using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;

namespace CondoAutomation.CondoCreator
{
    public class CondoCreationInfo
    {
        public string Name;
        public string ShortName;
        public string Url;
        public string BusinessId;
    }

    public class Parser
    {
        public List<CondoCreationInfo> Parse(string fileName)
        {
            try
            {
                if (string.IsNullOrEmpty(fileName))
                {
                    log("Can't parse file: file name is empty");
                    return new List<CondoCreationInfo>();
                }
                log("Start parsing file '{0}'", fileName);

                var lines = new List<string>(File.ReadAllLines(fileName)).Where(s => !string.IsNullOrEmpty(s)).ToList();
                var result = new List<CondoCreationInfo>();
                int num = 1;
                foreach (string line in lines)
                {
                    var info = this.parse(line, num++);
                    if (info != null)
                    {
                        result.Add(info);
                    }
                }

                log("Parsing is finished. Number of parsed condoss: {0} (total number of rows: {1})", result.Count, num);
                return result;
            }
            catch (Exception x)
            {
                log("Error occured during parsing file '{0}':\n{1}\n{2}",
                    fileName, x.Message, x.StackTrace);
                return new List<CondoCreationInfo>();
            }
        }

        private CondoCreationInfo parse(string line, int num)
        {
            try
            {
                if (string.IsNullOrEmpty(line))
                {
                    log("Can't parse line {0} because it is empty", num);
                    return null;
                }

                string[] vals = line.Split(new[]{";"}, StringSplitOptions.None);
                if (vals.Length != 4)
                {
                    log("Can't parse line {0} ({1}): it doesn't contain 4 columns", num, line);
                    return null;
                }

                var info = new CondoCreationInfo {Name = vals[0], ShortName = vals[1], Url = vals[2], BusinessId = vals[3]};
                return info;
            }
            catch (Exception x)
            {
                log("Error occured during parsing line {0} ('{1}'):\n{2}\n{3}",
                    num, line, x.Message, x.StackTrace);
                return null;
            }
        }

        private void log(string msg, params object[] args)
        {
            try
            {
                if (args.Length > 0)
                {
                    msg = string.Format(msg, args);
                }
                msg = string.Format("{0} (thread id: {1})\t{2}\n", DateTime.Now.ToString("yyyy.MM.dd HH:mm:ss"), Thread.CurrentThread.ManagedThreadId, msg);
                Console.WriteLine(msg);
                File.AppendAllText("log_condoCreator.txt", msg);
            }
            catch
            {
            }
        }
    }
}