// <copyright file="ShellWindowsApi.cs" company="PlaceholderCompany">
// Copyright (c) PlaceholderCompany. All rights reserved.
// </copyright>

namespace SystemTrayMenu.DllImports
{
    using System;
    using System.Runtime.InteropServices;
    using System.Runtime.Versioning;
    using System.Text;

    /// <summary>
    /// wraps the methodcalls to native windows dll's.
    /// </summary>
    public static partial class NativeMethods
    {
        [SupportedOSPlatform("windows")]
        [DllImport("Shell32.dll", EntryPoint = "SHGetFileInfo", SetLastError = true, CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Winapi)]
        [DefaultDllImportSearchPaths(DllImportSearchPath.UserDirectories)]
        internal static extern IntPtr Shell32SHGetFileInfo(
           string pszPath,
           uint dwFileAttributes,
           ref SHFILEINFO psfi,
           uint cbFileInfo,
           uint uFlags);

        // Retrieves the IShellFolder interface for the desktop folder, which is the root of the Shell's namespace.
        [SupportedOSPlatform("windows")]
        [DllImport("shell32.dll", EntryPoint = "SHGetDesktopFolder", SetLastError = true, CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Winapi)]
        [DefaultDllImportSearchPaths(DllImportSearchPath.UserDirectories)]
        internal static extern int Shell32SHGetDesktopFolder(out IntPtr ppshf);

        [SupportedOSPlatform("windows")]
        [DllImport("shlwapi.dll", EntryPoint = "StrCmpLogicalW", ExactSpelling = true, SetLastError = true, CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Winapi)]
        [DefaultDllImportSearchPaths(DllImportSearchPath.UserDirectories)]
        internal static extern int ShlwapiStrCmpLogicalW(string x, string y);

        // Takes a STRRET structure returned by IShellFolder::GetDisplayNameOf, converts it to a string, and places the result in a buffer.
        [SupportedOSPlatform("windows")]
        [DllImport("shlwapi.dll", EntryPoint = "StrRetToBuf", ExactSpelling = false, SetLastError = true, CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Winapi)]
        [DefaultDllImportSearchPaths(DllImportSearchPath.UserDirectories)]
        internal static extern int ShlwapiStrRetToBuf(IntPtr pstr, IntPtr pidl, StringBuilder pszBuf, int cchBuf);

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct SHFILEINFO
        {
            public IntPtr hIcon;
            public int iIcon;
            public uint dwAttributes;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PATH)]
            public string szDisplayName;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = NAMESIZE)]
            public string szTypeName;

            private const int NAMESIZE = 80;
            private const int MAX_PATH = 256;
        }
    }
}