<?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 = array();
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";