using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data;
using System.Text.RegularExpressions;

namespace StaticCurrencyConverter
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Currency();
        }

        private void Currency()
        {
            //membuat tabel untuk list mata uang
            DataTable dataCurrency = new DataTable();

            //menambah isi kolom
            dataCurrency.Columns.Add("MataUang");
            dataCurrency.Columns.Add("Nilai");

            //menambah isi baris
            dataCurrency.Rows.Add("RUPIAH", 1);
            dataCurrency.Rows.Add("YEN", 134); //1 yen = 134 rupiah
            dataCurrency.Rows.Add("USD", 14560); //1 dolar = 14.560 rupiah

            //Memasukkan data ke combo box From
            combo1.ItemsSource = dataCurrency.DefaultView;
            combo1.DisplayMemberPath = "MataUang";
            combo1.SelectedValuePath = "Nilai";

            //Memasukkan data ke combo box To
            combo2.ItemsSource = dataCurrency.DefaultView;
            combo2.DisplayMemberPath = "MataUang";
            combo2.SelectedValuePath = "Nilai";
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            double ConvertedValue;

            //kasus ketika bagian 'Amount' masih kosong
            if(textamount.Text == null || textamount.Text.Trim() == "")
            {
                MessageBox.Show("Please input the amount you want", "Information", MessageBoxButton.OK, MessageBoxImage.Information);
                textamount.Focus();
                return;
            }

            //kasus ketika mata uang di 'From' belum dipilih
            else if (combo1.Text == null || combo1.Text.Trim() == "")
            {
                MessageBox.Show("Please Choose The Currency You Want To Convert From", "Information", MessageBoxButton.OK, MessageBoxImage.Information);
                combo1.Focus();
                return;
            }

            //kasus ketika mata uang di 'To' belum dipilih
            else if(combo2.Text == null || combo2.Text.Trim() == "")
            {
                MessageBox.Show("Please Choose The Currency You Want To Convert To", "Information", MessageBoxButton.OK, MessageBoxImage.Information);
                combo2.Focus();
                return;
            }

            //kasus ketika mata uang di 'From' sama dengan mata uang di 'To'
            if (combo1.Text == combo2.Text)
            {
                ConvertedValue = double.Parse(textamount.Text);
                resulttext.Content = textamount.Text + " " + combo1.Text + "   " + ":" + "   " + ConvertedValue.ToString() + " " + combo2.Text;
            }

            //ketika semua sudah diisi, diproses menggunakan perhitungan di bawah
            else
            {
                ConvertedValue = (double.Parse(combo1.SelectedValue.ToString()) * double.Parse(textamount.Text)) / double.Parse(combo2.SelectedValue.ToString());
                resulttext.Content = textamount.Text + " " + combo1.Text + "   " + ":" + "   " + ConvertedValue.ToString() + " " + combo2.Text;
            }
        }
    }
}