<?php
/**
 * Environments — variable set management via wp_options.
 *
 * @package Advanced_REST_API_DevTools
 */

defined( 'ABSPATH' ) || exit;

class Aradt_Environments {

	/**
	 * Register AJAX handlers.
	 */
	public static function register_ajax() {
		add_action( 'wp_ajax_aradt_envs_list', array( __CLASS__, 'ajax_list' ) );
		add_action( 'wp_ajax_aradt_envs_save', array( __CLASS__, 'ajax_save' ) );
		add_action( 'wp_ajax_aradt_envs_delete', array( __CLASS__, 'ajax_delete' ) );
		add_action( 'wp_ajax_aradt_envs_set_active', array( __CLASS__, 'ajax_set_active' ) );
		add_action( 'wp_ajax_aradt_envs_globals', array( __CLASS__, 'ajax_save_globals' ) );
		add_action( 'wp_ajax_aradt_envs_get_globals', array( __CLASS__, 'ajax_get_globals' ) );
	}

	/**
	 * AJAX: List all environments.
	 */
	public static function ajax_list() {
		check_ajax_referer( 'aradt_nonce', 'nonce' );
		Aradt_Utils::verify_ajax_request();

		$envs   = get_option( 'aradt_environments', array() );
		$active = get_option( 'aradt_active_environment', '' );

		if ( ! is_array( $envs ) ) {
			$envs = array();
		}

		wp_send_json_success( array(
			'environments' => $envs,
			'active'       => $active,
		) );
	}

	/**
	 * AJAX: Save (create/update) an environment.
	 */
	public static function ajax_save() {
		check_ajax_referer( 'aradt_nonce', 'nonce' );
		Aradt_Utils::verify_ajax_request();

		$env_id    = isset( $_POST['env_id'] ) ? sanitize_key( wp_unslash( (string) $_POST['env_id'] ) ) : '';
		$name      = isset( $_POST['name'] ) ? sanitize_text_field( wp_unslash( (string) $_POST['name'] ) ) : '';
		$variables = isset( $_POST['variables'] ) ? Aradt_Utils::sanitize_recursive( Aradt_Utils::safe_json_decode( sanitize_textarea_field( wp_unslash( (string) $_POST['variables'] ) ) ) ) : array();

		if ( empty( $name ) ) {
			wp_send_json_error( array( 'message' => esc_html__( 'Environment name is required.', 'advanced-rest-api-devtools' ) ) );
		}

		if ( ! is_array( $variables ) ) {
			$variables = array();
		}

		$envs = get_option( 'aradt_environments', array() );
		if ( ! is_array( $envs ) ) {
			$envs = array();
		}

		$is_new = true;
		if ( ! empty( $env_id ) ) {
			// Update existing.
			foreach ( $envs as &$env ) {
				if ( isset( $env['id'] ) && $env['id'] === $env_id ) {
					$env['name']      = $name;
					$env['variables'] = $variables;
					$env['modified']  = current_time( 'mysql' );
					$is_new = false;
					break;
				}
			}
			unset( $env );
		}

		if ( $is_new ) {
			$env_id = wp_generate_uuid4();
			$envs[] = array(
				'id'        => $env_id,
				'name'      => $name,
				'variables' => $variables,
				'created'   => current_time( 'mysql' ),
				'modified'  => current_time( 'mysql' ),
			);
		}

		update_option( 'aradt_environments', $envs );

		wp_send_json_success( array(
			'id'      => $env_id,
			'message' => esc_html__( 'Environment saved.', 'advanced-rest-api-devtools' ),
		) );
	}

	/**
	 * AJAX: Delete an environment.
	 */
	public static function ajax_delete() {
		check_ajax_referer( 'aradt_nonce', 'nonce' );
		Aradt_Utils::verify_ajax_request();

		$env_id = sanitize_key( wp_unslash( $_POST['env_id'] ?? '' ) );
		if ( empty( $env_id ) ) {
			wp_send_json_error( array( 'message' => esc_html__( 'Invalid environment ID.', 'advanced-rest-api-devtools' ) ) );
		}

		$envs = get_option( 'aradt_environments', array() );
		if ( ! is_array( $envs ) ) {
			$envs = array();
		}

		$envs = array_values( array_filter( $envs, function ( $env ) use ( $env_id ) {
			return ! isset( $env['id'] ) || $env['id'] !== $env_id;
		} ) );

		update_option( 'aradt_environments', $envs );

		// If deleted the active one, clear active.
		$active = get_option( 'aradt_active_environment', '' );
		if ( $active === $env_id ) {
			delete_option( 'aradt_active_environment' );
		}

		wp_send_json_success( array( 'message' => esc_html__( 'Environment deleted.', 'advanced-rest-api-devtools' ) ) );
	}

	/**
	 * AJAX: Set the active environment.
	 */
	public static function ajax_set_active() {
		check_ajax_referer( 'aradt_nonce', 'nonce' );
		Aradt_Utils::verify_ajax_request();

		$env_id = sanitize_key( wp_unslash( $_POST['env_id'] ?? '' ) );

		if ( empty( $env_id ) ) {
			delete_option( 'aradt_active_environment' );
		} else {
			update_option( 'aradt_active_environment', $env_id );
		}

		wp_send_json_success( array(
			'active'  => $env_id,
			'message' => esc_html__( 'Active environment updated.', 'advanced-rest-api-devtools' ),
		) );
	}

	/**
	 * AJAX: Save global variables.
	 */
	public static function ajax_save_globals() {
		check_ajax_referer( 'aradt_nonce', 'nonce' );
		Aradt_Utils::verify_ajax_request();

		$variables = isset( $_POST['variables'] ) ? Aradt_Utils::sanitize_recursive( Aradt_Utils::safe_json_decode( sanitize_textarea_field( wp_unslash( (string) $_POST['variables'] ) ) ) ) : array();
		if ( ! is_array( $variables ) ) {
			$variables = array();
		}

		update_option( 'aradt_global_variables', $variables );

		wp_send_json_success( array( 'message' => esc_html__( 'Global variables saved.', 'advanced-rest-api-devtools' ) ) );
	}

	/**
	 * AJAX: Get global variables.
	 */
	public static function ajax_get_globals() {
		check_ajax_referer( 'aradt_nonce', 'nonce' );
		Aradt_Utils::verify_ajax_request();

		$variables = get_option( 'aradt_global_variables', array() );

		wp_send_json_success( array( 'variables' => is_array( $variables ) ? $variables : array() ) );
	}
}