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 SetForm : Form
	{
		public SetForm()
		{
			InitializeComponent();
			Init();
			defaultBox.Items.Clear();
			defaultBox.Items.AddRange(Program.user.FormsName);
			UpdateTable(WorkDB.ListUser(searchBox.Text));
		}

		private void Init()
		{
			if (Program.user == null) this.Close();
			{ 
				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[6].Enabled = false;
			}
			{
				deleteButton.Enabled = Program.user.Usr.Set > 2;
				createButton.Enabled = Program.user.Usr.Set > 2;
				changeButton.Enabled = Program.user.Usr.Set > 1;
			}
		}

		private void ClearBoxes()
		{
			idLable.Text = "";
			nameBox.Text = "";
			passBox.Text = "";
			defaultBox.SelectedIndex = 0;
			chkDog1.Checked = chkDog2.Checked = chkDog3.Checked = false;
			chkDoc1.Checked = chkDoc2.Checked = chkDoc3.Checked = false;
			chkIzv1.Checked = chkIzv2.Checked = chkIzv3.Checked = false;
			chkPost1.Checked = chkPost2.Checked = chkPost3.Checked = false;
			chkIzd1.Checked = chkIzd2.Checked = chkIzd3.Checked = false;
			chkZak1.Checked = chkZak2.Checked = chkZak3.Checked = false;
			chkSet1.Checked = chkSet2.Checked = chkSet3.Checked = false;
		}

		private void clearButton_Click(object sender, EventArgs e)
		{
			ClearBoxes();
		}

		private void UpdateTable(DB.User[] arr, bool reset_cursor = false)
		{
			var selected = (!reset_cursor && usrGridView.SelectedRows.Count > 0) ? usrGridView.SelectedRows[0].Index : -1;
			{
				var r = usrGridView.Rows;
				while (r.Count > 0)
					r.Remove(r[0]);
				var c = usrGridView.Columns;
				while (c.Count > 0)
					c.Remove(c[0]);
			}
			{
				var c = usrGridView.Columns;
				c.Add("Id", "№");
				c["Id"].Width = 40;
				c.Add("Name", "Наим.");
				c["Name"].Width = 60;
				c.Add("DefaultForm", "Окно");
				c["DefaultForm"].Width = 100;
			}
			{
				var r = usrGridView.Rows;
				foreach (var usr in arr)
					r.Add(new object[] {
						usr.Id,
						usr.Name,
						Program.user.FormsName[usr.Default]
					});
			}
			if (usrGridView.Rows.Count > 0)
				usrGridView.Rows[0].Selected = true;
			if (selected != -1 && selected < usrGridView.Rows.Count)
				for (var i = 0; i < usrGridView.Rows.Count; i++)
					usrGridView.Rows[i].Selected = (i == selected);
			usrGridView_CurrentCellChanged(this, new EventArgs());
		}

		private Task errDrop;
		private void ShowError(string msg = null)
		{
			errorLable.Text = string.IsNullOrEmpty(msg) ? "Неизвестная ошибка." : msg;
			errorLable.Visible = true;
			errDrop = new Task(() =>
			{
				var fd = errDrop.Id;
				Task.Delay(5000).Wait();
				if (errDrop.Id == fd)
					if (InvokeRequired) Invoke((Action)(() => { errorLable.Visible = false; }));
					else errorLable.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.ListUser(searchBox.Text)); }));
					else UpdateTable(WorkDB. ListUser(searchBox.Text));
			});
			filterDrop.Start();
		}
		private void usrGridView_CurrentCellChanged(object sender, EventArgs e)
		{
			ClearBoxes();
			if (usrGridView.SelectedRows.Count != 1)
				return;
			{
				var usr = WorkDB.GetUser((int)usrGridView.SelectedRows[0].Cells[0].Value);
				if (usr == null)
					return;
				idLable.Text = usr.Id.ToString();
				nameBox.Text = usr.Name;
				passBox.Text = usr.Pass;
				defaultBox.SelectedIndex = usr.Default;
				chkDog1.Checked = usr.Dog > 0; chkDog2.Checked = usr.Dog > 1; chkDog3.Checked = usr.Dog > 2;
				chkDoc1.Checked = usr.Doc > 0; chkDoc2.Checked = usr.Doc > 1; chkDoc3.Checked = usr.Doc > 2;
				chkIzv1.Checked = usr.Izv > 0; chkIzv2.Checked = usr.Izv > 1; chkIzv3.Checked = usr.Izv > 2;
				chkPost1.Checked = usr.Post > 0; chkPost2.Checked = usr.Post > 1; chkPost3.Checked = usr.Post > 2;
				chkIzd1.Checked = usr.Izd > 0; chkIzd2.Checked = usr.Izd > 1; chkIzd3.Checked = usr.Izd > 2;
				chkZak1.Checked = usr.Zak > 0; chkZak2.Checked = usr.Zak > 1; chkZak3.Checked = usr.Zak > 2;
				chkSet1.Checked = usr.Set > 0; chkSet2.Checked = usr.Set > 1; chkSet3.Checked = usr.Set > 2;
			}
		}

		private void resetSearchButton_Click(object sender, EventArgs e)
		{
			searchBox.Text = "";
			filterDrop = new Task(() => { return; });
			UpdateTable(WorkDB.ListUser(searchBox.Text));
		}
		private void createButton_Click(object sender, EventArgs e)
		{
			if(WorkDB.GetUserList().Contains(nameBox.Text)) { ShowError("Пользователь существует."); return; }
			if(string.IsNullOrEmpty(passBox.Text)) { ShowError("Пароль пустой."); return; }
			try
			{
				var r = new DB.User()
				{
					Name = nameBox.Text,
					Pass = passBox.Text,
					Dog = (chkDog3.Checked) ? 3 : (chkDog2.Checked) ? 2 : (chkDog1.Checked) ? 1 : 0,
					Doc = (chkDoc3.Checked) ? 3 : (chkDoc2.Checked) ? 2 : (chkDoc1.Checked) ? 1 : 0,
					Izv = (chkIzv3.Checked) ? 3 : (chkIzv2.Checked) ? 2 : (chkIzv1.Checked) ? 1 : 0,
					Post = (chkPost3.Checked) ? 3 : (chkPost2.Checked) ? 2 : (chkPost1.Checked) ? 1 : 0,
					Izd = (chkIzd3.Checked) ? 3 : (chkIzd2.Checked) ? 2 : (chkIzd1.Checked) ? 1 : 0,
					Zak = (chkZak3.Checked) ? 3 : (chkZak2.Checked) ? 2 : (chkZak1.Checked) ? 1 : 0,
					Set = (chkSet3.Checked) ? 3 : (chkSet2.Checked) ? 2 : (chkSet1.Checked) ? 1 : 0,
				};
				var flag = false;
        switch (defaultBox.SelectedIndex)
        {
					case 0: flag = r.Dog > 0; break;
					case 1: flag = r.Doc > 0; break;
					case 2: flag = r.Izv > 0; break;
					case 3: flag = r.Post > 0; break;
					case 4: flag = r.Izd > 0; break;
					case 5: flag = r.Zak > 0; break;
					case 6: flag = r.Set > 0; break;
				}
				if (!flag) { ShowError("Форма недоступна."); return; }
				r.Default = defaultBox.SelectedIndex;
				WorkDB.AddUser(r);
				UpdateTable(WorkDB.ListUser(searchBox.Text));
			}
			catch { ShowError(); }
		}
		private void changeButton_Click(object sender, EventArgs e)
		{
			try
			{
				if (!int.TryParse(idLable.Text, out int idRes)) { ShowError("Польз. не выбран."); return; }
				var usr = WorkDB.GetUser(idRes);
				if (usr == null) { ShowError("Нет польз. в БД."); return; }
				if (string.IsNullOrEmpty(passBox.Text)) { ShowError("Пароль пустой."); return; }
				if (usr.Name != nameBox.Text && WorkDB.GetUserList().Contains(nameBox.Text)) { ShowError("Польз. есть в БД."); return; }
				usr.Name = (usr.Name == "admin") ? "admin" : nameBox.Text;
				usr.Pass = passBox.Text;
				usr.Dog = (chkDog3.Checked || usr.Name == "admin") ? 3 : (chkDog2.Checked) ? 2 : (chkDog1.Checked) ? 1 : 0;
				usr.Doc = (chkDoc3.Checked || usr.Name == "admin") ? 3 : (chkDoc2.Checked) ? 2 : (chkDoc1.Checked) ? 1 : 0;
				usr.Izv = (chkIzv3.Checked || usr.Name == "admin") ? 3 : (chkIzv2.Checked) ? 2 : (chkIzv1.Checked) ? 1 : 0;
				usr.Post = (chkPost3.Checked || usr.Name == "admin") ? 3 : (chkPost2.Checked) ? 2 : (chkPost1.Checked) ? 1 : 0;
				usr.Izd = (chkIzd3.Checked || usr.Name == "admin") ? 3 : (chkIzd2.Checked) ? 2 : (chkIzd1.Checked) ? 1 : 0;
				usr.Zak = (chkZak3.Checked || usr.Name == "admin") ? 3 : (chkZak2.Checked) ? 2 : (chkZak1.Checked) ? 1 : 0;
				usr.Set = (chkSet3.Checked || usr.Name == "admin") ? 3 : (chkSet2.Checked) ? 2 : (chkSet1.Checked) ? 1 : 0;

				var flag = false;
				switch (defaultBox.SelectedIndex)
				{
					case 0: flag = usr.Dog > 0; break;
					case 1: flag = usr.Doc > 0; break;
					case 2: flag = usr.Izv > 0; break;
					case 3: flag = usr.Post > 0; break;
					case 4: flag = usr.Izd > 0; break;
					case 5: flag = usr.Zak > 0; break;
					case 6: flag = usr.Set > 0; break;
				}
				if (!flag) { ShowError("Форма недоступна."); return; }
				usr.Default = defaultBox.SelectedIndex;
				WorkDB.ChangeUser(usr);
				UpdateTable(WorkDB.ListUser(searchBox.Text));
			}
			catch { ShowError(); }
		}
		private void deleteButton_Click(object sender, EventArgs e)
		{
			if (!int.TryParse(idLable.Text, out int idRes)) { ShowError("Польз. не выбран."); return; }
			var usr = WorkDB.GetUser(idRes);
			if (usr == null) { ShowError("Польз. не существует."); return; }
			if (usr.Name == "admin") { ShowError("Нельзя улвить польз."); return; }
			try
			{
				WorkDB.DeleteUser(usr);
			}
			catch { ShowError(); }
			UpdateTable(WorkDB.ListUser(searchBox.Text));
		}

		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 StatusButton_Click(object sender, EventArgs e)
    {
			var form = new StatForm();
			form.ShowDialog();
    }
  }
}