using System;
using System.Runtime.InteropServices;

namespace Demo
{
    internal class UnmanagedExports
    {
        [DllExport(ExportName = "isUnicode", CallingConvention = CallingConvention.Cdecl)]
        private static bool IsUnicode()
        {
            return true;
        }

        [DllExport(ExportName = "setInfo", CallingConvention = CallingConvention.Cdecl)]
        private static void SetInfo(NppData notepadPlusData)
        {
            PluginBase.NppData = notepadPlusData;
            PluginBase.CommandMenuInit();
        }

        [DllExport(ExportName = "getFuncsArray", CallingConvention = CallingConvention.Cdecl)]
        private static IntPtr GetFuncsArray(ref int nbF)
        {
            nbF = PluginBase.FuncItems.Items.Count;
            return PluginBase.FuncItems.NativePointer;
        }

        [DllExport(ExportName = "messageProc", CallingConvention = CallingConvention.Cdecl)]
        private static uint MessageProc(uint message, IntPtr wParam, IntPtr lParam)
        {
            return 1;
        }

        private static IntPtr _ptrPluginName = IntPtr.Zero;

        [DllExport(ExportName = "getName", CallingConvention = CallingConvention.Cdecl)]
        private static IntPtr GetName()
        {
            if (_ptrPluginName == IntPtr.Zero)
                _ptrPluginName = Marshal.StringToHGlobalUni(PluginBase.PluginName);
            return _ptrPluginName;
        }

        [DllExport(ExportName = "beNotified", CallingConvention = CallingConvention.Cdecl)]
        private static void BeNotified(IntPtr notifyCode)
        {
            var nc = (ScNotification)Marshal.PtrToStructure(notifyCode, typeof(ScNotification));
            if (nc.nmhdr.code == (uint)NppMsg.NPPN_TBMODIFICATION)
            {
                PluginBase.FuncItems.RefreshItems();
                PluginBase.SetToolBarIcon();
            }
            else if (nc.nmhdr.code == (uint)SciMsg.SCN_CHARADDED)
            {
                PluginBase.DoInsertHtmlCloseTag((char)nc.ch);
            }
            else if (nc.nmhdr.code == (uint)NppMsg.NPPN_SHUTDOWN)
            {
                PluginBase.PluginCleanUp();
                Marshal.FreeHGlobal(_ptrPluginName);
            }
        }
    }
}