using System.Text.RegularExpressions;

using MultiversalDiplomacy.Model;

namespace MultiversalDiplomacy.Script;

public class AdjudicationQueryScriptHandler(World world, bool strict = false) : IScriptHandler
{
    public string Prompt => "valid> ";

    public World World { get; private set; } = world;

    /// <summary>
    /// Whether unsuccessful commands should terminate the script.
    /// </summary>
    public bool Strict { get; } = strict;

    public IScriptHandler? HandleInput(string input)
    {
        var args = input.Split(' ', 2, StringSplitOptions.RemoveEmptyEntries);
        if (args.Length == 0 || input.StartsWith('#'))
        {
            return this;
        }

        var command = args[0];
        switch (command)
        {
            case "---":
                Console.WriteLine("Ready for orders");
                return new GameScriptHandler(World, Strict);

            case "assert" when args.Length == 1:
                Console.WriteLine("Usage:");
                break;

            case "assert":
                return HandleAssertion(args[1]);

            case "status":
                throw new NotImplementedException();

            default:
                Console.WriteLine($"Unrecognized command: \"{command}\"");
                if (Strict) return null;
                break;
        }

        return this;
    }

    private AdjudicationQueryScriptHandler? HandleAssertion(string assertion)
    {
        // Simple assertions
        switch (assertion)
        {
            case "true":
                return this;

            case "false":
                return null;
        }
            
        Console.WriteLine("Order lookup not implemented yet");
        return this;
    }
}