using DevExpress.XtraEditors;
using Ips.Library.Basic;
using Ips.Library.DxpLib;
using Ips.Sps.Tools.SignalDdces;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Ips.Sps.Tools.FileConcats
{
    public partial class FileConcatMainCtrl : DevExpress.XtraEditors.XtraUserControl
    {
        public FileConcatMainCtrl()
        {
            InitializeComponent();

            gvMain.UseDefaultSettings(new GridViewDefaultSetting() { DefaultEmptyDisplayText = false, Editable = true, ShowRowNum = true });
        }

        string vmfile = Path.Combine(SpsConst.VmFolder, "fileconcat.json");

        FileConcatViewModel vm;

        private void FileConcatMainCtrl_Load(object sender, EventArgs e)
        {
            if (File.Exists(vmfile))
            {
                vm = JsonSerializer.Deserialize<FileConcatViewModel>(File.ReadAllText(vmfile));
            }
            else
            {
                vm = new FileConcatViewModel();
            }
            bsMain.DataSource = vm;
        }

        private void OutFileButtonEdit_ButtonClick(object sender, DevExpress.XtraEditors.Controls.ButtonPressedEventArgs e)
        {
            OutFileButtonEdit.EditValue = ToolDialog.SaveFile("", "选择输入文件");
        }

        private void InFileEdit_ButtonClick(object sender, DevExpress.XtraEditors.Controls.ButtonPressedEventArgs e)
        {
            gvMain.EditingValue = ToolDialog.OpenFile("", "选择输入文件");
        }


        private void btnConcat_Click(object sender, EventArgs e)
        {
            if (HasError()) return;

            string jsonText = JsonSerializer.Serialize(vm, new JsonSerializerOptions() { WriteIndented = true });
            File.WriteAllText(vmfile, jsonText);

            var notFoundFiles = vm.FileList.Where(m => !File.Exists(m.FileName)).Select(m => m.FileName).ToList();
            if (notFoundFiles.IsNotNullOrEmpty())
            {
                MsgHelper.ShowError($"{notFoundFiles.JoinAsString(";")}不存在！");
                return;
            }

            using var fsOut = new FileStream(vm.OutFile, FileMode.OpenOrCreate, FileAccess.Write);
            for (int i = 0; i < vm.FileList.Count; i++)
            {
                var item = vm.FileList[i];
                using var fsIn = new FileStream(item.FileName, FileMode.Open, FileAccess.Read);

                if (item.AddZeroPrev > 0)
                    fsOut.Seek(item.AddZeroPrev * 4, SeekOrigin.Current);

                fsIn.CopyTo(fsOut);

                if (item.AddZeroBack > 0)
                    fsOut.Seek(item.AddZeroBack * 4, SeekOrigin.Current);
            }
            fsOut.SetLength(fsOut.Position);

            bool openFolder = MsgHelper.ShowConfirm("文件拼接成功,是否打开目录?");
            if (openFolder)
            {
                Process.Start("explorer", Path.GetDirectoryName(vm.OutFile));
            }
        }

        private bool HasError()
        {
            if (vm.OutFile.IsNullOrWhitespace())
            {
                dxError.SetError(OutFileButtonEdit, "请选择输出文件");
            }
            if (vm.FileList.Where(m => m.FileName.IsNotNullOrWhitespace()).IsNullOrEmpty())
            {
                dxError.SetError(grdMain, "至少添加一个输入文件");
            }

            return dxError.HasErrors;
        }
    }
}