using GeoSigmaDrawLib;

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text.RegularExpressions;
using System.Windows.Forms;
using TreeView = System.Windows.Forms.TreeView;

namespace SmartWells
{
    public partial class FormLayers : Form
    {
        public List<string> SelectedNodes { get; set; }
        private string layerData;
        public FormLayers()
        {
            InitializeComponent();
        }
        public FormLayers(string layers):this()
        {
            layerData = layers;
        }
        private void FormLayers_Load(object sender, EventArgs e)
        {
            this.CreateTree();
            this.treeView1.ExpandAll();
        }
        private void CreateTree()
        {
            this.treeView1.BeginUpdate();

            try
            {
                string[] saFullLayers = Regex.Split(layerData, "\r\n");
                treeView1.Nodes.Clear();

                TreeNode tnRoot = new TreeNode("图层");
                tnRoot.Name = tnRoot.Text;
                treeView1.Nodes.Add(tnRoot);

                foreach (string strLine in saFullLayers)
                {
                    if (strLine.Length == 0)
                    {
                        continue;
                    }
                    string[] saLayers = Regex.Split(strLine, @"\\");
                    FillLayerTree(tnRoot, saLayers, 0, (LayerStatus)10);
                }
                tnRoot.EnsureVisible();
            }
            finally
            {
                treeView1.EndUpdate();
            }
        }
        /// <summary>
        /// The FillLayerTree.
        /// </summary>
        /// <param name="tnRoot">The tnRoot<see cref="TreeNode"/>.</param>
        /// <param name="saLayers">The saLayers.</param>
        /// <param name="startIndex">The startIndex<see cref="int"/>.</param>
        /// <param name="status">The status<see cref="LayerStatus"/>图层可见、可编辑状态</param>
        private void FillLayerTree(TreeNode tnRoot, string[] saLayers, int startIndex, LayerStatus status)
        {
            for (int i = startIndex; i < saLayers.Length; i++)
            {
                string strLayer = saLayers[i];
                if (strLayer.Equals("Layer:"))
                {
                    continue;
                }
                int nFind = tnRoot.Nodes.IndexOfKey(strLayer);
                if (nFind < 0)
                {
                    MakeFullNode(tnRoot, saLayers, i, status);
                    break;
                }
                else
                {
                    TreeNode tnFind = tnRoot.Nodes[nFind];
                    FillLayerTree(tnFind, saLayers, i + 1, status);
                    break;
                }
            }
        }
        /// <summary>
        /// 生成节点及其子节点.
        /// </summary>
        /// <param name="curNode">.</param>
        /// <param name="nodeNames">节点名称</param>
        /// <param name="startIndex">起始索引</param>
        /// <param name="status">The status<see cref="LayerStatus"/>.</param>
        private void MakeFullNode(TreeNode curNode, string[] nodeNames, int startIndex, LayerStatus status)
        {
            if (startIndex < nodeNames.Length)
            {
                TreeNode tnChild = new TreeNode(nodeNames[startIndex]);
                tnChild.Name = tnChild.Text;
                tnChild.ImageIndex = 0;
                curNode.Nodes.Insert(0, tnChild);
                if (startIndex == nodeNames.Length - 1)
                {
                    //SetNodeStatus(tnChild, status);
                }
                MakeFullNode(tnChild, nodeNames, startIndex + 1, status);
            }
        }
        private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
        {
            //只处理鼠标点击引起的状态变化
            if (e.Action == TreeViewAction.ByMouse)
            {
                e.Node.ForeColor = Color.Black;
                //更新子节点状态
                UpdateChildNodes(e.Node);
                //更新父节点状态
                UpdateParents(e.Node);
            }
        }
        private void UpdateChildNodes(TreeNode node)
        {
            foreach (TreeNode child in node.Nodes)
            {
                child.Checked = node.Checked;
                child.ForeColor = Color.Black;
                UpdateChildNodes(child);
            }
        }

        private void UpdateParents(TreeNode node)
        {
            var parent = node.Parent;
            while (parent != null)
            {
                //设置父节点状态
                SetNodeState(parent);
                parent = parent.Parent;
            }
        }
        private void SetNodeState(TreeNode parent)
        {
            if (parent.Nodes.IsAllChecked())
            {
                //子节点全选中
                parent.Checked = true;
                parent.ForeColor = Color.Black;
            }
            else if (parent.Nodes.IsAllUnChecked())
            {
                //子节点全未选中
                parent.Checked = false;
                parent.ForeColor = Color.Black;
                //还要判断子节点中是否有半选中状态
                foreach (TreeNode child in parent.Nodes)
                {
                    if (child.ForeColor == Color.Blue)
                    {
                        //用蓝色标记半选中状态
                        parent.ForeColor = Color.Blue;
                        break;
                    }
                }
            }
            else
            {
                //子节点有的选中有的未选中
                parent.Checked = false;
                parent.ForeColor = Color.Blue;
            }
        }

        private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
            if (e.Bounds.Location.X <= 0)
            {
                return;
            }

            var treeview = sender as TreeView;
            var brush = Brushes.Black;
            if (e.Node.ForeColor == Color.Blue)
            {
                var location = e.Node.Bounds.Location;
                location.Offset(-11, 2);
                var size = new Size(9, 9);
                brush = Brushes.Blue;
                e.Graphics.FillRectangle(brush, new Rectangle(location, size));
            }
            //绘制文本
            e.Graphics.DrawString(e.Node.Text, treeview.Font, brush, e.Bounds.Left, e.Bounds.Top);
        }

        private void treeView1_AfterExpand(object sender, TreeViewEventArgs e)
        {
            treeView1.Refresh();
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            SelectedNodes = new List<string>();
            // Print each node.
            foreach (TreeNode n in treeView1.Nodes)
            {
                TreeNode treeNode = n;
                //Using a queue to store and process each node in the TreeView
                Queue<TreeNode> staging = new Queue<TreeNode>();
                staging.Enqueue(treeNode);
                while (staging.Count > 0)
                {
                    treeNode = staging.Dequeue();
                    // Print the node.  
                    //MessageBox.Show(treeNode.Text);
                    if (treeNode.Checked)
                    {
                        SelectedNodes.Add(treeNode.FullPath.Replace("图层\\",""));
                    }
                    foreach (TreeNode node in treeNode.Nodes)
                    {
                        staging.Enqueue(node);
                    }
                }
            }
            this.DialogResult = DialogResult.OK;
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {

        }
    }
    static class TreeNodeCollectionExtern
    {
        public static bool IsAllChecked(this TreeNodeCollection treeNodeCollection)
        {
            foreach (TreeNode node in treeNodeCollection)
            {
                if (node.Checked == false)
                {
                    return false;
                }
            }
            return true;
        }

        public static bool IsAllUnChecked(this TreeNodeCollection treeNodeCollection)
        {
            foreach (TreeNode node in treeNodeCollection)
            {
                if (node.Checked == true)
                {
                    return false;
                }
            }
            return true;
        }
    }
}