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 MySql.Data.MySqlClient;

namespace WinFormsApp1
{
    public partial class Reduct2 : Form
    {
        public Reduct2(string productId)
        {
            InitializeComponent();
            LoadProductData(productId);
            LoadCategories();
            LoadSuppliers();
            LoadManufacteries();
            LoadUnitType();
        }
        private void LoadCategories()
        {
            DB db = new DB();
            DataTable categories = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand command = new MySqlCommand("SELECT idCategory, CategoryName FROM Category", db.getConnection());

            try
            {
                db.openConnection();
                adapter.SelectCommand = command;
                adapter.Fill(categories);

                comboBoxCategories.DataSource = categories;
                comboBoxCategories.DisplayMember = "CategoryName";
                comboBoxCategories.ValueMember = "idCategory";
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка загрузки категорий " + ex.Message);
            }
            finally
            {
                db.closeConnection();
            }
        }
        private void LoadManufacteries()
        {
            DB db = new DB();
            DataTable manufacturer = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand command = new MySqlCommand("SELECT idManufacturer, ManufacturerName FROM Manufacturer", db.getConnection());

            try
            {
                db.openConnection();
                adapter.SelectCommand = command;
                adapter.Fill(manufacturer);

                comboBoxManufacturer.DataSource = manufacturer;
                comboBoxManufacturer.DisplayMember = "ManufacturerName";
                comboBoxManufacturer.ValueMember = "idManufacturer";
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка загрузки категорий " + ex.Message);
            }
            finally
            {
                db.closeConnection();
            }
        }
        private void LoadUnitType()
        {
            DB db = new DB();
            DataTable UnitType = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand command = new MySqlCommand("SELECT idUnitType, UnitTypeName FROM UnitType", db.getConnection());

            try
            {
                db.openConnection();
                adapter.SelectCommand = command;
                adapter.Fill(UnitType);

                comboBoxUnitType.DataSource = UnitType;
                comboBoxUnitType.DisplayMember = "UnitTypeName";
                comboBoxUnitType.ValueMember = "idUnitType";
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка загрузки категорий " + ex.Message);
            }
            finally
            {
                db.closeConnection();
            }
        }
        private void LoadSuppliers()
        {
            DB db = new DB();
            DataTable suppliers = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand command = new MySqlCommand("SELECT idSupplier, SupplierName FROM Supplier", db.getConnection());

            try
            {
                db.openConnection();
                adapter.SelectCommand = command;
                adapter.Fill(suppliers);

                comboBoxSupplier.DataSource = suppliers;
                comboBoxSupplier.DisplayMember = "SupplierName";
                comboBoxSupplier.ValueMember = "idSupplier";
            }
            catch (Exception ex)
            {
                MessageBox.Show("Ошибка загрузки категорий " + ex.Message);
            }
            finally
            {
                db.closeConnection();
            }
        }
        private void LoadProductData(string productId)
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT Article, ProductName, Category_id, ProductDescryption, Manufacturer_id, Supplier_id, Price, Discount, QuantityStock, UnitType_id FROM Products WHERE idProducts = @id";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        command.Parameters.AddWithValue("@id", productId);
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            if (reader.Read())
                            {
                                textBoxArticle.Text = reader["Article"].ToString();
                                textBoxID.Text = productId;
                                textBoxProdName.Text = reader["ProductName"].ToString();
                                comboBoxCategories.Text = reader["Category_id"].ToString();
                                textBoxDesc.Text = reader["ProductDescryption"].ToString();
                                comboBoxManufacturer.Text = reader["Manufacturer_id"].ToString();
                                comboBoxSupplier.Text = reader["Supplier_id"].ToString();
                                textBoxPrice.Text = reader["Price"].ToString();
                                textBoxSale.Text = reader["Discount"].ToString();
                                textBoxStockQuan.Text = reader["QuantityStock"].ToString();
                                comboBoxUnitType.Text = reader["UnitType_id"].ToString();
                            }
                            else
                            {
                                MessageBox.Show("Продукт с указанным ID не найден.");
                                this.DialogResult = DialogResult.Cancel;
                                this.Close();
                            }
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке данных продукта: " + ex.Message);
            }
        }
        private void btnSave_Click(object sender, EventArgs e)
        {
            try
            {
                object supplierId = comboBoxSupplier.SelectedValue;
                object manufacturerId = comboBoxManufacturer.SelectedValue;
                object categoryId = comboBoxCategories.SelectedValue;
                object unittypeId = comboBoxUnitType.SelectedValue;

                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "UPDATE Products SET Article = @art, ProductName = @pr_name, Category_id = @cat, ProductDescryption = @desc, Manufacturer_id = @manu, Supplier_id = @supp, Price = @base, Discount = @sale, QuantityStock = @stock, UnitType_id = @unit WHERE idProducts = @id";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        command.Parameters.AddWithValue("@art", textBoxArticle.Text);
                        command.Parameters.AddWithValue("@pr_name", textBoxProdName.Text);
                        command.Parameters.AddWithValue("@desc", textBoxDesc.Text);
                        command.Parameters.AddWithValue("@sale", textBoxSale.Text);
                        command.Parameters.AddWithValue("@id", textBoxID.Text);
                        command.Parameters.AddWithValue("@stock", textBoxStockQuan.Text);
                        command.Parameters.AddWithValue("@base", textBoxPrice.Text);
                        command.Parameters.AddWithValue("@supp", supplierId);
                        command.Parameters.AddWithValue("@manu", manufacturerId);
                        command.Parameters.AddWithValue("@cat", categoryId);
                        command.Parameters.AddWithValue("@unit", unittypeId);

                        int rowsAffected = command.ExecuteNonQuery();
                        if (rowsAffected > 0)
                        {
                            MessageBox.Show("Данные продукта успешно обновлены.");
                            this.DialogResult = DialogResult.OK;
                            this.Hide();
                            AdmMainForm main = new AdmMainForm();
                            main.Show();
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при сохранении данных продукта: " + ex.Message);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Hide();
            AdmMainForm mainForm = new AdmMainForm();
            mainForm.Show();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.Hide();
            AdmMainForm af = new AdmMainForm();
            af.Show();
        }
    }
}