/**
 * Custom Error Classes for Homelab Topology API
 * 
 * Structured error hierarchy following nodejs-backend-patterns skill.
 * All operational errors extend AppError with appropriate HTTP status codes.
 */

export class AppError extends Error {
    constructor(
        public message: string,
        public statusCode: number = 500,
        public isOperational: boolean = true
    ) {
        super(message);
        Object.setPrototypeOf(this, AppError.prototype);
        Error.captureStackTrace(this, this.constructor);
    }
}

export class NotFoundError extends AppError {
    constructor(message: string = 'Resource not found') {
        super(message, 404);
    }
}

export class ValidationError extends AppError {
    constructor(message: string, public errors?: Array<{ field: string; message: string }>) {
        super(message, 400);
    }
}

export class ServiceUnavailableError extends AppError {
    constructor(message: string = 'Service temporarily unavailable') {
        super(message, 503);
    }
}