using System;
using System.Windows.Forms;

namespace SymbolLibManager
{
    /// <summary>
    /// 符号管理
    /// 要点：
    /// 1、用户多次点击 -> 不应该弹出多个窗口
    /// 2、窗口被最小化、置后 -> 再点时要“恢复 + 激活“
    /// 3、窗口被关闭/句柄销毁 -> 静态引用要清理
    /// </summary>
    public class SymbolManager : SymbolLibInterface.ISymbolManager
    {
        private static FrmMarkMain frmMain;
        
        public void ShowSymbolEditor(string symbolPath)
        {
            ShowSymbolEditor(null, symbolPath);
        }
        public void ShowSymbolEditor(object sender, string symbolPath)
        {
            if (frmMain == null)
            {
                if (!(sender is GeoSigma.UCDraw.MainView view) || view.ViewControl.Geo == null)
                {
                    frmMain = new FrmMarkMain(symbolPath);
                }
                else
                {
                    frmMain = new FrmMarkMain(view.ViewControl.Geo, symbolPath);
                }

                frmMain.HandleDestroyed += FrmMain_HandleDestroyed;
                frmMain.Show();
            }
            else
            {
                if (frmMain.WindowState == FormWindowState.Minimized)
                {
                    frmMain.WindowState = FormWindowState.Normal;
                }

                frmMain.Activate();
                frmMain.BringToFront();
            }
        }

        private void FrmMain_HandleDestroyed(object sender, EventArgs e)
        {
            frmMain = null;
        }

        private string selectedSymbolName;
        public Form CreateSymbolSelectForm(GeoSigmaDrawLib.GeoSigmaXY geo,
            string symbolPath,
            Func<string, string> acceptSymbolName)
        {
            FrmSymbolSelect frm = new FrmSymbolSelect(geo, symbolPath, ref selectedSymbolName);
            frm.FormClosed += (sender, arg) =>
            {
                acceptSymbolName?.Invoke(frm.SelectedSymbolName);
            };
            return frm;
        }
    }
}