using UnityEngine;
using System.Collections;

namespace Snxxz.UI
{
    public class HUDBehaviour : MonoBehaviour
    {
        [Header("HUD Base")]
        [SerializeField]
        FacingCamera m_FacingCamera;
        public FacingCamera facingCamera {
            get {
                return this.m_FacingCamera;
            }
        }

        [SerializeField]
        Transform m_Target;
        public Transform target {
            get {
                return this.m_Target;
            }
            set {
                this.m_Target = value;
            }
        }

        [SerializeField]
        Vector3 m_Offset;
        public Vector3 offset {
            get { return m_Offset; }
            set { m_Offset = value; }
        }

        [SerializeField]
        bool m_IsLocal = false;
        public bool isLocal {
            get { return m_IsLocal; }
        }

        Camera m_Camera;
        new public Camera camera {
            get {
                return this.m_Camera;
            }
            set {
                this.m_Camera = value;
                if (this.m_Camera != null && this.facingCamera != null)
                {
                    this.facingCamera.camera = this.m_Camera;
                }
            }
        }

        Vector2 prePosition = new Vector2(-10000, 0);

        protected virtual void OnEnable()
        {
            SyncPosition(false);
        }

        protected virtual void LateUpdate()
        {
            SyncPosition(false);
        }

        public void SyncPosition(bool _force)
        {
            if (target == null || camera == null)
            {
                return;
            }

            if (isLocal)
            {
                var uiposition = CameraUtility.ConvertToUIPosition(camera, target.position + offset);
                if (_force || Vector3.Distance(this.prePosition, uiposition) > 0.0001f)
                {
                    prePosition = this.transform.position = uiposition;
                    this.transform.localPosition = this.transform.localPosition.SetZ(0);
                }
            }
            else
            {
                if (_force || Vector3.Distance(this.prePosition, target.position + offset) > 0.001f)
                {
                    prePosition = this.transform.position = target.position + offset;
                }
            }
        }

    }
}