using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using System.Diagnostics;

using HXX.Scanner.Common;

namespace HXX.Scanner.Starter
{
    public partial class frmStarter : Form
    {
        public frmStarter()
        {
            InitializeComponent();
        }

        bool haveHandle = false;


        private void Form1_Load(object sender, EventArgs e)
        {
            int frameX = (System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Size.Width - HXX.Scanner.Starter.Properties.Resources.检测中.Width) / 2;
            int frameY = (System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Size.Height - HXX.Scanner.Starter.Properties.Resources.检测中.Height) / 2;
            this.SetDesktopLocation(frameX, frameY);

            SetBits(global::HXX.Scanner.Starter.Properties.Resources.检测中);
            
            UpdateBiz();
        }

        private async void UpdateBiz()
        {
            try
            {
                var checkInfo = await biz.get_version_info();

                //test
                //checkInfo.Data.data.allowFlag = 1;
                //checkInfo.Data.data.force = 0;
                //checkInfo.Data.data.version = "1.9.50";
                //checkInfo.Data.data.description = @"1. 优化扫描识别 \r\n2. 修复bug \r\n3. abcdef \r\n4. aabbcc \r\n5. kknd";
                //test

                if (checkInfo != null && checkInfo.Data != null && checkInfo.Data.data != null && checkInfo.Status == 1)
                {
                    if (checkInfo.Data.data.allowFlag == 1)//强制开关，开关=1才允许进入升级流程
                    {
                        if (biz.check_new_version(checkInfo.Data.data))//版本对比
                        {
                            await Task.Run(() =>
                            {
                                this.Invoke(new Action(() =>
                                {
                                    this.Hide();

                                    frmCheckUpdate frm = new frmCheckUpdate(checkInfo.Data.data);
                                    frm.Show();
                                }));
                            });
                        }
                        else
                        {
                            await go_to_main();
                        }
                    }
                    else
                    {
                        await go_to_main();
                    }
                }
                else  //访问升级信息报错
                {                 
                    this.Hide();
                    MessageBox.Show(checkInfo.Message);

                    await go_to_main();
                }
            }
            catch (Exception ee)
            {                
                LogManager.WriteLog(ee);

                this.Hide();
                MessageBox.Show(ee.Message);

                await go_to_main();
            }
        }

        private async Task go_to_main()
        {
            await Task.Run(() =>
             {
                 this.Invoke(new Action(() =>
                 {
                     try
                     {
                         Process.Start("HXXScannerClient.exe");
                         Environment.Exit(0);
                     }
                     catch (Exception ee)
                     {
                         MessageBox.Show(ee.Message);
                         Environment.Exit(0);
                     }
                 }));
             });
        }

        private void InitializeStyles()
        {
            SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            SetStyle(ControlStyles.UserPaint, true);
            UpdateStyles();
        }
        protected override void OnClosing(CancelEventArgs e)
        {
            e.Cancel = true;
            base.OnClosing(e);
            haveHandle = false;
        }

        protected override void OnHandleCreated(EventArgs e)
        {
            InitializeStyles();
            base.OnHandleCreated(e);
            haveHandle = true;
        }
        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams cParms = base.CreateParams;
                cParms.ExStyle |= 0x00080000; // WS_EX_LAYERED
                return cParms;
            }
        }

        public void SetBits(Bitmap bitmap)
        {
            if (!haveHandle) return;

            if (!Bitmap.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat))
                throw new ApplicationException("The picture must be 32bit picture with alpha channel.");

            IntPtr oldBits = IntPtr.Zero;
            IntPtr screenDC = Win32.GetDC(IntPtr.Zero);
            IntPtr hBitmap = IntPtr.Zero;
            IntPtr memDc = Win32.CreateCompatibleDC(screenDC);

            try
            {
                Win32.Point topLoc = new Win32.Point(Left, Top);
                Win32.Size bitMapSize = new Win32.Size(bitmap.Width, bitmap.Height);
                Win32.BLENDFUNCTION blendFunc = new Win32.BLENDFUNCTION();
                Win32.Point srcLoc = new Win32.Point(0, 0);

                hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
                oldBits = Win32.SelectObject(memDc, hBitmap);

                blendFunc.BlendOp = Win32.AC_SRC_OVER;
                blendFunc.SourceConstantAlpha = 255;
                blendFunc.AlphaFormat = Win32.AC_SRC_ALPHA;
                blendFunc.BlendFlags = 0;

                Win32.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, 0, ref blendFunc, Win32.ULW_ALPHA);
            }
            finally
            {
                if (hBitmap != IntPtr.Zero)
                {
                    Win32.SelectObject(memDc, oldBits);
                    Win32.DeleteObject(hBitmap);
                }
                Win32.ReleaseDC(IntPtr.Zero, screenDC);
                Win32.DeleteDC(memDc);
            }
        }
    }
}