using Nerfed.Runtime;
using System.Reflection;
using System.Text.Json;

namespace Nerfed.Editor.Project;

public class ProjectConfig
{
    public string Name { get; set; }
    public uint Version { get; set; }
    public string RuntimeProject { get; set; }
}

internal static class Project
{
    private const string projectFileName = ".project";

    internal static ProjectConfig LoadedConfig { get; private set; }
    internal static string ProjectDirectory { get; private set; }
    internal static string ProjectContentDirectory { get; private set; }
    internal static string ProjectTempDirectory { get; private set; }

    internal static bool Create(string path, string projectName)
    {
        // Check if folder is empty.
        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }

        if(Directory.GetFiles(path).Length != 0)
        {
            Log.Error($"Directory {path} is not empty!");
            return false;
        }

        // Create project file.
        ProjectConfig projectConfig = new ProjectConfig
        {
            Name = projectName,
            Version = /*Nerfed.Runtime.Verion*/ 1,
        };

        // Create solution.
        GenerateSolution(path, projectConfig);

        string projectFilePath = Path.Combine(path, projectFileName);
        SaveProject(projectFilePath, projectConfig);

        // Open the project.
        Open(projectFilePath);

        Log.Info($"Succesfully created project.");
        return true;
    }

    internal static bool Open(string path)
    {
        string projectFilePath = path;

        if (!File.Exists(projectFilePath)) {
            projectFilePath = Path.Combine(path, projectFileName);
            if (!File.Exists(projectFilePath))
            {
                Log.Error($"Project file not found at {path} or {projectFilePath}");
                return false;
            }
        }

        // Load from file.
        string jsonString = File.ReadAllText(projectFilePath);
        ProjectConfig projectConfig = JsonSerializer.Deserialize<ProjectConfig>(jsonString);

        // Check version.
        if(projectConfig.Version != /*Nerfed.Runtime.Verion*/ 1)
        {
            Log.Error($"Project runtime version does not match editor runtime verion!");
            return false;
        }

        LoadedConfig = projectConfig;
        SetupDefaultFolders(Path.GetDirectoryName(projectFilePath));
        Log.Info($"Opened project: {projectConfig.Name}");

        return true;
    }

    internal static bool SaveProject(string path, ProjectConfig projectConfig)
    {
        JsonSerializerOptions options = new JsonSerializerOptions(JsonSerializerOptions.Default)
        {
            WriteIndented = true,
        };

        string jsonString = JsonSerializer.Serialize(projectConfig, options);

        File.WriteAllText(path, jsonString);

        return true;
    }

    // Compile the project using the builder.
    internal static bool CompileProject()
    {
        //GenerateSolution();
        //dotnet build <sln>

        return false;
    }

    private static void GenerateSolution(string path, ProjectConfig projectConfig)
    {
        GenerateCSProjectFiles(path, projectConfig);

        Log.Info("Generating solution file");
        string solution =
$@"
Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.10.35013.160
MinimumVisualStudioVersion = 10.0.40219.1
Project(""{{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}}"") = ""{projectConfig.Name}.Runtime"", ""{projectConfig.Name}.Runtime.csproj"", ""{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}""
EndProject
Global
	GlobalSection(SolutionConfigurationPlatforms) = preSolution
		Test|x64 = Test|x64
		Release|x64 = Release|x64
		Debug|x64 = Debug|x64
	EndGlobalSection
	GlobalSection(ProjectConfigurationPlatforms) = postSolution
		{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}.Test|x64.ActiveCfg = Test|x64
		{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}.Test|x64.Build.0 = Test|x64
		{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}.Release|x64.ActiveCfg = Release|x64
		{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}.Release|x64.Build.0 = Release|x64
		{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}.Debug|x64.ActiveCfg = Debug|x64
		{{B04FAEF8-7D91-43A9-81C5-4BD3217B0C23}}.Debug|x64.Build.0 = Debug|x64
	EndGlobalSection
	GlobalSection(SolutionProperties) = preSolution
		HideSolutionNode = FALSE
	EndGlobalSection
	GlobalSection(ExtensibilityGlobals) = postSolution
		SolutionGuid = {{117DD74B-A4DC-48CE-B782-C7AE565A9270}}
	EndGlobalSection
EndGlobal
";

        string solutionName = projectConfig.Name + ".sln";
        string filePath = Path.Combine(path, solutionName);

        File.WriteAllText(filePath, solution);
    }

    // Inspirered by https://github.com/ProwlEngine/Prowl/blob/main/Prowl.Editor/Project.cs
    // Maybe the builder should do this?
    // When compiling the 'runtimeAssembly.Location' needs to be updated to where ever the one is that is being used.
    private static void GenerateCSProjectFiles(string path, ProjectConfig projectConfig)
    {
        Log.Info("Generating CS project files");

        Assembly[] loadedAssemblies = AppDomain.CurrentDomain.GetAssemblies();
        Assembly runtimeAssembly = loadedAssemblies.FirstOrDefault(assembly => assembly.GetName().Name == "Nerfed.Runtime") ?? throw new Exception("Failed to find Runtime Assembly!");

        string propertyGroup =
$@"
    <PropertyGroup>
        <TargetFramework>net8.0</TargetFramework>
        <ImplicitUsings>enable</ImplicitUsings>
        <Nullable>disable</Nullable>
        <PublishAot>true</PublishAot>
        <InvariantGlobalization>true</InvariantGlobalization>
        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
        <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
        <IsPackable>false</IsPackable>
        <Configurations>Debug;Test;Release</Configurations>
        <Platforms>x64</Platforms>
    </PropertyGroup>

    <PropertyGroup Condition="" '$(Configuration)|$(Platform)' == 'Debug|x64' "">
        <DefineConstants>TRACE;LOG_INFO;PROFILING</DefineConstants>
    </PropertyGroup>

    <PropertyGroup Condition="" '$(Configuration)|$(Platform)' == 'Test|x64' "">
        <DefineConstants>TRACE;LOG_ERROR;PROFILING</DefineConstants>
        <Optimize>true</Optimize>
    </PropertyGroup>

    <PropertyGroup Condition="" '$(Configuration)|$(Platform)' == 'Release|x64' "">
        <DefineConstants>TRACE;LOG_ERROR</DefineConstants>
        <Optimize>true</Optimize>
    </PropertyGroup>
";

        string runtimeProject =
$@"
<Project Sdk=""Microsoft.NET.Sdk"">
    {propertyGroup}
    
	<ItemGroup>
		<Compile Include=""/Content/Scripts/Runtime/**/*.cs""/>
	</ItemGroup>

    <ItemGroup>
        <Reference Include=""Nerfed.Runtime"">
            <HintPath>{runtimeAssembly.Location}</HintPath>
            <Private>false</Private>
        </Reference>
    </ItemGroup>
</Project>
";

        string runtimeProjectName = projectConfig.Name + ".Runtime.csproj";
        string filePath = Path.Combine(path, runtimeProjectName);

        File.WriteAllText(filePath, runtimeProject);

        projectConfig.RuntimeProject = runtimeProjectName;
        Log.Info($"Generated runtime at {filePath}");

        // TODO: Editor project.
    }

    private static void SetupDefaultFolders(string path)
    {
        ProjectDirectory = path;

        string contentPath = Path.Combine(path, "Content");
        if (!Directory.Exists(contentPath))
        {
            Directory.CreateDirectory(contentPath);
        }
        ProjectContentDirectory = contentPath;
        string scriptsPath = Path.Combine(ProjectContentDirectory, "Scripts");
        if (!Directory.Exists(scriptsPath))
        {
            Directory.CreateDirectory(scriptsPath);
        }
        string scriptsRuntimePath = Path.Combine(scriptsPath, "Runtime");
        if (!Directory.Exists(scriptsRuntimePath))
        {
            Directory.CreateDirectory(scriptsRuntimePath);
        }

        string tempPath = Path.Combine(path, "Temp");
        if (!Directory.Exists(tempPath))
        {
            Directory.CreateDirectory(tempPath);
        }
        ProjectTempDirectory = tempPath;
    }
}