using UnityEngine;

namespace Funique
{
    /// <summary>
    /// Camera following mode control <br />
    /// ------------------------------------------------ <br />
    /// 攝影機跟隨模式控制器
    /// </summary>
    [AddComponentMenu("Funique/Core/Follow Camera")]
    public class FollowCam : MonoBehaviour
    {
        // 變數
        #region Field
        [SerializeField] Transform headsetTransform;
        [SerializeField] bool UseDD;
        [SerializeField] DynamicDirection DD;
        [SerializeField] Vector3 DDOffset;
        [SerializeField] Vector3 DDMultiple;
        [SerializeField] public bool is3dh;
        public bool is4dof = false;
        float posZ;
        Vector3 headsetOffset;
        #endregion


        // Unity 事件
        #region Unity Event
        private void Update()
        {
            if (!is4dof)
            {
                if (UseDD)
                {
                    transform.position = new Vector3(headsetTransform.position.x, headsetTransform.position.y, 1);
                    transform.localRotation = Quaternion.LookRotation(DD.Dir, Vector3.up);
                    transform.localEulerAngles = new Vector3(
                        (transform.localEulerAngles.x + DDOffset.x) * DDMultiple.x,
                        (transform.localEulerAngles.y + DDOffset.y) * DDMultiple.y,
                        (transform.localEulerAngles.z + DDOffset.z) * DDMultiple.z);
                }
                else
                {
                    Follow();
                }
            }
            else
            {
                Follow();
            }
        }
        private void OnEnable()
        {
            posZ = transform.position.z;
        }
        private void OnDisable()
        {
            is3dh = false;
            transform.position = new Vector3(base.transform.position.x, base.transform.position.y, posZ);
            transform.localEulerAngles = new Vector3(0, 90, 0);
        }
        #endregion


        // 功能
        #region Utility
        public void On4dof()
        {
            transform.position = new Vector3(headsetTransform.position.x, headsetTransform.position.y, 1);
            transform.localEulerAngles = new Vector3(0, 90, 0);
        }
        void Follow()
        {
            transform.position = new Vector3(headsetTransform.position.x, headsetTransform.position.y, 1);
            transform.localEulerAngles = new Vector3(0, 90, 0);
        }
        #endregion
    }
}