using UnityEngine;
using UnityEditor;

namespace Cinemachine.Editor
{
    [CustomEditor(typeof(Cinemachine3rdPersonFollow))]
    [CanEditMultipleObjects]
    internal class Cinemachine3rdPersonFollowEditor : BaseEditor<Cinemachine3rdPersonFollow>
    {
        [DrawGizmo(GizmoType.Active | GizmoType.Selected, typeof(Cinemachine3rdPersonFollow))]
        static void Draw3rdPersonGizmos(Cinemachine3rdPersonFollow target, GizmoType selectionType)
        {
            if (target.IsValid)
            {
                var isLive = CinemachineCore.Instance.IsLive(target.VirtualCamera);
                Color originalGizmoColour = Gizmos.color;
                Gizmos.color = isLive
                    ? CinemachineSettings.CinemachineCoreSettings.ActiveGizmoColour
                    : CinemachineSettings.CinemachineCoreSettings.InactiveGizmoColour;

                target.GetRigPositions(out Vector3 root, out Vector3 shoulder, out Vector3 hand);
                Gizmos.DrawLine(root, shoulder);
                Gizmos.DrawLine(shoulder, hand);
                Gizmos.DrawSphere(root, 0.02f);
                Gizmos.DrawSphere(shoulder, 0.02f);
#if CINEMACHINE_PHYSICS
                Gizmos.DrawSphere(hand, target.CameraRadius);

                if (isLive)
                    Gizmos.color = CinemachineSettings.CinemachineCoreSettings.BoundaryObjectGizmoColour;

                Gizmos.DrawSphere(target.VirtualCamera.State.RawPosition, target.CameraRadius);
#endif

                Gizmos.color = originalGizmoColour;
            }
        }
        
        public override void OnInspectorGUI()
        {
            BeginInspector();
            bool needWarning = false;
            for (int i = 0; !needWarning && i < targets.Length; ++i)
                needWarning = (targets[i] as Cinemachine3rdPersonFollow).FollowTarget == null;
            if (needWarning)
                EditorGUILayout.HelpBox(
                    "3rd Person Follow requires a Follow Target.  Change Body to Do Nothing if you don't want a Follow target.",
                    MessageType.Warning);
            DrawRemainingPropertiesInInspector();
        }
    }
}