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

#nullable disable

using Microsoft.Build.Evaluation;
using Microsoft.DotNet.Cli.Utils;
using Microsoft.DotNet.Cli.Utils.Extensions;
using NuGet.Frameworks;
using NuGet.ProjectModel;

namespace Microsoft.DotNet.Cli.CommandFactory.CommandResolution;

internal class MSBuildProject : IProject
{
    private static readonly NuGetFramework s_toolPackageFramework = FrameworkConstants.CommonFrameworks.NetCoreApp10;

    private readonly Project _project;
    private readonly string _msBuildExePath;

    public string DepsJsonPath
    {
        get
        {
            return _project
                .AllEvaluatedProperties
                .FirstOrDefault(p => p.Name.Equals("ProjectDepsFilePath"))
                .EvaluatedValue;
        }
    }

    public string RuntimeConfigJsonPath
    {
        get
        {
            return _project
                .AllEvaluatedProperties
                .FirstOrDefault(p => p.Name.Equals("ProjectRuntimeConfigFilePath"))
                .EvaluatedValue;
        }
    }

    public string FullOutputPath
    {
        get
        {
            return _project
                .AllEvaluatedProperties
                .FirstOrDefault(p => p.Name.Equals("TargetDir"))
                .EvaluatedValue;
        }
    }

    public string ProjectRoot { get; }

    public NuGetFramework DotnetCliToolTargetFramework
    {
        get
        {
            var frameworkString = _project
                .AllEvaluatedProperties
                .FirstOrDefault(p => p.Name.Equals("DotnetCliToolTargetFramework"))
                ?.EvaluatedValue;

            if (string.IsNullOrEmpty(frameworkString))
            {
                return s_toolPackageFramework;
            }

            return NuGetFramework.Parse(frameworkString);
        }
    }


    public Dictionary<string, string> EnvironmentVariables
    {
        get
        {
            return new Dictionary<string, string>
            {
                { Constants.MSBUILD_EXE_PATH, _msBuildExePath }
            };
        }
    }

    public string ToolDepsJsonGeneratorProject
    {
        get
        {
            var generatorProject = _project
                .AllEvaluatedProperties
                .FirstOrDefault(p => p.Name.Equals("ToolDepsJsonGeneratorProject"))
                ?.EvaluatedValue;

            return generatorProject;
        }
    }

    public MSBuildProject(
        string msBuildProjectPath,
        NuGetFramework framework,
        string configuration,
        string outputPath,
        string msBuildExePath)
    {
        ProjectRoot = msBuildExePath;

        var globalProperties = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
        {
           { "MSBuildExtensionsPath", Path.GetDirectoryName(msBuildExePath) }
        };

        if (framework != null)
        {
            globalProperties.Add("TargetFramework", framework.GetShortFolderName());
        }

        if (outputPath != null)
        {
            globalProperties.Add("OutputPath", outputPath);
        }

        if (configuration != null)
        {
            globalProperties.Add("Configuration", configuration);
        }

        _project = ProjectCollection.GlobalProjectCollection.LoadProject(
            msBuildProjectPath,
            globalProperties,
            null);

        _msBuildExePath = msBuildExePath;
    }

    public IEnumerable<SingleProjectInfo> GetTools()
    {
        var toolsReferences = _project.AllEvaluatedItems.Where(i => i.ItemType.Equals("DotNetCliToolReference"));
        var tools = toolsReferences.Select(t => new SingleProjectInfo(t.EvaluatedInclude, t.GetMetadataValue("Version"), []));

        return tools;
    }

    public LockFile GetLockFile()
    {
        var lockFilePath = GetLockFilePathFromProjectLockFileProperty() ??
            GetLockFilePathFromIntermediateBaseOutputPath();

        return new LockFileFormat()
            .ReadWithLock(lockFilePath)
            .Result;
    }

    public bool TryGetLockFile(out LockFile lockFile)
    {
        lockFile = null;

        var lockFilePath = GetLockFilePathFromProjectLockFileProperty() ??
            GetLockFilePathFromIntermediateBaseOutputPath();

        if (lockFilePath == null)
        {
            return false;
        }

        if (!File.Exists(lockFilePath))
        {
            return false;
        }

        lockFile = new LockFileFormat()
            .ReadWithLock(lockFilePath)
            .Result;
        return true;
    }

    private string GetLockFilePathFromProjectLockFileProperty()
    {
        return _project
            .AllEvaluatedProperties
            .Where(p => p.Name.Equals("ProjectAssetsFile"))
            .Select(p => p.EvaluatedValue)
            .FirstOrDefault(p => Path.IsPathRooted(p) && File.Exists(p));
    }

    private string GetLockFilePathFromIntermediateBaseOutputPath()
    {
        var intermediateOutputPath = _project
                .AllEvaluatedProperties
                .FirstOrDefault(p => p.Name.Equals("BaseIntermediateOutputPath"))
                .EvaluatedValue;
        return Path.Combine(intermediateOutputPath, "project.assets.json");
    }
}