using System.Runtime.InteropServices;

#if DEBUG

// Use the simple DLL name so the loader resolves the copy placed next to the

// executable during build. The previous relative path fails when the process

// working directory differs from the repo root.

const string NativeScriptLibrary = "nativescript";

#else

const string NativeScriptLibrary = "nativescript";

#endif

[DllImport(NativeScriptLibrary, EntryPoint = nameof(runtime_init))]

static extern Int64 runtime_init([MarshalAs(UnmanagedType.LPUTF8Str)] string entry);

[DllImport(NativeScriptLibrary, EntryPoint = nameof(runtime_deinit))]

static extern void runtime_deinit(Int64 runtime);

[DllImport(NativeScriptLibrary, EntryPoint = nameof(runtime_runscript))]

static extern void runtime_runscript(Int64 runtime, [MarshalAs(UnmanagedType.LPUTF8Str)] string entry, [MarshalAs(UnmanagedType.LPUTF8Str)] string filename);

#if DEBUG

[DllImport(NativeScriptLibrary, EntryPoint = nameof(runtime_devtools_start))]

static extern IntPtr runtime_devtools_start(long runtime, ushort port);

[DllImport(NativeScriptLibrary, EntryPoint = nameof(runtime_free_string))]

static extern void runtime_free_string(IntPtr ptr);

#endif

var baseDir = AppDomain.CurrentDomain.BaseDirectory;

var lowerEntry = Path.Combine(baseDir, "app", "main.js");

var upperEntry = Path.Combine(baseDir, "App", "main.js");

string entry = System.IO.File.Exists(lowerEntry) ? lowerEntry : upperEntry;

Int64 runtime = runtime_init(AppContext.BaseDirectory);

#if DEBUG

IntPtr devtoolsPtr = IntPtr.Zero;

try {

// runtime_devtools_start may not be present in non-devtools builds of the

// native DLL; guard the call and continue if the symbol is missing.

devtoolsPtr = runtime_devtools_start(runtime, 42000);

} catch (EntryPointNotFoundException) {

devtoolsPtr = IntPtr.Zero;

}

if (devtoolsPtr != IntPtr.Zero)

{

try {

var ws = Marshal.PtrToStringUTF8(devtoolsPtr);

try { runtime_free_string(devtoolsPtr); } catch (EntryPointNotFoundException) { }

if (!string.IsNullOrEmpty(ws)) Console.WriteLine($"[NativeScript DevTools] {ws}");

} catch (Exception) {

// Ignore any errors reading the devtools string.

}

}

#endif

var script = File.ReadAllText(Path.GetFullPath(entry));

runtime_runscript(runtime, script, Path.GetFileName(entry));

Console.WriteLine("Hello, World!");

runtime_deinit(runtime);