/**
 * Developer Profile Module
 * ========================
 * TypeScript adds compile-time type checking to JavaScript.
 * Errors are caught before runtime, making refactoring safer.
 */
import { skills } from './skills';
import { careerJourney } from './career';

/**
 * Type Alias: Status
 * ------------------
 * 'type' creates an alias for any type expression.
 * Union types (A | B | C) restrict values to specific options.
 * This is called a "discriminated union" or "tagged union".
 */
type Status = "open" | "freelance" | "unavailable";

/**
 * Interface: Developer
 * --------------------
 * Interfaces define the "shape" or "contract" for objects.
 * Any object typed as Developer MUST have all these properties.
 *
 * Key differences from 'type':
 * - Can be extended: interface Senior extends Developer
 * - Can be implemented: class Person implements Developer
 * - Declaration merging: same interface name = combined
 */
interface Developer {
  readonly name: string;   // readonly = cannot reassign after init
  role: string;
  location: string;
  techStack: readonly string[];  // readonly array = no push/pop/etc
  openTo: string[];
  strengths: string[];
  status: Status;  // Must be one of the Status union values
}

/**
 * Developer Instance
 * ------------------
 * The ': Developer' annotation enforces the interface.
 * TypeScript will error if any property is missing or wrong type.
 */
const developer: Developer = {
  name: "Alvin Quach",
  role: "Full Stack Developer",
  location: "San Francisco Bay Area, CA",
  techStack: Object.keys(skills),  // 68 skills total
  openTo: [
    "Full Stack Engineer",
    "Product Engineer",
    "Frontend Engineer",
    "Developer Advocate"
  ],
  strengths: ["Full-stack versatility - comfortable across frontend, backend, and data", "Strong communication skills from community management background", "User empathy - I think about how features affect real people", "Self-directed - I shipped multiple 0-to-1 products independently", "Comfortable with ambiguity and figuring things out"],
  status: "open",
};

export default developer;