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

namespace demMalyhin
{
    public partial class AdmEditProduct : Form
    {
        private string productId;

        private byte[] imageData = null;

        public AdmEditProduct(string productId)
        {
            InitializeComponent();
            LoadSuppliers();
            LoadCategories();
            LoadManufacturers();
            LoadProductData(productId);
            
        }

        private void LoadProductData(string productId)
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT product_name, category_id, supplier_id, manufacturer_id, price, quantity_in_stock, description, unit_type, sale_percent, photo FROM products WHERE article_product = @id";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        command.Parameters.AddWithValue("@id", productId);
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            if (reader.Read())
                            {
                                textBoxArticle.Text = productId;
                                textBoxName.Text = reader["product_name"].ToString();
                                comboBoxCategory.Text = reader["category_id"].ToString();
                                comboBoxSupplier.Text = reader["supplier_id"].ToString();
                                comboBoxManufacturer.Text = reader["manufacturer_id"].ToString();
                                textBoxPrice.Text = reader["price"].ToString();
                                textBoxQuantity.Text = reader["quantity_in_stock"].ToString();
                                textBoxDesc.Text = reader["description"].ToString();
                                textBoxUnit.Text = reader["unit_type"].ToString();
                                textBoxSale.Text = reader["sale_percent"].ToString();
                            }
                            else
                            {
                                MessageBox.Show("Продукт с указанным ID не найден.");
                                this.DialogResult = DialogResult.Cancel;
                                this.Close();
                            }
                            if (reader["photo"] != DBNull.Value)
                            {
                                // Загружаем данные изображения из базы данных в класс-уровневую переменную imageData
                                this.imageData = (byte[])reader["photo"];
                                using (MemoryStream ms = new MemoryStream(this.imageData))
                                {
                                    pictureBoxEditProduct.Image = Image.FromStream(ms);
                                    pictureBoxEditProduct.SizeMode = PictureBoxSizeMode.Zoom;
                                }
                            }
                            else
                            {
                                this.imageData = null; // Убеждаемся, что imageData обнуляется, если фото нет
                                pictureBoxEditProduct.Image = null; // Или устанавливаем стандартную заглушку
                                                                    // pictureBoxEditProduct.Image = Properties.Resources.picture;
                            }
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке данных продукта: " + ex.Message);
            }
        }

        private void btnEditChooseImage_Click(object sender, EventArgs e)
        {
            openFileDialogImage.Filter = "Image Files (*.png;*.jpg;*.jpeg)|*.png;*.jpg;*.jpeg";
            openFileDialogImage.Title = "Выберите новое изображение товара";

            if (openFileDialogImage.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    string filePath = openFileDialogImage.FileName;
                    pictureBoxEditProduct.Image = Image.FromFile(filePath);
                    pictureBoxEditProduct.SizeMode = PictureBoxSizeMode.Zoom;

                    using (var ms = new MemoryStream())
                    {
                        using (Image originalImage = Image.FromFile(filePath))
                        {
                            originalImage.Save(ms, originalImage.RawFormat);
                            imageData = ms.ToArray();
                        }
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Ошибка при загрузке изображения: " + ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    pictureBoxEditProduct.Image = null;
                    imageData = null;
                }
            }
        }

        private void btnEditRemoveImage_Click(object sender, EventArgs e)
        {
            pictureBoxEditProduct.Image = null;
            imageData = null;
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            try
            {
               
                object supplierId = comboBoxSupplier.SelectedValue;
                object manufacturerId = comboBoxManufacturer.SelectedValue;
                object categoryId = comboBoxCategory.SelectedValue;

                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "UPDATE products SET product_name = @pr_name, category_id = @category_id, manufacturer_id = @manufacturer_id, unit_type = @unit, quantity_in_stock = @quantity, price = @price, supplier_id = @supplier_id, description = @desc, photo = @product_photo, sale_percent = @sale WHERE article_product = @id";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        command.Parameters.AddWithValue("@id", textBoxArticle.Text);
                        command.Parameters.AddWithValue("@pr_name", textBoxName.Text);
                        command.Parameters.AddWithValue("@desc", textBoxDesc.Text);
                        command.Parameters.AddWithValue("@sale", textBoxSale.Text);
                        command.Parameters.AddWithValue("@unit", textBoxUnit.Text);
                        command.Parameters.AddWithValue("@quantity", textBoxQuantity.Text);
                        command.Parameters.AddWithValue("@price", Convert.ToDecimal(textBoxPrice.Text));
                        command.Parameters.AddWithValue("@supplier_id", supplierId);
                        command.Parameters.AddWithValue("@manufacturer_id", manufacturerId);
                        command.Parameters.AddWithValue("@category_id", categoryId);

                        if (imageData != null)
                        {
                            // Если изображение было выбрано или изменено
                            command.Parameters.Add(new MySqlParameter("@product_photo", MySqlDbType.MediumBlob) { Value = imageData });
                        }
                        else
                        {
                            // Если изображение удалено или не было выбрано
                            command.Parameters.Add(new MySqlParameter("@product_photo", MySqlDbType.MediumBlob) { Value = imageData });
                        }

                        int rowsAffected = command.ExecuteNonQuery();
                        if (rowsAffected > 0)
                        {
                            MessageBox.Show("Данные продукта успешно обновлены.");
                            this.DialogResult = DialogResult.OK;
                            this.Close();
                        }
                        else
                        {
                            MessageBox.Show("Не удалось обновить данные продукта.");
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при сохранении данных продукта: " + ex.Message);
            }
        }

        private void LoadCategories()
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT id_Category, Category_name FROM Category";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            DataTable categoryTable = new DataTable();
                            categoryTable.Load(reader);

                            comboBoxCategory.DataSource = categoryTable;
                            comboBoxCategory.DisplayMember = "Category_name";
                            comboBoxCategory.ValueMember = "id_Category";
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке категорий: " + ex.Message);
            }
        }

        private void LoadSuppliers()
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT id_Supplier, supplier_name FROM Supplier";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            DataTable suppTable = new DataTable();
                            suppTable.Load(reader);

                            comboBoxSupplier.DataSource = suppTable;
                            comboBoxSupplier.DisplayMember = "supplier_name";
                            comboBoxSupplier.ValueMember = "id_Supplier";
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке категорий: " + ex.Message);
            }
        }

        private void LoadManufacturers()
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT id_Manufacturer, Manufacturer_name FROM Manufacturer";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            DataTable manuTable = new DataTable();
                            manuTable.Load(reader);

                            comboBoxManufacturer.DataSource = manuTable;
                            comboBoxManufacturer.DisplayMember = "Manufacturer_name";
                            comboBoxManufacturer.ValueMember = "id_Manufacturer";
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке категорий: " + ex.Message);
            }
        }

        private void AdmEditProduct_Load(object sender, EventArgs e)
        {

        }

        private void btnBack_Click(object sender, EventArgs e)
        {
            this.Close();
            AdmMainForm amf = new AdmMainForm();
            amf.Show();
        }
    }

    
}