#include <fstream>
#include <iostream>
#include <vector>
#include "Relation.h"

//still in progress
class DBEngine {
	vector<Relation> tables;
	int size;

public:
	DBEngine(){
		size = 0;
	}

	void createTable(string n, vector<Attribute> a) {
		Relation r(n, a);
		tables.push_back(r);
	}
	
	void createTable(Relation r) {
		tables.push_back(r);
	}
	
	Relation getTableFromName(string n) {
		//will return first occurence
		for(int i = 0; i < tables.size(); i++) {
			if (tables[i].getTableName() == n) {
				return tables[i];
			}
		}
	}
	
	void showTables(Relation r) { 	
		r.display();
	}
	
	void saveToFile() { /*Becca*/ }
	void insertTuple() { /*DONE*/ }
	void deleteTuple() { /*DONE*/ }
	void selectTuples() { /*William*/ }
	void project() { /*DONE*/ }
	void product() { /*Brandon*/ }
	
	bool unionComp(Relation r1, Relation r2) { 
		//Two relations are union-compatible if they have the same # of attributes and each attribute must be
		//from the same domain
		
	}
	
	
	vector<Relation> getRelations() {
		return tables;
	}
};