using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Text.Json;
using System.Windows.Forms;


namespace it_projekt
{
    public partial class Form1 : Form
    {

        private Database db = null;
        public Form1()
        {
            InitializeComponent();
            this.exportBtn.Enabled = false;
        }


        private void exportBtn_Click(object sender, EventArgs e)
        {
            if (jsonRBtn.Checked)
                exportJSON();
            else
                exportXML();
        }

        private void loginBtn_Click(object sender, EventArgs e)
        {
            LoadUsersFromTable(this.userTxt.Text, this.passTxt.Text);

        }



        public void LoadUsersFromTable(string user, string password)
        {
            db = Database.getDatabase(user, password);
            if (db.Persons == null)
            {
                MessageBox.Show("Connection to Database failed! \nPlease Try again.", "Database Error!");
            }
            else {
                foreach (Person person in db.Persons)
                {
                    this.dataGrid.Rows.Add(person.Id, person.Firstname, person.Lastname, person.department_short, person.department_long, person.CreationDate, false);
                }
            }
        }

        private void dataGrid_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            
        }

        private void exportJSON()
        {
            Stream myStream;
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();

            saveFileDialog1.Filter = "All files (*.*)|*.*|json files (*.json)|*.json";
            saveFileDialog1.FilterIndex = 2;
            saveFileDialog1.RestoreDirectory = true;
            saveFileDialog1.FileName = "benutzer.json";

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                if ((myStream = saveFileDialog1.OpenFile()) != null)
                {
                    List<Person> markedUsers = new List<Person>();
                    foreach (DataGridViewRow row in dataGrid.Rows)
                    {
                        if (row.Cells[4].Value != null)
                        {
                            if (row.Cells[4].Value.ToString() == "True")
                            {
                                markedUsers.Add(db.Persons.Find(person => person.Id == row.Cells[0].Value.ToString()));
                            }
                        }
                    }
                    string json = JsonSerializer.Serialize(markedUsers);
                    StreamWriter sw = new StreamWriter(myStream);
                    sw.Write(json);
                    sw.Flush();
                    sw.Close();
                    myStream.Close();
                }
            }
        }

        private void exportXML()
        {
            Stream myStream;
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();

            saveFileDialog1.Filter = "All files (*.*)|*.*|xml files (*.xml)|*.xml";
            saveFileDialog1.FilterIndex = 2;
            saveFileDialog1.RestoreDirectory = true;
            saveFileDialog1.FileName = "benutzer.xml";

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                if ((myStream = saveFileDialog1.OpenFile()) != null)
                {
                    List<Person> markedUsers = new List<Person>();
                    foreach (DataGridViewRow row in dataGrid.Rows)
                    {
                        if (row.Cells[4].Value != null)
                        {
                            if (row.Cells[4].Value.ToString() == "True")
                            {
                                markedUsers.Add(db.Persons.Find(person => person.Id == row.Cells[0].Value.ToString()));
                            }
                        }
                    }
                    StreamWriter sw = new StreamWriter(myStream);
                    var writer = new System.Xml.Serialization.XmlSerializer(typeof(List<Person>));
                    writer.Serialize(sw, markedUsers);
                    sw.Flush();
                    sw.Close();
                    myStream.Close();
                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void jsonRBtn_CheckedChanged(object sender, EventArgs e)
        {

        }

        private void xmlRBtn_CheckedChanged(object sender, EventArgs e)
        {
            
        }
    }
}