/*
 * MainForm:主窗体(报价工具 + PDF 查看器)
 * 由 cadbt 改造:WebView2 网页 CAD → pdfium 原生 PDF 查看 + 框选 OCR
 */
using System;
using System.IO;
using System.Windows.Forms;

namespace pdfbt
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
            CreateDockWindows_dockSurface1();

            // ★ 全局 F1/F2/F3 过滤器:焦点在任何 WinForms 控件上都触发元件合并
            //   (与 cadbt 一致,两路都汇聚到 PdfBridge.F*Requested)
            Application.AddMessageFilter(new F1MessageFilter());
            FormClosed += (s, e) => Application.RemoveMessageFilter(f1Filter);

            // ★ Umi-OCR 预热:已装本体且当前引擎为 umi 时,主程序一启动就静默拉起
            //   (--hide 托盘),不等首次框选;后台线程跑,不拖慢窗口出现
            System.Threading.ThreadPool.QueueUserWorkItem(_ =>
            {
                try
                {
                    if (File.Exists(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "baidu_ocr.json")))
                    {
                        var jsv = new System.Web.Script.Serialization.JavaScriptSerializer()
                            .Deserialize<System.Collections.Generic.Dictionary<string, string>>(
                                File.ReadAllText(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "baidu_ocr.json")));
                        string eng = jsv != null && jsv.ContainsKey("engine") ? jsv["engine"] : "baidu";
                        if (eng == "umi" && UmiOcrHost.IsInstalled) UmiOcrHost.EnsureRunning();
                    }
                }
                catch { }
            });
        }

        private readonly F1MessageFilter f1Filter = new F1MessageFilter();

        /// <summary>
        /// 把 F1/F2/F3 按键(0x70/0x71/0x72)转成 PdfBridge 事件。
        /// ★ 焦点在报价插件(Form3)树内时不触发——那条路径由 Form3.ProcessCmdKey
        ///   处理,此处再触发会双跑一次(F1 合并两遍:第一遍成功、第二遍弹
        ///   "请先选中至少2行"的误提示)。
        /// </summary>
        private class F1MessageFilter : IMessageFilter
        {
            public bool PreFilterMessage(ref Message m)
            {
                const int WM_KEYDOWN = 0x0100;
                bool isFKey = m.Msg == WM_KEYDOWN &&
                    ((int)m.WParam == 0x70 || (int)m.WParam == 0x71 || (int)m.WParam == 0x72);
                if (!isFKey) return false;

                // 焦点控件在 Form3 树内 → 交给 Form3.ProcessCmdKey,跳过
                try
                {
                    var focused = Control.FromHandle(m.HWnd);
                    for (var c = focused; c != null; c = c.Parent)
                    {
                        if (c is MyApp.Form3) return false;
                    }
                }
                catch { }

                int key = (int)m.WParam;
                try
                {
                    if (key == 0x70) PdfBridge.RaiseF1();
                    else if (key == 0x71) PdfBridge.RaiseF2();
                    else if (key == 0x72) PdfBridge.RaiseF3();
                }
                catch { }
                return false;
            }
        }
    }
}