using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;

namespace fsh
{
    public partial class EditBooksForm : Form
    {
        private int bookId;
        string connStr = "Server=cfif31.ru;Port=3306;Database=ISPr25-21_KorotinDV_37;Uid=ISPr25-21_KorotinDV;Pwd=ISPr25-21_KorotinDV; SslMode=none";

        public EditBooksForm(int id)
        {
            InitializeComponent();
            bookId = id;
            LoadBookData();
            LoadAuthors();
        }
   
        private void LoadAuthors()
        {
            try
            {
                using (MySqlConnection conn = new MySqlConnection(connStr))
                {
                    conn.Open();
                    string sql = "SELECT idavtori, name_A FROM avtori ORDER BY name_A";

                    MySqlCommand cmd = new MySqlCommand(sql, conn);
                    MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                    DataTable dt = new DataTable();
                    da.Fill(dt);

                    comboBox1.DataSource = dt;
                    comboBox1.DisplayMember = "name_A";
                    comboBox1.ValueMember = "idavtori";
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка загрузки авторов: " + ex.Message);
            }
        }

        private void LoadBookData()
        {
            try
            {
                using (MySqlConnection conn = new MySqlConnection(connStr))
                {
                    conn.Open();
                    string sql = "SELECT avtor, name, price FROM books WHERE idname = @id";

                    MySqlCommand cmd = new MySqlCommand(sql, conn);
                    cmd.Parameters.AddWithValue("@id", bookId);

                    MySqlDataReader reader = cmd.ExecuteReader();

                    if (reader.Read())
                    {
                        tbName.Text = reader["name"].ToString();
                        comboBox1.SelectedValue = reader["avtor"]; 
                        tbPrice.Text = reader["price"].ToString();
                    }
                    else
                    {
                        MessageBox.Show("Книга не найдена!");
                        this.Close();
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка загрузки данных книги: " + ex.Message);
            }
        }


        private void button1_Click(object sender, EventArgs e)
        {
            //string connStr = "Server=cfif31.ru;Port=3306;Database=ISPr25-21_KorotinDV_37;Uid=ISPr25-21_KorotinDV;Pwd=ISPr25-21_KorotinDV; SslMode=none";
            //using (MySqlConnection conn = new MySqlConnection(connStr))
            //{
            //    conn.Open();
            //    string sql = "UPDATE books SET name = @name, avtor = @avtor, price = @price WHERE idname = @idname";
            //    MySqlCommand cmd = new MySqlCommand(sql, conn);
            //    cmd.Parameters.AddWithValue("@idname", bookId);
            //    cmd.Parameters.AddWithValue("@name", tbName.Text);
            //    cmd.Parameters.AddWithValue("@avtor", comboBox1.Text);
            //    cmd.Parameters.AddWithValue("@price", decimal.Parse(tbPrice.Text)); 
            //    cmd.ExecuteNonQuery();
            //}
            //this.DialogResult = DialogResult.OK;
            //this.Close();



            try
            {
                using (MySqlConnection conn = new MySqlConnection(connStr))
                {
                    conn.Open();

                    string sql = "UPDATE books SET name = @name, avtor = @avtor, price = @price WHERE idname = @id";
                    MySqlCommand cmd = new MySqlCommand(sql, conn);

                    cmd.Parameters.AddWithValue("@name", tbName.Text.Trim());
                    cmd.Parameters.AddWithValue("@avtor", comboBox1.SelectedValue);
                    cmd.Parameters.AddWithValue("@price", decimal.Parse(tbPrice.Text));
                    cmd.Parameters.AddWithValue("@id", bookId); // Важно: обновляем именно эту книгу

                    int rows = cmd.ExecuteNonQuery();

                    if (rows > 0)
                    {
                        MessageBox.Show("Данные успешно обновлены!", "Успех", MessageBoxButtons.OK, MessageBoxIcon.Information);
                        this.DialogResult = DialogResult.OK;
                        this.Close();
                    }
                    else
                    {
                        MessageBox.Show("Не удалось обновить данные.", "Ошибка");
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка при сохранении: " + ex.Message, "Критическая ошибка");
            }
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }
    }
}