// ============================================================
//  文档区停靠窗口:PDF 扒图工作区
//  = 独立 pdfbt.exe 主窗口的完整布局原样搬入:
//    左 报价工具(PdfQuoteWindow,内嵌 Form3 报价三表)
//    中 PDF 查看器(PdfViewerWindow,pdfium+OCR 框选扒图)
//  内部用 Smart DockSurface 承载;F1/F2/F3 全局消息过滤器随窗口启停
//  (焦点在 Form3 树内时跳过,由 Form3.ProcessCmdKey 处理,防双跑);
//  Umi-OCR 预热与独立版一致(已装本体且引擎为 umi 时打开即静默拉起)。
// ============================================================
using System;
using System.IO;
using System.Windows.Forms;

namespace 成套报价软件
{
    /// <summary>PDF 扒图工作区(DockState.Document):报价三表 + PDF 查看器。</summary>
    public class Pdf扒图窗口 : WeifenLuo.WinFormsUI.Docking.DockContent
    {
        private readonly F1MessageFilter _f1Filter = new F1MessageFilter();
        private PdfQuoteWindow _quote;
        private PdfViewerWindow _viewer;

        /// <summary>内嵌的报价界面(主窗口功能区按钮跨窗口调用用;未创建为 null)。</summary>
        public MyAppPdf.Form3 报价表单
        {
            get { return _quote != null ? _quote.报价表单 : null; }
        }

        public Pdf扒图窗口()
        {
            Text = "PDF扒图";
            TabText = "PDF扒图";
            this.BackColor = System.Drawing.Color.White;

            // 与独立版 MainForm.CreateDockWindows_dockSurface1 相同的内部结构
            var dockSurface = new Smart.CustomComponents.DockSurface();
            dockSurface.Dock = DockStyle.Fill;
            Controls.Add(dockSurface);
            dockSurface.EnsureDefaultTheme();     // 必须:Show 前保证有效主题

            _quote = new PdfQuoteWindow();
            _quote.CloseButtonVisible = false;
            _quote.TabText = "报价工具";
            _quote.Text = "报价工具";
            _quote.Show(dockSurface, WeifenLuo.WinFormsUI.Docking.DockState.DockLeft);

            _viewer = new PdfViewerWindow();
            _viewer.CloseButtonVisible = false;
            _viewer.TabText = "PDF 查看器";
            _viewer.Text = "PDF 查看器";
            _viewer.Show(dockSurface, WeifenLuo.WinFormsUI.Docking.DockState.Document);

            // ★ 全局 F1/F2/F3 过滤器:焦点在任何 WinForms 控件上都触发元件合并
            Application.AddMessageFilter(_f1Filter);
            FormClosed += (s, e) =>
            {
                Application.RemoveMessageFilter(_f1Filter);
                // 显式关内部窗口:Form3 解绑桥事件、查看器停由本程序启动的 Umi-OCR
                try { if (_quote != null && !_quote.IsDisposed) _quote.Close(); } catch { }
                try { if (_viewer != null && !_viewer.IsDisposed) _viewer.Close(); } catch { }
            };

            // ★ Umi-OCR 预热(独立版 MainForm 同款):已装本体且当前引擎为 umi 时,
            //   打开本工作区就静默拉起(--hide 托盘),不等首次框选;后台线程跑不拖慢窗口
            System.Threading.ThreadPool.QueueUserWorkItem(_ =>
            {
                try
                {
                    string cfg = OcrPaths.ConfigPath;
                    if (File.Exists(cfg))
                    {
                        var jsv = new System.Web.Script.Serialization.JavaScriptSerializer()
                            .Deserialize<System.Collections.Generic.Dictionary<string, string>>(
                            File.ReadAllText(cfg));
                        string eng = jsv != null && jsv.ContainsKey("engine") ? jsv["engine"] : "baidu";
                        if (eng == "umi" && UmiOcrHost.IsInstalled) UmiOcrLauncher.EnsureRunning();
                    }
                }
                catch { }
            });
        }

        /// <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 MyAppPdf.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;
            }
        }
    }
}