using System;
using Spectre.Console.Cli.Internal;
using Spectre.Console.Rendering;

namespace Spectre.Console.Cli
{
    /// <summary>
    /// Represents errors that occur during runtime.
    /// </summary>
    public class CommandRuntimeException : CommandAppException
    {
        internal CommandRuntimeException(string message, IRenderable? pretty = null)
            : base(message, pretty)
        {
        }

        internal CommandRuntimeException(string message, Exception ex, IRenderable? pretty = null)
            : base(message, ex, pretty)
        {
        }

        internal static CommandRuntimeException CouldNotResolveType(Type type, Exception? ex = null)
        {
            var message = $"Could not resolve type '{type.FullName}'.";
            if (ex != null)
            {
                // TODO: Show internal stuff here.
                return new CommandRuntimeException(message, ex);
            }

            return new CommandRuntimeException(message);
        }

        internal static CommandRuntimeException MissingRequiredArgument(CommandTree node, CommandArgument argument)
        {
            if (node.Command.Name == Constants.DefaultCommandName)
            {
                return new CommandRuntimeException($"Missing required argument '{argument.Value}'.");
            }

            return new CommandRuntimeException($"Command '{node.Command.Name}' is missing required argument '{argument.Value}'.");
        }

        internal static CommandRuntimeException NoConverterFound(CommandParameter parameter)
        {
            return new CommandRuntimeException($"Could not find converter for type '{parameter.ParameterType.FullName}'.");
        }

        internal static CommandRuntimeException ValidationFailed(ValidationResult result)
        {
            return new CommandRuntimeException(result.Message ?? "Unknown validation error.");
        }

        internal static Exception CouldNotGetSettingsType(Type commandType)
        {
            return new CommandRuntimeException($"Could not get settings type for command of type '{commandType.FullName}'.");
        }
    }
}