using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class ObjectsRect : MonoBehaviour
{
    public List<RectTransform> rects;
    RectTransform thisRect;

    Text txtStatus;

    bool adjusting;

    public float space; float lastCheckpoint;
    // Start is called before the first frame update
    void Start()
    {
        for (int i = 0; i < transform.childCount; i++)
        {
            rects.Add(transform.GetChild(i).GetComponent<RectTransform>());
        }

        thisRect = GetComponent<RectTransform>();
        lastCheckpoint = thisRect.anchoredPosition.x;

        txtStatus = GameObject.Find("Status").GetComponent<Text>(); 
    }

    IEnumerator AdjustToCenter()
    {
        Vector2 laspos = thisRect.anchoredPosition;
        float distanceLast = 99;

        while (distanceLast > 15)
        {
            yield return new WaitForSecondsRealtime(.15f);

            distanceLast = Vector2.Distance(laspos, thisRect.anchoredPosition);

            laspos = thisRect.anchoredPosition;
        }

        float yFactor = thisRect.anchoredPosition.y;

        float speed = 1;

        adjusting = true;

        if (Vector2.Distance(thisRect.anchoredPosition, new Vector2(lastCheckpoint, yFactor)) > (space / 2))
        {
            if (thisRect.anchoredPosition.x > lastCheckpoint)
            {
                AdvanceObj(true);
            }
            else
            {
                AdvanceObj(false);
            }
        }

        yield return new WaitForEndOfFrame();

        while (adjusting && thisRect.anchoredPosition.x != lastCheckpoint)
        {
            Vector2 posNew = Vector2.MoveTowards(thisRect.anchoredPosition, new Vector2(lastCheckpoint, yFactor), speed);

            thisRect.anchoredPosition = posNew;

            if (speed < 9)
            {
                speed += (8 * Time.deltaTime);
            }
            else
            {
                speed = 9;
            }

            yield return new WaitForFixedUpdate();
        }

        adjusting = false;

        yield break;
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            adjusting = false;
        }

        if (Input.GetMouseButtonUp(0))
        {
            StartCoroutine(AdjustToCenter());
        }

        float positionNow = thisRect.anchoredPosition.x;

        if (!adjusting)
        {
            if (positionNow > (lastCheckpoint + space))
            {
                AdvanceObj(true);
            }
            else if (positionNow < (lastCheckpoint - space))
            {
                AdvanceObj(false);
            }
        }
    }

    void AdvanceObj(bool positive)
    {
        if (positive)
        {
            RectTransform lastRect = rects[rects.Count - 1];

            Vector2 poslastRect = lastRect.anchoredPosition;
            lastRect.anchoredPosition = new Vector2(poslastRect.x - (space * rects.Count), poslastRect.y);

            rects.RemoveAt(rects.Count - 1);
            rects.Insert(0, lastRect);

            lastCheckpoint += space;
        }
        else
        {
            RectTransform firstrect = rects[0];

            Vector2 poslastRect = firstrect.anchoredPosition;
            firstrect.anchoredPosition = new Vector2(poslastRect.x + (space * rects.Count), poslastRect.y);

            rects.RemoveAt(0);
            rects.Add(firstrect);

            lastCheckpoint -= space;
        }

        switch (rects[3].gameObject.name)
        {
            case "Conversation":
                txtStatus.text = "Conversation";
                break;
            case "Configs":
                txtStatus.text = "Settings";
                break;
            case "AppClass":
                txtStatus.text = "Go to class";
                break;
            case "EditZoe":
                txtStatus.text = "Customize";
                break;
            case "Gaming":
                txtStatus.text = "Games";
                break;
        }
    }
}