using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Diplom_O.DataBase;

namespace Diplom_O
{
	public partial class StajForm : Form
	{
		private readonly ColumnConf[] tableStajColumns = {
			new ColumnConf(name: "№"),
			new ColumnConf(name: "Названиe", size: 140, warp: true),
			new ColumnConf(name: "Лет", size: 60),
			new ColumnConf(name: "Месяцев", size: 60),
			new ColumnConf(name: "Дней", size: 60)
		};

		private Rabotnik rabotnik = null;
		private void linkRabLabel_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
		{
			var form = new RabForm(true);
			form.ShowDialog();
			if (form.isCanceled)
				rabotnik = null;
			else
				rabotnik = form.formResult;
			ResetLinkRabotnik();
			resetStajTable();
		}
		private void ResetLinkRabotnik()
    {
			if (rabotnik == null)
			{
				linkRabLabel.Text = "Выбрать сотрудника...";
				return;
			}
			var chel = FuncDB.ChelGetById(rabotnik.ChelId);
			if (chel == null)
			{
				linkRabLabel.Text = "Выбрать сотрудника...";
				return;
			}
			var res = chel.FName.ToString() + " " +
							chel.SName[0].ToString() + "." +
								((!string.IsNullOrEmpty(chel.TName)) ?
									chel.TName[0].ToString() + "." : "");
			linkRabLabel.Text = res;
		}
		private void resetStajTable()
    {
			(int year, int month, int day) Sum(
				(int year, int month, int day) t1,
				(int year, int month, int day) t2
				)
      {
				var year = t1.year + t2.year;
				var month = t1.month + t2.month;
				var day = t1.day + t2.day;

				month += day / 30;
				day %= 30;
				year += month / 12;
				month %= 12;

				return (year, month, day);
      }
			(int year, int month, int day) Sub(
				(int year, int month, int day) t1,
				(int year, int month, int day) t2
				)
			{
				var year = t1.year - t2.year;
				var month = t1.month - t2.month;
				var day = t1.day - t2.day;
				while (day < 0)
        {
					day += 30;
					month--;
        }
				while (month < 0)
				{
					month += 12;
					year--;
				}
				month += day / 30;
				day %= 30;
				year += month / 12;
				month %= 12;
				return (year, month, day);
			}

			try
			{
				var res = new List<string[]>();
				if (rabotnik == null)
				{
					this.ResetTable(
						stajGridView,
						tableStajColumns,
						res.ToArray()
					);
					return;
				}

				var count = new Dictionary<int, (int year, int month, int day)>();
				var listRab = FuncDB.RabotnikHistoryByChelId(rabotnik.ChelId);
        foreach (var rab in listRab)
        {
					var size = FuncDB.RabotnikGetTotalTime(rab, dateTimePicker1.Value);
					var staj = FuncDB.RabotnikTypeStajList(rab.Id);
					if (count.ContainsKey(-1))
						count[-1] = Sum(count[-1], size);
					else
						count[-1] = size;
					foreach(var st in staj)
						if (count.ContainsKey(st.TypeStajId))
							count[st.TypeStajId] = Sum(count[st.TypeStajId], size);
						else
							count[st.TypeStajId] = size;
				}

				var listCorrStaj = FuncDB.CorrStajList(rabotnik.ChelId);
				foreach (var corr in listCorrStaj)
				{
					var ts = FuncDB.TypeStajGetById(corr.TypeStajId);
					if (ts != null && ts.Name.CompareTo("Общий") == 0)
						corr.TypeStajId = -1;
					var size = (corr.Year, corr.Month, corr.Day);
					if (!count.ContainsKey(corr.TypeStajId))
						count[corr.TypeStajId] = (0, 0, 0);
					if (corr.AddFlag)
						count[corr.TypeStajId] = Sum(count[corr.TypeStajId], size);
					else
						count[corr.TypeStajId] = Sub(count[corr.TypeStajId], size);
				}

				foreach (var r in count)
        {
					if (r.Value.year < 0 || r.Value.year + r.Value.month + r.Value.day == 0)
						continue;
					var sr = new List<string>();
					sr.Add(r.Key.ToString());
					if (r.Key == -1)
						sr.Add("Общий");
					else
						sr.Add(FuncDB.TypeStajGetById(r.Key).Name);
					sr.Add(r.Value.year.ToString());
					sr.Add(r.Value.month.ToString());
					sr.Add(r.Value.day.ToString());
					res.Add(sr.ToArray());
				}

				this.ResetTable(
					stajGridView,
					tableStajColumns,
					res.ToArray()
					);

			}
			catch (Exception e)
			{
				this.ShowError(errorLabel, e.Message);
			}
		}

		public StajForm()
		{
			InitializeComponent();
			this.correctUpperMenu(menuStrip, 3);
			dateTimePicker1.Value = DateTime.Now;
			ResetLinkRabotnik(); 
			resetTypeStajComboBox();

			linkRabLabel.Enabled = false;
			addStajButton.Enabled = false;
			var user = this.GetUser();
			if (user == null)
				return;
			linkRabLabel.Enabled =
				FuncDB.AccessGetByUserIdFormIdAccessId(user.Id, 3, 0) != null;
			addStajButton.Enabled =
				FuncDB.AccessGetByUserIdFormIdAccessId(user.Id, 3, 2) != null ||
				FuncDB.AccessGetByUserIdFormIdAccessId(user.Id, 3, 3) != null;

		}

		private void resetTypeStajComboBox()
		{
			try
			{
				var list = new List<string>();
				list.Add("Общий");
				list.AddRange(FuncDB.TypeStajListString());
				comboBox1.Items.Clear();
				comboBox1.Items.AddRange(list.ToArray());
				comboBox1.SelectedIndex = -1;
			}
			catch (Exception e)
			{
				this.ShowError(errorLabel, e.Message);
			}
		}

		private void upperMenuClicked(object sender, ToolStripItemClickedEventArgs e)
		{
			this.upperMenuClicked((MenuStrip)sender);
			if (this.GetNextForm() != -1)
				Close();
		}

    private void typeStajChanged(object sender, EventArgs e)
    {
			try
			{
				addRadioButton.Checked = ! (delRadioButton.Checked = false);
				yearTB.Text = monthTB.Text = dayTB.Text = "";
				if (rabotnik == null)
					return;
				var staj = FuncDB.TypeStajGetByName(comboBox1.Text);
				if (staj == null)
					return;
				var corrStaj = FuncDB.CorrStaj(rabotnik.ChelId, staj.Name);
				if (corrStaj == null)
					return;
				yearTB.Text = corrStaj.Year.ToString();
				monthTB.Text = corrStaj.Month.ToString();
				dayTB.Text = corrStaj.Day.ToString();
				delRadioButton.Checked = !(addRadioButton.Checked = corrStaj.AddFlag);
			}
			catch (Exception ex)
			{
				this.ShowError(errorLabel, ex.Message);
			}
		}
    private void addStajButton_Click(object sender, EventArgs e)
    {
			try
			{
				if (rabotnik == null)
					throw new Exception("Не выбран сотрудник.");
				if (!int.TryParse(yearTB.Text, out int year) || year < 0)
					throw new Exception("Не верно указан год.");
				if (!int.TryParse(monthTB.Text, out int month) || month < 0)
					throw new Exception("Не верно указан месяц.");
				if (!int.TryParse(dayTB.Text, out int day) || day < 0)
					throw new Exception("Не верно указан день.");

				var typeStaj = FuncDB.TypeStajGetByName(comboBox1.Text);
				if(typeStaj == null)
        {
					FuncDB.TypeStajAdd(new TypeStaj() { Name = comboBox1.Text });
					typeStaj = FuncDB.TypeStajGetByName(comboBox1.Text);
				}

				var corrStaj = FuncDB.CorrStaj(rabotnik.ChelId, typeStaj.Name);
				if (corrStaj == null)
				{
					FuncDB.CorrStajAdd(new CorrStaj()
					{
						Year = year,
						Month = month,
						Day = day,
						ChelId = rabotnik.ChelId,
						TypeStajId = typeStaj.Id,
						AddFlag = addRadioButton.Checked
					});
				}
				else
        {
					corrStaj.ChelId = rabotnik.ChelId;
					corrStaj.TypeStajId = typeStaj.Id;
					corrStaj.AddFlag = addRadioButton.Checked;
					corrStaj.Year = year;
					corrStaj.Month = month;
					corrStaj.Day = day;
					FuncDB.CorrStajChange(corrStaj);
        }
				resetStajTable();
				resetTypeStajComboBox();
			}
			catch (Exception ex)
			{
				this.ShowError(errorLabel, ex.Message);
			}
		}

    private void button1_Click(object sender, EventArgs e)
    {
			resetStajTable();
    }
  }
}