using System;
using System.Data;
using System.Windows.Forms;


namespace WindowsFormsApp4
{
    public partial class ClientsForm : Form
    {
        private DataTable clientsTable;

        public ClientsForm()
        {
            InitializeComponent();
            AttachEventHandlers();
            LoadClients();
            ConfigureGrid();
        }

        private void AttachEventHandlers()
        {
            btnRefresh.Click += BtnRefresh_Click;
            btnAdd.Click += BtnAdd_Click;
            btnEdit.Click += BtnEdit_Click;
            btnDelete.Click += BtnDelete_Click;
            btnBack.Click += BtnBack_Click;
        }

        private void LoadClients()
        {
            clientsTable = DatabaseHelper.GetClients();
            dgvClients.DataSource = clientsTable;
            ConfigureGrid();
        }

        private void ConfigureGrid()
        {
            if (dgvClients.Columns.Count == 0) return;

            // Настройка заголовков
            if (dgvClients.Columns.Contains("id"))
                dgvClients.Columns["id"].HeaderText = "ID";

            if (dgvClients.Columns.Contains("last_name"))
                dgvClients.Columns["last_name"].HeaderText = "Фамилия";

            if (dgvClients.Columns.Contains("first_name"))
                dgvClients.Columns["first_name"].HeaderText = "Имя";

            if (dgvClients.Columns.Contains("middle_name"))
                dgvClients.Columns["middle_name"].HeaderText = "Отчество";

            if (dgvClients.Columns.Contains("phone"))
                dgvClients.Columns["phone"].HeaderText = "Телефон";

            // Настройка цвета строк
            dgvClients.DefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(50, 56, 67);
            dgvClients.DefaultCellStyle.ForeColor = System.Drawing.Color.FromArgb(203, 232, 87);
            dgvClients.DefaultCellStyle.SelectionBackColor = System.Drawing.Color.FromArgb(198, 141, 255);
            dgvClients.DefaultCellStyle.SelectionForeColor = System.Drawing.Color.FromArgb(50, 56, 67);
            dgvClients.ColumnHeadersDefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(198, 141, 255);
            dgvClients.ColumnHeadersDefaultCellStyle.ForeColor = System.Drawing.Color.FromArgb(50, 56, 67);
            dgvClients.EnableHeadersVisualStyles = false;

            dgvClients.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
        }

        private void BtnRefresh_Click(object sender, EventArgs e)
        {
            LoadClients();
        }

        private void BtnAdd_Click(object sender, EventArgs e)
        {
            ClientEditForm form = new ClientEditForm();
            if (form.ShowDialog() == DialogResult.OK)
            {
                LoadClients();
                MessageBox.Show("Клиент успешно добавлен", "Успешно",
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void BtnEdit_Click(object sender, EventArgs e)
        {
            if (dgvClients.CurrentRow == null)
            {
                MessageBox.Show("Выберите клиента для редактирования", "Ошибка",
                    MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            int clientId = Convert.ToInt32(dgvClients.CurrentRow.Cells["client_id"].Value);
            string lastName = dgvClients.CurrentRow.Cells["last_name"].Value.ToString();
            string firstName = dgvClients.CurrentRow.Cells["first_name"].Value.ToString();
            string middleName = dgvClients.CurrentRow.Cells["middle_name"].Value?.ToString();
            string phone = dgvClients.CurrentRow.Cells["phone"].Value.ToString();

            ClientEditForm form = new ClientEditForm(clientId, lastName, firstName, middleName, phone);
            if (form.ShowDialog() == DialogResult.OK)
            {
                LoadClients();
                MessageBox.Show("Клиент успешно обновлён", "Успешно",
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void BtnDelete_Click(object sender, EventArgs e)
        {
            if (dgvClients.CurrentRow == null)
            {
                MessageBox.Show("Выберите клиента для удаления", "Ошибка",
                    MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            int clientId = Convert.ToInt32(dgvClients.CurrentRow.Cells["client_id"].Value);
            string clientName = dgvClients.CurrentRow.Cells["last_name"].Value.ToString() + " " +
                                dgvClients.CurrentRow.Cells["first_name"].Value.ToString();

            DialogResult result = MessageBox.Show($"Удалить клиента {clientName}?",
                "Подтверждение удаления", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);

            if (result == DialogResult.Yes)
            {
                if (DatabaseHelper.DeleteClient(clientId))
                {
                    LoadClients();
                    MessageBox.Show("Клиент успешно удалён", "Успешно",
                        MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                else
                {
                    MessageBox.Show("Ошибка при удалении клиента", "Ошибка",
                        MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void BtnBack_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}