import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.Scanner;

public class Vault implements VaultInterface {

    public boolean config;
    public int PWLength;
    public boolean haveCapitals;
    public boolean hasSpecialChars;
    public boolean hasNumbers;
    public boolean credentialM;
    public String userName;
    public String password;
    public int newID;
    public String newString;
    public boolean decision;
    InputStream inputS = System.in;
    OutputStream outputS = System.out;

    private CredentialRepository credentialRepository = new CredentialRepository();
    private PasswordGenerator passwordGenerator = new PasswordGenerator();

    /*public static void main (String args[]) {
        Vault vault = new Vault();
        vault.credentialMenu();
    }*/


    private void println(String output) {
        try {
            outputS.write((output + "\n").getBytes(StandardCharsets.UTF_8));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void configure(){
        StringBuilder sbcm = new StringBuilder();
        Scanner scan = new Scanner(inputS);
        config = true;

        sbcm.append("Configure:\n");
        sbcm.append("- Password length: l\n");
        sbcm.append("- Have capitals: h\n");
        sbcm.append("- Have special characters: s\n");
        sbcm.append("- Have Numbers: n\n");
        sbcm.append("- exit: e\n");

        println(sbcm.toString());

        String input = scan.nextLine();

        switch(input) {
            case "e":
                config = false;
                break;

            case "l":
                println("Set PW length:");
                String inputPw = scan.nextLine();
                setPWLength(inputPw);
                break;

            case "h":
                println("Should your PW have capitals? Type in yes or no.");
                String inputC = scan.nextLine();
                setCapital(inputC);
                break;

            case "s":
                println("Should you PW have special characters? Type in yes or no.");
                String inputS = scan.nextLine();
                setSpecialChar(inputS);
                break;

            case "n":
                println("Should you PW have numbers? Type in yes or no.");
                String inputN = scan.nextLine();
                setNumbers(inputN);
                break;
        }
    }

    public void setPWLength(String pwLength) {
        try {
            PWLength = Integer.parseInt(pwLength);
        } catch (NumberFormatException e) {
            println("Please enter valid number.");
        }

        println("\nNew password length is now: ");
    }


    public void addCredential(){
        Scanner scan = new Scanner(inputS);
        println("Type in username");
        userName = scan.nextLine();

        println("Do you want to set your password manually?\nyes or no");

        if(scan.nextLine().equals("yes")) {
            println("Type in password");
            password = scan.nextLine();
            credentialRepository.createNewCredential(userName, password);
        } else {
            println("Generating password.");
            password = passwordGenerator.generateRandomPassword();
            credentialRepository.createNewCredential(userName, password);
        }
    }

    public void showCredential() {
        Scanner scan = new Scanner(inputS);
        println("Type in ID or username");

        String str = scan.nextLine();
        Credential credential = null;

        if(str.matches("[0-9]+")) {
            println("Getting credential via ID");
            credential = credentialRepository.getCredentialsViaId(Integer.parseInt(str));
        } else {

            println("Getting credential via name");
            credential = credentialRepository.getCredentialsViaName(str);
        }

        if (credential != null) {
            println(credential.getName() + ": " + credential.getPassword());
        }
    }

    public void editCredential() {
        Scanner scan = new Scanner(inputS);

        println("Type ID to select credential:");
        newID = Integer.parseInt(scan.nextLine());

        println("-change username: u\n-change password: p");

        String input = scan.nextLine();

        if (input.equals("u")) {
            decision = true;
        }

        if(decision){

            println("Type new username:");
            newString = scan.nextLine();

            credentialRepository.updateUsername(newID, newString);
        } else {

            println("Type new password:");
            newString = scan.nextLine();

            credentialRepository.updatePassword(newID, newString);
        }
    }

    public void listCredentials() {
        for (Credential credential : credentialRepository.getCredentialList()) {
            println(String.format("ID: %d - Username: %s", credential.getId(), credential.getName()));
        }
    }

    public void getAsJson(){

    }

    public void loadFromJson(){

    }

    public void setCapital(String input) {

        if(input.equals("yes")){
            haveCapitals = true;
            println("Your PWs contain now capitals.");
        }else if(input.equals("no")){
            haveCapitals = false;
            println("Your PWs don´t have capitals anymore.");
        }
    }


    public void setSpecialChar(String input) {

        if(input.equals("yes")){
            hasSpecialChars = true;
            println("Your PWs contain now special characters.");
        }else if(input.equals("no")){
            hasSpecialChars = false;
            println("Your PWs don´t have special characters anymore.");
        }
    }

    public void setNumbers(String input) {

        if(input.equals("yes")){
            hasNumbers = true;
            println("Your PWs contains now numbers.");
        }else if(input.equals("no")){
            hasNumbers = false;
            println("Your PWs don´t have numbers anymore.");
        }
    }

    public void credentialMenu() {
        StringBuilder sbcm = new StringBuilder();
        Scanner scan = new Scanner(inputS);
        credentialM = true;

        sbcm.append("Configure credentials:\n");
        sbcm.append("- add credential: a\n");
        sbcm.append("- show credential: c\n");
        sbcm.append("- edit credential: l\n");
        sbcm.append("- list credentials: s\n");
        sbcm.append("- exit: e\n");

        println(sbcm.toString());

        String input = scan.nextLine();

        switch(input) {
            case "e":
                credentialM = false;
                break;

            case "a":
                println("Add credential:");
                addCredential();
                break;

            case "c":
                showCredential();
                break;

            case "l":
                editCredential();
                break;

            case "s":
                listCredentials();
                break;
        }
    }
}