package application;
//STEP 1. Import required packages
import java.sql.*;
import java.util.*;

public class GrafoDB {
    // JDBC driver name and database URL
    static final String JDBC_DRIVER = "org.postgresql.Driver";
    static final String DB_URL = "jdbc:postgresql://[::1]:5432/postgres";

    //  Database credentials
    static final String USER = "postgres";
    static final String PASS = "ayelen";

    public void conexion() {
        Connection conn = null;
        Statement stmt = null;
        try{
            //STEP 2: Register JDBC driver
            Class.forName("org.postgresql.Driver");

            //STEP 3: Open a connection
            System.out.println("Connecting to database...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            //STEP 4: Execute a query
            System.out.println("Creating database...");
            stmt = conn.createStatement();

            System.out.println("Database created successfully...");
        }catch(SQLException se){
            //Handle errors for JDBC
            se.printStackTrace();
        }catch(Exception e){
            //Handle errors for Class.forName
            e.printStackTrace();
        }finally{
            //finally block used to close resources
            try{
                if(stmt!=null)
                    stmt.close();
            }catch(SQLException se2){
            }// nothing we can do
            try{
                if(conn!=null)
                    conn.close();
            }catch(SQLException se){
                se.printStackTrace();
            }//end finally try
        }//end try
        System.out.println("Goodbye!");
    }//end main
    //end JDBCExample

    public static void main(String[] args){

        Connection conn = null;
        Statement stmt = null;
        try{
            //STEP 2: Register JDBC driver
            Class.forName("org.postgresql.Driver");

            //STEP 3: Open a connection
            System.out.println("Connecting to a selected database...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);
            System.out.println("Connected database successfully...");
            stmt = conn.createStatement();

            String sql = "CREATE TABLE IF NOT EXISTS grafoS " +
                    "( nombre_grafo VARCHAR(255), " +
                    " PRIMARY KEY ( nombre_grafo ))";

            stmt.executeUpdate(sql);

            sql = "DROP TABLE IF EXISTS nodos";
            stmt.executeUpdate(sql);

            sql = "CREATE TABLE IF NOT EXISTS nodos " +
                    "( id_nodo VARCHAR(255) not NULL, " +
                    " nombre_grafo VARCHAR(255) not NULL, " +
                    " PRIMARY KEY ( id_nodo, nombre_grafo )," +
                    " FOREIGN KEY ( nombre_grafo )  REFERENCES grafos(nombre_grafo))";

            stmt.executeUpdate(sql);

            sql = "DROP TABLE IF EXISTS arcos";
            stmt.executeUpdate(sql);

            sql = "CREATE TABLE arcos " +
                    "( id_arco VARCHAR(255) not NULL, " +
                    " nombre_grafo VARCHAR(255) not NULL, " +
                    " nodo1 VARCHAR(255) not NULL, " +
                    " nodo2 VARCHAR(255) not NULL," +
                    " PRIMARY KEY ( id_arco, nombre_grafo )," +
                    " FOREIGN KEY ( nombre_grafo )  REFERENCES grafos(nombre_grafo)," +
                    " FOREIGN KEY ( nodo1, nombre_grafo )   REFERENCES nodos (id_nodo, nombre_grafo)," +
                    " FOREIGN KEY ( nodo2, nombre_grafo )   REFERENCES nodos (id_nodo, nombre_grafo))";

            stmt.executeUpdate(sql);

            sql = "ALTER TABLE atributosnodos " +
                    "( id_nodo VARCHAR not NULL, " +
                    " nombre_grafo VARCHAR(255) not NULL, " +
                    " nombre_atributo VARCHAR(255) not NULL, " +
                    " valor VARCHAR(255), " +
                    " PRIMARY KEY ( id_nodo, nombre_grafo, nombre_atributo )," +
                    " FOREIGN KEY ( id_nodo, nombre_grafo)  REFERENCES nodos (id_nodo, nombre_grafo))";

        //  stmt.executeUpdate(sql);

            sql = "ALTER TABLE atributosarcos " +
                    "( id_arco VARCHAR not NULL, " +
                    " nombre_grafo VARCHAR(255) not NULL, " +
                    " nombre_atributo VARCHAR(255) not NULL, " +
                    " valor VARCHAR(255), " +
                    " PRIMARY KEY ( id_arco, nombre_grafo, nombre_atributo )," +
                    " FOREIGN KEY ( id_arco, nombre_grafo)  REFERENCES arcos (id_arco, nombre_grafo))";

            //stmt.executeUpdate(sql);

                    System.out.println("Created table in given database...");
        }catch(SQLException se){
            //Handle errors for JDBC
            se.printStackTrace();
        }catch(Exception e){
            //Handle errors for Class.forName
            e.printStackTrace();
        }finally{
            //finally block used to close resources
            try{
                if(stmt!=null)
                    conn.close();
            }catch(SQLException se){
            }// do nothing
            try{
                if(conn!=null)
                    conn.close();
            }catch(SQLException se){
                se.printStackTrace();
            }//end finally try
        }
    }


    public static void agregarGrafo(Grafo g){

        Set<Arco> arcos = g.getArcos();

        Set<Nodo> nodos = g.getNodos();



    }


}