using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Data.SQLite;

namespace SmartDeviceProject1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private string dbName = "test.db";
        private string dbPassword = "testPa55word";
        private SQLiteConnection cnn;

        private void Form1_Load(object sender, EventArgs e)
        {
            if (!File.Exists(dbName))
            {
                // Opens an unencrypted database
                SQLiteConnection.CreateFile(dbName);
                cnn = new SQLiteConnection("Data Source=|DataDirectory|" + dbName);
                cnn.Open();

                // Create initial table structure
                StringBuilder query = new StringBuilder();
                query.Append("CREATE TABLE \"test\" (");
                query.Append("\"ID\" INTEGER, ");
                query.Append("\"TEXT\" TEXT");
                query.Append(");");
                using (SQLiteCommand cmd = new SQLiteCommand(query.ToString(), cnn))
                {
                    cmd.ExecuteNonQuery();
                }

                // Encrypts the database
                cnn.ChangePassword(dbPassword);
            }
            else
            {
                // Opens an encrypted database
                cnn = new SQLiteConnection("Data Source=|DataDirectory|" + dbName + ";Password=" + dbPassword);
                cnn.Open();
            }
        }

        private void addButton_Click(object sender, EventArgs e)
        {
            using (SQLiteCommand cmd = new SQLiteCommand("INSERT INTO \"test\" VALUES("+ int.Parse(id.Value.ToString()) +", \"" + text.ToString() + "\")", cnn))
            {
                cmd.ExecuteNonQuery();
            }
        }

        private void reloadDataButton_Click(object sender, EventArgs e)
        {
            using (SQLiteCommand cmd = new SQLiteCommand("SELECT * FROM \"test\"", cnn))
            {
                using (SQLiteDataReader sdr = cmd.ExecuteReader())
                {
                    while (sdr.Read())
                    {
                        listBox.Items.Add(sdr.GetValue(0) + " - " + sdr.GetValue(1));
                    }
                }
            }
        }
    }
}