using System;
using System.Collections;
using System.Collections.Generic;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public partial class BackgroundSetter : GameElement
    {
        #region [暴露属性字段] Settings & Sprites
        public bool useSkybox;
        public string skyboxThemeBundleName;
        public string skyboxMaterialName;
        public Material skyboxMaterial;
        public string backgroundSpriteName;
        public Sprite backgroundSprite;
        #endregion

        #region [关联组件] Related References
        public SkyboxSubsetter skyboxSubsetter;
        #endregion
        
        #region [生命周期] Lifecycle & Factory
        public static BackgroundSetter GenerateElement(string elementName, Guid id, List<string> tags,
            bool isFirstGenerated, GameElement parentElement, bool useSkybox, string skyboxThemeBundleName,
            string skyboxMaterialName, string backgroundSpriteName)
        {
            BackgroundSetter backgroundSetter = Instantiate(GameManager.Instance.basePrefabs.emptyObject)
                .AddComponent<BackgroundSetter>();
            GameManager.Instance.backgroundSetter = backgroundSetter;
            backgroundSetter.Initialize(elementName, id, tags, isFirstGenerated, parentElement);
            backgroundSetter.useSkybox = useSkybox;
            backgroundSetter.skyboxThemeBundleName = skyboxThemeBundleName;
            backgroundSetter.skyboxMaterialName = skyboxMaterialName;
            backgroundSetter.backgroundSpriteName = backgroundSpriteName;
            return backgroundSetter;
        }
        
        public override void Refresh()
        {
            GameManager.Instance.backgroundController.EnableBackground(!useSkybox);
            if (useSkybox && skyboxSubsetter == null)
            {
                SetSkybox(skyboxThemeBundleName, skyboxMaterialName);
            }
            else
            {
                SetBackgroundSprite(backgroundSpriteName);
            }
        }
        #endregion
    }

    #region [私有业务方法] Private Utilities
    public partial class BackgroundSetter
    {
        private void SetSkybox(string themeBundleName, string materialName)
        {
            skyboxThemeBundleName = themeBundleName;
            skyboxMaterialName = materialName;
            skyboxMaterial = ThemeBundleManager.instance.GetObject<Material>(themeBundleName, materialName);
            if (skyboxMaterial == null) skyboxMaterial = GameManager.Instance.basePrefabs.defaultSkyboxMaterial;
            GameManager.Instance.backgroundController.SetSkybox(skyboxMaterial);
        }

        private void SetBackgroundSprite(string spriteName)
        {
            string path = GameManager.Instance.projectInformation.projectPath + "/Sprites/" + spriteName + ".png";
            backgroundSprite = ES3.FileExists(path) ? ES3.Load<Sprite>(path) : GameManager.Instance.basePrefabs.defaultBackground;
            GameManager.Instance.backgroundController.SetBackground(backgroundSprite);
        }
    }
    #endregion

}