using System;
using Sleis.Utility;
using Sleis.Validation.Spring;
using Sleis.ViewModels;
using System.Text;

namespace Sleis.Service
{
    public class ValidationService : BaseService
	{
        private const char DEFAULT_CONTEXT_INDIXATOR = '~';

        public ObjectValidator Validator { get; set; }

		public new void Init()
		{
			base.Init();

            ArgumentValidationUtility.ThrowOnNull(Validator, "Validator");
		}


        public ListView<RuleError> ValidateReport(ReportValidationView subject, params object[] args)
        {
            Log.DebugFormat("Validate(subject: {0} args: {1}", subject, args);

            if (subject == null)
            {
                throw new ArgumentNullException("subject");
            }

            //Set the validation context so that each identity can describe
            //itself in a context of its parent
            subject.SetContext(DEFAULT_CONTEXT_INDIXATOR.ToString());

            //Create a result
            ListView<RuleError> result = new ListView<RuleError>();
            result.List = Validator.Validate(subject);                               
            //Parse error context for each 
            foreach (RuleError rule in result.List)
            {
                int contextIndex = rule.Message.IndexOf(DEFAULT_CONTEXT_INDIXATOR);
                if (contextIndex > -1)
                {
                    rule.Context = rule.Message.Substring(contextIndex + 1).Trim();
                    rule.Message = rule.Message.Substring(0, contextIndex - 1).Trim();
                }
                else
                {
                    rule.Context = String.Format("Context Undefined for: {0}", rule.MessageProvider);
                }
            }


            Log.DebugFormat("Result: {0}", result);

            return result;
        }


        



	}
}