// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Diagnostics.CodeAnalysis;
using Microsoft.VisualStudio.Shell.Interop;
 
namespace Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem;
 
internal static class IVsHierarchyExtensions
{
    public static bool TryGetItemProperty<T>(this IVsHierarchy hierarchy, uint itemId, int propertyId, [MaybeNullWhen(false)] out T value)
    {
        if (ErrorHandler.Failed(hierarchy.GetProperty(itemId, propertyId, out var property)) ||
            !(property is T))
        {
            value = default;
            return false;
        }
 
        value = (T)property;
 
        return true;
    }
 
    public static bool TryGetProperty<T>(this IVsHierarchy hierarchy, int propertyId, [MaybeNullWhen(false)] out T value)
    {
        const uint root = VSConstants.VSITEMID_ROOT;
        return hierarchy.TryGetItemProperty(root, propertyId, out value);
    }
 
    public static bool TryGetProperty<T>(this IVsHierarchy hierarchy, __VSHPROPID propertyId, [MaybeNullWhen(false)] out T value)
        => hierarchy.TryGetProperty((int)propertyId, out value);
 
    public static bool TryGetItemProperty<T>(this IVsHierarchy hierarchy, uint itemId, __VSHPROPID propertyId, [MaybeNullWhen(false)] out T value)
        => hierarchy.TryGetItemProperty(itemId, (int)propertyId, out value);
 
    public static bool TryGetGuidProperty(this IVsHierarchy hierarchy, int propertyId, out Guid guid)
        => ErrorHandler.Succeeded(hierarchy.GetGuidProperty(VSConstants.VSITEMID_ROOT, propertyId, out guid));
 
    public static bool TryGetGuidProperty(this IVsHierarchy hierarchy, __VSHPROPID propertyId, out Guid guid)
        => ErrorHandler.Succeeded(hierarchy.GetGuidProperty(VSConstants.VSITEMID_ROOT, (int)propertyId, out guid));
 
    public static bool TryGetProject(this IVsHierarchy hierarchy, [NotNullWhen(returnValue: true)] out EnvDTE.Project? project)
        => hierarchy.TryGetProperty<EnvDTE.Project>(__VSHPROPID.VSHPROPID_ExtObject, out project);
 
    public static bool TryGetName(this IVsHierarchy hierarchy, [NotNullWhen(returnValue: true)] out string? name)
        => hierarchy.TryGetProperty<string>(__VSHPROPID.VSHPROPID_Name, out name);
 
    public static bool TryGetItemName(this IVsHierarchy hierarchy, uint itemId, [NotNullWhen(returnValue: true)] out string? name)
        => hierarchy.TryGetItemProperty<string>(itemId, __VSHPROPID.VSHPROPID_Name, out name);
 
    public static bool TryGetCanonicalName(this IVsHierarchy hierarchy, uint itemId, [NotNullWhen(returnValue: true)] out string? name)
        => ErrorHandler.Succeeded(hierarchy.GetCanonicalName(itemId, out name));
 
    public static bool TryGetParentHierarchy(this IVsHierarchy hierarchy, [NotNullWhen(returnValue: true)] out IVsHierarchy? parentHierarchy)
        => hierarchy.TryGetProperty<IVsHierarchy>(__VSHPROPID.VSHPROPID_ParentHierarchy, out parentHierarchy);
 
    public static bool TryGetTypeGuid(this IVsHierarchy hierarchy, out Guid typeGuid)
        => hierarchy.TryGetGuidProperty(__VSHPROPID.VSHPROPID_TypeGuid, out typeGuid);
 
    public static bool TryGetTargetFrameworkMoniker(this IVsHierarchy hierarchy, uint itemId, [NotNullWhen(returnValue: true)] out string? targetFrameworkMoniker)
        => hierarchy.TryGetItemProperty<string>(itemId, (int)__VSHPROPID4.VSHPROPID_TargetFrameworkMoniker, out targetFrameworkMoniker);
 
    public static uint TryGetItemId(this IVsHierarchy hierarchy, string moniker)
    {
        if (ErrorHandler.Succeeded(hierarchy.ParseCanonicalName(moniker, out var itemid)))
        {
            return itemid;
        }
 
        return VSConstants.VSITEMID_NIL;
    }
 
    public static string? TryGetProjectFilePath(this IVsHierarchy hierarchy)
    {
        if (ErrorHandler.Succeeded(((IVsProject3)hierarchy).GetMkDocument((uint)VSConstants.VSITEMID.Root, out var projectFilePath)) && !string.IsNullOrEmpty(projectFilePath))
        {
            return projectFilePath;
        }
 
        return null;
    }
}