using System;
using System.Runtime.InteropServices;

namespace Cryville.Common.Unity {
	public static class UrlOpener {
		public static void Open(string url) {
#if UNITY_STANDALONE_WIN || UNITY_EDITOR_WIN
			url += "\0";
			unsafe {
				fixed (char* lpFile = url) {
					var info = new SHELLEXECUTEINFOW {
						cbSize = (uint)sizeof(SHELLEXECUTEINFOW),
						fMask = 0x0540,
						lpFile = lpFile,
						nShow = 1,
					};
					ShellExecuteExW(ref info);
				}
			}
#elif UNITY_ANDROID
			using (var clazz = new UnityEngine.AndroidJavaClass("world.cryville.common.unity.UrlOpener")) {
				clazz.CallStatic("open", url);
			}
#else
#error Unknown platform.
#endif
		}
		public static void OpenThreaded(string url) {
#if UNITY_STANDALONE_WIN || UNITY_EDITOR_WIN
			Open(url);
#elif UNITY_ANDROID
			UnityEngine.AndroidJNI.AttachCurrentThread();
			Open(url);
			UnityEngine.AndroidJNI.DetachCurrentThread();
#else
#error Unknown platform.
#endif
		}

#if UNITY_STANDALONE_WIN || UNITY_EDITOR_WIN
		[DllImport("shell32.dll")]
		static extern void ShellExecuteExW(ref SHELLEXECUTEINFOW pExecInfo);
		unsafe struct SHELLEXECUTEINFOW {
			public uint cbSize;
			public uint fMask;
			public IntPtr hwnd;
			public char* lpVerb;
			public char* lpFile;
			public char* lpParameters;
			public char* lpDirectory;
			public int nShow;
			public IntPtr hInstApp;
			public IntPtr lpIDList;
			public IntPtr lpClass;
			public IntPtr hkeyClass;
			public uint dwHotKey;
			public IntPtr hIconMonitor;
			public IntPtr hProcess;
		}
#endif
	}
}