using System;
using System.Data;
using System.Data.SQLite;
using System.Windows.Forms;
using Электронная_Фармация.Classes;

namespace Электронная_Фармация.Forms
{
    public partial class FConsignees : Form
    {
        public string SelectedConsigneeNameAfterSave { get; private set; } = string.Empty;

        public FConsignees()
        {
            InitializeComponent();
        }

        private void FConsignees_Load(object sender, EventArgs e)
        {
            UiThemeHelper.ApplyToControlTree(this);
            showMeContentFromConsigneesTable();
        }

        void showMeContentFromConsigneesTable()
        {
            using (SQLiteConnection conConsignees = new SQLiteConnection(AppConfig.SqliteConnectionString))
            {
                string selectFromConsignees = @"
select [idConsignees] as [Id],
[codeConsignees] as [Код],
[ConsigneesName] as [Наименование],
[ConsigneesAddress] as [Адрес],
ifnull([LocationId], '') as [Location ID],
[ConsigneesUseAsDefault] as [По умолчанию]
from [Consignees]
order by [ConsigneesUseAsDefault] desc, [ConsigneesName]";
                try
                {
                    conConsignees.Open();
                    SQLiteCommand cmdShowConsigneesList = new SQLiteCommand(selectFromConsignees, conConsignees);
                    DataTable tableConsignees = new DataTable();
                    SQLiteDataAdapter daConsigneeList = new SQLiteDataAdapter(cmdShowConsigneesList);
                    daConsigneeList.Fill(tableConsignees);
                    dgvConsignees.DataSource = tableConsignees;
                    if (dgvConsignees.Columns.Contains("Id"))
                    {
                        dgvConsignees.Columns["Id"].Visible = false;
                    }

                    foreach (DataGridViewColumn column in dgvConsignees.Columns)
                    {
                        column.ReadOnly = column.Name != "Location ID" && column.Name != "Адрес";
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show($"Возникла ошибка при заполнении данных о грузополучателях.\nТекст ошибки:\n{ex}", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void txtInteractiveShowMeConsignees_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter)
            {
                if (dgvConsignees.Rows.Count > 0 && dgvConsignees.DataSource is DataTable table)
                {
                    table.DefaultView.RowFilter = $"[Наименование] like '%{txtInteractiveShowMeConsignees.Text.Replace("'", "''")}%'";
                    if (dgvConsignees.Rows.Count == 0)
                    {
                        showMeContentFromConsigneesTable();
                    }
                }
                else
                {
                    showMeContentFromConsigneesTable();
                }
                txtInteractiveShowMeConsignees.Text = string.Empty;
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            if (!(dgvConsignees.DataSource is DataTable table))
            {
                return;
            }

            dgvConsignees.EndEdit();

            // Кто должен стать активной аптекой после сохранения.
            // По вашему ТЗ: "аптека выбранная в этом окне" => текущая выделенная строка.
            var selectedName = dgvConsignees.CurrentRow?.Cells["Наименование"]?.Value?.ToString()?.Trim()
                                ?? string.Empty;
            SelectedConsigneeNameAfterSave = selectedName;

            using (var connection = new SQLiteConnection(AppConfig.SqliteConnectionString))
            {
                connection.Open();
                using (var tx = connection.BeginTransaction())
                {
                    foreach (DataRow row in table.Rows)
                    {
                        if (row.RowState == DataRowState.Unchanged)
                        {
                            continue;
                        }

                        using (var cmd = new SQLiteCommand(
                            @"UPDATE Consignees
                              SET ConsigneesAddress = @address,
                                  LocationId = @locationId
                              WHERE idConsignees = @id",
                            connection,
                            tx))
                        {
                            cmd.Parameters.AddWithValue("@address", row["Адрес"]?.ToString() ?? string.Empty);
                            cmd.Parameters.AddWithValue("@locationId", row["Location ID"]?.ToString()?.Trim() ?? string.Empty);
                            cmd.Parameters.AddWithValue("@id", Convert.ToInt64(row["Id"]));
                            cmd.ExecuteNonQuery();
                        }
                    }

                    tx.Commit();
                }
            }

            table.AcceptChanges();
            ToastNotification.ShowSuccess("Грузополучатели сохранены");

            if (!string.IsNullOrWhiteSpace(selectedName))
            {
                ConsigneeHelper.SetActiveConsignee(selectedName);
            }

            DialogResult = DialogResult.OK;
            Close();
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            using (var dialog = new Form())
            {
                dialog.Text = "Новая аптека";
                dialog.FormBorderStyle = FormBorderStyle.FixedDialog;
                dialog.StartPosition = FormStartPosition.CenterParent;
                // Немного увеличиваем высоту/ширину на случай DPI/шрифтов.
                dialog.ClientSize = new System.Drawing.Size(480, 310);
                dialog.MaximizeBox = false;
                dialog.MinimizeBox = false;
                dialog.ShowInTaskbar = false;

                var lblName = new Label { Text = "Наименование", Left = 16, Top = 16, AutoSize = true };
                var txtName = new TextBox { Left = 16, Top = 42, Width = 440, Height = 28 };
                var lblAddress = new Label { Text = "Адрес", Left = 16, Top = 82, AutoSize = true };
                var txtAddress = new TextBox { Left = 16, Top = 108, Width = 440, Height = 28 };
                var lblLocation = new Label { Text = "Location ID", Left = 16, Top = 148, AutoSize = true };
                var txtLocation = new TextBox { Left = 16, Top = 174, Width = 440, Height = 28 };

                var btnOk = new Elfisa.UI.Controls.ModernButton
                {
                    Text = "Добавить",
                    DialogResult = DialogResult.OK
                };
                var btnCancel = new Elfisa.UI.Controls.ModernButton
                {
                    Text = "Отмена",
                    DialogResult = DialogResult.Cancel
                };

                dialog.Controls.AddRange(new Control[]
                {
                    lblName, txtName, lblAddress, txtAddress, lblLocation, txtLocation, btnOk, btnCancel
                });
                dialog.AcceptButton = btnOk;
                dialog.CancelButton = btnCancel;
                UiThemeHelper.ApplyToControlTree(dialog);

                btnOk.Padding = new Padding(12, 4, 12, 4);
                btnCancel.Padding = new Padding(12, 4, 12, 4);
                Elfisa.UI.Controls.ModernButtonStyles.FitToText(btnOk, 36);
                Elfisa.UI.Controls.ModernButtonStyles.FitToText(btnCancel, 36);
                btnOk.Height = 36;
                btnCancel.Height = 36;

                const int padding = 16;
                const int gap = 10;

                // Минимально гарантируем ширину, чтобы обе кнопки поместились.
                var requiredWidth = btnOk.Width + btnCancel.Width + gap + padding * 2;
                if (dialog.ClientSize.Width < requiredWidth)
                {
                    dialog.ClientSize = new System.Drawing.Size(requiredWidth, dialog.ClientSize.Height);
                }

                // Всегда зажимаем в границы формы после вычисления ширины ModernButton'ов.
                btnCancel.Left = Math.Max(padding, dialog.ClientSize.Width - btnCancel.Width - padding);
                btnCancel.Top = dialog.ClientSize.Height - btnCancel.Height - padding;

                btnOk.Left = Math.Max(padding, btnCancel.Left - btnOk.Width - gap);
                btnOk.Top = btnCancel.Top;

                if (dialog.ShowDialog(this) != DialogResult.OK)
                {
                    return;
                }

                var name = (txtName.Text ?? string.Empty).Trim();
                var address = (txtAddress.Text ?? string.Empty).Trim();
                var locationId = (txtLocation.Text ?? string.Empty).Trim();
                if (string.IsNullOrWhiteSpace(name))
                {
                    UiDialogs.ShowError("Укажите наименование аптеки.", "Грузополучатели", this);
                    return;
                }

                using (var connection = new SQLiteConnection(AppConfig.SqliteConnectionString))
                {
                    connection.Open();
                    int nextCode = 1;
                    using (var codeCmd = new SQLiteCommand("SELECT ifnull(MAX(codeConsignees), 0) + 1 FROM Consignees", connection))
                    {
                        nextCode = Convert.ToInt32(codeCmd.ExecuteScalar());
                    }

                    using (var insert = new SQLiteCommand(
                        @"INSERT INTO Consignees (codeConsignees, ConsigneesName, ConsigneesAddress, ConsigneesUseAsDefault, LocationId)
                          VALUES (@code, @name, @address, 0, @locationId)",
                        connection))
                    {
                        insert.Parameters.AddWithValue("@code", nextCode);
                        insert.Parameters.AddWithValue("@name", name);
                        insert.Parameters.AddWithValue("@address", address);
                        insert.Parameters.AddWithValue("@locationId", locationId);
                        insert.ExecuteNonQuery();
                    }
                }

                ToastNotification.ShowSuccess("Аптека добавлена");
                showMeContentFromConsigneesTable();
            }
        }

        private void btnSetDefault_Click(object sender, EventArgs e)
        {
            if (dgvConsignees.CurrentRow == null)
            {
                UiDialogs.ShowInfo("Выберите аптеку в списке.", "Грузополучатели", this);
                return;
            }

            var name = dgvConsignees.CurrentRow.Cells["Наименование"]?.Value?.ToString();
            if (string.IsNullOrWhiteSpace(name))
            {
                return;
            }

            ConsigneeHelper.SetActiveConsignee(name);
            ToastNotification.ShowSuccess($"Аптека по умолчанию: {name}");
            showMeContentFromConsigneesTable();
        }
    }
}