namespace MultiversalDiplomacy.Script;

/// <summary>
/// A script handler for the interactive repl.
/// </summary>
public class ReplScriptHandler : IScriptHandler
{
    public string Prompt => "5dp> ";

    public IScriptHandler? HandleInput(string input)
    {
        var args = input.Split(' ', StringSplitOptions.RemoveEmptyEntries);
        if (args.Length == 0)
        {
            return this;
        }

        var command = args[0];
        switch (command)
        {
            case "help":
            case "?":
                Console.WriteLine("commands:");
                Console.WriteLine("  help, ?: print this message");
                Console.WriteLine("  stab: stab");
                Console.WriteLine("  new: start a new game");
                break;

            case "stab":
                Console.WriteLine("stab");
                break;

            case "new" when args.Length == 1:
                Console.WriteLine("usage:");
                Console.WriteLine("  new blank: standard map, no units");
                Console.WriteLine("  new standard: standard map, standard units");
                break;

            case "new" when args[1] == "blank":
                var world = MultiversalDiplomacy.Model.World.WithStandardMap();
                var handler = new GameScriptHandler(world);
                Console.WriteLine("Created an empty game");
                return handler;

            case "new" when args[1] == "standard":
                world = GameController.InitializeWorld();
                handler = new GameScriptHandler(world);
                Console.WriteLine("Created a standard game");
                return handler;

            default:
                Console.WriteLine("Unrecognized command");
                break;
        }

        return this;
    }
}