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

public class CameraMovement : MonoBehaviour
{
    public Transform target;
    public Transform parent;

    public float distance = 5.0f;
    public float xSpeed = 120.0f;
    public float ySpeed = 120.0f;

    public float yMinLimit = -20f;
    public float yMaxLimit = 80f;

    public float distanceMin = .5f;
    public float distanceMax = 15f;

    public bool isSwitchingTarget;

    float x = 0.0f;
    float y = 0.0f;

    Vector3 position;

    // Use this for initialization
    void Start()
    {
        isSwitchingTarget = false;
        Vector3 angles = transform.eulerAngles;
        x = angles.y;
        y = angles.x;
    }

    private void Update()
    {
        if (Input.GetMouseButton(0))
        {
            ChangeTargets(2f);
        }
    }

    void LateUpdate()
    {
        if (target)
        {
            if (Input.GetMouseButton(1))
            {
                x += Input.GetAxis("Mouse X") * xSpeed * distance * 0.02f;
                y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
                y = ClampAngle(y, yMinLimit, yMaxLimit);
            }

            if (!isSwitchingTarget)
            {
                Quaternion rotation = Quaternion.Euler(y, x, 0);

                //distance = Mathf.Clamp(distance - Input.GetAxis("Mouse ScrollWheel") * 5, distanceMin, distanceMax);

                Vector3 negDistance = new Vector3(0.0f, 0.0f, -distance);
                position = rotation * negDistance + target.position;

                transform.rotation = rotation;
                transform.position = position;
            }
        }

    }

    public static float ClampAngle(float angle, float min, float max)
    {
        if (angle < -360F)
            angle += 360F;
        if (angle > 360F)
            angle -= 360F;
        return Mathf.Clamp(angle, min, max);
    }

    public void ChangeTargets(float time)
    {
        RaycastHit hit;
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        if (Physics.Raycast(ray, out hit))
        {
            Debug.Log(hit.collider.name);
            target = null;
            Vector3 newpos = hit.collider.transform.position;
            target = hit.collider.transform;
        }

    }
}