using MySql.Data.MySqlClient;
using Newtonsoft.Json;
using Support.Crypto;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Support.Controls
{
    public partial class Settings : UserControl
    {
        private Models.Appsettings Appsettings = null;
        private Main _MainForm = null;

        public Settings()
        {
            InitializeComponent();

            this.Appsettings = new Models.Appsettings();

            txtDatabaseConnectionString_KeyUp(null, null);
        }

        public Settings(Models.Appsettings appsettings, Main mainForm)
        {
            InitializeComponent();
            this.Appsettings = appsettings;
            this._MainForm = mainForm;

            if(this.Appsettings != null)
            {
                lblStatus.Text = "";
                txtServiceInsideURL.Text = this.Appsettings.ServiceInsideURL;
                txtServiceOutsideURL.Text = this.Appsettings.ServiceOutsideURL;
                txtPrivateDirectoryPath.Text = this.Appsettings.PrivateDirectory;
                txtPublicDirectoryPath.Text = this.Appsettings.PublicDirectory;
                txtDatabaseConnectionString.Text = this.Appsettings.DatabaseConnectionString;
            }
            else
            {
                this.Appsettings = new Models.Appsettings();
            }

            txtDatabaseConnectionString_KeyUp(null, null);
        }

        private void btnEmpy_Click(object sender, EventArgs e)
        {
            try
            {
                lblStatus.Text = "";

                string constring = txtDatabaseConnectionString.Text;

                string decrypted = AES.Decrypt(constring);

                if (!string.IsNullOrEmpty(decrypted))
                {
                    constring = decrypted;
                }

                Database database = new Database(constring);

                using (MySqlConnection client = database.CreateConnection())
                {
                    client.Open();

                    MySqlCommand cmd = client.CreateCommand();

                    cmd.CommandText = "select maintenance from config c limit 1";
                    
                    MySqlDataReader reader = cmd.ExecuteReader();
                    
                    if(reader.Read())
                    {
                        int maintenance = 0;
                        string str_maintenance = reader["maintenance"].ToString();

                        Int32.TryParse(str_maintenance, out maintenance);

                        if (maintenance == 1)
                        {
                            maintenance = 0;
                        }
                        else
                        {
                            maintenance = 1;
                        }

                        if(!reader.IsClosed)
                        {
                            reader.Close();
                        }

                        cmd.CommandText = "update config set maintenance = @maintenance";

                        cmd.Parameters.Clear();
                        cmd.Parameters.Add(new MySqlParameter("maintenance", maintenance));

                        cmd.ExecuteNonQuery();

                        client.Close();

                        if (maintenance == 1)
                        {
                            lblStatus.Text = "Der Wartungsmodus wurde aktiviert";
                            btnMaintenanceWork.Text = "Wartungsmodus deaktivieren";
                            btnMaintenanceWork.BackColor = Color.Red;
                            btnMaintenanceWork.ForeColor = Color.White;
                        }
                        else
                        {
                            lblStatus.Text = "Der Wartungsmodus wurde deaktiviert";
                            btnMaintenanceWork.Text = "Wartungsmodus aktivieren";
                            btnMaintenanceWork.BackColor = Color.Silver;
                            btnMaintenanceWork.ForeColor = Color.Black;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                lblStatus.Text = ex.Message;
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            try
            {
                if (string.IsNullOrEmpty(txtServiceInsideURL.Text))
                {
                    lblStatus.Text = "Bitte geben Sie die URL vom ServiceInside ein";
                }
                else if (string.IsNullOrEmpty(txtServiceOutsideURL.Text))
                {
                    lblStatus.Text = "Bitte geben Sie die URL vom ServiceOutside ein";
                }
                else if (string.IsNullOrEmpty(txtPrivateDirectoryPath.Text))
                {
                    lblStatus.Text = "Bitte wählen Sie den Pfad zum Verzeichnis \"private\" aus";
                }
                else if (string.IsNullOrEmpty(txtPublicDirectoryPath.Text))
                {
                    lblStatus.Text = "Bitte wählen Sie den Pfad zum Verzeichnis \"public\" aus";
                }
                else if (string.IsNullOrEmpty(txtDatabaseConnectionString.Text))
                {
                    lblStatus.Text = "Bitte geben Sie die Datenbank-Verbindungszeichenfolge ein";
                }
                else
                {
                    this.Appsettings.ServiceInsideURL = txtServiceInsideURL.Text;
                    this.Appsettings.ServiceOutsideURL = txtServiceOutsideURL.Text;
                    this.Appsettings.PrivateDirectory = txtPrivateDirectoryPath.Text;
                    this.Appsettings.PublicDirectory = txtPublicDirectoryPath.Text;
                    this.Appsettings.DatabaseConnectionString = txtDatabaseConnectionString.Text;

                    if (!string.IsNullOrEmpty(txtNewPassword.Text))
                    {
                        string key = txtCurrentPassword.Text;

                        if (!string.IsNullOrEmpty(key))
                        {
                            if (AES.Decrypt(this.Appsettings.SupportPassword, AES.GetKey(key)) == "Support_" + key)
                            {
                                this.Appsettings.SupportPassword = AES.Encrypt("Support_" + txtNewPassword.Text, AES.GetKey(txtNewPassword.Text));

                                if (this.Appsettings.Save())
                                {
                                    lblStatus.Text = "Die Einstellungen wurden erfolgreich gespeichert";
                                    this._MainForm.Initialize();
                                }
                                else
                                {
                                    lblStatus.Text = "Die Einstellungen konnten nicht gespeichert werden";
                                }
                            }
                            else
                            {
                                lblStatus.Text = "Das aktuelle Support-Passwort ist ungültig";
                            }
                        }
                        else
                        {
                            lblStatus.Text = "Bitte geben Sie das aktuelle Support-Passwort ein";
                        }
                    }
                    else
                    {
                        if (this.Appsettings.Save())
                        {
                            lblStatus.Text = "Die Einstellungen wurden erfolgreich gespeichert";
                            this._MainForm.Initialize();
                        }
                        else
                        {
                            lblStatus.Text = "Die Einstellungen konnten nicht gespeichert werden";
                        }
                    } 
                }
            }
            catch (Exception ex)
            {
                lblStatus.Text = ex.Message;
            }
        }

        private void btnPrivateDirectorySelector_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();

            if(folderBrowserDialog.ShowDialog() == DialogResult.OK)
            {
                txtPrivateDirectoryPath.Text = folderBrowserDialog.SelectedPath;
            }
        }

        private void btnPublicDirectorySelector_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();

            if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
            {
                txtPublicDirectoryPath.Text = folderBrowserDialog.SelectedPath;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                lblStatus.Text = "";

                string constring = txtDatabaseConnectionString.Text;

                string decrypted = AES.Decrypt(constring);

                if(!string.IsNullOrEmpty(decrypted))
                {
                    constring = decrypted;
                }

                Database database = new Database(constring);

                using (MySqlConnection client = database.CreateConnection())
                {
                    client.Open();

                    MySqlCommand cmd = client.CreateCommand();

                    cmd.CommandText = "select * from config c limit 1";
                    MySqlDataReader reader = cmd.ExecuteReader();
                    client.Close();

                    lblStatus.Text = "Verbindung erfolgreich";
                }
            }
            catch (Exception ex)
            {
                lblStatus.Text = ex.Message;
            }
        }

        private void txtDatabaseConnectionString_KeyUp(object sender, KeyEventArgs e)
        {
            if(!string.IsNullOrEmpty(txtDatabaseConnectionString.Text))
            {
                btnMaintenanceWork.Visible = true;
                btnDatabaseConnectionCheck.Visible = true;
            }
            else
            {
                btnMaintenanceWork.Visible = false;
                btnDatabaseConnectionCheck.Visible = false;
            }
        }
    }
}