/***************************************************************************************************
 Copyright (C) 2025 The Qt Company Ltd.
 SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
***************************************************************************************************/

using System;
using System.Diagnostics;
using System.IO;

namespace Test_Qt.DotNet.Project
{
    public static class MsBuild
    {
        public static string MsBuildPath { get; private set; }

        private static readonly object criticalSection = new();
        private static Exception initError = null;

        private static void CheckInstallPath(string path)
        {
            if (File.Exists(MsBuildPath))
                return;
            if (!Directory.Exists(path))
                return;
            var test = Path.Combine(path, "MSBuild", "Current", "Bin", "amd64", "MSBuild.exe");
            if (!File.Exists(test))
                return;
            MsBuildPath = test;
        }

        private static void Init()
        {
            lock (criticalSection) {
                if (File.Exists(MsBuildPath))
                    return;
                if (initError != null)
                    throw initError;
                var vswherePath = Path.Combine(
                    Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86),
                    "Microsoft Visual Studio", "Installer", "vswhere.exe");
                if (!File.Exists(vswherePath))
                    throw initError = new InvalidOperationException("VS Locator tool not found.");

                CmdProc.Start(vswherePath, Environment.CurrentDirectory, stdOut: CheckInstallPath,
                    args: ["-version", "[17.0,18.0)", "-latest", "-property", "installationPath"])
                    .WaitForExit();

                if (!File.Exists(MsBuildPath))
                    throw initError = new InvalidOperationException("MSBuild tool not found.");
            }
        }

        public static Process Start(string workDir, params string[] args)
        {
            Init();
            return CmdProc.Start(MsBuildPath, workDir, args);
        }

        public static Process Start(
            Action<string> stdOut, Action<string> stdErr, string workDir, params string[] args)
        {
            Init();
            return CmdProc.Start(MsBuildPath, workDir, args, stdOut, stdErr);
        }
    }
}