How to Add TSDoc Comments to TypeScript Code with AI

/**
 * Calculates the total price including tax
 * @param price - The base price in cents
 * @param taxRate - The tax rate as a decimal (e.g., 0.08 for 8%)
 * @returns The total price including tax, in cents
 */
function calculateTotal(price: number, taxRate: number): number {
  return Math.round(price * (1 + taxRate));
}

You are an AI assistant tasked with adding TSdocs (@tsDocs ) comments to a piece of code to make it more understandable for AI systems or human developers. Your goal is to analyze the code and add appropriate comments that explain its functionality, structure, and important considerations.  
  
Here is the code you need to comment:  
  
<code>  
@hooks  
</code>  
  
To complete this task, follow these steps:  
  
1. Carefully analyze the code to understand its structure and functionality.  
2. Identify key components such as functions, classes, loops, conditionals, and any complex logic.  
3. Add comments that explain:  
- The purpose of functions, classes, or code blocks  
- How complex algorithms or logic work  
- Any assumptions or limitations in the code  
- The meaning of important variables or data structures  
- Any potential edge cases or error handling  
  
When adding comments, adhere to these guidelines:  
  
- Use clear and concise language  
- Avoid stating the obvious (e.g., don't just restate what the code does)  
- Focus on the "why" and "how" rather than just the "what"  
- Use TSDoc style comments for functions, classes, and modules  
- Use single-line comments (//) for brief in-line explanations  
- Use multi-line comments (/* */) for longer explanations that don't fit TSDoc style  
  
Your output should be the original code with your added comments. Make sure to preserve the original code's formatting and structure. Present your commented code inside <commented_code> tags.  
  
Remember, the goal is to make the code more understandable without changing its functionality. Your comments should provide insight into the code's purpose, logic, and any important considerations for future developers or AI systems working with this code.

function processUserData(users: User[], threshold: number) {
  return users
    .filter(u => u.score > threshold && u.active)
    .map(u => ({
      ...u,
      rank: calculateRank(u.score),
      tier: u.score > 90 ? 'gold' : u.score > 70 ? 'silver' : 'bronze'
    }))
    .sort((a, b) => b.score - a.score);
}

/**
 * Processes and ranks active users based on their scores
 * @param users - Array of user objects to process
 * @param threshold - Minimum score required for inclusion
 * @returns Sorted array of active users above threshold with rank and tier
 * @example
 * const topUsers = processUserData(allUsers, 50);
 * // Returns users with score > 50, ranked and tiered
 */
function processUserData(users: User[], threshold: number) {
  return users
    .filter(u => u.score > threshold && u.active)
    .map(u => ({
      ...u,
      rank: calculateRank(u.score), // Custom ranking algorithm based on percentiles
      tier: u.score > 90 ? 'gold' : u.score > 70 ? 'silver' : 'bronze'
    }))
    .sort((a, b) => b.score - a.score); // Descending order by score
}