<?php
/**
 * Test file for PHP LSP diagnostics
 * Tests error, warning, info, and hint virtual text colors
 * 
 * Note: Configure Intelephense to show different diagnostic levels:
 * - diagnostics.undefinedSymbols = true (errors)
 * - diagnostics.undefinedVariables = true (warnings)
 * - diagnostics.unusedSymbols = "hint" (hints)
 */

// Define some valid functions and variables first to avoid cascading errors
function validFunction(): void {
    echo "This is valid\n";
}

$definedVariable = "I exist";

// ERROR: Undefined function
someUndefinedFunction();

// ERROR: Undefined variable
echo $completelyUndefined;

// WARNING/HINT: Unused variable (depends on Intelephense config)
$unused = "Never used anywhere";

// Valid code to separate errors
validFunction();

// ERROR: Wrong number of arguments
function requiresTwoArgs(string $a, string $b): void {
    echo "$a $b\n";
}
requiresTwoArgs("only one");  // Missing second argument

// ERROR: Type mismatch
function expectsString(string $param): void {
    echo $param;
}
expectsString(123);  // Passing int to string parameter

// WARNING: Variable might not be defined in all code paths
if (rand(0, 1)) {
    $maybeUndefined = "sometimes defined";
}
// Commenting out to reduce errors: echo $maybeUndefined;

// Valid usage
echo $definedVariable . "\n";

// ERROR: Calling method on non-object
$notAnObject = "string";
$notAnObject->someMethod();

// ERROR: Invalid array access (multiple levels)
$emptyArray = [];
echo $emptyArray['key']['nested']['deep'];

// Valid function call
requiresTwoArgs("hello", "world");

// HINT/WARNING: Unreachable code (some configs)
function hasDeadCode(): string {
    return "done";
    echo "This is unreachable";  // Dead code
}

echo "Test complete!\n";