package com.mavlon.finances;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;

public class Main {
    private final static BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

    public static void main(String[] args) {
        Person person = new Person();
        int choice;

        if (Files.exists(Path.of("person"))) {
            try (ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("person"))) {
                person = (Person) objectInputStream.readObject();
            } catch (IOException | ClassNotFoundException ioException) {
                ioException.printStackTrace();
            }
        } else {
            System.out.println("Take a short survey:");
            System.out.println();
            setPersonsInformationAboutWallet(person);
            System.out.println();
            setPersonsInformationAboutCountry(person);
            System.out.println();
            setPersonsInformationAboutJob(person);
            System.out.println();
            setPersonsInformationAboutDreamItem(person);
            System.out.println();
        }

        do {
            System.out.println("""
                Menu:
                1) Wallet info
                11) Put money to wallet
                12) Take money from wallet
                2) Job info
                21) I have worked a month
                22) Change job
                3) Dream item info
                31) When I will be able to buy?
                32) Change dream item
                33) Change dream item cost
                4) Country info
                41) Change country
                5) Statistics
                6) Save and exit
                """);
            try {
                System.out.print("Enter number: ");
                choice = Integer.parseInt(bufferedReader.readLine());
                System.out.print("\n");
            } catch (IOException ioException) {
                choice = -1;
            }
            switch (choice) {
                case 1 -> System.out.println(person.wallet);
                case 11 -> {
                    System.out.print("Enter how much money put: ");
                    try {
                        person.wallet.put(Double.parseDouble(bufferedReader.readLine()));
                    } catch (IOException ioException) {
                        System.out.println("Invalid number. Try again.");
                    }
                }
                case 12 -> {
                    double money;

                    System.out.print("Enter how much money take: ");
                    try {
                        money = Double.parseDouble(bufferedReader.readLine());
                        person.wallet.take(money);
                        person.statistics.addExpenses(money);
                    } catch (IOException ioException) {
                        System.out.println("Invalid number. Try again.");
                    }
                }
                case 2 -> System.out.println(person.job);
                case 21 -> person.wallet.put(person.statistics.getMonthlyNetSalary());
                case 22 -> setPersonsInformationAboutJob(person);
                case 3 -> System.out.println(person.dreamItem);
                case 31 -> System.out.println(person.wallet.getMoney() > person.dreamItem.getCost() ? "Congratulations! You already can buy your dream item!"
                            : "You have to work " + (int) Math.ceil((person.dreamItem.getCost() - person.wallet.getMoney()) / person.statistics.getMonthlyNetSalary()) + " months.");
                case 32 -> setPersonsInformationAboutDreamItem(person);
                case 33 -> {
                    System.out.print("How much your dream item costs? ");
                    try {
                        person.dreamItem.setCost(Double.parseDouble(bufferedReader.readLine()));
                    } catch (IOException ioException) {
                        System.out.println("Invalid number. Try again.");
                    }
                }
                case 4 -> System.out.println(person.country);
                case 41 -> setPersonsInformationAboutCountry(person);
                case 5 -> System.out.println(person.statistics);
                case 6 -> {
                    try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("person"))) {
                        objectOutputStream.writeObject(person);
                    } catch (IOException ioException) {
                        ioException.printStackTrace();
                    }
                    System.out.println("Good bye!");
                }
                default -> System.out.println("Incorrect input. Try again.");
            }
        } while (choice != 6);
    }

    private static void setPersonsInformationAboutWallet(Person person) {
        try {
            System.out.print("How much money do you have? ");
            person.wallet.setMoney(Double.parseDouble(bufferedReader.readLine()));
        } catch (IOException ioException) {
            System.out.println("Incorrect input. Try again.");
            setPersonsInformationAboutWallet(person);
        }
    }

    private static void setPersonsInformationAboutCountry(Person person) {
        try {
            System.out.print("How much is state tax rate in your country? ");
            person.country.setStateTaxRate(Double.parseDouble(bufferedReader.readLine()));
            System.out.print("How much is federal tax rate in your country? ");
            person.country.setFederalTaxRate(Double.parseDouble(bufferedReader.readLine()));
            setPersonsInformationAboutStatistics(person);
        } catch (IOException ioException) {
            System.out.println("Incorrect input. Try again.");
            setPersonsInformationAboutCountry(person);
        }
    }

    private static void setPersonsInformationAboutJob(Person person) {
        try {
            System.out.print("What is your job? ");
            person.job.setName(bufferedReader.readLine());
            System.out.print("How many hours do you work per week? ");
            person.job.setHoursPerWeek(Double.parseDouble(bufferedReader.readLine()));
            System.out.print("How much is your hourly pay? ");
            person.job.setHourlyPayRate(Double.parseDouble(bufferedReader.readLine()));
            setPersonsInformationAboutStatistics(person);
        } catch (IOException ioException) {
            System.out.println("Incorrect input. Try again.");
            setPersonsInformationAboutJob(person);
        }
    }

    private static void setPersonsInformationAboutDreamItem(Person person) {
        try {
            System.out.print("What is your dream item? ");
            person.dreamItem.setName(bufferedReader.readLine());
            System.out.print("How much your dream item costs? ");
            person.dreamItem.setCost(Double.parseDouble(bufferedReader.readLine()));
        } catch (IOException ioException) {
            System.out.println("Incorrect input. Try again.");
            setPersonsInformationAboutDreamItem(person);
        }
    }

    private static void setPersonsInformationAboutStatistics(Person person) {
        double monthlyGrossSalary = person.job.getHourlyPayRate() * person.job.getHoursPerWeek() * 4;
        double monthlyTaxes = monthlyGrossSalary * (person.country.getStateTaxRate() + person.country.getFederalTaxRate()) / 100;
        double monthlyNetSalary = monthlyGrossSalary - monthlyTaxes;

        person.statistics.setMonthlyGrossSalary(monthlyGrossSalary);
        person.statistics.setMonthlyTaxes(monthlyTaxes);
        person.statistics.setMonthlyNetSalary(monthlyNetSalary);
    }
}