using System;
using System.IO;
using System.Linq;
using System.Windows.Forms;

using PKHeX.Core;

namespace PKHeX.WinForms
{
    public partial class SettingsEditor : Form
    {
        public bool BlankChanged { get; private set; }

        public SettingsEditor(object obj)
        {
            InitializeComponent();
            LoadSettings(obj);

            if (obj is PKHeXSettings s)
            {
                var noSelectVersions = new[] {GameVersion.GO};
                CB_Blank.InitializeBinding();
                CB_Blank.DataSource = GameInfo.VersionDataSource.Where(z => !noSelectVersions.Contains((GameVersion)z.Value)).ToList();
                CB_Blank.SelectedValue = (int) s.Startup.DefaultSaveVersion;
                CB_Blank.SelectedValueChanged += (_, _) => s.Startup.DefaultSaveVersion = (GameVersion)WinFormsUtil.GetIndex(CB_Blank);
                CB_Blank.SelectedIndexChanged += (_, _) => BlankChanged = true;
                B_Reset.Click += (x, e) => DeleteSettings();
            }
            else
            {
                FLP_Blank.Visible = false;
                B_Reset.Visible = false;
            }

            this.CenterToForm(FindForm());
        }

        private void LoadSettings(object obj)
        {
            var type = obj.GetType();
            var props = ReflectUtil.GetPropertiesCanWritePublicDeclared(type);
            foreach (var p in props)
            {
                var state = ReflectUtil.GetValue(obj, p);
                if (state is null)
                    continue;

                var tab = new TabPage(p);
                var pg = new PropertyGrid { SelectedObject = state, Dock = DockStyle.Fill };
                tab.Controls.Add(pg);
                tabControl1.TabPages.Add(tab);
            }
        }

        private void SettingsEditor_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.W && ModifierKeys == Keys.Control)
                Close();
        }

        private static void DeleteSettings()
        {
            try
            {
                var dr = WinFormsUtil.Prompt(MessageBoxButtons.YesNo, "Resetting settings requires the program to exit.", MessageStrings.MsgContinue);
                if (dr != DialogResult.Yes)
                    return;
                var path = Main.ConfigPath;
                if (File.Exists(path))
                    File.Delete(path);
                System.Diagnostics.Process.Start(Application.ExecutablePath);
                Environment.Exit(0);
            }
            catch (Exception ex)
            {
                WinFormsUtil.Error("Failed to delete settings.", ex.Message);
            }
        }
    }
}