using System.CommandLine;
using Microsoft.Extensions.DependencyInjection;
using MycroForge.CLI.Commands.Interfaces;
using MycroForge.CLI.Features;

namespace MycroForge.CLI.Commands;

public partial class MycroForge
{
    public class Init : Command, ISubCommandOf<MycroForge>
    {
        #region GitIgnore

        private static readonly string[] GitIgnore =
        [
            "# Byte-compiled / optimized / DLL files", "__pycache__/", "*.py[cod]", "*$py.class", "# C extensions",
            "*.so", "# Distribution / packaging", ".Python", "build/", "develop-eggs/", "dist/", "downloads/", "eggs/",
            ".eggs/", "lib/", "lib64/", "parts/", "sdist/", "var/", "wheels/", "share/python-wheels/", "*.egg-info/",
            ".installed.cfg", "*.egg", "MANIFEST", "# PyInstaller",
            "#  Usually these files are written by a python script from a template",
            "#  before PyInstaller builds the exe, so as to inject date/other infos into it.", "*.manifest", "*.spec",
            "# Installer logs", "pip-log.txt", "pip-delete-this-directory.txt", "# Unit test / coverage reports",
            "htmlcov/", ".tox/", ".nox/", ".coverage", ".coverage.*", ".cache", "nosetests.xml", "coverage.xml",
            "*.cover", "*.py,cover", ".hypothesis/", ".pytest_cache/", "cover/", "# Translations", "*.mo", "*.pot",
            "# Django stuff:", "*.log", "local_settings.py", "db.sqlite3", "db.sqlite3-journal", "# Flask stuff:",
            "instance/", ".webassets-cache", "# Scrapy stuff:", ".scrapy", "# Sphinx documentation", "docs/_build/",
            "# PyBuilder", ".pybuilder/", "target/", "# Jupyter Notebook", ".ipynb_checkpoints", "# IPython",
            "profile_default/", "ipython_config.py", "# pyenv",
            "#   For a library or package, you might want to ignore these files since the code is",
            "#   intended to run in multiple environments; otherwise, check them in:", "# .python-version", "# pipenv",
            "#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.",
            "#   However, in case of collaboration, if having platform-specific dependencies or dependencies",
            "#   having no cross-platform support, pipenv may install dependencies that don't work, or not",
            "#   install all needed dependencies.", "#Pipfile.lock", "# poetry",
            "#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.",
            "#   This is especially recommended for binary packages to ensure reproducibility, and is more",
            "#   commonly ignored for libraries.",
            "#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control",
            "#poetry.lock", "# pdm",
            "#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.",
            "#pdm.lock",
            "#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it",
            "#   in version control.", "#   https://pdm.fming.dev/#use-with-ide", ".pdm.toml",
            "# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm", "__pypackages__/",
            "# Celery stuff", "celerybeat-schedule", "celerybeat.pid", "# SageMath parsed files", "*.sage.py",
            "# Environments", ".env", ".venv", "env/", "venv/", "ENV/", "env.bak/", "venv.bak/",
            "# Spyder project settings", ".spyderproject", ".spyproject", "# Rope project settings", ".ropeproject",
            "# mkdocs documentation", "/site", "# mypy", ".mypy_cache/", ".dmypy.json", "dmypy.json",
            "# Pyre type checker", ".pyre/", "# pytype static type analyzer", ".pytype/", "# Cython debug symbols",
            "cython_debug/", "# PyCharm",
            "#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can",
            "#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore",
            "#  and can be added to the global gitignore or merged into this file.  For a more nuclear",
            "#  option (not recommended) you can uncomment the following to ignore the entire idea folder.", "#.idea/"
        ];

        #endregion

        private static readonly Argument<string> NameArgument =
            new(name: "name", description: "The name of your project");

        private static readonly Option<string> EntryPoint =
            new(name: "--entrypoint", description: "The name of the entrypoint file");

        private static readonly Option<string> BranchOption =
            new(name: "--branch", description: "The name of the initial git branch");

        private static readonly Option<IEnumerable<string>> FeaturesOption =
            new(name: "--features", description: "The features to include")
            {
                AllowMultipleArgumentsPerToken = true
            };

        private readonly IServiceProvider _services;

        private readonly List<IFeature> _features;

        public Init(IServiceProvider services) : base("init", "Initialize a new project")
        {
            AddArgument(NameArgument);
            AddOption(EntryPoint);
            AddOption(BranchOption);
            AddOption(FeaturesOption);
            this.SetHandler(ExecuteAsync, NameArgument, EntryPoint, BranchOption, FeaturesOption);

            _services = services;
            _features = _services.GetServices<IFeature>().ToList();
        }

        private async Task ExecuteAsync(string name, string entrypoint, string branch, IEnumerable<string> features)
        {
            var featuresList = features.ToList();
            Validate(featuresList);
            await Initialize(name, entrypoint, branch, featuresList);
        }

        private void Validate(List<string> features)
        {
            foreach (var feature in features)
                if (_features.All(f => f.Name != feature))
                    throw new Exception($"Feature {feature} was not found.");
        }

        private async Task Initialize(string name, string entrypoint, string branch, List<string> features)
        {
            // Create the project directory and change the directory for the ProjectContext
            var projectRoot = await CreateDirectory(name);
            var ctx = _services.GetRequiredService<ProjectContext>();
            ctx.ChangeDirectory(projectRoot);

            // Create the config file and initialize the config
            await ctx.CreateFile("m4g.json", "{}");
            await ctx.LoadConfig(force: true);

            // Create the entrypoint file
            entrypoint = string.IsNullOrEmpty(entrypoint) ? "main.py" : entrypoint;
            await ctx.CreateFile(entrypoint, string.Empty);
            ctx.Config.Entrypoint = entrypoint;

            // Create the default .gitignore
            await ctx.CreateFile(".gitignore", GitIgnore);

            // Create the venv
            await Bash.ExecuteAsync($"python3 -m venv {Path.Combine(projectRoot, ".venv")}");

            // Initialize git
            var _branch = string.IsNullOrEmpty(branch) ? "main" : branch;
            await Bash.ExecuteAsync($"git -c init.defaultBranch={_branch} init {projectRoot}");

            // Initialize features
            if (features.Count > 0)
                await InitializeFeatures(ctx, features);

            Console.WriteLine($"Directory {projectRoot} was successfully initialized");
        }

        private async Task<string> CreateDirectory(string name)
        {
            var directory = Path.Combine(Directory.GetCurrentDirectory(), name);

            if (Directory.Exists(directory))
                throw new Exception($"Directory {directory} already exists.");

            Console.WriteLine($"Creating directory {directory}");

            Directory.CreateDirectory(directory);

            await Bash.ExecuteAsync($"chmod -R 777 {directory}");

            return directory;
        }

        private async Task InitializeFeatures(ProjectContext projectCtx, List<string> features)
        {
            foreach (var feature in features)
                await _features.First(p => p.Name == feature).ExecuteAsync(projectCtx);
        }
    }
}