using System;
using UnityEngine;

namespace Assets.ThoMagic.Renderer
{
    [DisallowMultipleComponent]
    [ExecuteAlways]
    public class ThoMagicRendererCameraSettings : MonoBehaviour, IInstanceRenderSettings
    {
        [SerializeField]
        private bool _supported;
        [SerializeField]
        private bool _overrideSupported;
        [SerializeField]
        private bool _render;
        [SerializeField]
        private bool _overrideRendering;
        [Min(0.0f)]
        [SerializeField]
        private float _renderDistance;
        [SerializeField]
        private bool _overrideRenderDistance;
        [SerializeField]
        private bool _renderShadows;
        [SerializeField]
        private bool _overrideRenderShadows;
        [Min(0.0f)]
        [SerializeField]
        private float _shadowDistance;
        [SerializeField]
        private bool _overrideShadowDistance;
        [Range(0.01f, 1f)]
        [SerializeField]
        private float _densityInDistance;
        [SerializeField]
        private bool _overrideDensityInDistance;
        [SerializeField]
        private Vector2 _densityInDistanceFalloff;
        [SerializeField]
        private bool _overrideDensityInDistanceFalloff;
        private ReflectionProbe _reflectionProbe;

        public InstanceRenderSettings Settings => new InstanceRenderSettings()
        {
            Supported = !_overrideSupported || _supported,
            Render = !_overrideRendering || _render,
            RenderDistance = _overrideRenderDistance ? _renderDistance : -1f,
            ShadowDistance = _overrideShadowDistance ? _shadowDistance : -1f,
            Shadows = !_overrideRenderShadows || _renderShadows,
            DensityInDistance = _overrideDensityInDistance ? _densityInDistance : 1f,
            DensityInDistanceFalloff = _overrideDensityInDistanceFalloff ? _densityInDistanceFalloff : Vector2.zero
        };

        public bool? Supported
        {
            get => !_overrideSupported ? new bool?() : new bool?(_supported);
            set
            {
                _overrideSupported = value.HasValue;
                if (!value.HasValue)
                    return;
                _supported = value.Value;
            }
        }

        public bool? Render
        {
            get => !_overrideRendering ? new bool?() : new bool?(_render);
            set
            {
                _overrideRendering = value.HasValue;
                if (!value.HasValue)
                    return;
                _render = value.Value;
            }
        }

        public float? RenderDistance
        {
            get => !_overrideRenderDistance ? new float?() : new float?(_renderDistance);
            set
            {
                _overrideRenderDistance = value.HasValue;
                if (!value.HasValue)
                    return;
                _renderDistance = value.Value;
            }
        }

        public bool? RenderShadows
        {
            get => !_overrideRenderShadows ? new bool?() : new bool?(_renderShadows);
            set
            {
                _overrideRenderShadows = value.HasValue;
                if (!value.HasValue)
                    return;
                _renderShadows = value.Value;
            }
        }

        public float? ShadowDistance
        {
            get => !_overrideShadowDistance ? new float?() : new float?(_shadowDistance);
            set
            {
                _overrideShadowDistance = value.HasValue;
                if (!value.HasValue)
                    return;
                _shadowDistance = value.Value;
            }
        }

        public float? DensityInDistance
        {
            get => !_overrideDensityInDistance ? new float?() : new float?(_densityInDistance);
            set
            {
                _overrideDensityInDistance = value.HasValue;
                if (!value.HasValue)
                    return;
                _densityInDistance = value.Value;
            }
        }

        public Vector2? DensityInDistanceFalloff
        {
            get => !_overrideDensityInDistanceFalloff ? new Vector2?() : new Vector2?(_densityInDistanceFalloff);
            set
            {
                _overrideDensityInDistanceFalloff = value.HasValue;
                if (!value.HasValue)
                    return;
                _densityInDistanceFalloff = value.Value;
            }
        }

        private void OnEnable()
        {
            _reflectionProbe = GetComponent<ReflectionProbe>();
            if (_reflectionProbe == null)
                return;
            CameraRenderer.ReflectionProbeSettings = this;
        }

        private void OnDisable()
        {
            if (_reflectionProbe == null || CameraRenderer.ReflectionProbeSettings as ThoMagicRendererCameraSettings == this)
                return;

            CameraRenderer.ReflectionProbeSettings = null;
        }

        private void OnValidate()
        {
            if (_reflectionProbe == null || !Application.isEditor)
                return;
            _reflectionProbe.RenderProbe();
        }
    }
}