using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class SeekController : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
{
    public Transform cam;
    public AudioAnalyzer audioAnalyzer;
    public PrepController controller;
    public LineRenderer referenceLine;
    public float startX, endX;
    public float zoomingSpeed =0.001f;


    Vector2 pointerDownPos;
    Vector3 pointerDownCamPos;

    float pointerDownZoomingYMult;

    public void OnDrag(PointerEventData eventData)
    {
        Vector3 pointerDelta = eventData.position - pointerDownPos;
        Vector3 newCamPos = pointerDownCamPos + (new Vector3(pointerDelta.x,0) * 0.035f);
        if(newCamPos.x < startX){
            newCamPos = new Vector3(startX, newCamPos.y,-10);
        } 
        if(newCamPos.x > endX){
            newCamPos = new Vector3(endX, newCamPos.y,-10);
        }
        if(eventData.position.x > Screen.width / 2f){
            audioAnalyzer.SetZoomingYMult(pointerDownZoomingYMult + (pointerDelta.y * zoomingSpeed));
        }
        controller.OnSeekerDragged(newCamPos);
        cam.position = newCamPos;
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        pointerDownPos = eventData.position;
        pointerDownCamPos = cam.position;
        pointerDownZoomingYMult = audioAnalyzer.zoomingYMult;

        controller.OnSeekerDown();
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        pointerDownPos = Vector3.zero;
        controller.OnSeekerUp();
    }

    void Awake(){
        startX = referenceLine.GetPosition(0).x;
        endX = referenceLine.GetPosition(referenceLine.positionCount-1).x;
    }
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        startX = referenceLine.GetPosition(0).x;
        endX = referenceLine.GetPosition(referenceLine.positionCount-1).x;
    }
}