<?php
/**
 * Settings page class
 *
 * @package Abilities_Bridge
 */

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

/**
 * Settings Page class.
 *
 * Handles the plugin settings page.
 *
 * @since 1.0.0
 */
class Abilities_Bridge_Settings_Page {

	/**
	 * Get the current admin page parameter for routing checks.
	 *
	 * This is used internally for routing logic only - it does not require
	 * nonce verification because it only checks the current page name
	 * (a WordPress-controlled parameter) for routing purposes.
	 *
	 * @return string The current page parameter value, or empty string.
	 */
	private function get_current_page() {
		$value = filter_input( INPUT_GET, 'page', FILTER_SANITIZE_FULL_SPECIAL_CHARS );
		return ! empty( $value ) ? sanitize_key( $value ) : '';
	}

	/**
	 * Verify the settings page nonce for URL parameters.
	 *
	 * Returns true if nonce is valid, false if no nonce present.
	 * Dies with error if nonce is present but invalid.
	 *
	 * @return bool True if nonce is valid, false if no nonce present.
	 */
	private function verify_settings_nonce() {
		$nonce = filter_input( INPUT_GET, '_wpnonce', FILTER_SANITIZE_FULL_SPECIAL_CHARS );

		// No nonce present = no URL parameters to process.
		if ( empty( $nonce ) ) {
			return false;
		}

		// Nonce present - verify it.
		if ( ! wp_verify_nonce( $nonce, 'abilities_bridge_settings_nav' ) ) {
			wp_die(
				esc_html__( 'Security verification failed. Please use the navigation links provided.', 'abilities-bridge' ),
				esc_html__( 'Security Check Failed', 'abilities-bridge' ),
				array( 'response' => 403 )
			);
		}

		return true;
	}

	/**
	 * Initialize the settings page
	 */
	public function init() {
		add_action( 'admin_init', array( $this, 'register_settings' ) );
		add_action( 'admin_init', array( $this, 'handle_mcp_actions' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) );
		add_action( 'wp_ajax_abilities_bridge_test_openai', array( $this, 'ajax_test_openai_connection' ) );
	}

	/**
	 * Enqueue CSS and JavaScript for settings page
	 *
	 * @param string $hook The current admin page hook.
	 */
	public function enqueue_assets( $hook ) {
		// Only load on settings page.
		// Hook format: {parent_slug}_page_{menu_slug}.
		if ( false === strpos( $hook, 'abilities-bridge-settings' ) ) {
			return;
		}

		$settings_css_version = filemtime( ABILITIES_BRIDGE_PLUGIN_DIR . 'admin/css/settings-page.css' );
		$settings_js_version  = filemtime( ABILITIES_BRIDGE_PLUGIN_DIR . 'admin/js/settings-page.js' );

		wp_enqueue_style(
			'abilities-bridge-settings-page',
			ABILITIES_BRIDGE_PLUGIN_URL . 'admin/css/settings-page.css',
			array(),
			$settings_css_version ? $settings_css_version : ABILITIES_BRIDGE_VERSION
		);

		wp_enqueue_script(
			'abilities-bridge-settings-page',
			ABILITIES_BRIDGE_PLUGIN_URL . 'admin/js/settings-page.js',
			array( 'jquery' ),
			$settings_js_version ? $settings_js_version : ABILITIES_BRIDGE_VERSION,
			true
		);

		wp_localize_script(
			'abilities-bridge-settings-page',
			'abilitiesBridgeSettings',
			array(
				'ajaxUrl'              => admin_url( 'admin-ajax.php' ),
				'nonce'               => wp_create_nonce( 'abilities_bridge_settings' ),
				'memoryConsentGiven'  => (bool) get_option( 'abilities_bridge_memory_consent', false ),
				'i18n'                => array(
					'copied'               => __( 'Copied!', 'abilities-bridge' ),
					'copyFailed'           => __( 'Failed to copy to clipboard', 'abilities-bridge' ),
					'restorePromptConfirm' => __( 'Are you sure you want to restore the default system prompt? Your customizations will be lost.', 'abilities-bridge' ),
					'openaiTestRunning'    => __( 'Testing OpenAI connection...', 'abilities-bridge' ),
					'openaiTestSuccess'    => __( 'OpenAI connection successful.', 'abilities-bridge' ),
					'openaiTestFailed'     => __( 'OpenAI test failed.', 'abilities-bridge' ),
					'openaiTestAjaxError'  => __( 'OpenAI test could not be completed. Please try again.', 'abilities-bridge' ),
				),
				'defaultSystemPrompt' => Abilities_Bridge_Claude_API::get_default_system_prompt(),
			)
		);
	}

	/**
	 * Register settings
	 */
	public function register_settings() {
		register_setting(
			'abilities_bridge_settings',
			'abilities_bridge_api_key',
			array(
				'type'              => 'string',
				'sanitize_callback' => 'sanitize_text_field',
				'default'           => '',
			)
		);

		register_setting(
			'abilities_bridge_settings',
			'abilities_bridge_openai_api_key',
			array(
				'type'              => 'string',
				'sanitize_callback' => 'sanitize_text_field',
				'default'           => '',
			)
		);

		register_setting(
			'abilities_bridge_settings',
			'abilities_bridge_enable_memory',
			array(
				'type'              => 'boolean',
				'sanitize_callback' => 'rest_sanitize_boolean',
				'default'           => false,
			)
		);

		register_setting(
			'abilities_bridge_settings',
			'abilities_bridge_memory_consent',
			array(
				'type'              => 'boolean',
				'sanitize_callback' => 'rest_sanitize_boolean',
				'default'           => false,
			)
		);

		add_settings_section(
			'abilities_bridge_api_section',
			__( 'AI Provider Configuration', 'abilities-bridge' ),
			array( $this, 'render_section' ),
			'abilities-bridge-settings'
		);

		add_settings_field(
			'abilities_bridge_api_key',
			__( 'Anthropic API Key', 'abilities-bridge' ),
			array( $this, 'render_api_key_field' ),
			'abilities-bridge-settings',
			'abilities_bridge_api_section'
		);

		add_settings_field(
			'abilities_bridge_openai_api_key',
			__( 'OpenAI API Key', 'abilities-bridge' ),
			array( $this, 'render_openai_api_key_field' ),
			'abilities-bridge-settings',
			'abilities_bridge_api_section'
		);

		// System Prompt setting.
		register_setting(
			'abilities_bridge_settings',
			'abilities_bridge_system_prompt',
			array(
				'type'              => 'string',
				'sanitize_callback' => 'wp_kses_post',
				'default'           => '',
			)
		);

		add_settings_section(
			'abilities_bridge_prompt_section',
			__( 'System Prompt', 'abilities-bridge' ),
			array( $this, 'render_prompt_section' ),
			'abilities-bridge-settings'
		);

		add_settings_field(
			'abilities_bridge_system_prompt',
			__( 'System Prompt', 'abilities-bridge' ),
			array( $this, 'render_system_prompt_field' ),
			'abilities-bridge-settings',
			'abilities_bridge_prompt_section'
		);

		// Memory settings (for separate Memory tab).
		// Memory tool settings.
		register_setting(
			'abilities_bridge_builtin_tools',
			'abilities_bridge_enable_memory',
			array(
				'type'              => 'boolean',
				'sanitize_callback' => 'rest_sanitize_boolean',
				'default'           => false,
			)
		);

		register_setting(
			'abilities_bridge_builtin_tools',
			'abilities_bridge_memory_consent',
			array(
				'type'              => 'boolean',
				'sanitize_callback' => array( $this, 'validate_memory_consent' ),
				'default'           => false,
			)
		);
	}

	/**
	 * Validate memory consent
	 *
	 * Ensures that if memory is being enabled, consent must be given.
	 *
	 * @param bool $value The consent value being saved.
	 * @return bool The validated consent value.
	 */
	public function validate_memory_consent( $value ) {
		// Sanitize the boolean value first.
		$value = rest_sanitize_boolean( $value );

		// Check if memory is being enabled (from POST data).
		// Settings API sanitize callbacks are called after nonce verification by options.php.
		$enable_memory_raw = filter_input( INPUT_POST, 'abilities_bridge_enable_memory', FILTER_SANITIZE_FULL_SPECIAL_CHARS );
		$enable_memory     = rest_sanitize_boolean( $enable_memory_raw );

		// If memory is enabled but consent is not given, show error and prevent enabling.
		if ( $enable_memory && ! $value ) {
			add_settings_error(
				'abilities_bridge_memory_consent',
				'memory_consent_required',
				__( 'You must check the consent box to enable the Memory Tool.', 'abilities-bridge' ),
				'error'
			);

			// Also prevent memory from being enabled by resetting it.
			update_option( 'abilities_bridge_enable_memory', false );

			// Return false to prevent consent from being saved as true.
			return false;
		}

		return $value;
	}

	/**
	 * Render section description
	 */
	public function render_section() {
		?>
		<p>
			<?php
			printf(
				wp_kses(
					/* translators: %s: Anthropic console URL */
					__( 'Enter your API keys below. You can get an Anthropic key from the <a href="%s" target="_blank">Anthropic Console</a>.', 'abilities-bridge' ),
					array(
						'a' => array(
							'href'   => array(),
							'target' => array(),
						),
					)
				),
				esc_url( 'https://console.anthropic.com/' )
			);
			?>
		</p>
		<?php
	}

	/**
	 * Render API key field
	 */
	public function render_api_key_field() {
		$api_key = get_option( 'abilities_bridge_api_key', '' );
		?>
		<input
			type="password"
			name="abilities_bridge_api_key"
			id="abilities_bridge_api_key"
			value="<?php echo esc_attr( $api_key ); ?>"
			class="regular-text"
			autocomplete="off"
		/>
		<p class="description">
			<?php esc_html_e( 'Your Anthropic API key (starts with "sk-ant-"). This will be stored securely in your database.', 'abilities-bridge' ); ?>
		</p>

		<!-- API Key Consent Checkboxes -->
		<div id="anthropic-api-key-consent-box" style="background: #fff3cd; border: 1px solid #ffc107; padding: 15px; margin: 15px 0; border-radius: 4px; display: none;">
			<h4 style="margin-top: 0; color: #856404;">⚠️ <?php esc_html_e( 'API Key Consent Required', 'abilities-bridge' ); ?></h4>
			<p style="margin-bottom: 15px;"><strong><?php esc_html_e( 'Before saving your API key, please confirm:', 'abilities-bridge' ); ?></strong></p>

			<label style="display: block; margin-bottom: 10px; cursor: pointer;">
				<input type="checkbox" id="consent-api-permissions" class="api-key-consent-checkbox" value="1">
				<?php esc_html_e( 'I understand this plugin provides AI access through memory and abilities I control, and I am responsible for configuring appropriate permission levels for my security needs. I assume all responsibility and risk for enabling AI access to my site.', 'abilities-bridge' ); ?>
			</label>

			<label style="display: block; margin-bottom: 0; cursor: pointer;">
				<input type="checkbox" id="consent-api-billing" class="api-key-consent-checkbox" value="1">
				<?php esc_html_e( 'I understand API costs are my responsibility and billed by my AI provider directly. The makers of this plugin are NOT responsible for API usage costs or billing.', 'abilities-bridge' ); ?>
			</label>
		</div>
		<?php
	}

	/**
	 * Render OpenAI API key field
	 */
	public function render_openai_api_key_field() {
		$api_key = get_option( 'abilities_bridge_openai_api_key', '' );
		$model   = Abilities_Bridge_AI_Provider::get_selected_model( Abilities_Bridge_AI_Provider::PROVIDER_OPENAI );
		?>
		<input
			type="password"
			name="abilities_bridge_openai_api_key"
			id="abilities_bridge_openai_api_key"
			value="<?php echo esc_attr( $api_key ); ?>"
			class="regular-text"
			autocomplete="off"
		/>
		<p class="description">
			<?php esc_html_e( 'Your OpenAI API key (starts with "sk-"). This will be stored securely in your database.', 'abilities-bridge' ); ?>
		</p>
		<p>
			<button type="button" class="button" id="abilities-bridge-test-openai">
				<?php esc_html_e( 'Test OpenAI Connection', 'abilities-bridge' ); ?>
			</button>
		</p>
		<div id="abilities-bridge-openai-test-result" class="notice inline" style="display: none; margin: 10px 0 0 0;"></div>
		<p class="description">
			<?php
			printf(
				/* translators: %s: selected model id */
				esc_html__( 'Current OpenAI model: %s', 'abilities-bridge' ),
				'<code>' . esc_html( $model ) . '</code>'
			);
			?>
		</p>

		<!-- API Key Consent Checkboxes -->
		<div id="openai-api-key-consent-box" style="background: #fff3cd; border: 1px solid #ffc107; padding: 15px; margin: 15px 0; border-radius: 4px; display: none;">
			<h4 style="margin-top: 0; color: #856404;">⚠️ <?php esc_html_e( 'API Key Consent Required', 'abilities-bridge' ); ?></h4>
			<p style="margin-bottom: 15px;"><strong><?php esc_html_e( 'Before saving your API key, please confirm:', 'abilities-bridge' ); ?></strong></p>

			<label style="display: block; margin-bottom: 10px; cursor: pointer;">
				<input type="checkbox" id="consent-openai-api-permissions" class="api-key-consent-checkbox-openai" value="1">
				<?php esc_html_e( 'I understand this plugin provides AI access through memory and abilities I control, and I am responsible for configuring appropriate permission levels for my security needs. I assume all responsibility and risk for enabling AI access to my site.', 'abilities-bridge' ); ?>
			</label>

			<label style="display: block; margin-bottom: 0; cursor: pointer;">
				<input type="checkbox" id="consent-openai-api-billing" class="api-key-consent-checkbox-openai" value="1">
				<?php esc_html_e( 'I understand API costs are my responsibility and billed by my AI provider directly. The makers of this plugin are NOT responsible for API usage costs or billing.', 'abilities-bridge' ); ?>
			</label>
		</div>
		<?php
	}

	/**
	 * AJAX: Test OpenAI API connection.
	 */
	public function ajax_test_openai_connection() {
		check_ajax_referer( 'abilities_bridge_settings', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Insufficient permissions.', 'abilities-bridge' ) ) );
		}

		$provider = Abilities_Bridge_AI_Provider::PROVIDER_OPENAI;
		$model    = Abilities_Bridge_AI_Provider::get_selected_model( $provider );

		if ( ! Abilities_Bridge_AI_Provider::has_api_key( $provider ) ) {
			wp_send_json_error(
				array(
					'code'    => 'no_api_key',
					'message' => __( 'OpenAI API key is not configured.', 'abilities-bridge' ),
					'model'   => $model,
				)
			);
		}

		$openai_client = Abilities_Bridge_AI_Provider::create_client( $provider );
		$result        = $openai_client->send_message(
			array(
				array(
					'role'    => 'user',
					'content' => 'Return exactly: OK',
				),
			),
			array(),
			32,
			$model
		);

		if ( is_wp_error( $result ) ) {
			$error_data = $result->get_error_data();
			wp_send_json_error(
				array(
					'code'         => $result->get_error_code(),
					'message'      => $result->get_error_message(),
					'model'        => $model,
					'provider'     => 'openai',
					'status'       => isset( $error_data['status'] ) ? intval( $error_data['status'] ) : null,
					'provider_msg' => isset( $error_data['provider_message'] ) ? sanitize_text_field( $error_data['provider_message'] ) : '',
				)
			);
		}

		wp_send_json_success(
			array(
				'message' => __( 'OpenAI test succeeded.', 'abilities-bridge' ),
				'model'   => $model,
			)
		);
	}

	/**
	 * Render system prompt section description
	 */
	public function render_prompt_section() {
		?>
		<p>
			<?php esc_html_e( 'Customize the system prompt that defines how the AI behaves and responds. This prompt is sent with every conversation.', 'abilities-bridge' ); ?>
		</p>
		<?php
	}

	/**
	 * Render system prompt textarea field
	 */
	public function render_system_prompt_field() {
		$system_prompt  = get_option( 'abilities_bridge_system_prompt', '' );
		$default_prompt = Abilities_Bridge_Claude_API::get_default_system_prompt();

		// Use default if empty.
		if ( empty( $system_prompt ) ) {
			$system_prompt = $default_prompt;
		}
		?>
		<textarea
			name="abilities_bridge_system_prompt"
			id="abilities_bridge_system_prompt"
			class="large-text code abilities-bridge-system-prompt"
			rows="20"
		><?php echo esc_textarea( $system_prompt ); ?></textarea>
		<p class="description">
			<?php esc_html_e( 'This prompt defines the AI behavior, available tools, and how it should interact with your WordPress site.', 'abilities-bridge' ); ?>
		</p>
		<p>
			<button type="button" class="button" id="abilities-bridge-restore-default-prompt">
				<?php esc_html_e( 'Restore Default Prompt', 'abilities-bridge' ); ?>
			</button>
		</p>
		<?php
	}

	/**
	 * Render memory section description
	 */
	public function render_memory_section() {
		?>
		<p>
			<?php esc_html_e( 'The Memory Tool allows the AI to store persistent notes and knowledge across conversations. Data is stored securely in the WordPress database.', 'abilities-bridge' ); ?>
		</p>
		<p style="color: #d63638;">
			<strong><?php esc_html_e( 'Important:', 'abilities-bridge' ); ?></strong>
			<?php esc_html_e( 'Enabling this feature allows the AI to store memory data in the database. These memories help the AI remember site context and maintain conversation history.', 'abilities-bridge' ); ?>
		</p>
		<?php
	}

	/**
	 * Render memory enable field
	 */
	public function render_memory_enable_field() {
		$enabled = get_option( 'abilities_bridge_enable_memory', false );
		$consent = get_option( 'abilities_bridge_memory_consent', false );
		?>
		<label for="abilities_bridge_enable_memory">
			<input
				type="checkbox"
				name="abilities_bridge_enable_memory"
				id="abilities_bridge_enable_memory"
				value="1"
				<?php checked( $enabled, true ); ?>
			/>
			<?php esc_html_e( 'Enable persistent memory across conversations', 'abilities-bridge' ); ?>
		</label>

		<div id="abilities_bridge_memory_consent_container" style="margin-top: 15px; <?php echo esc_attr( $enabled && ! $consent ? '' : 'display: none;' ); ?>">
			<div style="background: #fff3cd; border-left: 4px solid #ffc107; padding: 15px; margin: 10px 0;">
				<h4 style="margin-top: 0;"><?php esc_html_e( 'Memory Tool Consent Required', 'abilities-bridge' ); ?></h4>
				<p><strong><?php esc_html_e( 'Please read and understand:', 'abilities-bridge' ); ?></strong></p>
				<ul style="list-style: disc; margin-left: 20px;">
					<li><?php esc_html_e( 'The Memory Tool allows AI to create, modify, and delete memory records', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Memory data is stored securely in the WordPress database', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Memory content is limited to 1MB each, 50MB total', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Memory data helps AI remember site context across sessions', 'abilities-bridge' ); ?></li>
				</ul>
				<label for="abilities_bridge_memory_consent" style="display: block; margin-top: 15px;">
					<input
						type="checkbox"
						name="abilities_bridge_memory_consent"
						id="abilities_bridge_memory_consent"
						value="1"
						<?php checked( $consent, true ); ?>
					/>
					<strong><?php esc_html_e( 'I understand and accept that enabling the Memory Tool allows the AI to store memories in the WordPress database', 'abilities-bridge' ); ?></strong>
				</label>
			</div>
		</div>

		<p class="description">
			<?php
			printf(
				/* translators: %s: table name */
				esc_html__( 'Memory storage: %s', 'abilities-bridge' ),
				'<code>Database (abilities_bridge_memories table)</code>'
			);
			?>
		</p>
		<?php
	}

	/**
	 * Render Memory section
	 */
	public function render_builtin_tools_section() {
		// Get current settings.
		$enable_memory  = get_option( 'abilities_bridge_enable_memory', false );
		$memory_consent = get_option( 'abilities_bridge_memory_consent', false );
		?>
		<div class="card">
			<h2><?php esc_html_e( 'Memory', 'abilities-bridge' ); ?></h2>
			<p>
				<?php esc_html_e( 'Enable persistent memory storage for the AI to remember context across conversations.', 'abilities-bridge' ); ?>
			</p>

			<form method="post" action="options.php">
				<?php settings_fields( 'abilities_bridge_builtin_tools' ); ?>

				<table class="widefat" style="margin-top: 20px;">
					<thead>
						<tr>
							<th style="width: 200px;"><?php esc_html_e( 'Tool', 'abilities-bridge' ); ?></th>
							<th><?php esc_html_e( 'Description', 'abilities-bridge' ); ?></th>
							<th style="width: 100px; text-align: center;"><?php esc_html_e( 'Enabled', 'abilities-bridge' ); ?></th>
						</tr>
					</thead>
					<tbody>
						<!-- memory -->
						<tr>
							<td><strong><code>memory</code></strong></td>
							<td>
								<?php esc_html_e( 'Persistent storage for maintaining context across conversations. Can create, read, update, and delete memory entries in the database.', 'abilities-bridge' ); ?>
								<div style="margin-top: 10px; padding: 10px; background: #fff3cd; border-left: 4px solid #ffc107;">
									<strong style="color: #856404;"><?php esc_html_e( 'Important:', 'abilities-bridge' ); ?></strong>
									<?php esc_html_e( 'This tool allows memory data storage. Data is stored in the database and limited to 1MB each, 50MB total.', 'abilities-bridge' ); ?>
								</div>
							</td>
							<td style="text-align: center;">
								<input
									type="checkbox"
									name="abilities_bridge_enable_memory"
									id="abilities_bridge_enable_memory"
									value="1"
									<?php checked( $enable_memory, true ); ?>
								/>
							</td>
						</tr>
					</tbody>
				</table>

				<!-- Memory consent dialog (only shows when memory is enabled AND consent not yet given) -->
				<div id="abilities_bridge_memory_consent_container" style="margin-top: 20px; <?php echo ( $enable_memory && ! $memory_consent ) ? '' : 'display: none;'; ?>">
					<div style="background: #fff3cd; border-left: 4px solid #ffc107; padding: 15px;">
						<h3 style="margin-top: 0;"><?php esc_html_e( 'Memory Tool Consent Required', 'abilities-bridge' ); ?></h3>
						<p><strong><?php esc_html_e( 'Please read and understand:', 'abilities-bridge' ); ?></strong></p>
						<ul style="list-style: disc; margin-left: 20px;">
							<li><?php esc_html_e( 'The Memory Tool allows AI to create, modify, and delete memory records', 'abilities-bridge' ); ?></li>
							<li><?php esc_html_e( 'Memory data is stored securely in the WordPress database', 'abilities-bridge' ); ?></li>
							<li><?php esc_html_e( 'Memory content is limited to 1MB each, 50MB total', 'abilities-bridge' ); ?></li>
							<li><?php esc_html_e( 'Memory data helps AI remember site context across sessions', 'abilities-bridge' ); ?></li>
						</ul>
						<label for="abilities_bridge_memory_consent" style="display: block; margin-top: 15px;">
							<input
								type="checkbox"
								name="abilities_bridge_memory_consent"
								id="abilities_bridge_memory_consent"
								value="1"
								<?php checked( $memory_consent, true ); ?>
							/>
							<strong><?php esc_html_e( 'I understand and accept that enabling the Memory Tool allows the AI to store memories in the WordPress database', 'abilities-bridge' ); ?></strong>
						</label>
					</div>
				</div>

				<?php submit_button( __( 'Save Tool Settings', 'abilities-bridge' ) ); ?>
			</form>
		</div>
		<?php
	}

	/**
	 * Handle MCP-related POST actions
	 */
	public function handle_mcp_actions() {
		// Only process on settings page (read-only routing check).
		$page = $this->get_current_page();
		if ( 'abilities-bridge-settings' !== $page ) {
			return;
		}

		// Only process POST requests.
		$method = isset( $_SERVER['REQUEST_METHOD'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ) : '';
		if ( 'POST' !== $method ) {
			return;
		}

		// Verify capability BEFORE processing any POST data.
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die(
				esc_html__( 'You do not have sufficient permissions to perform this action.', 'abilities-bridge' ),
				esc_html__( 'Permission Denied', 'abilities-bridge' ),
				array( 'response' => 403 )
			);
		}

		// Check if nonce is present - if not, this isn't an MCP form submission.
		if ( ! isset( $_POST['_wpnonce'] ) ) {
			return;
		}

		// Handle OAuth credential generation.
		if ( isset( $_POST['generate_oauth'] ) ) {
			// Verify nonce BEFORE processing.
			if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['_wpnonce'] ) ), 'abilities_bridge_mcp_generate_oauth' ) ) {
				wp_die(
					esc_html__( 'Security token validation failed. Please refresh the page and try again.', 'abilities-bridge' ),
					esc_html__( 'Security Check Failed', 'abilities-bridge' ),
					array( 'response' => 403 )
				);
			}

			// Check if consent has been given.
			if ( ! Abilities_Bridge_Welcome_Wizard::is_setup_complete() ) {
				wp_die( esc_html__( 'You must complete the welcome wizard and provide consent before generating OAuth credentials.', 'abilities-bridge' ) );
			}

			$oauth       = new Abilities_Bridge_MCP_OAuth();
			$credentials = $oauth->generate_credentials();

			// Store in transient to display after redirect.
			set_transient( 'abilities_bridge_new_credentials', $credentials, 60 );

			// Redirect to avoid resubmission (include nonce for credentials-generated flag).
			// Note: wp_nonce_url() must NOT be used here — it calls esc_html() which
			// converts & to &amp;, breaking query parameters in the Location header.
			$redirect_url = add_query_arg(
				array(
					'credentials-generated' => '1',
					'tab'                   => 'mcp-setup',
					'_wpnonce'              => wp_create_nonce( 'abilities_bridge_settings_nav' ),
				),
				admin_url( 'admin.php?page=abilities-bridge-settings' )
			);
			wp_safe_redirect( $redirect_url );
			exit;
		}

		// Handle client revocation.
		if ( isset( $_POST['revoke_client'] ) ) {
			// Verify nonce BEFORE processing.
			if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['_wpnonce'] ) ), 'abilities_bridge_mcp_revoke_client' ) ) {
				wp_die(
					esc_html__( 'Security token validation failed. Please refresh the page and try again.', 'abilities-bridge' ),
					esc_html__( 'Security Check Failed', 'abilities-bridge' ),
					array( 'response' => 403 )
				);
			}

			$oauth = new Abilities_Bridge_MCP_OAuth();

			if ( ! isset( $_POST['client_id'] ) ) {
				wp_die( esc_html__( 'Missing client ID', 'abilities-bridge' ) );
			}

			$client_id = sanitize_text_field( wp_unslash( $_POST['client_id'] ) );

			if ( $oauth->revoke_client( $client_id ) ) {
				add_settings_error(
					'abilities_bridge_messages',
					'client_revoked',
					__( 'Client credentials revoked successfully.', 'abilities-bridge' ),
					'success'
				);
			} else {
				add_settings_error(
					'abilities_bridge_messages',
					'client_revoke_failed',
					__( 'Failed to revoke client credentials.', 'abilities-bridge' ),
					'error'
				);
			}

			// Redirect to avoid resubmission.
			wp_safe_redirect( admin_url( 'admin.php?page=abilities-bridge-settings' ) );
			exit;
		}
	}

	/**
	 * Render MCP section description and setup instructions.
	 */
	public function render_mcp_section() {
		// Get MCP endpoint URL.
		$mcp_endpoint = rest_url( 'abilities-bridge-mcp/v1/mcp' );

		// Check for existing OAuth credentials.
		$oauth            = new Abilities_Bridge_MCP_OAuth();
		$existing_clients = $oauth->get_user_clients();

		// Check for newly generated credentials (from transient after redirect).
		// Verify nonce before accessing the credentials-generated URL parameter.
		$generated_client_id     = null;
		$generated_client_secret = null;
		$show_credentials        = false;

		// Only check credentials-generated if nonce is valid.
		if ( $this->verify_settings_nonce() ) {
			$credentials_flag = filter_input( INPUT_GET, 'credentials-generated', FILTER_SANITIZE_FULL_SPECIAL_CHARS );
			$show_credentials = ! empty( $credentials_flag );
		}

		if ( $show_credentials ) {
			$credentials = get_transient( 'abilities_bridge_new_credentials' );
			if ( $credentials ) {
				$generated_client_id     = $credentials['client_id'];
				$generated_client_secret = $credentials['client_secret'];
				delete_transient( 'abilities_bridge_new_credentials' );
			}
		}

		?>
		<div class="card" style="max-width: 100%; margin-top: 20px;">
			<h2><?php esc_html_e( 'MCP Server Setup', 'abilities-bridge' ); ?></h2>
			<p>
				<?php esc_html_e( 'Connect this WordPress site to Claude Desktop using the Model Context Protocol (MCP). This creates a remote connector that runs on your WordPress server.', 'abilities-bridge' ); ?>
			</p>

		<?php if ( ! is_ssl() ) : ?>
		<div class="notice notice-error inline">
			<p>
				<strong><?php esc_html_e( 'HTTPS Required:', 'abilities-bridge' ); ?></strong>
				<?php esc_html_e( 'Remote MCP connectors require HTTPS. Please enable SSL on your WordPress site.', 'abilities-bridge' ); ?>
			</p>
		</div>
		<?php endif; ?>

			<h3><?php esc_html_e( 'MCP Connector Setup', 'abilities-bridge' ); ?></h3>

			<div style="background: #d1f0d1; border-left: 4px solid #46b450; padding: 15px; margin: 15px 0;">
				<h4 style="margin-top: 0;"><?php esc_html_e( 'Step 1: Generate Client Credentials', 'abilities-bridge' ); ?></h4>

				<?php if ( isset( $generated_client_id ) && isset( $generated_client_secret ) ) : ?>
					<!-- Security Warning Banner -->
					<div class="notice notice-warning inline" style="margin: 15px 0; padding: 15px; border-left-width: 4px;">
						<p style="margin: 0;">
							<strong style="font-size: 14px;">⚠️ SECURITY NOTICE: ONE-TIME VIEW</strong><br>
							<span style="font-size: 13px;">
								<?php esc_html_e( 'These credentials are shown ONE TIME ONLY and cannot be viewed again. Copy them immediately and store them securely.', 'abilities-bridge' ); ?>
								<?php esc_html_e( 'If you lose them, you must revoke and generate new credentials.', 'abilities-bridge' ); ?>
							</span>
						</p>
					</div>

					<div id="generated-credentials" data-one-time-view="true" style="background: #fff; border: 2px solid #46b450; padding: 15px; margin: 10px 0;">
						<p><strong><?php esc_html_e( 'Your OAuth 2.0 Credentials:', 'abilities-bridge' ); ?></strong></p>

						<p style="margin-top: 15px;"><strong><?php esc_html_e( 'Client ID:', 'abilities-bridge' ); ?></strong></p>
						<code id="mcp-client-id" style="display: block; padding: 10px; background: #f0f0f0; word-break: break-all;">
							<?php echo esc_html( $generated_client_id ); ?>
						</code>
						<button type="button" class="button button-small mcp-copy-btn" data-copy-target="mcp-client-id" style="margin-top: 5px;">
							<?php esc_html_e( 'Copy Client ID', 'abilities-bridge' ); ?>
						</button>

						<p style="margin-top: 15px;"><strong><?php esc_html_e( 'Client Secret:', 'abilities-bridge' ); ?></strong></p>
						<code id="mcp-client-secret" style="display: block; padding: 10px; background: #f0f0f0; word-break: break-all;">
							<?php echo esc_html( $generated_client_secret ); ?>
						</code>
						<button type="button" class="button button-small mcp-copy-btn" data-copy-target="mcp-client-secret" style="margin-top: 5px;">
							<?php esc_html_e( 'Copy Client Secret', 'abilities-bridge' ); ?>
						</button>
					</div>
				<?php else : ?>
					<form method="post" action="<?php echo esc_url( admin_url( 'admin.php?page=abilities-bridge-settings' ) ); ?>">
						<?php wp_nonce_field( 'abilities_bridge_mcp_generate_oauth' ); ?>
						<input type="hidden" name="generate_oauth" value="1">
						<p>
							<button type="submit" class="button button-primary">
								<?php esc_html_e( 'Generate New Client Credentials', 'abilities-bridge' ); ?>
							</button>
						</p>
					</form>
				<?php endif; ?>

				<?php if ( ! empty( $existing_clients ) ) : ?>
					<p class="description">
						<?php
						printf(
							/* translators: %d: number of active clients */
							esc_html( _n( 'You have %d active client.', 'You have %d active clients.', count( $existing_clients ), 'abilities-bridge' ) ),
							count( $existing_clients )
						);
						?>
					</p>
				<?php endif; ?>
			</div>

			<div style="background: #f0f6fc; border-left: 4px solid #0073aa; padding: 15px; margin: 15px 0;">
				<h4 style="margin-top: 0;"><?php esc_html_e( 'Step 2: Remote MCP Server URL', 'abilities-bridge' ); ?></h4>
				<p><?php esc_html_e( 'Use this URL to connect from Claude Desktop:', 'abilities-bridge' ); ?></p>
				<code id="mcp-endpoint-url" style="display: block; padding: 10px; background: #fff; border: 1px solid #ddd;">
					<?php echo esc_url( $mcp_endpoint ); ?>
				</code>
				<button type="button" class="button button-small mcp-copy-btn" data-copy-target="mcp-endpoint-url" style="margin-top: 10px;">
					<?php esc_html_e( 'Copy URL', 'abilities-bridge' ); ?>
				</button>
			</div>

			<div style="background: #f0f6fc; border-left: 4px solid #0073aa; padding: 15px; margin: 15px 0;">
				<h4 style="margin-top: 0;"><?php esc_html_e( 'Step 3: Add to Claude Desktop', 'abilities-bridge' ); ?></h4>

				<p><strong><?php esc_html_e( 'Method A: Using Claude Desktop GUI (Recommended):', 'abilities-bridge' ); ?></strong></p>
				<ol style="margin-left: 20px;">
					<li><?php esc_html_e( 'Open Claude Desktop → Settings → Connectors', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Click "Add custom connector"', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Fill in the form:', 'abilities-bridge' ); ?>
						<ul style="list-style: disc; margin-left: 20px; margin-top: 5px;">
							<li><strong><?php esc_html_e( 'Name:', 'abilities-bridge' ); ?></strong> <?php esc_html_e( 'WordPress (or any name you prefer)', 'abilities-bridge' ); ?></li>
							<li><strong><?php esc_html_e( 'Remote MCP server URL:', 'abilities-bridge' ); ?></strong> <?php esc_html_e( 'Paste the URL from Step 2 above', 'abilities-bridge' ); ?></li>
							<li><strong><?php esc_html_e( 'OAuth Client ID:', 'abilities-bridge' ); ?></strong> <?php esc_html_e( 'Paste your Client ID from Step 1', 'abilities-bridge' ); ?></li>
							<li><strong><?php esc_html_e( 'OAuth Client Secret:', 'abilities-bridge' ); ?></strong> <?php esc_html_e( 'Paste your Client Secret from Step 1', 'abilities-bridge' ); ?></li>
						</ul>
					</li>
					<li><?php esc_html_e( 'Click "Add connector"', 'abilities-bridge' ); ?></li>
				</ol>
				<p style="padding: 10px; background: #e7f3ff; border-left: 4px solid #2196f3; margin-top: 10px;">
					<strong><?php esc_html_e( 'Note:', 'abilities-bridge' ); ?></strong>
					<?php esc_html_e( 'Claude Desktop will automatically exchange your credentials for access tokens and handle token refresh in the background.', 'abilities-bridge' ); ?>
				</p>

			</div>

			<div style="background: #d1f0d1; border-left: 4px solid #46b450; padding: 15px; margin: 15px 0;">
				<h4 style="margin-top: 0;"><?php esc_html_e( 'Step 4: Connect and Authorize', 'abilities-bridge' ); ?></h4>
				<p><?php esc_html_e( 'In Claude, click the Connect button. You will be redirected to your website to authorize the connection, then redirected back to Claude where the connection should be successful.', 'abilities-bridge' ); ?></p>
			</div>

			<?php if ( ! empty( $existing_clients ) ) : ?>
				<h3 style="margin-top: 30px;"><?php esc_html_e( 'Manage Client Credentials', 'abilities-bridge' ); ?></h3>
				<p><?php esc_html_e( 'View and revoke your active OAuth client credentials.', 'abilities-bridge' ); ?></p>

				<table class="widefat" style="margin-top: 15px;">
					<thead>
						<tr>
							<th><?php esc_html_e( 'Client ID', 'abilities-bridge' ); ?></th>
							<th><?php esc_html_e( 'Created', 'abilities-bridge' ); ?></th>
							<th><?php esc_html_e( 'Actions', 'abilities-bridge' ); ?></th>
						</tr>
					</thead>
					<tbody>
						<?php foreach ( $existing_clients as $client ) : ?>
							<tr>
								<td><code><?php echo esc_html( $client['client_id'] ); ?></code></td>
								<td>
									<?php
									echo esc_html(
										wp_date(
											get_option( 'date_format' ) . ' ' . get_option( 'time_format' ),
											$client['created_at']
										)
									);
									?>
								</td>
								<td>
									<form method="post" action="<?php echo esc_url( admin_url( 'admin.php?page=abilities-bridge-settings' ) ); ?>" style="display: inline;">
										<?php wp_nonce_field( 'abilities_bridge_mcp_revoke_client' ); ?>
										<input type="hidden" name="client_id" value="<?php echo esc_attr( $client['client_id'] ); ?>">
										<input type="hidden" name="revoke_client" value="1">
										<button type="submit" class="button button-small button-link-delete" onclick="return confirm('<?php esc_attr_e( 'Are you sure you want to revoke this client? This will invalidate all tokens and the client will no longer be able to connect.', 'abilities-bridge' ); ?>');">
											<?php esc_html_e( 'Revoke', 'abilities-bridge' ); ?>
										</button>
									</form>
								</td>
							</tr>
						<?php endforeach; ?>
					</tbody>
				</table>
				<p class="description" style="margin-top: 10px;">
					<?php esc_html_e( 'Revoking a client will invalidate all associated access tokens and refresh tokens. You will need to generate new client credentials to reconnect.', 'abilities-bridge' ); ?>
				</p>
			<?php endif; ?>
		</div>
		<?php
	}

	/**
	 * Render the settings page
	 */
	public function render_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'abilities-bridge' ) );
		}

		// Check system requirements.
		$requirements = $this->check_requirements();

		// Determine which tab should be active (from URL param, defaults to 'general').
		$valid_tabs = array( 'general', 'memory', 'mcp-setup', 'about', 'pro', 'learn-more' );
		$active_tab = isset( $_GET['tab'] ) ? sanitize_text_field( wp_unslash( $_GET['tab'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( ! in_array( $active_tab, $valid_tabs, true ) ) {
			$active_tab = 'general';
		}

		?>
		<div class="wrap">
			<h1><?php echo esc_html( get_admin_page_title() ); ?></h1>

			<?php settings_errors(); ?>

			<!-- Tab Navigation -->
			<h2 class="nav-tab-wrapper abilities-bridge-settings-tabs">
				<?php foreach ( $valid_tabs as $tab_id ) : ?>
					<?php
					$tab_labels = array(
						'general'    => __( 'General', 'abilities-bridge' ),
						'memory'     => __( 'Memory', 'abilities-bridge' ),
						'mcp-setup'  => __( 'MCP Setup', 'abilities-bridge' ),
						'about'      => __( 'About', 'abilities-bridge' ),
						'pro'        => __( 'Pro Features', 'abilities-bridge' ),
						'learn-more' => __( 'Learn More', 'abilities-bridge' ),
					);
					$is_active  = ( $tab_id === $active_tab );
					$tab_class  = 'nav-tab' . ( $is_active ? ' nav-tab-active' : '' );
					$tab_style  = ( 'pro' === $tab_id ) ? ' style="color: #4CAF50; font-weight: 600;"' : '';
					?>
					<a href="#<?php echo esc_attr( $tab_id ); ?>" class="<?php echo esc_attr( $tab_class ); ?>" data-tab="<?php echo esc_attr( $tab_id ); ?>"<?php echo $tab_style; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>><?php echo esc_html( $tab_labels[ $tab_id ] ); ?></a>
				<?php endforeach; ?>
			</h2>

			<!-- General Tab -->
			<div class="abilities-bridge-tab-content" id="tab-general" style="display: <?php echo 'general' === $active_tab ? 'block' : 'none'; ?>;"><?php // phpcs:ignore ?>
				<div class="card">
				<h2><?php esc_html_e( 'System Requirements', 'abilities-bridge' ); ?></h2>
				<table class="widefat">
					<thead>
						<tr>
							<th><?php esc_html_e( 'Requirement', 'abilities-bridge' ); ?></th>
							<th><?php esc_html_e( 'Status', 'abilities-bridge' ); ?></th>
							<th><?php esc_html_e( 'Details', 'abilities-bridge' ); ?></th>
						</tr>
					</thead>
					<tbody>
						<?php foreach ( $requirements as $req ) : ?>
							<tr>
								<td><strong><?php echo esc_html( $req['name'] ); ?></strong></td>
								<td>
									<?php if ( $req['status'] ) : ?>
										<span style="color: green;">✓ <?php esc_html_e( 'OK', 'abilities-bridge' ); ?></span>
									<?php else : ?>
										<span style="color: red;">✗ <?php esc_html_e( 'Missing', 'abilities-bridge' ); ?></span>
									<?php endif; ?>
								</td>
								<td><?php echo esc_html( $req['details'] ); ?></td>
							</tr>
						<?php endforeach; ?>
					</tbody>
				</table>
			</div>

				<form method="post" action="options.php">
					<?php
					settings_fields( 'abilities_bridge_settings' );
					do_settings_sections( 'abilities-bridge-settings' );
					submit_button();
					?>
				</form>
			</div>

			<!-- Memory Tab -->
			<div class="abilities-bridge-tab-content" id="tab-memory" style="display: <?php echo 'memory' === $active_tab ? 'block' : 'none'; ?>;">
				<?php $this->render_builtin_tools_section(); ?>
			</div>

			<!-- MCP Setup Tab -->
			<div class="abilities-bridge-tab-content" id="tab-mcp-setup" style="display: <?php echo 'mcp-setup' === $active_tab ? 'block' : 'none'; ?>;">
				<?php $this->render_mcp_section(); ?>
			</div>

			<!-- About Tab -->
			<div class="abilities-bridge-tab-content" id="tab-about" style="display: <?php echo 'about' === $active_tab ? 'block' : 'none'; ?>;">

			<div class="card">
				<h2><?php esc_html_e( 'About Abilities Bridge', 'abilities-bridge' ); ?></h2>
				<p><strong><?php esc_html_e( 'Version:', 'abilities-bridge' ); ?></strong> <?php echo esc_html( ABILITIES_BRIDGE_VERSION ); ?></p>
				<p>
					<?php esc_html_e( 'Abilities Bridge connects AI to your WordPress site through two interfaces:', 'abilities-bridge' ); ?>
				</p>
				<ol style="margin-left: 20px; margin-bottom: 15px;">
					<li><strong><?php esc_html_e( 'Admin Chat Interface', 'abilities-bridge' ); ?></strong> - <?php esc_html_e( 'Built-in chat interface powered by Claude or OpenAI', 'abilities-bridge' ); ?></li>
					<li><strong><?php esc_html_e( 'MCP Integration', 'abilities-bridge' ); ?></strong> - <?php esc_html_e( 'Connect via MCP (Model Context Protocol) to use with Claude Code, Claude Desktop and other MCP integrations', 'abilities-bridge' ); ?></li>
				</ol>

				<p><strong><?php esc_html_e( 'Memory Tool (Optional)', 'abilities-bridge' ); ?></strong></p>
				<ul style="list-style: disc; margin-left: 20px; margin-bottom: 15px;">
					<li><?php esc_html_e( 'Store persistent notes and context across conversations in the WordPress database', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Requires explicit consent in Memory settings', 'abilities-bridge' ); ?></li>
				</ul>

				<p><strong><?php esc_html_e( 'Managed AI Abilities', 'abilities-bridge' ); ?></strong></p>
				<ul style="list-style: disc; margin-left: 20px; margin-bottom: 15px;">
					<li><?php esc_html_e( 'The Abilities API allows plugins to register AI-callable functions with comprehensive permission controls', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Each ability passes a 7-gate permission system: enable/disable toggle, daily rate limits, hourly rate limits, per-request limits, risk level classification, user approval requirements, and admin approval requirements', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'Site administrators can review and approve ability executions through the Ability Permissions tab', 'abilities-bridge' ); ?></li>
					<li><?php esc_html_e( 'All ability executions are logged with full input/output tracking and audit trails', 'abilities-bridge' ); ?></li>
				</ul>

				<p>
					<?php esc_html_e( 'All executions are logged with source tracking (Admin Chat vs MCP), activity history, and usage statistics.', 'abilities-bridge' ); ?>
				</p>

				<p>
					<strong><?php esc_html_e( 'Security:', 'abilities-bridge' ); ?></strong>
					<?php esc_html_e( 'Abilities registered by plugins are subject to the user-managed permission system. All actions require explicit authorization.', 'abilities-bridge' ); ?>
				</p>
			</div>
			</div>

			<!-- Pro Features Tab -->
			<div class="abilities-bridge-tab-content" id="tab-pro" style="display: <?php echo 'pro' === $active_tab ? 'block' : 'none'; ?>;"><?php // phpcs:ignore ?>
				<div class="card" style="max-width: 900px;">
					<!-- Hero Section -->
					<div style="background: linear-gradient(135deg, #4a5568 0%, #2d3748 100%); color: white; padding: 40px; border-radius: 8px; text-align: center; margin-bottom: 30px;">
						<h1 style="color: white; margin: 0 0 10px 0; font-size: 36px;">
							<?php esc_html_e( 'Extend Your AI System Admin', 'abilities-bridge' ); ?>
						</h1>
						<p style="font-size: 18px; margin: 0; opacity: 0.95;">
							<?php esc_html_e( 'Professional services and plugins to get more from your AI-powered WordPress site', 'abilities-bridge' ); ?>
						</p>
					</div>

					<!-- Feature Grid (2 Column Layout) -->
					<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-bottom: 30px; max-width: 800px; margin-left: auto; margin-right: auto;">

						<!-- Concierge Service -->
						<div style="border: 2px solid #e0e0e0; padding: 30px; border-radius: 8px; background: #f9f9f9;">
							<h3 style="margin: 0 0 15px 0; color: #333; font-size: 22px;">
								<?php esc_html_e( 'Upgrade to Concierge Service', 'abilities-bridge' ); ?>
							</h3>
							<p style="margin: 0 0 20px 0; color: #666; line-height: 1.6; font-size: 15px;">
								<?php esc_html_e( 'Skip the learning curve entirely. Get Abilities Bridge professionally installed on your test and production sites, connected to Claude and OpenAI, plus consultation and ongoing priority support.', 'abilities-bridge' ); ?>
							</p>
							<a href="https://aisystemadmin.com/concierge-service/" class="button button-primary" style="font-size: 15px; padding: 8px 24px; height: auto;">
								<?php esc_html_e( 'Learn More →', 'abilities-bridge' ); ?>
							</a>
						</div>

						<!-- Site Abilities Plugin -->
						<div style="border: 2px solid #e0e0e0; padding: 30px; border-radius: 8px; background: #f9f9f9;">
							<h3 style="margin: 0 0 15px 0; color: #333; font-size: 22px;">
								<?php esc_html_e( 'Site Abilities Plugin', 'abilities-bridge' ); ?>
							</h3>
							<p style="margin: 0 0 20px 0; color: #666; line-height: 1.6; font-size: 15px;">
								<?php esc_html_e( 'Create and register custom AI abilities for your WordPress site.', 'abilities-bridge' ); ?>
							</p>
							<a href="https://aisystemadmin.com/site-abilities/" class="button button-primary" style="font-size: 15px; padding: 8px 24px; height: auto;">
								<?php esc_html_e( 'Learn More →', 'abilities-bridge' ); ?>
							</a>
						</div>

					</div>

					<!-- Have Questions Section -->
					<div style="margin-top: 30px; padding: 20px; border-top: 1px solid #e0e0e0;">
						<h3><?php esc_html_e( 'Have Questions?', 'abilities-bridge' ); ?></h3>
						<p>
							<?php
							printf(
								/* translators: %1$s: opening link tag, %2$s: closing link tag */
								esc_html__( 'Check out our %1$sdocumentation%2$s or contact us at support@aisystemadmin.com', 'abilities-bridge' ),
								'<a href="https://aisystemadmin.com/docs" target="_blank">',
								'</a>'
							);
							?>
						</p>
					</div>

				</div>
			</div>

			<!-- Learn More Tab -->
			<div class="abilities-bridge-tab-content" id="tab-learn-more" style="display: <?php echo 'learn-more' === $active_tab ? 'block' : 'none'; ?>;">
				<div class="card" style="max-width: 900px;">
					<h2><?php esc_html_e( 'Getting Started with Abilities Bridge', 'abilities-bridge' ); ?></h2>
					<p style="font-size: 15px; line-height: 1.6; color: #555;">
						<?php esc_html_e( 'Abilities Bridge gives your WordPress site a direct line to AI. Watch the overview below to see how it all comes together, from connecting your API keys to managing abilities and permissions.', 'abilities-bridge' ); ?>
					</p>

					<div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; margin: 25px 0; border-radius: 8px; border: 1px solid #ddd;">
						<iframe
							src="https://www.youtube.com/embed/2jbozwr5quE"
							style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;"
							allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
							allowfullscreen
							title="<?php esc_attr_e( 'Abilities Bridge Overview', 'abilities-bridge' ); ?>"
						></iframe>
					</div>

					<p style="font-size: 15px; line-height: 1.6; color: #555;">
						<?php esc_html_e( 'For guides, documentation, and more resources, visit our website.', 'abilities-bridge' ); ?>
					</p>
					<p>
						<a href="https://aisystemadmin.com" target="_blank" class="button button-primary" style="font-size: 15px; padding: 8px 24px; height: auto;">
							<?php esc_html_e( 'Visit aisystemadmin.com', 'abilities-bridge' ); ?>
						</a>
					</p>
				</div>
			</div>
		</div>
		<?php
	}

	/**
	 * Check system requirements
	 *
	 * @return array
	 */
	private function check_requirements() {
		$requirements = array();

		// Check PHP version.
		$requirements[] = array(
			'name'    => 'PHP Version',
			'status'  => version_compare( PHP_VERSION, '7.4', '>=' ),
			'details' => 'Current: ' . PHP_VERSION . ' (Required: 7.4+)',
		);

		// Check JSON extension.
		$requirements[] = array(
			'name'    => 'JSON Extension',
			'status'  => function_exists( 'json_encode' ),
			'details' => function_exists( 'json_encode' ) ? 'Available' : 'Missing - required for API communication',
		);

		// Check cURL extension.
		$requirements[] = array(
			'name'    => 'cURL Extension',
			'status'  => function_exists( 'curl_init' ),
			'details' => function_exists( 'curl_init' ) ? 'Available' : 'Missing - required for API communication',
		);

		// Check file permissions for uploads directory using WP_Filesystem.
		$upload_dir  = wp_upload_dir();
		$content_dir = $upload_dir['basedir'] . '/abilities-bridge';

		global $wp_filesystem;
		if ( empty( $wp_filesystem ) ) {
			require_once ABSPATH . 'wp-admin/includes/file.php';
			WP_Filesystem();
		}

		$parent_writable = $wp_filesystem->is_writable( $upload_dir['basedir'] );
		$dir_exists      = $wp_filesystem->is_dir( $content_dir );
		$dir_writable    = $dir_exists && $wp_filesystem->is_writable( $content_dir );

		$requirements[] = array(
			'name'    => 'Uploads Directory Writable',
			'status'  => $parent_writable || $dir_writable,
			'details' => $parent_writable ? 'Uploads directory writable' : ( $dir_exists ? 'Plugin directory exists' : 'Cannot create plugin directory' ),
		);

		return $requirements;
	}
}