package me.teridax.jcash.gui;

import me.teridax.jcash.banking.BankingManagementSystem;

import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;

public class Loader {

    private static final FileNameExtensionFilter FILE_FILTER = new FileNameExtensionFilter("Comma separated value spreadsheet", "csv", "CSV");

    public static BankingManagementSystem load() throws IllegalStateException {
        var fileChooser = new JFileChooser();
        fileChooser.setMultiSelectionEnabled(false);
        fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
        fileChooser.setFileFilter(FILE_FILTER);
        fileChooser.setDialogType(JFileChooser.OPEN_DIALOG);
        fileChooser.setAcceptAllFileFilterUsed(false);

        if (fileChooser.showDialog(null, "Load database") == JFileChooser.APPROVE_OPTION) {
            try {
                return BankingManagementSystem.loadFromCsv(fileChooser.getSelectedFile().toPath());
            } catch (Exception e) {
                throw new IllegalStateException("Unable to load database", e);
            }
        }

        throw new IllegalStateException("No file selected");
    }
}