using Cryville.Common;
using Cryville.Crtr.Components;
using System;
using System.Collections.Generic;
using System.Globalization;
using UnityEngine;

namespace Cryville.Crtr {
	public class EffectInstance : ISkinnableGroup, IComparable<EffectInstance> {
		readonly EffectDefinition _def;
		readonly SkinContainer _skinContainer;
		public Transform RootTransform { get; private set; }
		public EffectInstance(EffectDefinition def) {
			_def = def;
			_skinContainer = new SkinContainer(_def.elements);
			RootTransform = new GameObject("effect:" + GetHashCode().ToString(CultureInfo.InvariantCulture)).transform;
			SkinContext = new SkinContext(RootTransform);
			ChartPlayer.etor.ContextCascadeInsertBlock();
			_skinContainer.MatchStatic(this);
			ChartPlayer.etor.ContextCascadeDiscardBlock();
			foreach (var i in RootTransform.GetComponentsInChildren<SkinComponent>())
				i.Init();
			_indexSrc = new PropSrc.Float(() => Index);
			_durationOp = new PropOp.Float(v => _duration = v);
		}
		private float m_index;
		public float Index {
			get { return m_index; }
			set {
				if (m_index == value) return;
				m_index = value;
				_indexSrc.Invalidate();
			}
		}
		internal static readonly int _VAR_EFFECT_INDEX = IdentifierManager.SharedInstance.Request("effect_index");
		readonly PropSrc _indexSrc;
		double _startTime;
		float _duration;
		readonly PropOp _durationOp;
		public double EndTime { get { return _startTime + _duration; } }
		public void OnEmit(double time) {
			_startTime = time;
			RootTransform.gameObject.SetActive(true);
			ChartPlayer.etor.ContextCascadeInsert();
			ChartPlayer.etor.ContextCascadeUpdate(_VAR_EFFECT_INDEX, _indexSrc);
			ChartPlayer.etor.Evaluate(_durationOp, _def.duration);
			_skinContainer.MatchDynamic(this, 0);
			ChartPlayer.etor.ContextCascadeDiscard();
		}
		public void OnDone() {
			RootTransform.gameObject.SetActive(false);
		}
		public void Dispose() {
			GameObject.Destroy(RootTransform.gameObject);
		}

		public string TypeName { get { throw new InvalidOperationException("Type name undefined"); } }
		public SkinContext SkinContext { get; private set; }
		public Anchor OpenedAnchor { get { throw new InvalidOperationException("Anchor not supported"); } }
		public void PushAnchorEvent(double time, int name) {
			throw new InvalidOperationException("Anchor not supported");
		}
		public void RegisterAnchor(int name) {
			throw new InvalidOperationException("Anchor not supported");
		}
		public bool TryGetAnchorsByName(int name, out IReadOnlyCollection<Anchor> result) {
			throw new InvalidOperationException("Anchor not supported");
		}

		public int CompareTo(EffectInstance other) {
			int r = EndTime.CompareTo(other.EndTime);
			if (r != 0) return r;
			return GetHashCode().CompareTo(other.GetHashCode());
		}
	}
}