using System;
using System.ComponentModel;
using System.Windows.Forms;
using DevExpress.XtraTab;
using Lskj.Business;
using Lskj.Model;

namespace Lskj.Main.Control
{
    /// <summary>新版 WPF 主界面的 WinForms 过渡版。</summary>
    public partial class MainPanelControlEx2 : UserControl
    {
        private ToolStripMenuItem _selectedTopMenu;
        private bool _styleUpdatePending;
        private bool _shortcutRedrawSuppressed;
        private string _styledSubSysId;
        private string _styledSubSysName;

        public MainPanelControlEx2()
        {
            InitializeComponent();
            // 运行时必须等旧控件 OnLoad 完成后再改菜单布局；否则旧逻辑会按
            // 构造阶段的默认宽度计算“更多”，导致一级目录全部被收进去。
            // 设计器不会触发业务 OnLoad，因此仅在设计时直接套用预览样式。
            if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
                ApplyWpfShellStyle();
        }

        public float DpiX { get { return _legacyPanel.DpiX; } set { _legacyPanel.DpiX = value; } }
        public float DpiY { get { return _legacyPanel.DpiY; } set { _legacyPanel.DpiY = value; } }
        public int plTopHeight { get { return _legacyPanel.plTopHeight; } }
        public FormWindowState State { get { return _legacyPanel.State; } set { _legacyPanel.State = value; } }
        public XtraTabControl TabMain { get { return _legacyPanel.TabMain; } }
        public Panel MainPanel { get { return _legacyPanel.MainPanel; } }
        public AwaitScreenControl AwaitControl { get { return _legacyPanel.AwaitControl; } }
        public PictureBox pic_search { get { return _legacyPanel.pic_search; } }
        public event EventHandler OnMaxButtonCallBack { add { _legacyPanel.OnMaxButtonCallBack += value; } remove { _legacyPanel.OnMaxButtonCallBack -= value; } }
        public event EventHandler OnMinButtonCallBack { add { _legacyPanel.OnMinButtonCallBack += value; } remove { _legacyPanel.OnMinButtonCallBack -= value; } }
        public event EventHandler OnCloseButtonCallBack { add { _legacyPanel.OnCloseButtonCallBack += value; } remove { _legacyPanel.OnCloseButtonCallBack -= value; } }
        public event EventHandler OnTopPanelMouseDoubleClickCallBack { add { _legacyPanel.OnTopPanelMouseDoubleClickCallBack += value; } remove { _legacyPanel.OnTopPanelMouseDoubleClickCallBack -= value; } }
        public event MouseEventHandler OnTopMouseDownCallback { add { _legacyPanel.OnTopMouseDownCallback += value; } remove { _legacyPanel.OnTopMouseDownCallback -= value; } }
        public event MouseEventHandler OnTopMouseUpCallBack { add { _legacyPanel.OnTopMouseUpCallBack += value; } remove { _legacyPanel.OnTopMouseUpCallBack -= value; } }
        public event MouseEventHandler OnTopMouseMoveCallBack { add { _legacyPanel.OnTopMouseMoveCallBack += value; } remove { _legacyPanel.OnTopMouseMoveCallBack -= value; } }

        /// <summary>保持旧 FrmMain 的 OnLoad 调用契约，在菜单绑定完成后应用新版样式。</summary>
        public void OnLoad()
        {
            _legacyPanel.OnLoad();
            ApplyWpfShellStyle();
        }

        private void TopMenuItem_Click(object sender, EventArgs e)
        {
            SelectTopMenu(sender as ToolStripMenuItem);
            ResetBrandArea();
            // 切换一级目录时旧逻辑会重建左侧菜单，下一帧重新套用新版布局。
            if (IsNavigationChangedSinceLastStyle())
                RequestApplyWpfShellStyle();
        }

        private static bool IsGroupedSidebarMode()
        {
            // 设计器预览不能访问数据库；预览时直接采用新版分组侧栏样式。
            if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
                return true;
            // 与旧主界面使用同一份系统参数，避免新版界面出现目录不一致。
            return "1".Equals((SystemInfo.Instance.MainLeftShowMode ?? string.Empty).Trim());
        }

        private bool IsNavigationChangedSinceLastStyle()
        {
            if (LicenseManager.UsageMode == LicenseUsageMode.Designtime) return false;
            string id = (ERPInfo.Instance.SubSysId ?? string.Empty).Trim();
            string name = (ERPInfo.Instance.SubSysName ?? string.Empty).Trim();
            return !string.Equals(id, _styledSubSysId, StringComparison.OrdinalIgnoreCase)
                || !string.Equals(name, _styledSubSysName, StringComparison.OrdinalIgnoreCase);
        }

        private void RememberStyledNavigation()
        {
            if (LicenseManager.UsageMode == LicenseUsageMode.Designtime) return;
            _styledSubSysId = (ERPInfo.Instance.SubSysId ?? string.Empty).Trim();
            _styledSubSysName = (ERPInfo.Instance.SubSysName ?? string.Empty).Trim();
        }

        /// <summary>
        /// 合并同一消息循环内由顶部菜单点击、下拉框关闭等事件发起的重复重绘。
        /// 旧版切换目录本身已经重建快捷通道，重复套用样式会造成右侧闪烁。
        /// </summary>
        private void RequestApplyWpfShellStyle()
        {
            if (!IsHandleCreated || _styleUpdatePending) return;
            _styleUpdatePending = true;
            BeginInvoke((MethodInvoker)(() =>
            {
                _styleUpdatePending = false;
                if (!IsDisposed)
                {
                    ApplyWpfShellStyle();
                    if (_shortcutRedrawSuppressed) SetShortcutRedraw(true);
                }
            }));
        }
    }
}