/**
 * Test file for JavaScript/TypeScript LSP diagnostics
 * Tests error, warning, info, and hint virtual text colors
 */

// ERROR: Undefined variable
console.log(undefinedVariable);

// ERROR: Undefined function
nonexistentFunction();

// WARNING: Unused variable
const unusedVariable = "I'm never used";

// ERROR: Type error (if using TypeScript or JSDoc)
/**
 * @param {string} name
 * @param {number} age
 */
function greet(name, age) {
  console.log(`Hello ${name}, you are ${age}`);
}
greet("Alice", "not a number");  // Type mismatch

// WARNING: Unreachable code
function earlyReturn() {
  return "done";
  console.log("Never executed");  // Unreachable
}

// ERROR: Invalid property access
const obj = {};
console.log(obj.nonexistent.nested.property);

// WARNING: Comparison with different types
if ("5" == 5) {  // Should use ===
  console.log("loose equality");
}

// ERROR: Missing parameter
greet("Bob");  // Missing age parameter

// INFO: Unnecessary type assertion (TypeScript)
const num = 123;
const str = String(num);  // Could be simplified

// HINT: Variable can be const instead of let
let neverReassigned = "should be const";
console.log(neverReassigned);

// ERROR: Division by zero (some linters catch this)
const result = 10 / 0;

// WARNING: Duplicate case label
const value = 1;
switch (value) {
  case 1:
    console.log("one");
    break;
  case 1:  // Duplicate case
    console.log("one again");
    break;
}

// ERROR: Invalid this context
const obj2 = {
  name: "test",
  greet: () => {
    console.log(this.name);  // Arrow function doesn't bind this
  }
};

console.log("JavaScript diagnostic test complete!");