package com.example.alpotzh.controller;

import com.example.alpotzh.model.Bejglibolt;
import com.example.alpotzh.model.Megrendeles;
import jakarta.servlet.*;
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;

import java.io.IOException;

import static java.lang.Integer.parseInt;

@WebServlet(name = "RendelesAdatokServlet", value = "/RendelesAdatokServlet")
public class RendelesAdatokServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int inputId = parseInt(request.getParameter("id"));
        Megrendeles megrendeles = Bejglibolt.getInstance().findRendelesId(inputId);
        if(megrendeles!=null){
            request.setAttribute("megrendeles",megrendeles);
            request.getRequestDispatcher("index.jsp").forward(request,response);
        } else {
            request.setAttribute("message", "Megrendelés nem található");
            request.getRequestDispatcher("index.jsp").forward(request,response);
        }

    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }
}

package com.example.alpotzh.controller;

import com.example.alpotzh.model.Bejgli;
import com.example.alpotzh.model.BejgliTipus;
import com.example.alpotzh.model.Bejglibolt;
import com.example.alpotzh.model.Megrendeles;
import jakarta.servlet.*;
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;

import java.io.IOException;

import static java.lang.Integer.parseInt;

@WebServlet(name = "RendelesServlet", value = "/RendelesServlet")
public class RendelesServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        BejgliTipus tipus = BejgliTipus.valueOf(request.getParameter("tipus"));
        Bejglibolt bolt = Bejglibolt.getInstance();
        int mennyiseg = parseInt(request.getParameter("db"));
        boolean rumos = request.getParameter("rumos")!=null;
        boolean vegan = request.getParameter("vegan")!=null;
        if(bolt.getBejglik().stream().anyMatch(b->b.getTipus().equals(tipus)&&b.isRumosE()==rumos&&b.isVeganE()==vegan&&b.getMennyiseg()>=mennyiseg)) {
        //if(bolt.getBejglik().stream().anyMatch(b->b.equals(new Bejgli(tipus,mennyiseg,rumos,vegan)))){
            Bejgli rendelendo = new Bejgli(tipus,mennyiseg,rumos,vegan);
            rendelendo.decreaseDarabszam(mennyiseg);
            bolt.addMegrendeles(new Megrendeles(rendelendo,mennyiseg));
            request.setAttribute("message","sikeres rendelés");
        }
        else{
            request.setAttribute("message","rendelés nem teljesíthető, mert nincs elegendő mennyiség a kért bejgliből");
        }
        request.getRequestDispatcher("rendeles.jsp").forward(request,response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }
}

package com.example.alpotzh.model;

public class Bejgli {
    private BejgliTipus tipus;

    public void setMennyiseg(int mennyiseg) {
        this.mennyiseg = mennyiseg;
    }

    private int mennyiseg;
    private boolean veganE;

    public BejgliTipus getTipus() {
        return tipus;
    }

    public int getMennyiseg() {
        return mennyiseg;
    }

    public boolean isVeganE() {
        return veganE;
    }

    public boolean isRumosE() {
        return rumosE;
    }

    private boolean rumosE;


    public Bejgli(BejgliTipus tipus, int mennyiseg, boolean veganE, boolean rumosE) {
        this.tipus = tipus;
        this.mennyiseg = mennyiseg;
        this.veganE = veganE;
        this.rumosE = rumosE;
    }

    @Override
    public String toString() {
        return "Íz: " + tipus +
                ", veganE=" + veganE +
                ", rumosE=" + rumosE;
    }

    public void decreaseDarabszam(int input) {
        this.mennyiseg = mennyiseg-input;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Bejgli bejgli = (Bejgli) o;

        if (veganE != bejgli.veganE) return false;
        if (rumosE != bejgli.rumosE) return false;
        return tipus == bejgli.tipus;
    }

    @Override
    public int hashCode() {
        int result = tipus.hashCode();
        result = 31 * result + (veganE ? 1 : 0);
        result = 31 * result + (rumosE ? 1 : 0);
        return result;
    }
}

package com.example.alpotzh.model;

import java.util.ArrayList;

public class Bejglibolt {
    private static Bejglibolt instance;

    public ArrayList<Bejgli> getBejglik() {
        return bejglik;
    }

    public ArrayList<Megrendeles> getMegrendelesek() {
        return megrendelesek;
    }

    private ArrayList<Bejgli> bejglik;
    private ArrayList<Megrendeles> megrendelesek;

    public static Bejglibolt getInstance() {
        if (instance == null) {
            instance = new Bejglibolt();
        }
        return instance;
    }

    private Bejglibolt() {
        this.bejglik = new ArrayList();
        this.megrendelesek = new ArrayList<>();
        Bejgli a1= new Bejgli(BejgliTipus.Dios,40,true,true);
        Bejgli a2= new Bejgli(BejgliTipus.Makos,30,false,true);
        Bejgli a3= new Bejgli(BejgliTipus.Gesztenyes,15,true,false);
        bejglik.add(a1);
        bejglik.add(a2);
        bejglik.add(a3);

        megrendelesek.add(new Megrendeles(a1,5));
        megrendelesek.add(new Megrendeles(a1,12));
        megrendelesek.add(new Megrendeles(a2,5));
        megrendelesek.add(new Megrendeles(a3,5));
    }

    public Megrendeles findRendelesId(int id){
        return megrendelesek.stream().filter(a->a.getId()==id).findFirst().orElse(null);
    }

    public void addMegrendeles(Megrendeles m){
        //darabszám csökkentése nem sikerült, voltak nullpointerexceptionok teszt közben
        //bejglik.stream().filter(b->b.getTipus().equals(m.getRendelendo().getTipus())&&b.isRumosE()==m.getRendelendo().isRumosE()&&b.isVeganE()==m.getRendelendo().isVeganE()&&b.getMennyiseg()>=m.getRendelendo().getMennyiseg()).findFirst().get().decreaseDarabszam(m.getDb());
        //m.getRendelendo().setMennyiseg(m.getRendelendo().getMennyiseg()-m.getDb());
        findBejgli(m.getRendelendo()).decreaseDarabszam(m.getDb());
        megrendelesek.add(m);
    }

    public Bejgli findBejgli(Bejgli bejgli){
        return bejglik.stream().filter(b->b.isVeganE()== bejgli.isVeganE()).filter(b->b.isRumosE()==bejgli.isRumosE()).filter(b->b.getTipus().equals(bejgli.getTipus())).findFirst().orElse(null);
    }


}


package com.example.alpotzh.model;

public enum BejgliTipus {
    Makos,
    Dios,
    Gesztenyes
}


package com.example.alpotzh.model;

public class Megrendeles {
    public int getId() {
        return id;
    }

    public int getDb() {
        return db;
    }

    private int id;
    static int nextId = 0;

    public Bejgli getRendelendo() {
        return rendelendo;
    }

    private Bejgli rendelendo;
    private int db;

    public Megrendeles(Bejgli rendelendo, int db) {
        this.id = nextId++;
        this.rendelendo = rendelendo;
        this.db = db;
    }
}


<%@ page import="com.example.alpotzh.model.Megrendeles" %>
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %>
</h1>
<br/>
<form method="get" action="RendelesAdatokServlet">
    Rendelésszám: <input type="number" name="id">
    <input type="submit" value="Küldés">
</form>
<a href="rendeles.jsp">Rendelés</a>

<%=
    request.getAttribute("message") == null ? "" : request.getAttribute("message")
%>
<%
    //if(request.getAttribute("megrendeles")!=null)
        Megrendeles megrendeles = (Megrendeles)request.getAttribute("megrendeles");
    if(megrendeles!=null){
        %>
        <table border="1">
            <tr>
                <td>
                    Id: <%=megrendeles.getId()%>
                </td>
                <td>
                    Bejgli: <%=megrendeles.getRendelendo()%>
                </td>
                <td>
                    Mennyiség: <%=megrendeles.getDb()%>
                </td>
            </tr>
        </table>
<%
    };
%>
</body>
</html>

<%@ page import="com.example.alpotzh.model.Bejglibolt" %>
<%@ page import="com.example.alpotzh.model.BejgliTipus" %>
<%@ page import="com.example.alpotzh.model.Bejgli" %><%--
  Created by IntelliJ IDEA.
  User: kklev
  Date: 2022. 01. 03.
  Time: 14:48
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Rendelés</title>
</head>
<body>
<h1>
    Rendelj bejglit :)
</h1>
<form method="get" action="RendelesServlet">
    Ízesítés: <select name="tipus">
    <option value="<%=BejgliTipus.Dios%>">Diós</option>
    <option value="<%=BejgliTipus.Makos%>">Mákos</option>
    <option value="<%=BejgliTipus.Gesztenyes%>">Gesztenyés</option>
</select><br/>
    Rumos? <input type="checkbox" name="rumos"><br/>
    Vegán? <input type="checkbox" name="vegan"><br/>
    Mennyiség: <input type="number" name="db"><br/>
    <input type="submit" value="Rendelés">
</form><br/>
<%=
request.getAttribute("message") == null ? "" : request.getAttribute("message")
%>
</body>
</html>