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

namespace FiveLetters.Model
{


    public class FileTaskProvider : ITaskProvider
    {
        private List<FiveLettersTask> _tasks;

        public FileTaskProvider()
        {
            _tasks = new List<FiveLettersTask>();
        }

        public FiveLettersTask GetTodayTask()
        {
            var dd = DateTime.Now.Day;
            if (_tasks.Count > dd)
            {
                return _tasks[dd];
            }
            else
            {
                return _tasks[0];
            }
        }

        private void h_LoadTasks()
        {
            _tasks.Clear();
            DateTime dtStartMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day);
            string sFn = dtStartMonth.ToString("yyyyMM") + ".txt";
            if (File.Exists(sFn))
            {
                h_LoadTask(sFn, dtStartMonth);
            }
            else
            {
                for (int ii = 0; ii < 31; ii++)
                {
                    _tasks.Add(new FiveLettersTask(dtStartMonth, "СЛОВО"));
                    dtStartMonth = dtStartMonth.AddDays(1);
                }
            }
        }

        private void h_LoadTask(string sFn, DateTime dtStartMonth)
        {
            string[] lines = File.ReadAllLines(sFn);
            for (int ii = 0; ii < lines.Length; ii++)
            {
                _tasks.Add(new FiveLettersTask(dtStartMonth, lines[ii]));
                dtStartMonth = dtStartMonth.AddDays(1);
            }
        }

        public FiveLettersTask GetTask(string taskGuid)
        {
            return _tasks.FirstOrDefault(p => p.TaskGuid.Equals(taskGuid));
        }
    }

}