/*

	Copyright (c) 2020, 2023, The Unified Company.

	This code is part of Unify.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the ESA Software Community License - Strong Copyleft LICENSE,
	as published by the ESA.
	See the ESA Software Community License - Strong Copyleft LICENSE, for more details.

	https://unifyjs.org 

*/

import tools	 		from '../unify/tools.js';

import Console			from './console.js';

import database			from './database.js';

import datatype 		from '../unify/datatype.js';

import collection		from '../unify/collection.js';

import querySQL	 		from '../unify/querySQL.js';

import tableLogger		from './tableLogger.js';


export default class databaseManager{

	tables 	= new Array();

	parse( object ) {

		if( object.type == "table" ) {

			if( !object.table ) {

				var objectName 		= object.getClassName();

				var tableObject 	= tools.getTableFromObject( object );

				
				object.table = tableObject;

			} else {

				var tableObject = object.table;

			}
			
			this.addTable( tableObject )

		}
		
	}
	
	addTable( tableObject ) {
	
		var className = tools.getClassName( tableObject );
		
		if ( !this.getTableByName( className ) ) {

			this.tables.push( tableObject );
		
		}
	
	}
	
	
	getTableByName( name ){

		for( var c = 0; c<this.tables.length; c++ ) {
		
			var table = this.tables[c];

			if( tools.getClassName( table ) == name ) {

				return table;

			}
		}
		
		return false;

	}

	ensureTableColumsTable() {

		var tableExists = database.tableExists("tableColumns")  

		
		if( !tableExists ) {

			console.log("New database detected, Creating tableColumns table and columns.");

			this.setup();

		}

		//database
		//setup

	}
	
	

	createTables() {

		this.ensureTableColumsTable();
	
		var tables 	= this.tables;

		for( var c = 0; c < tables.length; c++ ) {
		
			var table = tables[c];

			this.createTable( table );

		}

	}
	
	getObjectByclassName( className ) {
	
		var objectCollection = new collection();

		objectCollection.set( this.tables );
		
		objectCollection.filter( "class", 	className );


		return objectCollection.getFirstRow();

	}

	logTable( tableName, children ) {

		var tableLog = new tableLogger();

		tableLog.setTable( tableName, [18, 18] );

		for ( var c = 0; c < children.length; c++ ) {
		
			var child = children[c];

			var column = this.parseColumn( child, tableName );

			tableLog.addColumn( column, datatype.TEXT );

		}

		tableLog.log();

	}

	createTable( object ) {
	
		var tableName = tools.getClassName( object );

		database.createTable( tableName );

		database.cleanTable( tableName );
		
		database.addColumn( "joined",  datatype.TEXT, tableName );


		var children = object.getChildren();

		this.logTable( tableName, children );

	}
	
	parseColumnObject( object, tableName, columnName ) {

		if( tools.objectIsTable( object )  ) {
			
			// hasOne
			database.addColumn( columnName + "_id", "INTEGER", tableName );

		} else {
			
			// regular column
			database.addColumn( columnName, object.datatype, tableName );

		}

	}

	parseColumn(  object, tableName ) {

		var objectName 		= tools.getClassName( object.parent );

		var columnName		= object.propertyName;
		
		if( tools.isUnifyObject( columnName, object ) ) { 

			if( tools.getClassName( object ) == "collection" ) {

				// collection join
				var column 	= this.createJoinTable( object, object.datatype );

			} else {

				this.parseColumnObject( object, tableName, columnName );

				var column	= columnName;
				
			}

		}
		
		return column;

	}	
	
	createJoinTable( object ) {
	
		object.update();

		var parentTableName	= object.getLeft();

		var objectName		= object.getRight();

		var propertyName	= object.propertyName;
		
		var tableName 		= object.parentName + "_" + propertyName;


		database.createTable( tableName );

		database.addColumn( "joint",  datatype.TEXT, tableName );

		database.addColumn( parentTableName  	+ "_id", "INTEGER", tableName );

		database.addColumn( objectName  		+ "_id", "INTEGER", tableName );


		var tableLog = new tableLogger();
		
		tableLog.setTable( tableName, new Array( 18, 18 )  );

		tableLog.addColumn( parentTableName  	+ "_id", "INTEGER" );

		tableLog.addColumn( objectName  		+ "_id", "INTEGER" );

		tableLog.log();

	}

	
	createColumn( column_name, type, columns_array ) {

		var column 		= new Object();
		
		column.name 	= column_name;

		column.type 	= type;
		
		if( columns_array ) {
		
			columns_array.push( column );
		
		}
		
		return column;

	}
	
	setup() {
		
		var tableName	=  "tableColumns";
	
		database.createTable( tableName );


		
		database.addColumnSimple( "tableName",  datatype.TEXT, tableName );

		database.addColumnSimple( "columnName", datatype.TEXT, tableName );

		database.addColumnSimple( "datatype", datatype.TEXT, tableName );

		
	}
	
}