using Npgsql;
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 System.Windows.Forms.VisualStyles;

namespace DeviceAdmin
{
    public partial class FormKits : Form
    {
        NpgsqlConnection connection = Program.connection;
        private DataTable dataTable;
        private NpgsqlDataAdapter adapter;
        private NpgsqlDataAdapter adapter2;
        private NpgsqlDataAdapter adapter3;
        private DataTable dataTableKit = new();
        private DataTable dataTableCabinet = new();
        public FormKits()
        {
            InitializeComponent();
            LoadGridView();
            adapter3 = new NpgsqlDataAdapter("SELECT id, CONCAT(building, ' ', room) AS cabinet FROM cabinets;", connection);
            adapter3.Fill(dataTableCabinet);
            comboBoxCabinet.DataSource = dataTableCabinet;
        }

        private void LoadGridView()
        {
            adapter = new NpgsqlDataAdapter("SELECT kits.id, kits.title, cabinets.room, cabinets.building FROM kits LEFT JOIN cabinets ON kits.cabinet_id=cabinets.id;", connection);
            dataTable = new DataTable();
            adapter.Fill(dataTable);
            dataGridView.DataSource = dataTable;
            DataGridViewColumnCollection columns = dataGridView.Columns;
            columns[0].HeaderText = "ID";
            columns[1].HeaderText = "Название";
            columns[2].HeaderText = "Кабинет";
            columns[3].HeaderText = "Корпус";
        }
        private void ButtonAdd_Click(object sender, EventArgs e)
        {
            if ((comboBoxCabinet.SelectedValue) == null)
            {
                NpgsqlCommand command = new NpgsqlCommand("INSERT INTO kits VALUES (nextval('seq_kits'), @title, default);", connection);
                command.Parameters.AddWithValue("@title", textBoxKit.Text);
                command.ExecuteNonQuery();
            } else
            {
                NpgsqlCommand command = new NpgsqlCommand("INSERT INTO kits VALUES (nextval('seq_kits'), @title, @cabinet_id);", connection);
                command.Parameters.AddWithValue("@title", textBoxKit.Text);
                command.Parameters.AddWithValue("@cabinet_id", (int)comboBoxCabinet.SelectedValue);
                command.ExecuteNonQuery();
            }
            LoadGridView();
        }

        private void ButtonEdit_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                if ((comboBoxCabinet.SelectedValue) == null)
                {
                    int id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                    NpgsqlCommand command = new NpgsqlCommand("UPDATE kits SET title = @title, cabinet_id = default WHERE Id =@Id;", connection);
                    command.Parameters.AddWithValue("@Id", id);
                    command.Parameters.AddWithValue("@title", textBoxKit.Text);
                    command.ExecuteNonQuery();
                }
                else
                {
                    int id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                    NpgsqlCommand command = new NpgsqlCommand("UPDATE kits SET title = @title, cabinet_id = @cabinet_id WHERE Id =@Id;", connection);
                    command.Parameters.AddWithValue("@Id", id);
                    command.Parameters.AddWithValue("@title", textBoxKit.Text);
                    command.Parameters.AddWithValue("@cabinet_id", (int)comboBoxCabinet.SelectedValue);
                    command.ExecuteNonQuery();
                }
                LoadGridView();
            }
            else
            {
                MessageBox.Show("Please select a row to edit.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void ButtonDelete_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                int id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                NpgsqlCommand command = new NpgsqlCommand("DELETE FROM kits WHERE Id = @Id", connection);
                command.Parameters.AddWithValue("@Id", id);
                command.ExecuteNonQuery();
                LoadGridView();
            }
            else
            {
                MessageBox.Show("Please select a row to delete.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void ButtonRefresh_Click(object sender, EventArgs e)
        {
            LoadGridView();
        }
    }
}