export default class PopupController{

	/* (1) Construct default attributes
	*
	---------------------------------------------------------*/
	constructor(){

		/* (1) Global
		---------------------------------------------------------*/
		/* (1) Background Visibility */
		this.filter = false;

		/* (2) Popup set */
		this.list = {};

		/* (3) Active popup */
		this.active = null;



		/* (2) Popups
		---------------------------------------------------------*/
		/* (1) Create a new Room */
		this.register('room.create', {
			data: {
				type: 'text',
				name: ''
			},
			reset(){ this.data.type = 'text'; this.data.name = ''; },
			submit(){ gs.get.room.create(this.data.type, this.data.name) && this.parent.hide(); }
		});
		/* (2) Create a new Channel */
		this.register('channel.create', {
			data: {
				name: '',
				link: ''
			},
			reset(){ this.data.link = '', this.data.name = ''; },
			submit(){ gs.get.channel.create(this.data.name, this.data.link) && this.parent.hide(); }
		});
		/* (3) Change nickname */
		this.register('nickname.change', {
			data: {
				value: ''
			},
			reset(){ this.data.value = ''; },
			submit(){ gs.get.content.change_username(this.data.value) && this.parent.hide(); }
		});
		/* (4) Invite to channel */
		this.register('channel.invite', {
			data: {
				username: ''
			},
			reset(){ this.data.username = ''; },
			submit(){ gs.get.channel.invite(this.data.username) && this.parent.hide(); }
		});
		/* (5) Remove channel */
		this.register('channel.remove', {
			data: {},
			reset(){ },
			submit(){ gs.get.channel.remove() && this.parent.hide(); }
		});
		/* (6) Leave channel */
		this.register('channel.leave', {
			data: {},
			reset(){ },
			submit(){ gs.get.channel.remove() && this.parent.hide(); }
		});


	}


	/* (2) Regiters a new popup
	*
	* @name<String>						Popup name
	* @data<Object>						Popup structure
	*
	*   [data.structure]
	* {
	*	reset:  <Function>,
	*	submit: <Function>,
	*	active: <bool>, // will be generated automatically
	*	data:   <Object>
	* }
	*
	---------------------------------------------------------*/
	register(name, popup){

		/* (1) Error: invalid @name */
		if( typeof name !== 'string' )
			return false;

		/* (2) Error: invalid @data */
		if( typeof popup !== 'object' )
			return false;

		/* (3) Error: @name already used */
		if( this.list[name] != null )
			return false;

		/* (3) Store popup */
		this.list[name] = popup;

		/* (4) Add @parent ref */
		this.list[name].parent = this;

		/* (5) Hide by default */
		this.list[name].active = false;

		return true;

	}



	/* (3) Unregiters an existing popup
	*
	* @name<String>						Popup name
	*
	---------------------------------------------------------*/
	unregister(name){

		/* (1) Error: invalid @name */
		if( typeof name !== 'string' )
			return false;

		/* (2) Error: @name not used */
		if( this.list[name] == null )
			return false;

		/* (3) If popup is @active -> hide */
		if( this.active === name )
			this.hide();

		/* (3) Unregister popup */
		delete this.list[name];

	}



	/* (4) Show a popup
	*
	* @name<String>						Popup name
	*
	---------------------------------------------------------*/
	show(name){

		/* (1) Error: invalid @name */
		if( typeof name !== 'string' )
			return false;

		/* (2) Error: @name not used */
		if( this.list[name] == null )
			return false;

		/* (3) Hide @active popup */
		this.hide();

		/* (4) Active popup */
		this.active = name;

		/* (5) Show background */
		this.filter = true;

		/* (6) Reset popup */
		this.list[name].reset();

		/* (7) Show popup */
		this.list[name].active = true;

	}



	/* (5) Hide currently @active popup
	*
	---------------------------------------------------------*/
	hide(){

		/* (1) Error: if no active popup */
		if( this.active == null )
			return false;

		/* (2) Error: @active not exists */
		if( this.list[this.active] == null )
			return false;

		/* (3) Hide background */
		this.filter = false;

		/* (4) Hide popup */
		this.list[this.active].active = false;

		/* (5) Reset popup */
		this.list[this.active].reset();

		/* (6) Reset @active */
		this.active = null;

	}


	/* (6) Data getter
	*
	* @name<String>						Popup name
	*
	*
	---------------------------------------------------------*/
	get(name){

		/* (1) Error: invalid @name */
		if( typeof name !== 'string' )
			return { data: {} };

		/* (2) Error: @name not used */
		if( this.list[name] == null )
			return { data: {} };

		/* (3) Return data */
		return this.list[name];

	}



}