using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Valve.VR;

public class CharacterUINavigation : MonoBehaviour
{
    public LayerMask layerMask;

    private LineRenderer line;
    private Vector3[] points = new Vector3[2];
    private readonly float defaultDistance = 10;

    private bool isPressingAButton = false;
    private bool isReleasingAButton = false;

    private ButtonInteraction lastBtn;
    private BasicProductUI lastProductUI;

    void Start()
    {
        line = GetComponent<LineRenderer>();
        points[0] = Vector3.zero;
        points[1] = transform.position + new Vector3(0, 0, defaultDistance);

        line.SetPositions(points);
    }

    void Update()
    {
        if (GameManager.Instance.GetIsUIMenuOpen())
        {
            line.enabled = true;
            if (SteamVR_Actions.default_GrabPinch.GetStateUp(SteamVR_Input_Sources.RightHand))
                isReleasingAButton = true;
            else if (SteamVR_Actions.default_GrabPinch.GetStateDown(SteamVR_Input_Sources.RightHand))
                isPressingAButton = true;

            AlignLineRenderer();
        }
        else
        {
            line.enabled = false;
        }

    }

    private void AlignLineRenderer()
    {
        Ray ray = new Ray(transform.position, transform.forward);

        RaycastHit hit;

        float zDistance = defaultDistance;
        if (Physics.Raycast(ray, out hit, layerMask))
        {
            GameObject go = hit.collider.gameObject;
            if (go.layer == 5) // UI
            {
                TriggerUI(go, isPressingAButton, isReleasingAButton);
                isPressingAButton = false;
                isReleasingAButton = false;
            }
            else if (go.layer == 11)
            {
                TriggerProductUI(go, isPressingAButton, isReleasingAButton);
                isPressingAButton = false;
                isReleasingAButton = false;
            }
              
            line.startColor = Color.red;
            line.endColor = Color.red;
            zDistance = hit.distance;
        }
        else
        {
            if(lastBtn != null)
            {
                lastBtn.NormalTrigger();
                lastBtn = null;
            }

            if(lastProductUI != null)
            {
                lastProductUI.NormalTrigger();
                lastProductUI = null;
            }

            line.startColor = Color.green;
            line.endColor = Color.green;
        }

        points[1] = new Vector3(0, 0, zDistance);
        line.SetPositions(points);

        line.material.color = line.startColor;
    }

    private void TriggerUI(GameObject go, bool isPressing = false, bool isReleasing = false)
    {
        lastBtn = go.GetComponent<ButtonInteraction>();
        if (lastBtn != null)
        {
            if (isPressing)
                lastBtn.PressTrigger();
            if (isReleasing)
                lastBtn.ClickTrigger();
            else
                lastBtn.HighlightTrigger();
        }
    }

    private void TriggerProductUI(GameObject go, bool isPressing = false, bool isReleasing = false)
    {
        lastProductUI = go.GetComponent<BasicProductUI>();
        StoreManager storeManager = GameObject.FindGameObjectWithTag("GameController").GetComponent<StoreManager>();

        if (lastProductUI != null)
        {
            if (isPressing)
                lastProductUI.PressTrigger();
            if (isReleasing)
            {
                if (storeManager.BuyProduct(lastProductUI.id))
                    lastProductUI.ClickTrigger();
            }
            else
                lastProductUI.HighlightTrigger();
        }
    }
}