using System.CommandLine;
using Humanizer;
using MycroForge.CLI.Commands.Interfaces;

namespace MycroForge.CLI.Commands;

public partial class MycroForge
{
    public partial class Generate
    {
        public class Service : Command, ISubCommandOf<Generate>
        {
            private static readonly Argument<string> NameArgument =
                new(name: "name", description: "The name of the service");

            private static readonly Option<bool> WithSession =
                new(name: "--with-session", description: "Create a service that uses database sessions");


            private static readonly string[] DefaultTemplate =
            [
                "class %class_name%:",
                "",
                "\tdef do_stuff(self, stuff: str) -> str:",
                "\t\treturn f\"Hey, I'm doing stuff!\""
            ];

            private static readonly string[] WithSessionTemplate =
            [
                "from orm.engine.async_session import async_session",
                "# from orm.entities.user import User",
                "",
                "class %class_name%:",
                "",
                "\tasync def do_stuff(self, stuff: str) -> str:",
                "\t\tasync with async_session() as session():",
                "\t\t\t# stmt = select(User).where(User.firstname == \"John\")",
                "\t\t\t# results = await session.scalars(stmt).all()",
                "\t\t\t# print(len(results))",
                "\t\t\tpass",
                "\t\treturn f\"Hey, I'm doing stuff!\""
            ];

            private readonly ProjectContext _context;

            public Service(ProjectContext context) : base("service", "Generate a service")
            {
                _context = context;
                AddAlias("s");
                AddOption(WithSession);
                this.SetHandler(ExecuteAsync, NameArgument, WithSession);
            }

            private async Task ExecuteAsync(string name, bool withSession)
            {
                _context.AssertDirectoryExists("services");

                var className = Path.GetFileName(name).Pascalize();
                var code = string.Join('\n', withSession ? WithSessionTemplate : DefaultTemplate)
                    .Replace("%class_name%", className);

                await _context.CreateFile($"services/{name.Underscore().ToLower()}.py", code);
            }
        }
    }
}