using AircraftPlantContracts.BusinessLogicsContracts;
using AircraftPlantContracts.SearchModels;
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 AircraftPlantView
{
    /// <summary>
    /// Форма для вывода писем
    /// </summary>
    public partial class FormMail : Form
    {
        /// <summary>
        /// Логгер
        /// </summary>
        private readonly ILogger _logger;

        /// <summary>
        /// Бизнес-логика для писем
        /// </summary>
        private readonly IMessageInfoLogic _logic;

        /// <summary>
        /// Размер страницы пагинации
        /// </summary>
        private int PageSize = 3;

        /// <summary>
        /// Текущая страница пагинации
        /// </summary>
        private int CurrentPage = 1;

        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="logger"></param>
        /// <param name="logic"></param>
        public FormMail(ILogger<FormMail> logger, IMessageInfoLogic logic)
        {
            InitializeComponent();

            _logger = logger;
            _logic = logic;
        }

        /// <summary>
        /// Загрузка писем
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FormMail_Load(object sender, EventArgs e)
        {
            LoadData();
        }

        /// <summary>
        /// Кнопка переключения на предыдущую страницу
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonPrev_Click(object sender, EventArgs e)
        {
            if (CurrentPage - 1 <= 0)
            {
                return;
            }

            CurrentPage--;
            LoadData();
        }

        /// <summary>
        /// Кнопка переключения на следующую страницу
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonNext_Click(object sender, EventArgs e)
        {
            CurrentPage++;
            LoadData();
        }

        /// <summary>
        /// Кнопка "Отправить"
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonReply_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count == 1)
            {
                var service = Program.ServiceProvider?.GetService(typeof(FormMessage));
                if (service is FormMessage form)
                {
                    form.MessageId = Convert.ToString(dataGridView.SelectedRows[0].Cells["MessageId"].Value);
                    if (form.ShowDialog() == DialogResult.OK)
                    {
                        LoadData();
                    }
                }
            }
        }

        /// <summary>
        /// Метод загрузки писем
        /// </summary>
        private void LoadData()
        {
            try
            {
                var list = _logic.ReadList(new MessageInfoSearchModel
                {
                    PageSize = PageSize,
                    CurrentPage = CurrentPage
                });

                if (list != null && list.Count == 0 && CurrentPage != 1)
                {
                    CurrentPage--;
                    list = _logic.ReadList(new MessageInfoSearchModel
                    {
                        PageSize = PageSize,
                        CurrentPage = CurrentPage
                    });
                }

                if (list != null)
                {
                    dataGridView.DataSource = list;
                    dataGridView.Columns["MessageId"].Visible = false;
                    dataGridView.Columns["ClientId"].Visible = false;
                    dataGridView.Columns["Body"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
                }
                labelPage.Text = $"Страница {CurrentPage}";
                _logger.LogInformation("Загрузка писем");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Ошибка загрузки писем");
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}