<?php
/**
 * Admin functionality.
 *
 * @package Aivexa
 */

declare(strict_types=1);

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

/**
 * Admin area handler.
 */
class Aivexa_Admin {

	/**
	 * Register admin menus.
	 */
	public function register_menus(): void {
		add_menu_page(
			__( 'Aivexa', 'aivexa' ),
			__( 'Aivexa', 'aivexa' ),
			'manage_options',
			'aivexa',
			array( $this, 'render_dashboard_page' ),
			'dashicons-format-chat',
			58
		);

		add_submenu_page(
			'aivexa',
			__( 'Dashboard', 'aivexa' ),
			__( 'Dashboard', 'aivexa' ),
			'manage_options',
			'aivexa',
			array( $this, 'render_dashboard_page' )
		);

		add_submenu_page(
			'aivexa',
			__( 'Settings', 'aivexa' ),
			__( 'Settings', 'aivexa' ),
			'manage_options',
			'aivexa-settings',
			array( $this, 'render_settings_page' )
		);

		add_options_page(
			__( 'Aivexa', 'aivexa' ),
			__( 'Aivexa', 'aivexa' ),
			'manage_options',
			'aivexa-settings',
			array( $this, 'render_settings_page' )
		);

		add_submenu_page(
			'aivexa',
			__( 'Test Agent', 'aivexa' ),
			__( 'Test Agent', 'aivexa' ),
			'manage_options',
			'aivexa-test',
			array( $this, 'render_test_page' )
		);

		add_submenu_page(
			'aivexa',
			__( 'Tools', 'aivexa' ),
			__( 'Tools', 'aivexa' ),
			'manage_options',
			'aivexa-tools',
			array( $this, 'render_tools_page' )
		);

		add_submenu_page(
			'aivexa',
			__( 'Usage', 'aivexa' ),
			__( 'Usage', 'aivexa' ),
			'manage_options',
			'aivexa-usage',
			array( $this, 'render_usage_page' )
		);
	}

	/**
	 * Register settings.
	 */
	public function register_settings(): void {
		register_setting(
			'aivexa_settings_group',
			Aivexa_Settings::OPTION_KEY,
			array(
				'type'              => 'array',
				'sanitize_callback' => array( 'Aivexa_Settings', 'sanitize' ),
				'default'           => Aivexa_Settings::get_defaults(),
			)
		);
	}

	/**
	 * Enqueue admin assets.
	 *
	 * @param string $hook_suffix Hook suffix.
	 */
	public function enqueue_assets( string $hook_suffix ): void {
		if ( false === strpos( $hook_suffix, 'aivexa' ) ) {
			return;
		}

		wp_enqueue_style(
			'aivexa-admin',
			AIVEXA_PLUGIN_URL . 'admin/css/admin.css',
			array(),
			AIVEXA_VERSION
		);

		wp_enqueue_script(
			'aivexa-admin',
			AIVEXA_PLUGIN_URL . 'admin/js/admin.js',
			array(),
			AIVEXA_VERSION,
			true
		);

		wp_localize_script(
			'aivexa-admin',
			'aivexaAdmin',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( 'aivexa_admin_nonce' ),
				'i18n'    => array(
					'testing'  => __( 'Testing…', 'aivexa' ),
					'success'  => __( 'Connection successful.', 'aivexa' ),
					'failed'   => __( 'Connection failed.', 'aivexa' ),
					'sending'  => __( 'Sending…', 'aivexa' ),
				),
			)
		);
	}

	/**
	 * AJAX: test WordPress AI Client / Connectors.
	 */
	public function ajax_test_connection(): void {
		check_ajax_referer( 'aivexa_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aivexa' ) ), 403 );
		}

		$result = Aivexa_Client::test_connection();

		if ( is_wp_error( $result ) ) {
			wp_send_json_error( array( 'message' => $result->get_error_message() ) );
		}

		wp_send_json_success( array( 'message' => __( 'AI connection successful via the WordPress AI Client.', 'aivexa' ) ) );
	}

	/**
	 * AJAX: test agent with trace.
	 */
	public function ajax_test_agent(): void {
		check_ajax_referer( 'aivexa_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aivexa' ) ), 403 );
		}

		$message = isset( $_POST['message'] ) ? sanitize_text_field( wp_unslash( (string) $_POST['message'] ) ) : '';
		$message = Aivexa_Security::validate_message( $message );

		if ( is_wp_error( $message ) ) {
			wp_send_json_error( array( 'message' => $message->get_error_message() ) );
		}

		$agent  = new Aivexa_Agent();
		$result = $agent->chat( $message, '', true );

		if ( is_wp_error( $result ) ) {
			wp_send_json_error( array( 'message' => $result->get_error_message() ) );
		}

		wp_send_json_success( $result );
	}

	/**
	 * Render dashboard.
	 */
	public function render_dashboard_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$settings = Aivexa_Settings::get_all();
		$stats    = get_option( 'aivexa_stats', array() );
		$agent    = new Aivexa_Agent();
		$tools    = $agent->get_tools();

		include AIVEXA_PLUGIN_DIR . 'admin/views/dashboard-page.php';
	}

	/**
	 * Render settings page.
	 */
	public function render_settings_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$settings = Aivexa_Settings::get_all();
		include AIVEXA_PLUGIN_DIR . 'admin/views/settings-page.php';
	}

	/**
	 * Render test page.
	 */
	public function render_test_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		include AIVEXA_PLUGIN_DIR . 'admin/views/test-agent-page.php';
	}

	/**
	 * Render tools page.
	 */
	public function render_tools_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$agent = new Aivexa_Agent();
		$tools = $agent->get_tools();
		include AIVEXA_PLUGIN_DIR . 'admin/views/tools-page.php';
	}

	/**
	 * Render usage page.
	 */
	public function render_usage_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$stats = get_option( 'aivexa_stats', array() );
		$logs  = Aivexa_Logger::get_logs();
		include AIVEXA_PLUGIN_DIR . 'admin/views/usage-page.php';
	}
}