using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class PrepMover : MonoBehaviour
{
    public AudioSource source;
    public List<float> allHits = new List<float>();
    public List<float> hitsQueue = new List<float>();
    public List<Vector3> targetPoints = new List<Vector3>();
    public Vector2 speeds = new Vector2();

    public DrawShape botShape;
    public DrawShape topShape;
    void Start(){
        if(PrepConnector.saveLoadData != null){
            allHits = new List<float>
            {
                0
            };
            allHits.AddRange(PrepConnector.saveLoadData.hits);
            hitsQueue = new List<float>();
            hitsQueue.AddRange(allHits);
        }else{
            SceneManager.LoadScene("prep");
        }

        ReadFuture();
    }


    void ReadFuture(){
        targetPoints = new List<Vector3>();
        List<Vector3> botPoints = new List<Vector3>();
        List<Vector3> topPoints = new List<Vector3>();

        for(int i=0; i < allHits.Count; i++){
            float curT = allHits[i];
            float curY = GetYPoint(i);
            Vector3 thisPoint = new Vector3(curT * speeds.x, curY * speeds.y);
            targetPoints.Add(thisPoint);

            bool flipside= i %2 == 0;

            if(flipside){
                if (i > 2)
                {
                    Vector3 prevPoint = targetPoints[i - 2];
                    float xMid = prevPoint.x + ((thisPoint.x - prevPoint.x) / (2f * 2));
                    float yMid = prevPoint.y + ((thisPoint.y - prevPoint.y) / 2f);
                    xMid = targetPoints[i - 1].x; ;
                    Vector3 newP1 = new Vector3(xMid, prevPoint.y);
                    Vector3 newP2 = new Vector3(xMid, thisPoint.y);
                    botPoints.Add(newP1);
                    botPoints.Add(newP2);
                }
                botPoints.Add(thisPoint);        
            }else{
                
                topPoints.Add(thisPoint);
            }
        }

        botShape.Draw(botPoints, new Vector3(0,-30));
        topShape.Draw(topPoints, new Vector3(0,30));
    }

    public int curIndex =0;
    public float curProg = 0;
    void Update()
    {
        for(int i=0; i < allHits.Count; i++){
            if(allHits[i] < source.time){
                curIndex = i;
            }else{
                break;
            }
        }

        float curTime = allHits[curIndex];
        float nextTime = allHits[curIndex+1];

        curProg = (source.time - curTime) / (nextTime-curTime);

        transform.position = Vector3.Lerp(targetPoints[curIndex], targetPoints[curIndex+1], curProg);
    }

    float GetYPoint(int index){
        float y = 0;
        for(int i=0; i < index; i++){
            float prevValue = i >0 ? allHits[i-1] : 0;
            float curValue = allHits[i];

            float diff = curValue - prevValue;
            y += diff * (i %2 == 0 ? 1 : -1);
        }

        return y;
    }
}

/*

Dry run;

times = (0, 1,  2, 2.5,    5, 10)
y =     (0, 1, -1, 1.5, -3.5, 6.5)
addition(0, 1, )
*/