/*******************************************************************************
 *
 * Nx 资源缓存
 *
 *
 *
 *          2021.12.10
 ******************************************************************************/

const NxObject = require( "nx.object" );

// 常驻目录:基础
const ResidentBase = [
	"coms"
];

// 常驻目录:图片
const ResidentImages = [
	"resDB/icons",
];

// 常驻目录:动画
const ResidentSpines = [
];

// 常驻目录:预制体
const ResidentPrefabs = [
	"prefab/bag",
	"prefab/battle",
	"prefab/chat",
	"prefab/home",
	"prefab/mainui",
	"prefab/partner",
	"prefab/popup",
	"prefab/push",
	"prefab/shop",
	"prefab/summon",
	"prefab/task",
];

const NxAssets = cc.Class( {

	extends: NxObject,

	name: "NxAssets",

	// 初始化
	initialize: function( _args ) {

		// USPER
		if( !this._super( _args ) ) {
			return false;
		}

		// 全局服务开启
		nx.assets = this;

		// 资产缓存表
		this.caches = {};

		// 常驻资产表
		this.residents = {};

		return true;
	},

	// 销毁
	uninitialize: function() {

		// 全局服务关闭
		nx.assets = null;

		// USPER
		return this._super();
	},

	/**************************************************************
	 * 资产管理
	 /*************************************************************/

	// 资产查询
	queryAsset: function( _uid ) {
		return this.caches[ _uid ];
	},

	// 资产缓存
	cacheAsset: function( _asset, _skey ) {

		// 无效资产
		if( !( _asset instanceof cc.Asset ) ) {
			return;
		}

		// 资产ID无效
		let uid = _skey || _asset._uuid;
		if( nx.dt.strEmpty( uid ) ) {
			nx.error( "[资产]缓存失败,资产ID无效!" );
			return;
		}

		// 缓存+1
		_asset.addRef();
		this.caches[ uid ] = _asset;
		//nx.debug( "[资产]缓存资产[REF:%d]:{%s}", _asset.refCount, uid );

		// 压入常驻
		this.pushResident( _skey, _asset );
	},

	// 资产释放
	uncacheAsset: function( _assetOrUid ) {

		// UUID
		if( nx.dt.strNEmpty( _assetOrUid ) ) {

			let key = _assetOrUid;
			let asset = this.caches[ key ];
			if( !asset ) {
				for( let k in this.caches ) {
					if( this.caches[ k ]._uuid == key ) {
						asset = this.caches[ k ];
						key = k;
						break;
					}
				}
				return;
			}

			// 释放-1
			asset.decRef();
			//nx.debug( "[资产]资产释放[REF:%d]:{%s}", asset.refCount, key );
			if( asset.refCount == 0 ) {
				delete this.caches[ key ];
				delete this.residents[ key ];
			}

			return;
		}

		// 资产
		if( _assetOrUid instanceof cc.Asset ) {

			// 资产ID无效
			let key = _assetOrUid._uuid;
			for( let k in this.caches ) {
				if( this.caches[ k ]._uuid == key ) {
					key = k;
					break;
				}
			}

			if( nx.dt.strEmpty( key ) ) {
				nx.error( "[资产]释放失败,资产ID无效!" );
				return;
			}

			// 释放-1
			_assetOrUid.decRef();
			if( _assetOrUid.refCount == 0 ) {
				delete this.caches[ key ];
				delete this.residents[ key ];
			}
			//nx.debug( "[资产]释放资产[REF:%d]:{%s}", _assetOrUid.refCount, key );
		}

	},

	// 资源全释放
	uncacheAssets: function( _resident = false ) {

		// 常驻清理
		if( _resident ) {
			this.clearResidents();
		}

		// 其余清理
		for( let key in this.caches ) {

			let asset = this.caches[ key ];
			if( !asset ) {
				continue;
			}

			asset.decRef();
			if( asset.refCount > 0 ) {
				nx.warn( "[资产]释放未完全[REF:%d]:{%s}", asset.refCount, key )
			}

		}

		this.caches = {};
	},

	/**************************************************************
	 * 常驻资产管理
	 /*************************************************************/

	// 获取常驻
	queryResident: function( _skey ) {
		let res = this.residents[ _skey ];
		return res;
	},

	// 是否可常驻
	canResident: function( _skey, _asset ) {

		// 通用目录
		for( let i in ResidentBase ) {
			if( _skey.indexOf( ResidentBase[ i ] ) >= 0 ) {
				return true;
			}
		}
		
		// 类型目录
		let list = null;
		if( _asset instanceof cc.SpriteFrame ) {
			list = ResidentImages;
		} else if( _asset instanceof sp.SkeletonData ) {
			list = ResidentSpines;
		} else if( _asset instanceof cc.Prefab ) {
			list = ResidentPrefabs;
		} 

		for( let i in list ) {
			if( _skey.indexOf( list[ i ] ) >= 0 ) {
				return true;
			}
		}

		return false;
	},

	// 压入常驻
	pushResident: function( _skey, _asset ) {

		// 已经存在
		let old = this.queryResident( _skey );
		if( old ) {
			return true;
		}

		// 无效
		if( nx.dt.strEmpty( _skey ) || !_asset ) {
			return false;
		}

		// 加入常驻表
		let good = this.canResident( _skey, _asset );
		if( good ) {
			_asset.addRef();
			this.residents[ _skey ] = _asset;
		}
		return good;
	},

	// 常驻清理
	clearResidents: function() {

		for( let key in this.residents ) {
			let res = this.residents[ key ];
			if( res ) {
				res.decRef();
			}
		}
		this.residents = {};
	},

	/**************************************************************
	 * 资产调试
	 /*************************************************************/

	// 缓存打印
	dumpAssets: function() {

		//nx.debug( "[资产]当前缓存资产:" )
		for( let uuid in this.caches ) {
			let asset = this.caches[ uuid ];
			if( asset ) {
				//nx.debug( "\t\t[REF:%d]:%s", asset.refCount, uuid );
			}
		}
	},

} );

// 模块导出
module.exports = NxAssets;