using Contracts.BindingModels;
using Contracts.BusinessLogicContracts;
using Contracts.SearchModels;
using Contracts.ViewModels;
using DataModels.Models;
using Microsoft.EntityFrameworkCore.Metadata.Internal;
using Microsoft.Extensions.Logging;
using Microsoft.VisualBasic.Logging;
using System;
using System.Collections;
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;

namespace WinFormsApp
{
    public partial class FormSuppliers : Form
    {
        private Guid? _id;
        private readonly ILogger _logger;
        private readonly ISupplierLogic _supplierLogic;
        private readonly IProductLogic _productLogic;
        private Dictionary<Guid, (IProduct, int)> _supplierProducts;
        private List<ProductViewModel> _productList;
        public FormSuppliers(ILogger<FormMain> logger, ISupplierLogic supplierLogic, IProductLogic productLogic)
        {
            InitializeComponent();
            _supplierLogic = supplierLogic;
            _logger = logger;
            _productLogic = productLogic;
            _supplierProducts = new Dictionary<Guid, (IProduct, int)>();
            _productList = _productLogic.ReadList(null);
            if (_productList != null)
            {
                comboBoxProducts.DisplayMember = "Name";
                comboBoxProducts.ValueMember = "Id";
                comboBoxProducts.DataSource = _productList;
                comboBoxProducts.SelectedItem = null;
            }
        }

        private void FormSuppliers_Load(object sender, EventArgs e)
        {
            LoadData();
            groupBoxCreateSupplier.Hide();
            //groupBoxCreateProduct.Enabled = false;
        }

        private void LoadSupplierData()
        {
            if (_id.HasValue)
            {
                var view = _supplierLogic.ReadElement(new SupplierSearchModel
                {
                    Id = _id.Value
                });
                _supplierProducts = view.AvailibleProducts;
                textBoxName.Text = view.Name;
                numericUpDownDeals.Value = view.Deals;
            }
            dataGridViewProducts.Rows.Clear();
            foreach (var pc in _supplierProducts)
            {
                dataGridViewProducts.Rows.Add(new object[] { pc.Value.Item1.Name, pc.Value.Item2 });
            }
        }

        private void LoadData()
        {
            _logger.LogInformation("Загрузка поставщиков");
            try
            {
                var list = _supplierLogic.ReadList(null);
                if (list != null)
                {
                    dataGridView.DataSource = list;
                }
                _logger.LogInformation("Загрузка поставщиков");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Ошибка загрузки поставщиков");
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void buttonCreateSupplier_Click(object sender, EventArgs e)
        {
            //надо сделать че нибудь с фронтом а то всё грустно
            groupBoxControls.Hide();
            //groupBoxControls.Enabled = false;
            groupBoxCreateSupplier.Show();
            //groupBoxCreateProduct.Enabled = true;
        }

        private void buttonUpdateSupplier_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count <= 0) return;
            _id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
            groupBoxControls.Hide();
            groupBoxCreateSupplier.Show();
            _logger.LogInformation("Получение поставщика");
            var view = _supplierLogic.ReadElement(new SupplierSearchModel
            {
                Id = _id.Value
            });
            LoadSupplierData();
        }

        private void buttonCancel_Click(object sender, EventArgs e)
        {
            _id = null;
            _supplierProducts.Clear();
            groupBoxControls.Show();
            //groupBoxControls.Enabled = false;
            groupBoxCreateSupplier.Hide();
            //groupBoxCreateProduct.Enabled = true;
            textBoxName.Text = string.Empty;
        }

        private void buttonDeleteSupplier_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count == 1)
            {
                if (MessageBox.Show("Удалить запись?", "Вопрос",
               MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    Guid id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
                    _logger.LogInformation("Удаление товара");
                    try
                    {
                        if (!_productLogic.Delete(new ProductBindingModel
                        {
                            Id = id
                        }))
                        {
                            throw new Exception("Ошибка при удалении. Дополнительная информация в логах.");
                        }
                        LoadData();
                    }
                    catch (Exception ex)
                    {
                        _logger.LogError(ex, "Ошибка удаления товара");
                        MessageBox.Show(ex.Message, "Ошибка",
                        MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
        }

        public IProduct? ProductModel
        {
            get
            {
                if (_productList == null)
                {
                    return null;
                }
                foreach (var elem in _productList)
                {
                    if (elem.Id == Id)
                    {
                        return elem;
                    }
                }
                return null;
            }
        }

        public Guid Id
        {
            get
            {
                return (Guid)comboBoxProducts.SelectedValue;
            }
            set
            {
                comboBoxProducts.SelectedValue = value;
            }
        }

        private void buttonAddSupplierProduct_Click(object sender, EventArgs e)
        {
            Debug.WriteLine(comboBoxProducts.SelectedValue);
            if (_supplierProducts.ContainsKey(Id))
            {
                _supplierProducts[Id] = (ProductModel, Convert.ToInt16(numericUpDownCount.Value));
            }
            else
            {
                _supplierProducts.Add(Id, (ProductModel, Convert.ToInt16(numericUpDownCount.Value)));
            }

            LoadSupplierData();
        }

        private void buttonSaveProduct_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBoxName.Text))
            {
                MessageBox.Show("Заполните имя поставщика", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            _logger.LogInformation("Сохранение поставщика");
            try
            {
                var model = new SupplierBindingModel
                {
                    Id = _id ?? Guid.Empty,
                    Name = textBoxName.Text,
                    Deals = Convert.ToInt32(numericUpDownDeals.Value),
                    AvailibleProducts = _supplierProducts
                };

                var operationResult = _id.HasValue ? _supplierLogic.Update(model) : _supplierLogic.Create(model);
                
                if (!operationResult)
                {
                    throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
                }
                MessageBox.Show("Сохранение прошло успешно", "Сообщение",
                MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Ошибка сохранения поставщика");
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
               MessageBoxIcon.Error);
            }
            finally
            {
                LoadData(); 
                _id = null;
                _supplierProducts.Clear();
                textBoxName.Text = string.Empty;
                numericUpDownDeals.Value = 0;
                groupBoxControls.Enabled = true;
                groupBoxControls.Show();
                groupBoxCreateSupplier.Enabled = false;
                groupBoxCreateSupplier.Hide();
                textBoxName.Text = string.Empty;
            }
        }
    }
}