package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import jdk.internal.util.xml.impl.Input;

import java.io.*;
import java.net.URL ;
import java.util.ResourceBundle;
import java.util.Stack;
import java.util.Vector;

public class Controller implements Initializable {
    @FXML
    public Button one ;
    public Button two ;
    public Button three ;
    public Button four ;
    public Button five ;
    public Button six ;
    public Button seven ;
    public Button eight ;
    public Button nine ;
    public Button zero ;
    public Button point ;
    public Button clear ;
    public Button delete ;
    public Button next ;
    public Button prev ;
    public Button save ;
    public Button load ;
    public Button add ;
    public Button minus ;
    public Button divided ;
    public Button multi ;
    public Button equal ;
    public Button negative ;
    public TextField input ;
    public Label prom ;
    private double fNumber ;
    private double sNumber ;
    private String result ;
    private String operation , n , m,temp ;
    private Vector<String> equation ;
    private Stack previous = new Stack();
    private Stack nextt = new Stack();
    private Stack<String> opP = new Stack();
    private Stack<String> opN = new Stack();
    private boolean flag = false ;
    private boolean flag1 = false ;
    @Override
    public void initialize (URL arg0 , ResourceBundle arg1){

    }
    public void input(String s ){
        temp = s ;
        equation.add(s);
        prom.setText(s);
    }
    public String getResult() {
        for (int i = 1; i < temp.length(); i++) {
            if (temp.charAt(i) == '+' || temp.charAt(i) == '-' || temp.charAt(i) == 'x' || temp.charAt(i) == '/') {
                operation = String.valueOf(temp.charAt(i));
            }
        }
        for (int i = 0; i < temp.length(); i++) {
            if (temp.charAt(i) == operation.charAt(0)) {
                flag = true;
            }
            if (!flag && temp.charAt(i) != operation.charAt(0)) {
                m = m + temp.charAt(i);
                this.fNumber = Double.valueOf(m);
            } else if (flag && temp.charAt(i) != operation.charAt(0)) {
                n = n + temp.charAt(i);
                this.sNumber = Double.valueOf(n);
            }
        }
        switch (operation) {
            case "+":
                Double system = this.fNumber + this.sNumber;
                previous.push(system);
                input.setText(String.valueOf(system));
                result = String.valueOf(system);
                String oldProm = prom.getText();
                prom.setText(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                opP.push(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                operation = "=";
            break;
            case "-":
                Double systemMinus = this.fNumber - this.sNumber;
                previous.push(systemMinus);
                input.setText(String.valueOf(systemMinus));
                result = String.valueOf(systemMinus);
                String oldPromMinus = prom.getText();
                prom.setText(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                opP.push(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                operation = "=";
            break;
            case "x":
                Double systemMulti = this.fNumber * this.sNumber;
                previous.push(systemMulti);
                input.setText(String.valueOf(systemMulti));
                result = String.valueOf(systemMulti) ;
                String oldPromMulti = prom.getText();
                prom.setText(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                opP.push(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                operation = "=";
            break;
            case "/":
                if (this.sNumber == 0.0) {
                    input.setText("error");
                } else {
                    Double systemDevided = this.fNumber / this.sNumber;
                    previous.push(systemDevided);
                    input.setText(String.valueOf(systemDevided));
                    result = String.valueOf(systemDevided);
                    String oldPromDevided = prom.getText();
                    prom.setText(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                    opP.push(String.valueOf(this.fNumber) + operation + String.valueOf(this.sNumber));
                    operation = "=";
                }
                break;
        }
        return result;
    }
    public String Current(){
        if(!opP.isEmpty()){
            return opP.peek();
        }else{
            return null ;
        }
    }
    public String prev(){
        if(!opP.isEmpty()){
            opN.push(opP.peek());
            return opP.pop();
        }else{
            return null ;
        }
    }
    public String next(){
        if(!opN.isEmpty()){
            opP.push(opP.peek());
            return opN.pop();
        }else{
            return null ;
        }
    }
    public void save(){
        try{

            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("history.file"));
            out.writeObject(equation);
            out.writeObject(previous);
            out.flush();
            out.close();
        }catch (Exception a){
            throw new RuntimeException("save failed");
        }
    }
    public void load(){
        try{
            ObjectInputStream in=new ObjectInputStream(new FileInputStream("history.file"));
            equation=(Vector<String>) in.readObject();
            previous = (Stack<String>) in.readObject();
            prom.setText(equation.lastElement());
            input.setText(String.valueOf(previous.peek()));
        }catch (Exception a){
            throw new RuntimeException("load failed");
        }
    }

    public void point_Click(){
        if(operation=="="&&!flag1){
            clear_Click();
        }
        flag1 = false ;
        String oldValue = input.getText();
        String set = String.valueOf('.');
        input.setText(oldValue+set);
    }
    public void zero_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String  set = String.valueOf("0");
        input.setText(oldValue+set);
    }
    public void one_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("1");
        input.setText(oldValue+set);
    }
    public void two_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("2");
        input.setText(oldValue+set);
    }
    public void three_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("3");
        input.setText(oldValue+set);
    }
    public void four_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("4");
        input.setText(oldValue+set);
    }
    public void five_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("5");
        input.setText(oldValue+set);
    }
    public void six_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("6");
        input.setText(oldValue+set);
    }
    public void seven_Click() {
        if (operation == "=") {
            clear_Click();
        }
            String oldValue = input.getText();
            String set = String.valueOf("7");
            input.setText(oldValue + set);
    }
    public void eight_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("8");
        input.setText(oldValue+set);
    }
    public void nine_Click(){
        if(operation=="="){
            clear_Click();
        }
        String oldValue = input.getText();
        String set = String.valueOf("9");
        input.setText(oldValue+set);
    }
    public void clear_Click(){
        input.setText("");
        prom.setText("");
        this.fNumber = 0 ;
        this.sNumber = 0 ;
    }
    public void multi_Click(){
        String value = input.getText();
        Double valueNumber = Double.valueOf(value);
        this.fNumber = valueNumber ;
        input.setText("");
        prom.setText(value + "x");
        operation = "x" ;
    }
    public void add_Click(){
        String value = input.getText();
        Double valueNumber = Double.valueOf(value);
        this.fNumber = valueNumber ;
        input.setText("");
        prom.setText(value + "+");
        operation = "+" ;
    }
    public void minus_Click(){
        String value = input.getText();
        Double valueNumber = Double.valueOf(value);
        this.fNumber = valueNumber ;
        input.setText("");
        prom.setText(value + "-");
        operation = "-" ;
    }
    public void divided_Click(){
        String value = input.getText();
        Double valueNumber = Double.valueOf(value);
        this.fNumber = valueNumber ;
        input.setText("");
        prom.setText(value + "/");
        operation = "/" ;
    }
    public void equal_Click(){
        switch (operation){
            case "+" :
                String value = input.getText();
                this.sNumber = Double.valueOf(value);
                Double system = this.fNumber + this.sNumber ;
                previous.push(system);
                input.setText(String.valueOf(system));
                String oldProm = prom.getText();
                prom.setText(oldProm + value);
                opP.push(oldProm + value);
                operation = "=";
                flag1 = true ;
                break;
            case "-" :
                String valueMinus = input.getText();
                this.sNumber = Double.valueOf(valueMinus);
                Double systemMinus = this.fNumber - this.sNumber ;
                previous.push(systemMinus);
                input.setText(String.valueOf(systemMinus));
                String oldPromMinus = prom.getText();
                prom.setText(oldPromMinus + valueMinus);
                opP.push(oldPromMinus + valueMinus);
                operation = "=";
                flag1 = true ;
                break;
            case "x" :
                String valueMulti = input.getText();
                this.sNumber = Double.valueOf(valueMulti);
                Double systemMulti = this.fNumber * this.sNumber ;
                previous.push(systemMulti);
                input.setText(String.valueOf(systemMulti));
                String oldPromMulti = prom.getText();
                prom.setText(oldPromMulti + valueMulti);
                opP.push(oldPromMulti + valueMulti);
                operation = "=";
                flag1 = true ;
                break;
            case "/" :
                String valueDevided = input.getText();
                this.sNumber = Double.valueOf(valueDevided);
                if (this.sNumber == 0.0){
                    input.setText("error");
                }else {
                    Double systemDevided = this.fNumber / this.sNumber;
                    previous.push(systemDevided);
                    input.setText(String.valueOf(systemDevided));
                    String oldPromDevided = prom.getText();
                    prom.setText(oldPromDevided + valueDevided);
                    opP.push(oldPromDevided + valueDevided);
                    operation = "=";
                    flag1 = true ;
                }
                break;
        }
    }
    public void save_Click() {
            try{

                ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("history.file"));
                out.writeObject(opP);
                out.writeObject(previous);
                out.flush();
                out.close();
                System.out.println("saved");
            }catch (Exception a){
                throw new RuntimeException("save failed");
            }
    }
    public void load_Click(){
            try{
                ObjectInputStream in=new ObjectInputStream(new FileInputStream("history.file"));
                opP=(Stack<String>) in.readObject();
                previous = (Stack<String>) in.readObject();
                prom.setText(opP.peek());
                input.setText(String.valueOf(previous.peek()));
            }catch (Exception a){
                throw new RuntimeException("load failed");
            }
    }
    public void next_Click(){
        if(!nextt.isEmpty()) {
            opP.push(opN.peek());
            prom.setText(String.valueOf(opN.pop()));
            previous.push(nextt.peek());
            input.setText(String.valueOf(nextt.pop()));

        }
    }
    public void prev_Click(){
        if(!previous.isEmpty()) {
            opN.push(opP.peek());
            prom.setText(String.valueOf(opP.pop()));
            nextt.push(previous.peek());
            input.setText(String.valueOf(previous.pop()));
        }
    }
    public void negative_Click(){
        String value = input.getText();
        Double valueNumber = Double.valueOf(value);
        valueNumber = -1*valueNumber ;
        value = String.valueOf(valueNumber);
        input.setText( value);
    }



}