/*******************************************************************************
 * 
 * Nx单视图类
 * 
 *      
 * 
 *          2021.12.10
 ******************************************************************************/

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

var NxView = cc.Class( {

	extends: NxObject,

	name: "NxView",

	// 初始化
	initialize: function( _args ) {

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

		this.vid = "";
		this.model = null;

		this.flag = "";
		this.props = {};

		return true;
	},

	// 销毁
	uninitialize: function() {

		this.vclear();

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

	// 标签设置
	vflag: function( flag ) {
		this.flag = flag;
	},

	// 重置
	reset: function( _model ) {

		_model = _model ? _model : this.model;
		if( !nx.dt.arrGood( _model ) ) {
			nx.error( "[单视图]重置失败,错误的模板!" );
			return false;
		}

		this.model = nx.dt.objClone( _model );

		for( let i = 0; i < this.model.length; ++i ) {

			var p = this.model[ i ];
			if( !nx.dt.objGood( p ) || nx.dt.strEmpty( p.key ) ) {
				nx.error( "[单视图]重置出错,模板中有错误的设定! 第%d个属性", i );
				continue;
			}

			this.vset( p.key, p.value, true, p.desc );
		}

		return true;
	},

	// 设置
	vset: function( key, value, notify, desc ) {

		if( nx.dt.strEmpty( key ) ) {
			nx.error( "[单视图]属性查询失败,无效的属性名!" );
			return false;
		}

		// nx.debug( "props:[" + this.flag + "] " + key + " -> " + value )

		// 更新
		var p = this.props[ key ];
		if( p != null ) {
			p.old = nx.dt.objClone( p.now );
			p.now = nx.dt.objClone( value );
		}
		else {
			this.props[ key ] = { now: nx.dt.objClone( value ), old: nx.dt.objClone( value ), binders: [], desc: desc };
		}

		// 通告
		if( notify != false ) {
			this._notify( this.props[ key ] );
		}

		return true;

	},

	// 广播一次
	vnotify: function( key ) {
		const p = this.props[ key ];
		if( p != null ) {
			this._notify( p );
		}
		else {
			nx.error( "[单视图]未定义的属性: " + key );
		}
	},

	// 获取
	vget: function( key, def ) {
		var p = this._query( key );
		return p ? nx.dt.objClone( p.now ) : def;
	},

	// 获取老值
	vgetOld: function( key, def ) {
		var p = this._query( key );
		return p ? nx.dt.objClone( p.old ) : def;
	},

	// 监听
	vbind: function( key, callback, tag ) {

		if( typeof ( tag ) != "string" || tag == "" ) {
			nx.error( "[单视图]监听失败,标记必须是有效字符串" );
			return false;
		}

		var p = this._query( key );
		if( p == null ||
			typeof ( callback ) != "function" ) {
			nx.error( "[单视图]属性监听失败,参数不匹配!" );
			return false;
		}

		for( var i = 0; i < p.binders.length; i++ ) {
			var cb = p.binders[ i ];
			if( cb == callback ) {
				nx.error( "[单视图]重复监听:" + key );
				return false;
			}
		}

		p.binders.push( { cb: callback, tag: tag } );

		nx.dt.trycatch( () => {
			callback( p.now, p.old, true );
		} );

		return true;

	},

	// 批量监听
	vbinds: function( tag, _lst ) {

		if( typeof ( tag ) != "string" || tag == "" ) {
			nx.error( "[单视图]批量监听失败,标记必须是有效字符串" );
			return false;
		}

		if( _lst.length == 0 ) {
			nx.error( "[单视图]批量监听失败,监听列表空!" + tag );
			return false;
		}

		for( var i in _lst ) {
			var binder = _lst[ i ];
			this.vbind( binder[ 0 ], binder[ 1 ], tag );
		}

		// nx.debug( "为[%s]增加监听[%d]个.", tag, _lst.length );
		return true;

	},

	// 监听解除
	vunbind: function( tag ) {

		if( typeof ( tag ) != "string" || tag == "" ) {
			nx.error( "[单视图]监听解除失败,标记必须是有效字符串" );
			return false;
		}

		var count = 0;
		for( var k in this.props ) {
			var p = this.props[ k ];
			for( var i = p.binders.length - 1; i >= 0; i-- ) {
				var binder = p.binders[ i ];
				if( binder && binder.tag == tag ) {
					p.binders.splice( i, 1 );
					count++;
				}
			}
		}

		// nx.debug( "为[%s]解除监听[%d]个.", tag, count );
		return true;

	},

	// 清理
	vclear: function() {
		this.props = {};
	},

	// 查询
	_query: function( _key ) {

		if( typeof ( _key ) != "string" || _key == "" ) {
			nx.error( "[单视图]属性查询失败,无效的属性名!" );
			return null;
		}

		var p = this.props[ _key ];
		if( typeof ( p ) == "undefined" ) {
			nx.error( "[单视图]属性查询失败,不存在属性:" + _key );
			return null;
		}

		return p;
	},

	// 通告
	_notify: function( _prop ) {

		nx.dt.trycatch( () => {
			for( var i in _prop.binders ) {
				var binder = _prop.binders[ i ];
				if( binder && typeof ( binder.cb ) == "function" ) {
					binder.cb( _prop.now, _prop.old, false );
				}
			}
		} );
	}

} );


module.exports = NxView;