using BookShopContracts.BindingModels;
using BookShopContracts.BusinessLogicsContracts;
using BookShopContracts.SearchModels;
using BookShopContracts.ViewModels;
using BookShopDataModels.Models;
using Microsoft.Extensions.Logging;
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;

namespace BookShopView
{
    public partial class FormBook : Form
    {
        private readonly ILogger _logger;
        private readonly IBookLogic _logic;
        private readonly IGenreLogic _logicG;
        private int? _id;
        private Dictionary<int, IAuthorModel> _bookAuthors;
        public int Id { set { _id = value; } }
        public FormBook(ILogger<FormBook> logger, IBookLogic logic, IGenreLogic logicG)
        {
            InitializeComponent();
            _logger = logger;
            _logic = logic;
            _bookAuthors = new Dictionary<int, IAuthorModel>();
            _logicG = logicG;
        }
        
        private void FormBook_Load(object sender, EventArgs e)
        {
            _logger.LogInformation("Загрузка жанров");
            try
            {
                var list = _logicG.ReadList(null);
                if (list != null)
                {
                    comboBoxGenre.DisplayMember = "Genre";
                    comboBoxGenre.ValueMember = "ID";
                    comboBoxGenre.DataSource = list.Select(c => c.GenreName).ToList();
                    comboBoxGenre.SelectedItem = null;
                }
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Ошибка загрузки списка жанров");
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            if (_id.HasValue)
            {
                _logger.LogInformation("Загрузка книги");
                try
                {
                    var view = _logic.ReadElement(new BookSearchModel
                    {
                        Id = _id.Value
                    });
                    if (view != null)
                    {
                        TextBoxName.Text = view.BookName;
                        textBoxCost.Text = view.Cost.ToString();
                        textBoxCount.Text = view.Count.ToString();
                        comboBoxGenre.SelectedIndex = view.GenreId;
                        _bookAuthors = view.BookAuthors ?? new Dictionary<int, IAuthorModel>();
                        LoadData();
                    }
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Ошибка загрузки книги");
                    MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
                    MessageBoxIcon.Error);
                }
            }
        }
        private void LoadData()
        {
            _logger.LogInformation("Загрузка автора книги");
            try
            {
                if (_bookAuthors != null)
                {

                    dataGridView.Rows.Clear();
                    foreach (var pc in _bookAuthors)
                    {
                        dataGridView.Rows.Add(new object[] { pc.Key, pc.Value.AuthorSurname });
                    }
                }
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Ошибка загрузки автора книги");
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void ButtonAdd_Click(object sender, EventArgs e)
        {
            var service = Program.ServiceProvider?.GetService(typeof(FormBookAuthor));
            if (service is FormBookAuthor form)
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    if (form.AuthorModel == null)
                    {
                        return;
                    }
                    if (_bookAuthors.ContainsKey(form.Id))
                    {
                        _bookAuthors[form.Id] = (form.AuthorModel);
                    }
                    else
                    {
                        _bookAuthors.Add(form.Id, (form.AuthorModel));
                    }
                    _logger.LogInformation("Добавление автора:{ AuthorSurname}", form.AuthorModel.AuthorSurname);
                    LoadData();
                }
            }
        }
        private void ButtonUpd_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count == 1)
            {
                var service =
               Program.ServiceProvider?.GetService(typeof(FormBookAuthor));
                if (service is FormBookAuthor form)
                {
                    int id =
                   Convert.ToInt32(dataGridView.SelectedRows[0].Cells[0].Value);
                    form.Id = id;
                    if (form.ShowDialog() == DialogResult.OK)
                    {
                        if (form.AuthorModel == null)
                        {
                            return;
                        }
                        _logger.LogInformation("Изменение компонента:{ ComponentName} - { Count}", form.AuthorModel.AuthorSurname);
                        _bookAuthors[form.Id] = (form.AuthorModel);
                        LoadData();
                    }
                }
            }
        }
        private void ButtonDel_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count == 1)
            {
                if (MessageBox.Show("Удалить запись?", "Вопрос", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    try
                    {
                        _logger.LogInformation("Удаление компонента: { AuthorSurname}", dataGridView.SelectedRows[0].Cells[1].Value);
                        _bookAuthors?.Remove(Convert.ToInt32(dataGridView.SelectedRows[0].Cells[0].Value));
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }

                    LoadData();
                }
            }
        }
        private void ButtonRef_Click(object sender, EventArgs e)
        {
            LoadData();
        }
        private void ButtonSave_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(TextBoxName.Text))
            {
                MessageBox.Show("Заполните название", "Ошибка",
               MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            if (string.IsNullOrEmpty(textBoxCost.Text))
            {
                MessageBox.Show("Заполните цену", "Ошибка", MessageBoxButtons.OK,
               MessageBoxIcon.Error);
                return;
            }
            if (string.IsNullOrEmpty(textBoxCount.Text))
            {
                MessageBox.Show("Заполните количество", "Ошибка", MessageBoxButtons.OK,
               MessageBoxIcon.Error);
                return;
            }
            if (comboBoxGenre.SelectedItem == null)
            {
                MessageBox.Show("Выберите жанр", "Ошибка",
               MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            if (_bookAuthors == null || _bookAuthors.Count == 0)
            {
                MessageBox.Show("Заполните авторов", "Ошибка",
               MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            _logger.LogInformation("Сохранение изделия");
            try
            {
                var model = new BookBindingModel
                {
                    Id = _id ?? 0,
                    BookName = TextBoxName.Text,
                    Cost = Convert.ToDouble(textBoxCost.Text),
                    Count = Convert.ToInt32(textBoxCount.Text),
                    GenreId = comboBoxGenre.SelectedIndex + 1,
                    BookAuthors = _bookAuthors
                };
                var operationResult = _id.HasValue ? _logic.Update(model) :
               _logic.Create(model);
                if (!operationResult)
                {
                    throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
                }
                MessageBox.Show("Сохранение прошло успешно", "Сообщение",
               MessageBoxButtons.OK, MessageBoxIcon.Information);
                DialogResult = DialogResult.OK;
                Close();
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Ошибка сохранения книги");
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void ButtonCancel_Click(object sender, EventArgs e)
        {
            DialogResult = DialogResult.Cancel;
            Close();
        }
    }
}