using ElectronicDiaryAbstractions.Models;
using ElectronicDiaryAbstractions.WorkAbstractions;

namespace ElectronicDiaryView
{
    public partial class FormGrade : Form
    {
        private readonly IGradeWork _gradeLogic;

        private readonly ITeacherWork _teacherLogic;

        public FormGrade(IGradeWork gradeLogic, ITeacherWork teacherLogic)
        {
            InitializeComponent();
            _gradeLogic = gradeLogic;
            _teacherLogic = teacherLogic;
        }

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

        private void LoadData()
        {
            var grades = _gradeLogic.GetAll();

            dataGridView.Rows.Clear();

            if (dataGridView.ColumnCount == 0)
            {
                dataGridView.Columns.Add("Id", "ID");
                dataGridView.Columns.Add("Name", "Наименование класса");
                dataGridView.Columns.Add("TeacherId", "TeacherId");
                dataGridView.Columns["TeacherId"].Visible = false;
                dataGridView.Columns.Add("TeacherName", "Классный руководитель");
            }

            dataGridView.Columns["Name"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            dataGridView.Columns["TeacherName"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;

            comboBoxTeacher.DataSource = _teacherLogic.GetAll().Select(x =>
                new { x.Id, FullName = x.LastName + " " + x.FirstName + " " + x.Patronymic }
                ).ToList();
            comboBoxTeacher.DisplayMember = "FullName";
            comboBoxTeacher.ValueMember = "Id";

            foreach (var grade in grades)
            {
                var teacher = _teacherLogic.Get(grade.TeacherId);
                dataGridView.Rows.Add(grade.Id, grade.Name, grade.TeacherId, teacher?.LastName + " " + teacher?.FirstName + " " + teacher?.Patronymic);
            }
        }

        private void ButtonCreate_Click(object sender, EventArgs e)
        {
            Grade newGrade = new()
            {
                Name = textBoxName.Text,
                TeacherId = ((dynamic)comboBoxTeacher.SelectedItem).Id,
            };

            _gradeLogic.Create(newGrade);

            LoadData();
        }

        private void ButtonUpdate_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                DataGridViewRow selectedRow = dataGridView.SelectedRows[0];
                int gradeId = Convert.ToInt32(selectedRow.Cells["Id"].Value);

                Grade updatedGrade = new()
                {
                    Id = gradeId,
                    Name = textBoxName.Text,
                    TeacherId = ((dynamic)comboBoxTeacher.SelectedItem).Id,
                };

                _gradeLogic.Update(updatedGrade);

                LoadData();
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите класс, который необходимо обновить");
            }
        }

        private void ButtonDelete_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                DataGridViewRow selectedRow = dataGridView.SelectedRows[0];
                int gradeId = Convert.ToInt32(selectedRow.Cells["Id"].Value);

                _gradeLogic.Delete(gradeId);

                LoadData();
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите класс, который необходимо удалить");
            }
        }

        private void DataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex >= 0)
            {
                DataGridViewRow row = dataGridView.Rows[e.RowIndex];
                textBoxName.Text = row.Cells["Name"].Value.ToString();
                comboBoxTeacher.SelectedValue = Convert.ToInt32(row.Cells["TeacherId"].Value);
            }
        }
    }
}