using BlogBusinessLogic;
using BlogContracts.BindingModels;
using BlogContracts.BusinessLogicContracts;
using BlogContracts.SearchModels;
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 Blog
{
    public partial class FormCreateMessage : Form
    {
        private readonly IMessageLogic _messageLogic;
        private readonly ICategoryLogic _categoryLogic;
        private readonly ITopicLogic _topicLogic;
        private readonly IUserLogic _userLogic;

        private int? _id;
        public int Id { set { _id = value; } }
        public FormCreateMessage(ICategoryLogic categoryLogic, ITopicLogic topicLogic, IUserLogic userLogic, IMessageLogic messageLogic)
        {
            InitializeComponent();
            _categoryLogic = categoryLogic;
            _topicLogic = topicLogic;
            _userLogic = userLogic;
            _messageLogic = messageLogic;
        }

        private void buttonSave_Click(object sender, EventArgs e)
        {
            if (comboBoxCategory.SelectedValue == null)
            {
                MessageBox.Show("Выберите категорию", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            if (comboBoxTopic.SelectedValue == null)
            {
                MessageBox.Show("Выберите тему", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            if (comboBoxUser.SelectedValue == null)
            {
                MessageBox.Show("Выберите пользователя", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            if (string.IsNullOrEmpty(textBoxMessage.Text))
            {
                MessageBox.Show("Напишите сообщение", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            try
            {
                var model = new MessageBindingModel
                {
                    Id = _id ?? 0,
                    Date = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Utc),
                    Text = textBoxMessage.Text,
                    TopicId = Convert.ToInt32(comboBoxTopic.SelectedValue),
                    UserId = Convert.ToInt32(comboBoxUser.SelectedValue),
                };
                var operationResult = _id.HasValue ? _messageLogic.Update(model) : _messageLogic.Create(model);
                if (!operationResult)
                {
                    throw new Exception("Ошибка при создании сообщения.");
                }
                MessageBox.Show("Сохранение прошло успешно", "Сообщение", MessageBoxButtons.OK, MessageBoxIcon.Information);
                DialogResult = DialogResult.OK;
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void buttonCancel_Click(object sender, EventArgs e)
        {

        }

        private void FormCreateMessage_Load(object sender, EventArgs e)
        {
            LoadData();
        }

        private void LoadData()
        {
            try
            {
                var user = _userLogic.ReadList(null);
                if (user != null)
                {
                    comboBoxUser.DisplayMember = "Username";
                    comboBoxUser.ValueMember = "Id";
                    comboBoxUser.DataSource = user;
                    comboBoxUser.SelectedItem = null;
                }
                var category = _categoryLogic.ReadList(null);
                if (category != null)
                {
                    comboBoxCategory.DisplayMember = "Name";
                    comboBoxCategory.ValueMember = "Id";
                    comboBoxCategory.DataSource = category;
                    comboBoxCategory.SelectedItem = null;
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void comboBoxCategory_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                var topics = _topicLogic.ReadList(new TopicSearchModel { CategoryId = Convert.ToInt32(comboBoxCategory.SelectedValue), });
                if (topics != null)
                {
                    comboBoxTopic.DisplayMember = "Name";
                    comboBoxTopic.ValueMember = "Id";
                    comboBoxTopic.DataSource = topics;
                    comboBoxTopic.SelectedItem = null;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}