
			return;
		}
	}

	/**
	 * Build and return the WooCommerce settings field definitions.
	 *
	 * @return array
	 */
	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'  => __( 'Control what gets recorded in the activity log shown below.', 'woolist-phplist' ),
				'id'    => 'woolist_section_logging',
			],
			[
				'title'   => __( 'Enable debug logging', 'woolist-phplist' ),
				'desc'    => __( 'Log full API request URLs (password redacted) and raw responses. Disable on production once everything works.', 'woolist-phplist' ),
				'id'      => 'woolist_enable_debug_log',
				'type'    => 'checkbox',
				'default' => 'no',
			],
			[
				'type' => 'sectionend',
				'id'   => 'woolist_section_logging',
			],
		];
	}
}