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_B.DB;

namespace Diplom_B
{
	public partial class PostForm : Form
	{
		public int? returnId = null;
		private bool needReturn = false;
		private int? dogovorId = null;
		private int? izdelieId = null;
		private void ClearBoxes()
		{
			idLabel.Text = "";
			zavNumBox.Text = "";
			izdelieId = null;
			izdNumLabel.Text = "";
			dogovorId = null;
			dogNumLabel.Text = "";
			datePicker.Value = DateTime.Now;
			statusBox.Items.Clear();
			statusBox.Items.AddRange(WorkDB.GetStatusList());
			statusBox.SelectedIndex = 0;
			primechanieBox.Text = "";
		}
		private void UpdateTable(Postavka[] arr, bool reset_cursor = false)
		{
			var selected = (!reset_cursor && postGridView.SelectedRows.Count > 0) ? postGridView.SelectedRows[0].Index : -1;
			{
				var r = postGridView.Rows;
				while (r.Count > 0)
					r.Remove(r[0]);
				var c = postGridView.Columns;
				while (c.Count > 0)
					c.Remove(c[0]);
			}
			{
				var c = postGridView.Columns;
				c.Add("Id", "№");
				c["Id"].Width = 40;
				c.Add("ZavNum", "Зав №");
				c["ZavNum"].Width = 80;
				c.Add("IzdNum", "Изд. №");
				c["IzdNum"].Width = 80;
				c.Add("DogNum", "Дог. №");
				c["DogNum"].Width = 80;
				c.Add("DataPostavki", "Дата пост.");
				c["DataPostavki"].Width = 100;
				c.Add("Status", "Статус");
				c["Status"].Width = 80;
				c.Add("Primechanie", "Примечание");
				c["Primechanie"].Width = 120;
				c["Primechanie"].DefaultCellStyle.WrapMode = DataGridViewTriState.True;
			}
			{
				var r = postGridView.Rows;
				foreach (var post in arr)
					r.Add(new object[] {
						post.Id,
						post.ZavNum,
						post.IzdelieId.HasValue ? WorkDB.GetIzdelie(post.IzdelieId.Value).DecNum : "",
						post.DogovorId.HasValue ? WorkDB.GetDogovor(post.DogovorId.Value).DogNum : "",
						post.DataPostavki.ToString("yyyy.MM.dd"),
						WorkDB.GetStatus(post.StatusId).Stat,
						post.Primechanie
					});
			}
			if (postGridView.Rows.Count > 0)
				postGridView.Rows[0].Selected = true;
			if (selected != -1 && selected < postGridView.Rows.Count)
				for (var i = 0; i < postGridView.Rows.Count; i++)
					postGridView.Rows[i].Selected = (i == selected);
			postGridView_CurrentCellChanged(this, new EventArgs());
		}

		private Task errDrop;
		private void ShowError(string msg = null)
		{
			errorLabel.Text = string.IsNullOrEmpty(msg) ? "Неизвестная ошибка." : msg;
			errorLabel.Visible = true;
			errDrop = new Task(() =>
			{
				var fd = errDrop.Id;
				Task.Delay(5000).Wait();
				if (errDrop.Id == fd)
					if (InvokeRequired) Invoke((Action)(() => { errorLabel.Visible = false; }));
					else errorLabel.Visible = false;
			});
			errDrop.Start();
		}

		private Task filterDrop;
		private void searchBox_TextChanged(object sender, EventArgs e)
		{
			filterDrop = new Task(() =>
			{
				var fd = filterDrop.Id;
				Task.Delay(1000).Wait();
				if (filterDrop.Id == fd)
					if (InvokeRequired) Invoke((Action)(() => { UpdateTable(WorkDB.ListPostavka(searchBox.Text)); }));
					else UpdateTable(WorkDB.ListPostavka(searchBox.Text));
			});
			filterDrop.Start();
		}

		public PostForm(bool needReturn = false)
		{
			InitializeComponent();
			try
			{
				this.needReturn = needReturn;
				UpdateTable(WorkDB.ListPostavka(searchBox.Text));
				Init();
			}
			catch { ShowError(); }
		}
		private void Init()
		{
			if (Program.user == null) this.Close();
			if (this.needReturn)
			{
				selectButton.Visible = true;
				mainMenuStrip.Visible = false;
			}
			else
			{
				mainMenuStrip.Items[0].Enabled = Program.user.Usr.Dog > 0;
				mainMenuStrip.Items[1].Enabled = Program.user.Usr.Doc > 0;
				mainMenuStrip.Items[2].Enabled = Program.user.Usr.Izv > 0;
				mainMenuStrip.Items[3].Enabled = Program.user.Usr.Post > 0;
				mainMenuStrip.Items[4].Enabled = Program.user.Usr.Izd > 0;
				mainMenuStrip.Items[5].Enabled = Program.user.Usr.Zak > 0;
				mainMenuStrip.Items[6].Enabled = Program.user.Usr.Set > 0;
				mainMenuStrip.Items[3].Enabled = false;
			}
			{
				deleteButton.Enabled = Program.user.Usr.Post > 2;
				createButton.Enabled = Program.user.Usr.Post > 2;
				changeButton.Enabled = Program.user.Usr.Post > 1;
				selectIzdButton.Enabled = Program.user.Usr.Post > 1;
				selectDogButton.Enabled = Program.user.Usr.Post > 1;
			}
		}

		private void postGridView_CurrentCellChanged(object sender, EventArgs e)
		{
			ClearBoxes();
			if (postGridView.SelectedRows.Count != 1)
				return;
			{
				var post = WorkDB.GetPostavka((int)postGridView.SelectedRows[0].Cells[0].Value);
				if (post == null)
					return;
				idLabel.Text = post.Id.ToString();
				zavNumBox.Text = post.ZavNum;
				if(post.IzdelieId.HasValue)
        {
					izdNumLabel.Text = WorkDB.GetIzdelie(post.IzdelieId.Value).DecNum;
					izdelieId = post.IzdelieId;
        }
				if (post.DogovorId.HasValue)
        {
					dogNumLabel.Text = WorkDB.GetDogovor(post.DogovorId.Value).DogNum;
					dogovorId = post.DogovorId;
        }
				datePicker.Value = post.DataPostavki;
				statusBox.SelectedIndex = statusBox.Items.IndexOf(WorkDB.GetStatus(post.StatusId).Stat);
				primechanieBox.Text = post.Primechanie;
			}
		}
		private void createButton_Click(object sender, EventArgs e)
		{
			if (WorkDB.GetPostavkiZavNum().Contains(zavNumBox.Text)) { ShowError("Зав № не уникален."); return; }
			if (statusBox.SelectedIndex < 0) { ShowError("Не выбран статус."); return; }
			try
			{
				var r = new Postavka()
				{
					ZavNum = zavNumBox.Text,
					IzdelieId = izdelieId,
					DogovorId = dogovorId,
					DataPostavki = datePicker.Value,
					StatusId = WorkDB.GetIdStatus((string)statusBox.SelectedItem).Value,
					Primechanie = primechanieBox.Text
				};
				WorkDB.AddPostavka(r);
				UpdateTable(WorkDB.ListPostavka(searchBox.Text));
			}
			catch { ShowError(); }
		}
		private void clearButton_Click(object sender, EventArgs e)
		{
			ClearBoxes();
		}
		private void resetSearchButton_Click(object sender, EventArgs e)
		{
			searchBox.Text = "";
			filterDrop = new Task(() => { return; });
			UpdateTable(WorkDB.ListPostavka(searchBox.Text));
		}
		private void changeButton_Click(object sender, EventArgs e)
		{
			if (!int.TryParse(idLabel.Text, out int idRes)) { ShowError("Поставка не выбрана."); return; }
			var post = WorkDB.GetPostavka(idRes);
			if (post == null) { ShowError("Нет поставки в БД."); return; }
			if (post.ZavNum != zavNumBox.Text && WorkDB.GetPostavkiZavNum().Contains(zavNumBox.Text)) { ShowError("Зав № не уникален."); return; }
			if (statusBox.SelectedIndex < 0) { ShowError("Не выбран статус."); return; }
			try
			{
				post.ZavNum = zavNumBox.Text;
				post.IzdelieId = izdelieId;
				post.DogovorId = dogovorId;
				post.DataPostavki = datePicker.Value;
				post.StatusId = WorkDB.GetIdStatus((string)statusBox.SelectedItem).Value;
				post.Primechanie = primechanieBox.Text;
				WorkDB.ChangePostavka(post);
			}
			catch { ShowError(); }
			UpdateTable(WorkDB.ListPostavka(searchBox.Text));
		}
		private void deleteButton_Click(object sender, EventArgs e)
		{
			if (!int.TryParse(idLabel.Text, out int idRes)) { ShowError("Поставка не выбрана."); return; }
			var post = WorkDB.GetPostavka(idRes);
			if (post == null) { ShowError("Поставки не существует."); return; }
			try
			{
				WorkDB.DeletePostavka(post);
			}
			catch { ShowError(); }
			UpdateTable(WorkDB.ListPostavka(searchBox.Text));
		}
		private void selectButton_Click(object sender, EventArgs e)
		{
			if (int.TryParse(idLabel.Text, out int idRes))
				returnId = idRes;
			this.Close();
		}

		private void MenuItem_Click(object sender, EventArgs e)
		{
			object form = null;
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[0]) { form = new DogForm(); }
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[1]) { form = new DocForm(); }
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[2]) { form = new IzvForm(); }
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[3]) { form = new PostForm(); }
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[4]) { form = new IzdForm(); }
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[5]) { form = new ZakForm(); }
			if ((ToolStripMenuItem)sender == mainMenuStrip.Items[6]) { form = new SetForm(); }
			if (form != null)
			{
				this.Hide();
				((Form)form).Closed += (s, args) => this.Close();
				((Form)form).Show();
			}
		}

    private void selectIzdButton_Click(object sender, EventArgs e)
    {
			var form = new IzdForm(true);
			form.ShowDialog();
			izdelieId = form.returnId;
			if (izdelieId.HasValue)
				izdNumLabel.Text = WorkDB.GetIzdelie(izdelieId.Value).DecNum;
			else
				izdNumLabel.Text = "";
    }
    private void selectDogButton_Click(object sender, EventArgs e)
    {
			var form = new DogForm(true);
			form.ShowDialog();
			dogovorId = form.returnId;
			if (dogovorId.HasValue)
				dogNumLabel.Text = WorkDB.GetDogovor(dogovorId.Value).DogNum;
			else
				dogNumLabel.Text = "";
		}
	}
}