using UnityEngine;
using System.Xml;
using System.Collections;
using System.Collections.Generic;

public class WebLoader : MonoBehaviour
{
    private string url = "http://elec0.comeze.com/XML/Unity/elec0.comeze.com.xml";
    private XmlDocument xmldoc = new XmlDocument();

    private List<string> toplayerLinks = new List<string>();
    private List<XmlNode> links = new List<XmlNode>();
    private List<string> linksNames = new List<string>();

    private WWW WebStart()
    {
        WWW www = new WWW(url);
        return www;
        //renderer.material.mainTexture = www.texture;
    }

    void Start()
    {
        loadWWW();
        getTopLevelLinks();

        foreach(string curS in toplayerLinks)
        {
            XmlNode curNode = findName(curS, xmldoc);
            if(curNode != null)
            {
                links.Add(curNode);
                linksNames.Add(curS);
            }
        }

        /* At this point the names and nodes are indexed and stored. Now the selection has to begin.
         * When a domino is selected, it has to grab it's name and XmlNode and action from in here, then the action can be executed
         * That itself will take another reading of the XML, I think. I'm not sure about that, though, since all the navdatas are read and stored
         *  in this pass.
        */

        // Draw the firstlayer dominos
        drawDomino();
    }

    void drawDomino()
    {
        drawPlane(transform.TransformPoint(new Vector3(0, 0, 0)), transform.TransformPoint(new Vector3(1, 1, 0)), Color.magenta);
    }

    void drawPlane(Vector3 position, Vector3 cornerPos, Color color)
    {
        gameObject.AddComponent("MeshFilter");
        gameObject.AddComponent("MeshRenderer");
        Mesh mesh = GetComponent<MeshFilter>().mesh;

        mesh.Clear();
        //position = new Vector3(-size/2, 0, -size/2);

        mesh.vertices = new Vector3[]
        {
            new Vector3(position.x, position.y, position.z),
            new Vector3(position.x, position.y+cornerPos.y, position.z+position.z),
            new Vector3(position.x+cornerPos.x, position.y+cornerPos.y, position.z+cornerPos.z),
            new Vector3(position.x+cornerPos.x, position.y, position.z+cornerPos.z)
        };

        mesh.uv = new Vector2[] {new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, 1), new Vector2(1, 1)};

        mesh.triangles = new int[] {0, 1, 2, 0, 2, 3};

        mesh.RecalculateNormals();

        MeshFilter mf = (MeshFilter)gameObject.GetComponent(typeof(MeshFilter));
        MeshRenderer mr = (MeshRenderer)gameObject.GetComponent(typeof(MeshRenderer));

        mf.mesh = mesh;

        mr.renderer.material.color = color;
    }

    // TODO: Better name for this method
    private XmlNode findName(string nameToFind, XmlDocument findXmlDoc)
    {
        XmlNodeList nodeList = findXmlDoc.GetElementsByTagName("navdata");

        // Loop over each node in the nodelist, then loop over each node in the childnodes of that node
        for(int i = 0; i < nodeList.Count; ++i)
        {
            XmlNodeList curNodeList = nodeList.Item (i).ChildNodes;
            foreach(XmlNode curNode in curNodeList)
            {
                if(curNode.InnerText.Equals(nameToFind))
                    return curNode;
            }
        }

        return null;
    }

    private void getTopLevelLinks()
    {
        // Grab firstlayer's childnodes, there should always only be one firstlayer tag
        XmlNodeList nodeList = xmldoc.GetElementsByTagName("firstlayer").Item (0).ChildNodes;

        foreach(XmlNode x in nodeList)
        {
            toplayerLinks.Add(x.InnerText);
        }
    }

    private void loadWWW()
    {
        WWW www = WebStart();

        while(www.isDone == false) // This should work because I think the www does loading asyc. If not, it doesn't matter
        { }
        xmldoc.LoadXml(www.text);
    }
}