#region

using System;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;
using CSFrameworkV5.Common;
using CSFrameworkV5.Core;
using CSFrameworkV5.Interfaces;

///*************************************************************************/
///*
///* 文件名    ：ucAttachment.cs                              
///* 程序说明  : 附件管理自定义控件
///*               这个控件只是个载体, 具体业务由实现IAttachmentStorage接口的类完成. 
///* 原创作者  ：www.csframework.com 
///* 
///* Copyright 2006-2021 C/S框架网 www.csframework.com
///*
///**************************************************************************/

#endregion

namespace CSFrameworkV5.Library.UserControls
{
    /// <summary>
    ///     提交附件资料的事件
    /// </summary>
    /// <param name="data">附件资料</param>
    public delegate void PostAttachmentData(object data);

    /// <summary>
    ///     附件管理自定义控件.
    /// </summary>
    public partial class ucAttachment : UserControl
    {
        //是否立即提交数据
        private bool _ImmediatelyPost;

        private PostAttachmentData _OnPostAttachmentData;

        //附件管理存储策略
        private IAttachmentStorage _Storage;

        public ucAttachment()
        {
            InitializeComponent();
        }

        /// <summary>
        ///     即时提交数据
        /// </summary>
        [DefaultValue(false)]
        [Description("即时提交数据")]
        public bool ImmediatelyPost
        {
            get => _ImmediatelyPost;
            set => _ImmediatelyPost = value;
        }

        /// <summary>
        ///     附件管理策略
        /// </summary>
        public IAttachmentStorage StorateStrategy
        {
            get => _Storage;
            set => _Storage = value;
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            var dlg = new OpenFileDialog();
            if (DialogResult.OK == dlg.ShowDialog())
            {
                //检查文件名是否存在
                if (_Storage.Exists(Path.GetFileName(dlg.FileName)))
                {
                    Msg.Warning("附件已经存在！");
                }
                else
                {
                    _Storage.AddFile(dlg.FileName);
                    if (_ImmediatelyPost && _OnPostAttachmentData != null)
                        _OnPostAttachmentData(_Storage.AttachmentStorage);
                }
            }
        }

        private void btnDel_Click(object sender, EventArgs e)
        {
            if (gvSummary.IsValidRowHandle(gvSummary.FocusedRowHandle))
            {
                if (Msg.AskQuestion("确定要删除此附件吗?"))
                {
                    var fileName =
                        gvSummary.GetDataRow(gvSummary.FocusedRowHandle)[
                            "FileName"].ToStringEx();
                    _Storage.DeleteFile(fileName);
                    if (_ImmediatelyPost && _OnPostAttachmentData != null)
                        _OnPostAttachmentData(_Storage.AttachmentStorage);
                }
            }
            else
            {
                Msg.Warning("请选择一个附件！");
            }
        }

        private void btnSaveAs_Click(object sender, EventArgs e)
        {
            if (gvSummary.IsValidRowHandle(gvSummary.FocusedRowHandle))
            {
                var fileName =
                    gvSummary.GetDataRow(gvSummary.FocusedRowHandle)["FileName"]
                        .ToStringEx();
                _Storage.SaveAs(fileName);
            }
            else
            {
                Msg.Warning("请选择一个附件！");
            }
        }

        /// <summary>
        ///     绑定表格控件的数据源
        /// </summary>
        public void DoBindDataSource()
        {
            if (_Storage != null)
            {
                gcSummary.DataSource = null;
                gcSummary.DataSource = _Storage.AttachmentStorage;
            }
        }

        /// <summary>
        ///     取消修改
        /// </summary>
        public void DoRejectChanges()
        {
            _Storage.AttachmentStorage.RejectChanges();
            DoBindDataSource();
        }

        /// <summary>
        ///     设置按钮状态
        /// </summary>
        /// <param name="currentState">按钮状态</param>
        public void DoSetButtonState(UpdateType currentState)
        {
            var onEditMode = currentState == UpdateType.Modify ||
                             currentState == UpdateType.Add;
            btnAdd.Enabled = onEditMode;
            btnDel.Enabled = onEditMode;
            gvSummary.OptionsBehavior.Editable = onEditMode;
            menuDrop.Enabled = onEditMode; //删除

            //不受状态控制
            btnSaveAs.Enabled = true; //另存为
            menuOpen.Enabled = true;
            menuSaveAs.Enabled = true;
        }

        private void menuOpen_Click(object sender, EventArgs e)
        {
            if (gvSummary.IsValidRowHandle(gvSummary.FocusedRowHandle))
            {
                var fileName =
                    gvSummary.GetDataRow(gvSummary.FocusedRowHandle)["FileName"]
                        .ToStringEx();
                _Storage.OpenFile(fileName);
            }
            else
            {
                Msg.Warning("请选择一个附件！");
            }
        }

        /// <summary>
        ///     保存附件数据
        /// </summary>
        [Description("保存附件数据")]
        public event PostAttachmentData OnPostAttachmentData
        {
            add => _OnPostAttachmentData += value;
            remove => _OnPostAttachmentData -= value;
        }

        private void ucAttachment_Load(object sender, EventArgs e)
        {
            //
        }

        private void ucAttachment_SizeChanged(object sender, EventArgs e)
        {
            colFileTitle.Width = Width - colIconSmall.Width - 15;
        }
    }
}