using Npgsql;
using System.Data;
namespace DeviceAdmin
{
    public partial class FormOwnership : Form
    {
        NpgsqlConnection connection = Program.connection;
        private DataTable dataTable;
        private NpgsqlDataAdapter adapter;
        private NpgsqlDataAdapter adapter2;
        private NpgsqlDataAdapter adapter3;
        private DataTable dataTableStaff = new();
        private DataTable dataTableKit = new();
        public FormOwnership()
        {
            InitializeComponent();
            LoadGridView();
            adapter2 = new NpgsqlDataAdapter("SELECT id, CONCAT(id, ' ', title) AS title FROM kits", connection);
            adapter2.Fill(dataTableKit);
            comboBoxKit.DataSource = dataTableKit;
            adapter3 = new NpgsqlDataAdapter("SELECT * FROM staff", connection);
            adapter3.Fill(dataTableStaff);
            comboBoxStaff.DataSource = dataTableStaff;
        }
        private void LoadGridView()
        {
            adapter = new NpgsqlDataAdapter("SELECT kit_id, kits.title, staff_id, staff.full_name FROM ownership LEFT JOIN kits ON kit_id=kits.id FULL OUTER JOIN staff ON staff_id=staff.id;", connection);
            dataTable = new DataTable();
            adapter.Fill(dataTable);
            dataGridView.DataSource = dataTable;
            DataGridViewColumnCollection columns = dataGridView.Columns;
            columns[0].HeaderText = "ID компл.";
            columns[1].HeaderText = "Название компл.";
            columns[2].HeaderText = "ID сотрудника";
            columns[3].HeaderText = "ФИО сотрудника";
        }
        private void ButtonAdd_Click(object sender, EventArgs e)
        {
            NpgsqlCommand command = new NpgsqlCommand("INSERT INTO ownership VALUES (@kit, @staff);", connection);
            command.Parameters.AddWithValue("@kit", (int)comboBoxKit.SelectedValue);
            command.Parameters.AddWithValue("@staff", (int)comboBoxStaff.SelectedValue);
            command.ExecuteNonQuery();
            LoadGridView();
        }
        private void ButtonEdit_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                int kit_id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                int staff_Id = (int)dataGridView.SelectedRows[0].Cells[2].Value; 
                NpgsqlCommand command = new NpgsqlCommand("UPDATE ownership SET kit_id = @kit, staff_id = @staff WHERE kit_id =@kit_id AND staff_id=@staff_id", connection);
                command.Parameters.AddWithValue("@kit_id", kit_id);
                command.Parameters.AddWithValue("@staff_Id", staff_Id);
                command.Parameters.AddWithValue("@kit", (int)comboBoxKit.SelectedValue);
                command.Parameters.AddWithValue("@staff", (int)comboBoxStaff.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 kit_id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                int staff_Id = (int)dataGridView.SelectedRows[0].Cells[2].Value;
                NpgsqlCommand command = new NpgsqlCommand("DELETE FROM ownership WHERE kit_id = @kit_id and staff_id=@staff_id", connection);
                command.Parameters.AddWithValue("@kit_id", kit_id);
                command.Parameters.AddWithValue("@staff_Id", staff_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();
        }
    }
}