using ElectronicDiaryAbstractions.Models;
using ElectronicDiaryAbstractions.WorkAbstractions;

namespace ElectronicDiaryView
{
    public partial class FormTeacher : Form
    {
        private readonly ITeacherWork _teacherLogic;

        private readonly IUserWork _userLogic;

        private readonly ISubjectWork _subjectLogic;

        public FormTeacher(ITeacherWork teacherLogic, IUserWork userLogic, ISubjectWork subjectLogic)
        {
            InitializeComponent();
            _teacherLogic = teacherLogic;
            _userLogic = userLogic;
            _subjectLogic = subjectLogic;
        }

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

        private void LoadData()
        {
            var teachers = _teacherLogic.GetAll();

            dataGridView.Rows.Clear();

            if (dataGridView.ColumnCount == 0)
            {
                dataGridView.Columns.Add("Id", "ID");
                dataGridView.Columns.Add("Name", "Имя учителя");
                dataGridView.Columns.Add("UserId", "UserId");
                dataGridView.Columns["UserId"].Visible = false;
                dataGridView.Columns.Add("UserLogin", "Логин");
            }

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

            comboBoxSubject.DataSource = _subjectLogic.GetAll();
            comboBoxSubject.DisplayMember = "Name";
            comboBoxSubject.ValueMember = "Id";

            foreach (var teacher in teachers)
            {
                dataGridView.Rows.Add(teacher.Id, teacher.LastName + " " + teacher.FirstName + " " + teacher.Patronymic, teacher.UserId, _userLogic.Get(teacher.UserId)?.Login);
            }
        }

        private void ButtonCreate_Click(object sender, EventArgs e)
        {
            int someNumber = _userLogic.GetAll().Max(user => user.Id) + 1;
            User newUser = new()
            {
                Login = "login" + someNumber,
                Email = "email" + someNumber,
                Password = "password" + someNumber,
                PhoneNumber = "phonenumber" + someNumber,
                AccessLevel = "Учитель",
            };
            _userLogic.Create(newUser);
            int newUserId = _userLogic.GetAll().Max(user => user.Id);

            Teacher newTeacher = new()
            {
                LastName = textBoxLastName.Text,
                FirstName = textBoxFirstName.Text,
                Patronymic = textBoxPatronymic.Text,
                UserId = newUserId,
            };

            _teacherLogic.Create(newTeacher);

            LoadData();
        }

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

                Teacher updatedTeacher = new()
                {
                    Id = teacherId,
                    LastName = textBoxLastName.Text,
                    FirstName = textBoxFirstName.Text,
                    Patronymic = textBoxPatronymic.Text,
                };

                _teacherLogic.Update(updatedTeacher);

                LoadData();
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите учителя, информацию о котором необходимо обновить");
            }
        }

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

                _teacherLogic.Delete(teacherId);

                LoadData();
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите учителя, информацию о котором необходимо удалить");
            }
        }

        private void ButtonGetSubjects_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                var service = Program.ServiceProvider?.GetService(typeof(FormSubjects));
                if (service is FormSubjects form)
                {
                    form.Id = Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
                    form.IsStudent = false;
                    form.ShowDialog();
                }
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите учителя, информацию о предметах которого необходимо посмотреть");
            }
        }

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

                _teacherLogic.AddTeacherSubject(teacherId, ((Subject)comboBoxSubject.SelectedItem).Id);
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите учителя, с которым необходимо связать предмет");
            }
        }

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

                _teacherLogic.DeleteTeacherSubject(teacherId, ((Subject)comboBoxSubject.SelectedItem).Id);
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите учителя, от которого необходимо отвязать предмет");
            }
        }

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

                _teacherLogic.DeleteAllTeacherSubjects(teacherId);

                LoadData();
            }
            else
            {
                MessageBox.Show("Пожалуйста, выберите учителя, информацию о предметах которого необходимо удалить");
            }
        }

        private void DataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex >= 0)
            {
                DataGridViewRow row = dataGridView.Rows[e.RowIndex];
                string[] nameParts = (row != null && row.Cells["Name"] != null) ? row.Cells["Name"].Value.ToString().Split(' ') : new string[] { "", "", "" };
                textBoxLastName.Text = nameParts[0];
                textBoxFirstName.Text = nameParts[1];
                textBoxPatronymic.Text = nameParts[2];
            }
        }
    }
}