using UnityEngine;
using System.Collections;
using System.Linq;
using System;

public class Plot2DVariableFunction : Plot2DFunction
{
    public GameObject target;
    public string variable;

	// Use this for initialization
	void Start ()
	{
	    ReadValue();

	}

    public override float f(float x)
    {
        return ReadValue();
    }

    float ReadValue()
    {
        if (target != null) {
            var pathBlocks = variable.Split('.');
            var c = target.GetComponent(pathBlocks[0]);

            if (c == null)
            {
                return 0;
            }
            //find target
            int depth = 1;
            object o = c;
            System.Reflection.FieldInfo field = null ;

            while (depth < pathBlocks.Length) {
                var t = o.GetType();
                field = t.GetField(pathBlocks[depth], System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic);
                if (field == null)
                {
                    return 0;
                }
                o = field.GetValue(o);
                depth++;
            }
            try
            {
                float val = Convert.ToSingle(o);
                return val;
            }
            catch
            {
                Debug.LogFormat("Failed to convert property {0} to float type!", field.Name);
            }

        }
        return 0;
    }
	
	// Update is called once per frame
	void Update () {
	
	}
}