// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using MSBuildProject = Microsoft.Build.Evaluation.Project;

namespace Microsoft.DotNet.Cli.Commands.New.MSBuildEvaluation;

/// <summary>
/// Represents MSBuild evaluation result.
/// For success results, <see cref="SDKStyleEvaluationResult"/>, <see cref="NonSDKStyleEvaluationResult"/>, <see cref="MultiTargetEvaluationResult"/> are used depending on the evaluated project.
/// </summary>
internal class MSBuildEvaluationResult
{
    protected MSBuildEvaluationResult(EvalStatus status)
    {
        Status = status;
    }

    protected MSBuildEvaluationResult(EvalStatus status, string projectPath)
    {
        Status = status;
        ProjectPath = projectPath;

        string extension = Path.GetExtension(projectPath);
        Language = extension.ToLowerInvariant() switch
        {
            "csproj" => DotNetLanguage.CSharp,
            "fsproj" => DotNetLanguage.FSharp,
            "vbproj" => DotNetLanguage.VB,
            _ => DotNetLanguage.NotEvaluated
        };
    }

    internal enum EvalStatus { NotEvaluated, NoProjectFound, MultipleProjectFound, NoRestore, Succeeded, Failed }

    internal enum DotNetLanguage { NotEvaluated, CSharp, VB, FSharp }

    internal EvalStatus Status { get; }

    internal DotNetLanguage Language { get; private set; }

    internal string? ProjectPath { get; }

    public MSBuildProject? EvaluatedProject { get; protected set; }

    public string? ErrorMessage { get; protected set; }

    internal static MSBuildEvaluationResult CreateNoProjectFound(string path)
    {
        return new MSBuildEvaluationResult(EvalStatus.NoProjectFound)
        {
            ErrorMessage = string.Format(CliCommandStrings.MSBuildEvaluationResult_Error_NoProjectFound, path)
        };
    }

    internal static MSBuildEvaluationResult CreateNoRestore(string path)
    {
        return new MSBuildEvaluationResult(EvalStatus.NoRestore, path)
        {
            ErrorMessage = string.Format(CliCommandStrings.MSBuildEvaluationResult_Error_NotRestored, path)
        };
    }

    internal static MSBuildEvaluationResult CreateFailure(string path, string errorMessage)
    {
        return new MSBuildEvaluationResult(EvalStatus.Failed, path)
        {
            ErrorMessage = errorMessage,
        };
    }
}