using DaJiaoYan.Services;
using DaJiaoYan.Utils;
using DaJiaoYan.Variables;
using System;
using System.Drawing;
using System.IO;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DaJiaoYan
{
    public partial class FormMain : Form
    {
        private readonly NotifyIcon notifyIcon;
        private static readonly Icon icon = new Icon(Path.Combine(Const.APP_PATH, Const.ICON_FILE));

        public FormMain()
        {
            InitializeComponent();
            notifyIcon = new NotifyIcon
            {
                Icon = icon,
                Text = Const.APP_SHOW_NAME,
                Visible = true,
            };
            notifyIcon.Click += NotifyIcon_Click;
            ControlExts.MessageBoxShowForm = this;
            Scan.OwnerFormHandle = this.Handle;
            Task.Run(() =>
            {
                Init();
            });
            //Scan.OwnerFormHandle = this.Handle;
        }

        private void Init()
        {
            ControlExts.FormInvoke(this, () =>
            {
#if DEBUG
                Text = $"{Const.APP_FORM_NAME} （debug {Const.APP_DEBUG_BUILD_VERSION} {Const.HTTP_HOST}）";
#else
                Text = $"{Const.APP_FORM_NAME} （release {Const.APP_DEBUG_BUILD_VERSION}）";
#endif
                this.Icon = icon;
            });
#if !DEBUG
            CheckForUpdate();
#endif
            Scan.DelegateLoadDriver = ChangeScannerDriverLabel;
            Scan.DelegateChangeScannerName = ChangeScannerNameLabel;
            Scan.DelegateChangeScannerStatus = ChangeScannerStatusLabel;

            Variables.Vars.DelegateCounterChange = ChangeUploadedCount;
            Task.Factory.StartNew(() =>
            {
                Services.Instance.Run();
                Models.ScannerList scannerList = Scan.GetScannerList();
                Variables.Vars.Scanners = scannerList.Resources;
                Variables.Vars.ScannerSelected = scannerList.Selected;
                //Instance.Init();
                ShowFreeSpace();
            });
        }

        private void NotifyIcon_Click(object sender, EventArgs e)
        {
            ShowMainForm();
        }

        private void ShowMainForm()
        {
            if (WindowState == FormWindowState.Minimized || !ShowInTaskbar)
            {
                Show();
                Activate();
                WindowState = FormWindowState.Normal;
                TopMost = true;
                Task.Run(() =>
                {
                    Task.Delay(100);
                    ControlExts.FormInvoke(this, () =>
                    {
                        TopMost = false;
                    });
                });
            }
            else
            {
                WindowState = FormWindowState.Minimized;
                //ShowInTaskbar = false;
                Hide();
            }
        }

        private void ChangeLabel(Label label, string txt, Color color)
        {
            ControlExts.FormInvoke(this, () =>
            {
                label.Text = txt;
                label.ForeColor = color;
            });
        }

        private void ChangeLabel(Label label, string txt)
        {
            ChangeLabel(label, txt, Color.Black);
        }


        private void ChangeScannerDriverLabel(bool ok)
        {
            string txt = ok ? "载入成功" : "载入失败";
            Color color = ok ? Color.Green : Color.Red;
            ChangeLabel(labelScannerDriver, txt, color);
        }

        private void ChangeScannerNameLabel(string txt)
        {
            ChangeLabel(labelScannerName, txt);
        }

        private async void ChangeScannerStatusLabel(string txt, Color color)
        {
            ChangeLabel(labelScannerStatus, txt, color);
            await ShowFreeSpace();
        }

        private void ChangeScannerDirectory(string txt)
        {
            ChangeLabel(labelScannerDirectory, txt);
        }

        private Task ShowFreeSpace()
        {
            return Task.Run(() =>
            {
                string FreeSpace = FileExts.GetHardDiskFreeSpace(Const.TMP_PATH.Substring(0, 1), FileExts.FileSizeUnit.GB);
                Utils.FileExts.CheckDirectory(Const.TMP_PATH, true);
                ChangeScannerDirectory($"{Const.TMP_PATH}\n[ 可用空间：{FreeSpace} ]");
            });
        }

        private void CheckForUpdate()
        {
            Task.Run(async () =>
            {
                var info = await Api.GetUpdateInfo();
                if (info.Version > Const.APP_BUILD_VERSION)
                {
                    try
                    {
                        ProcessExts.RunUpdate();
                    }
                    catch
                    {
                        ShowMessageBox("启动升级程序失败！", Const.MSG_CAPTION_ERROR);
                    }

                    Close();
                }
            });
        }


        /// <summary>
        /// 显示消息提示框
        /// </summary>
        /// <param name="text"></param>
        /// <param name="caption"></param>
        /// <param name="buttons"></param>
        /// <param name="icon"></param>
        /// <param name="defaultButton"></param>
        /// <returns></returns>
        private DialogResult ShowMessageBox(string text, string caption = "提示", MessageBoxButtons buttons = MessageBoxButtons.OK, MessageBoxIcon icon = MessageBoxIcon.Information, MessageBoxDefaultButton defaultButton = MessageBoxDefaultButton.Button1)
        {
            return ControlExts.ShowMessageBox(text, caption, buttons, icon, defaultButton);
        }


        private void LabelScannerDirectory_DoubleClick(object sender, EventArgs e)
        {
            FileExts.OpenFileInExplore(Const.TMP_PATH, () =>
            {
                ShowMessageBox("打开文件夹失败！", Const.MSG_CAPTION_ERROR);
            });
        }

        private void ChangeUploadedCount(int count)
        {
            ChangeLabel(labelUploadedCount, count.ToString());
        }

        private void FormMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            void exitFunc()
            {
                notifyIcon.Visible = false;
                notifyIcon.Icon.Dispose();
                notifyIcon.Dispose();
            }

            if (Vars.AllTaskFinished())
            {
                exitFunc();
            }
            else
            {
                if (ShowMessageBox("正在上传图片，如果强制退出将导致上传的批次图片不完整！\n确定退出吗？", Const.MSG_CAPTION_WARN, MessageBoxButtons.OKCancel) == DialogResult.OK)
                {
                    exitFunc();
                }
                else
                {
                    e.Cancel = true;
                }
            }
        }

        private void FormMain_SizeChanged(object sender, EventArgs e)
        {
            ShowInTaskbar = Visible = WindowState != FormWindowState.Minimized;
        }
    }

}