using UnityEngine;
using System.Collections;
using System;

[Serializable]
public class Plot2DChannel{
	public bool sample = true;
	public bool draw = true;
	public Color color = Color.green;
	public float cellTime = 0.2f;
	public float cellValue = 0.2f;
	public OscilloscopeSampler sampler;

    public bool oscilloscopeMode;


	private float[] sampleValueBuffer;

	public float[] SampleValueBuffer {
		get {
			return sampleValueBuffer;
		}
	}

	private float[] sampleTimeBuffer;

	public float[] SampleTimeBuffer {
		get {
			return sampleTimeBuffer;
		}
	}

	private int sampleBufferPosition;

	public int SampleBufferPosition {
		get {
			return sampleBufferPosition;
        }
	    set
	    {
            sampleBufferPosition = value;

        }
	}

    public void ResizeBuffers(int samplesCount)
    {
        sampleTimeBuffer = new float[samplesCount];
        sampleValueBuffer = new float[samplesCount];
    }

    public void SetSample(int id, float x, float y)
    {
        sampleTimeBuffer[id] = x;
        sampleValueBuffer[id] = y;
    }

	public void Reset(int cellCount, int sampleRate){
		float totalTime = cellCount * cellTime;
		int maxSampleCount = Mathf.CeilToInt (totalTime * sampleRate);
		sampleTimeBuffer = new float[maxSampleCount];
		sampleValueBuffer = new float[maxSampleCount];
	}

	public void Sample(){
        float val = sampler == null ? 0 : sampler();
        PushSample(Time.time, val);
	}

    public void PushSample(float x, float y) {
        sampleBufferPosition = (sampleBufferPosition + 1) % sampleValueBuffer.Length;
        sampleTimeBuffer[sampleBufferPosition] = x;
        sampleValueBuffer[sampleBufferPosition] = y;
    }
}

public delegate float OscilloscopeSampler();

[ExecuteInEditMode]
public class Plot2D : MonoBehaviour {
	public Vector2 pos = new Vector2(10,10);
	public Vector2 size;

	public Plot2DChannel[] channels;
	

	private Vector3[] screenCorners;
	private const float cellSize = 40.0f;
	private const int hCellCountHalf = 6;
	private const int vCellCountHalf = 4;
	public int sampleRate = 50;
	private float lastSampleTime;
	public bool showInEditor = true;
	
	public int xMatrixOffset = 0;
	public int yMatrixOffset = 0;
	private GUIStyle richLabelStyle;

	void Start () {
		size = new Vector2 (hCellCountHalf * 2 * cellSize, vCellCountHalf * 2 * cellSize);
		screenCorners = new []{
			new Vector3(pos.x, pos.y, 0.5f),
			new Vector3(pos.x + size.x, pos.y, 0.5f),
			new Vector3(pos.x + size.x, pos.y + size.y, 0.5f),
			new Vector3(pos.x, pos.y + size.y, 0.5f)
		};
	}
}