using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using Sleis.Validation.Spring;

namespace Sleis.Models.ErrorHandling
{
    public class CsvParserError : Exception
    {
        public Dictionary<long, List<string>> LineErrors { get; set; }
        string FileName { get; set; }
        public CsvParserError()
        {
            LineErrors = new Dictionary<long, List<string>>();
        }
        public CsvParserError(string fileName) : this()
        {
            FileName = fileName;
        }
        public void AddLineError(long lineNumber, string message)
        {
            if (LineErrors.ContainsKey(lineNumber))
            {
                LineErrors[lineNumber].Add(message);
            }
            else
            {
                LineErrors.Add(lineNumber, new List<string>() { message});
            }
        }
        public void AddLineError(long lineNumber,string columnName, string message)
        {
            if (LineErrors.ContainsKey(lineNumber))
            {
                LineErrors[lineNumber].Add(String.Format("Column {0}: {1}", columnName, message));
            }
            else
            {
                LineErrors.Add(lineNumber, new List<string>() { String.Format("Column {0}: {1}", columnName, message) });
            }

        }
        public bool HasErrors
        {
            get { return LineErrors.Count > 0; }
        }
        public override string Message
        {
            get            
            { 
                StringBuilder sb = new StringBuilder("Errors were found on the CSV File. ");
                foreach (long key in LineErrors.Keys.OrderBy(k=>k))
                {
                    foreach (string message in LineErrors[key])
                    {
                        sb.AppendLine(String.Format("Line {0}: {1}", key, message));
                    }
                }
                return sb.ToString();
            }
        }
        public string HtmlMessage
        {
            get { return Message.Replace(Environment.NewLine, "<br />"); }
        }
        public List<RuleError> ToRuleErrorList()
        {
            List<RuleError> errors = new List<RuleError>();
            foreach (long key in LineErrors.Keys.OrderBy(k => k))
            {
                foreach (string message in LineErrors[key])
                {
                    RuleError err = new RuleError(null, message);                    
                    err.Context = String.Format("{0} Line {1}", FileName, key);
                    errors.Add(err);
                }
            }
            return errors;
        }
    }
}