<?php

/**
 * Admin Settings Class
 * Handles plugin settings page and options
 *
 * @package AI_Commerce_Assistant
 */

if ( !defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Admin Settings Class
 */
class AICA_Admin_Settings {


	/**
	 * Single instance
	 *
	 * @var AICA_Admin_Settings
	 */
	private static $instance = null;

	/**
	 * Settings page slug
	 *
	 * @var string
	 */
	private $page_slug = 'aica-smart-ai-commerce-assistant-settings';

	/**
	 * Get instance
	 *
	 * @return AICA_Admin_Settings
	 */
	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor
	 */
	private function __construct() {
		add_action( 'admin_init', array( $this, 'register_settings' ) );
		add_action( 'admin_notices', array( $this, 'admin_notices' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
	}

	public function enqueue_scripts( $hook ) {
		// Looser check to ensure it loads on the settings page regardless of parent slug nuances
		if ( strpos( $hook, 'aica-smart-ai-commerce-assistant-settings' ) === false ) {
			return;
		}

		wp_enqueue_script(
			'aica-admin-settings',
			AICA_PLUGIN_URL . 'assets/js/admin-settings.js',
			array( 'jquery' ),
			AICA_VERSION,
			true
		);
	}

	/**
	 * Register settings
	 *
	 * @return void
	 */
	public function register_settings() {
		// Register main settings option
		register_setting(
			'aica_settings_group',
			'aica_settings',
			array( $this, 'sanitize_settings' )
		);

		// General Settings Section
		add_settings_section(
			'aica_general_section',
			__( 'General Settings', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'general_section_callback' ),
			$this->page_slug
		);

		add_settings_field(
			'enable_widget',
			__( 'Enable Widget', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'checkbox_field_callback' ),
			$this->page_slug,
			'aica_general_section',
			array(
				'label_for'   => 'enable_widget',
				'description' => __( 'Enable the AI assistant widget on frontend', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'widget_position',
			__( 'Widget Position', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),
			$this->page_slug,
			'aica_general_section',
			array(
				'label_for' => 'widget_position',
				'options'   => array(
					'bottom-right' => __( 'Bottom Right', 'aica-smart-ai-commerce-assistant' ),
					'bottom-left'  => __( 'Bottom Left', 'aica-smart-ai-commerce-assistant' ),
					'top-right'    => __( 'Top Right', 'aica-smart-ai-commerce-assistant' ),
					'top-left'     => __( 'Top Left', 'aica-smart-ai-commerce-assistant' ),
				),
			)
		);

		// Default Theme
		add_settings_field(
			'default_theme',
			__( 'Default Theme', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),  // ← CORRETTO
			$this->page_slug,                        // ← CORRETTO
			'aica_general_section',                  // ← CORRETTO
			array(
				'label_for'   => 'default_theme',
				'options'     => array(
					'auto'  => __( 'Auto (System preference)', 'aica-smart-ai-commerce-assistant' ),
					'light' => __( 'Light', 'aica-smart-ai-commerce-assistant' ),
					'dark'  => __( 'Dark', 'aica-smart-ai-commerce-assistant' ),
				),
				'description' => __( 'Choose the default theme for the widget. Users can still toggle between themes using the button in the widget header.', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		// AI Provider Settings Section
		add_settings_section(
			'aica_ai_section',
			__( 'AI Provider Settings', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'ai_section_callback' ),
			$this->page_slug
		);

		add_settings_field(
			'ai_provider',
			__( 'AI Provider', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'   => 'ai_provider',
				'options'     => array(
					'openai'     => __( 'OpenAI (ChatGPT)', 'aica-smart-ai-commerce-assistant' ),
					'anthropic'  => __( 'Anthropic (Claude)', 'aica-smart-ai-commerce-assistant' ),
					'google'     => __( 'Google (Gemini)', 'aica-smart-ai-commerce-assistant' ),
					'openrouter' => __( 'OpenRouter (Multiple Models)', 'aica-smart-ai-commerce-assistant' ),
				),
				'description' => __( 'Choose your preferred AI provider', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'openai_api_key',
			__( 'OpenAI API Key', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'password_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'openai_api_key',
				'placeholder'   => 'sk-...',
				'description'   => sprintf(
					/* translators: %s: OpenAI link */
					__( 'Need an API Key? Get one here: %s', 'aica-smart-ai-commerce-assistant' ),
					'<a href="https://platform.openai.com/api-keys" target="_blank" rel="noopener noreferrer">OpenAI Platform</a>'
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'openai',
			)
		);

		add_settings_field(
			'openai_model',
			__( 'OpenAI Model', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'openai_model',
				'options'       => array(
					'gpt-4o'        => 'GPT-4o (Best quality)',
					'gpt-4o-mini'   => 'GPT-4o Mini (Balanced)',
					'gpt-3.5-turbo' => 'GPT-3.5 Turbo (Fast & cheap)',
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'openai',
			)
		);

		add_settings_field(
			'anthropic_api_key',
			__( 'Anthropic API Key', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'password_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'anthropic_api_key',
				'placeholder'   => 'sk-ant-...',
				'description'   => sprintf(
					/* translators: %s: Anthropic link */
					__( 'Need an API Key? Get one here: %s', 'aica-smart-ai-commerce-assistant' ),
					'<a href="https://console.anthropic.com/" target="_blank" rel="noopener noreferrer">Anthropic Console</a>'
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'anthropic',
			)
		);

		add_settings_field(
			'anthropic_model',
			__( 'Claude Model', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'anthropic_model',
				'options'       => array(
					'claude-3-5-sonnet-20241022' => 'Claude 3.5 Sonnet (Best)',
					'claude-3-5-haiku-20241022'  => 'Claude 3.5 Haiku (Fast)',
					'claude-3-opus-20240229'     => 'Claude 3 Opus (Legacy)',
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'anthropic',
			)
		);

		add_settings_field(
			'google_api_key',
			__( 'Google API Key', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'password_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'google_api_key',
				'description'   => sprintf(
					/* translators: %s: Google link */
					__( 'Need an API Key? Get one here: %s', 'aica-smart-ai-commerce-assistant' ),
					'<a href="https://makersuite.google.com/app/apikey" target="_blank" rel="noopener noreferrer">Google AI Studio</a>'
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'google',
			)
		);

		add_settings_field(
			'google_model',
			__( 'Gemini Model', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'google_model',
				'options'       => array(
					'gemini-2.5-flash'      => 'Gemini 2.5 Flash (Recommended)',
					'gemini-2.0-flash'      => 'Gemini 2.0 Flash',
					'gemini-flash-latest'   => 'Gemini Flash Latest',
					'gemini-2.5-pro'        => 'Gemini 2.5 Pro (Best Quality)',
					'gemini-pro-latest'     => 'Gemini Pro Latest',
					'gemini-2.0-flash-lite' => 'Gemini 2.0 Flash Lite (Fastest)',
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'google',
			)
		);

		add_settings_field(
			'openrouter_api_key',
			__( 'OpenRouter API Key', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'password_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'openrouter_api_key',
				'description'   => sprintf(
					/* translators: %s: OpenRouter link */
					__( 'Need an API Key? Get one here: %s', 'aica-smart-ai-commerce-assistant' ),
					'<a href="https://openrouter.ai/keys" target="_blank" rel="noopener noreferrer">OpenRouter</a>'
				),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'openrouter',
			)
		);

		add_settings_field(
			'openrouter_model',
			__( 'Model', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'text_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'     => 'openrouter_model',
				'placeholder'   => 'anthropic/claude-3.5-sonnet',
				'description'   => __( 'Enter model ID from OpenRouter', 'aica-smart-ai-commerce-assistant' ),
				'show_if'       => 'ai_provider',
				'show_if_value' => 'openrouter',
			)
		);

		add_settings_field(
			'temperature',
			__( 'Temperature', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'number_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'   => 'temperature',
				'min'         => 0,
				'max'         => 2,
				'step'        => 0.1,
				'description' => __( 'Controls randomness (0 = focused, 2 = creative)', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'max_tokens',
			__( 'Max Tokens', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'number_field_callback' ),
			$this->page_slug,
			'aica_ai_section',
			array(
				'label_for'   => 'max_tokens',
				'min'         => 100,
				'max'         => 4000,
				'step'        => 100,
				'description' => __( 'Maximum response length', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		// RAG Settings Section
		add_settings_section(
			'aica_rag_section',
			__( 'RAG & Product Search Settings', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'rag_section_callback' ),
			$this->page_slug
		);

		add_settings_field(
			'enable_embeddings',
			__( 'Enable Embeddings', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'checkbox_field_callback' ),
			$this->page_slug,
			'aica_rag_section',
			array(
				'label_for'   => 'enable_embeddings',
				'description' => __( 'Use AI embeddings for better product search (requires API credits)', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'embedding_model',
			__( 'Embedding Model', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'select_field_callback' ),
			$this->page_slug,
			'aica_rag_section',
			array(
				'label_for' => 'embedding_model',
				'options'   => array(
					'text-embedding-3-small' => 'OpenAI text-embedding-3-small (Cheap)',
					'text-embedding-3-large' => 'OpenAI text-embedding-3-large (Best)',
					'text-embedding-ada-002' => 'OpenAI ada-002 (Legacy)',
				),
			)
		);

		add_settings_field(
			'max_products_per_response',
			__( 'Max Products per Response', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'number_field_callback' ),
			$this->page_slug,
			'aica_rag_section',
			array(
				'label_for'   => 'max_products_per_response',
				'min'         => 1,
				'max'         => 20,
				'step'        => 1,
				'description' => __( 'Maximum number of products to show in chat', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		// Appearance Settings Section
		add_settings_section(
			'aica_appearance_section',
			__( 'Appearance Settings', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'appearance_section_callback' ),
			$this->page_slug
		);

		add_settings_field(
			'primary_color',
			__( 'Primary Color', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'color_field_callback' ),
			$this->page_slug,
			'aica_appearance_section',
			array(
				'label_for' => 'primary_color',
			)
		);

		add_settings_field(
			'widget_title',
			__( 'Widget Title', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'text_field_callback' ),
			$this->page_slug,
			'aica_appearance_section',
			array(
				'label_for'   => 'widget_title',
				'placeholder' => __( 'AI Assistant', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'greeting_message',
			__( 'Greeting Message', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'textarea_field_callback' ),
			$this->page_slug,
			'aica_appearance_section',
			array(
				'label_for'   => 'greeting_message',
				'placeholder' => __( 'Hi! How can I help you today?', 'aica-smart-ai-commerce-assistant' ),
				'rows'        => 3,
			)
		);

		// Features Section
		add_settings_section(
			'aica_features_section',
			__( 'Features', 'aica-smart-ai-commerce-assistant' ),
			null,
			$this->page_slug
		);

		add_settings_field(
			'enable_product_recommendations',
			__( 'Product Recommendations', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'checkbox_field_callback' ),
			$this->page_slug,
			'aica_features_section',
			array(
				'label_for'   => 'enable_product_recommendations',
				'description' => __( 'Allow AI to recommend products', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'enable_cart_actions',
			__( 'Cart Actions', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'checkbox_field_callback' ),
			$this->page_slug,
			'aica_features_section',
			array(
				'label_for'   => 'enable_cart_actions',
				'description' => __( 'Allow adding/removing products via chat', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		// Rate Limiting Section
		add_settings_section(
			'aica_rate_limit_section',
			__( 'Rate Limiting', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'rate_limit_section_callback' ),
			$this->page_slug
		);

		add_settings_field(
			'rate_limit_enabled',
			__( 'Enable Rate Limiting', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'checkbox_field_callback' ),
			$this->page_slug,
			'aica_rate_limit_section',
			array(
				'label_for'   => 'rate_limit_enabled',
				'description' => __( 'Prevent spam and control API costs', 'aica-smart-ai-commerce-assistant' ),
			)
		);

		add_settings_field(
			'rate_limit_messages',
			__( 'Max Messages per Hour', 'aica-smart-ai-commerce-assistant' ),
			array( $this, 'number_field_callback' ),
			$this->page_slug,
			'aica_rate_limit_section',
			array(
				'label_for' => 'rate_limit_messages',
				'min'       => 10,
				'max'       => 1000,
				'step'      => 10,
			)
		);
	}

	/**
	 * Section callbacks
	 */
	public function general_section_callback() {
		echo '<p>' . esc_html__( 'Configure general plugin settings', 'aica-smart-ai-commerce-assistant' ) . '</p>';
	}

	public function ai_section_callback() {
		echo '<p>' . esc_html__( 'Choose and configure your AI provider', 'aica-smart-ai-commerce-assistant' ) . '</p>';
	}

	public function rag_section_callback() {
		echo '<p>' . esc_html__( 'Configure RAG (Retrieval-Augmented Generation) for better product search', 'aica-smart-ai-commerce-assistant' ) . '</p>';
	}

	public function appearance_section_callback() {
		echo '<p>' . esc_html__( 'Customize the widget appearance', 'aica-smart-ai-commerce-assistant' ) . '</p>';
	}

	public function rate_limit_section_callback() {
		echo '<p>' . esc_html__( 'Protect against spam and control API usage', 'aica-smart-ai-commerce-assistant' ) . '</p>';
	}

	/**
	 * Field callbacks
	 */
	public function text_field_callback( $args ) {
		$settings    = get_option( 'aica_settings', array() );
		$value       = isset( $settings[ $args['label_for'] ] ) ? $settings[ $args['label_for'] ] : '';
		$placeholder = isset( $args['placeholder'] ) ? $args['placeholder'] : '';

		printf(
			'<input type="text" id="%s" name="aica_settings[%s]" value="%s" placeholder="%s" class="regular-text" />',
			esc_attr( $args['label_for'] ),
			esc_attr( $args['label_for'] ),
			esc_attr( $value ),
			esc_attr( $placeholder )
		);

		if ( isset( $args['description'] ) ) {
			printf( '<p class="description">%s</p>', wp_kses_post( $args['description'] ) );
		}
	}

	public function password_field_callback( $args ) {
		$settings    = get_option( 'aica_settings', array() );
		$value       = isset( $settings[ $args['label_for'] ] ) ? $settings[ $args['label_for'] ] : '';
		$placeholder = isset( $args['placeholder'] ) ? $args['placeholder'] : '';

		printf(
			'<input type="password" id="%s" name="aica_settings[%s]" value="%s" placeholder="%s" class="regular-text" />',
			esc_attr( $args['label_for'] ),
			esc_attr( $args['label_for'] ),
			esc_attr( $value ),
			esc_attr( $placeholder )
		);

		if ( isset( $args['description'] ) ) {
			printf( '<p class="description">%s</p>', wp_kses_post( $args['description'] ) );
		}
	}

	public function textarea_field_callback( $args ) {
		$settings    = get_option( 'aica_settings', array() );
		$value       = isset( $settings[ $args['label_for'] ] ) ? $settings[ $args['label_for'] ] : '';
		$rows        = isset( $args['rows'] ) ? $args['rows'] : 5;
		$placeholder = isset( $args['placeholder'] ) ? $args['placeholder'] : '';

		printf(
			'<textarea id="%s" name="aica_settings[%s]" rows="%d" class="large-text" placeholder="%s">%s</textarea>',
			esc_attr( $args['label_for'] ),
			esc_attr( $args['label_for'] ),
			esc_attr( $rows ),
			esc_attr( $placeholder ),
			esc_textarea( $value )
		);
	}

	public function checkbox_field_callback( $args ) {
		$settings = get_option( 'aica_settings', array() );
		$checked  = isset( $settings[ $args['label_for'] ] ) && $settings[ $args['label_for'] ] === 'yes';

		printf(
			'<input type="checkbox" id="%s" name="aica_settings[%s]" value="yes" %s />',
			esc_attr( $args['label_for'] ),
			esc_attr( $args['label_for'] ),
			checked( $checked, true, false )
		);

		if ( isset( $args['description'] ) ) {
			printf( '<p class="description">%s</p>', esc_html( $args['description'] ) );
		}
	}

	public function select_field_callback( $args ) {
		$settings = get_option( 'aica_settings', array() );
		$value    = isset( $settings[ $args['label_for'] ] ) ? $settings[ $args['label_for'] ] : '';

		printf( '<select id="%s" name="aica_settings[%s]">', esc_attr( $args['label_for'] ), esc_attr( $args['label_for'] ) );

		foreach ( $args['options'] as $option_value => $option_label ) {
			printf(
				'<option value="%s" %s>%s</option>',
				esc_attr( $option_value ),
				selected( $value, $option_value, false ),
				esc_html( $option_label )
			);
		}

		echo '</select>';

		if ( isset( $args['description'] ) ) {
			printf( '<p class="description">%s</p>', wp_kses_post( $args['description'] ) );
		}
	}

	public function number_field_callback( $args ) {
		$settings = get_option( 'aica_settings', array() );
		$value    = isset( $settings[ $args['label_for'] ] ) ? $settings[ $args['label_for'] ] : '';

		printf(
			'<input type="number" id="%s" name="aica_settings[%s]" value="%s" min="%s" max="%s" step="%s" />',
			esc_attr( $args['label_for'] ),
			esc_attr( $args['label_for'] ),
			esc_attr( $value ),
			esc_attr( $args['min'] ),
			esc_attr( $args['max'] ),
			esc_attr( $args['step'] )
		);

		if ( isset( $args['description'] ) ) {
			printf( '<p class="description">%s</p>', esc_html( $args['description'] ) );
		}
	}

	public function color_field_callback( $args ) {
		$settings = get_option( 'aica_settings', array() );
		$value    = isset( $settings[ $args['label_for'] ] ) ? $settings[ $args['label_for'] ] : '#0066FF';

		printf(
			'<input type="color" id="%s" name="aica_settings[%s]" value="%s" />',
			esc_attr( $args['label_for'] ),
			esc_attr( $args['label_for'] ),
			esc_attr( $value )
		);
	}

	/**
	 * Sanitize settings
	 *
	 * @param array $input Settings input
	 * @return array
	 */
	public function sanitize_settings( $input ) {
		$sanitized = array();

		// Text fields
		$text_fields = array( 'widget_title', 'openai_model', 'anthropic_model', 'google_model', 'openrouter_model', 'embedding_model' );
		foreach ( $text_fields as $field ) {
			if ( isset( $input[ $field ] ) ) {
				$sanitized[ $field ] = sanitize_text_field( $input[ $field ] );
			}
		}

		// Password fields (API keys)
		$password_fields = array( 'openai_api_key', 'anthropic_api_key', 'google_api_key', 'openrouter_api_key' );
		foreach ( $password_fields as $field ) {
			if ( isset( $input[ $field ] ) ) {
				$sanitized[ $field ] = sanitize_text_field( $input[ $field ] );
			}
		}

		// Textarea
		if ( isset( $input['greeting_message'] ) ) {
			$sanitized['greeting_message'] = sanitize_textarea_field( $input['greeting_message'] );
		}

		// Checkboxes
		$checkbox_fields = array( 'enable_widget', 'enable_embeddings', 'enable_product_recommendations', 'enable_cart_actions', 'rate_limit_enabled' );
		foreach ( $checkbox_fields as $field ) {
			$sanitized[ $field ] = isset( $input[ $field ] ) && $input[ $field ] === 'yes' ? 'yes' : 'no';
		}

		// Select fields
		$select_fields = array( 'ai_provider', 'widget_position', 'default_theme' );
		foreach ( $select_fields as $field ) {
			if ( isset( $input[ $field ] ) ) {
				$sanitized[ $field ] = sanitize_text_field( $input[ $field ] );
			}
		}

		// Number fields
		if ( isset( $input['temperature'] ) ) {
			$sanitized['temperature'] = floatval( $input['temperature'] );
		}
		if ( isset( $input['max_tokens'] ) ) {
			$sanitized['max_tokens'] = intval( $input['max_tokens'] );
		}
		if ( isset( $input['max_products_per_response'] ) ) {
			$sanitized['max_products_per_response'] = intval( $input['max_products_per_response'] );
		}
		if ( isset( $input['rate_limit_messages'] ) ) {
			$sanitized['rate_limit_messages'] = intval( $input['rate_limit_messages'] );
		}

		// Color
		if ( isset( $input['primary_color'] ) ) {
			$sanitized['primary_color'] = sanitize_hex_color( $input['primary_color'] );
		}

		return $sanitized;
	}

	/**
	 * Display admin notices
	 *
	 * @return void
	 */
	public function admin_notices() {
		$settings = get_option( 'aica_settings', array() );
		$provider = $settings['ai_provider'] ?? '';

		// Check if API key is set
		$api_key_field = '';
		switch ( $provider ) {
			case 'openai':
				$api_key_field = 'openai_api_key';
				break;
			case 'anthropic':
				$api_key_field = 'anthropic_api_key';
				break;
			case 'google':
				$api_key_field = 'google_api_key';
				break;
			case 'openrouter':
				$api_key_field = 'openrouter_api_key';
				break;
		}

		if ( $api_key_field && empty( $settings[ $api_key_field ] ) ) {
			$screen = get_current_screen();
			if ( $screen && strpos( $screen->id, 'aica-smart-ai-commerce-assistant' ) !== false ) {
				?>
				<div class="notice notice-warning">
					<p>
						<?php esc_html_e( 'Please configure your AI provider API key to enable the assistant.', 'aica-smart-ai-commerce-assistant' ); ?>
					</p>
				</div>
				<?php
			}
		}
	}

	/**
	 * Render settings page
	 *
	 * @return void
	 */
	public function render_settings_page() {
		// Check user capabilities
		if ( !current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'aica-smart-ai-commerce-assistant' ) );
		}

		?>
		<div class="wrap">
			<h1><?php echo esc_html( get_admin_page_title() ); ?></h1>

			<div style="max-width: 1200px;">
				<!-- Header Banner -->
				<div style="background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding: 40px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.2); margin: 30px 0; color: white;">
					<h2 style="margin: 0 0 10px 0; color: white; font-size: 28px;">
						⚙️ <?php esc_html_e( 'Plugin Settings', 'aica-smart-ai-commerce-assistant' ); ?>
					</h2>
					<p style="font-size: 16px; margin: 0; opacity: 0.95;">
						<?php esc_html_e( 'Configure your AI provider, customize the widget appearance, and manage all plugin features from here.', 'aica-smart-ai-commerce-assistant' ); ?>
					</p>
				</div>

				<form action="options.php" method="post">
					<?php
					// Nonce field automatically added by settings_fields()
					settings_fields( 'aica_settings_group' );
					?>
					

					
					<?php
					// Get all sections
					global $wp_settings_sections, $wp_settings_fields;
					
					if ( isset( $wp_settings_sections[ $this->page_slug ] ) ) {
						foreach ( (array) $wp_settings_sections[ $this->page_slug ] as $section ) {
							?>
							<div class="aica-settings-section">
								<?php
								if ( $section['title'] ) {
									echo "<h2>" . esc_html( $section['title'] ) . "</h2>";
								}

								if ( $section['callback'] ) {
									call_user_func( $section['callback'], $section );
								}

								if ( ! isset( $wp_settings_fields ) || ! isset( $wp_settings_fields[ $this->page_slug ] ) || ! isset( $wp_settings_fields[ $this->page_slug ][ $section['id'] ] ) ) {
									continue;
								}
								?>
								<table class="form-table" role="presentation">
									<?php do_settings_fields( $this->page_slug, $section['id'] ); ?>
								</table>
							</div>
							<?php
						}
					}
					?>
					
					<div class="aica-save-section">
						<?php submit_button( __( 'Save Settings', 'aica-smart-ai-commerce-assistant' ), 'primary', 'submit', false ); ?>
					</div>
				</form>
			</div>
		</div>


		<?php
	}
}