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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using System.Xml.Linq;

using System.Windows.Forms;

namespace SWAT_USB_App

{

    class SettingsParser

    {

        private static string settingsFileLocation = Initialization.pathToSWATDrive + "USBSettings.xml";

        private static XElement Settings;

        public static bool settingsFileExist()

        {

            if (File.Exists(Initialization.pathToSWATDrive + "USBSettings.xml"))

                return true;

            else

                return false;

        }

        public static void readSettingsFile()

        {

            try

            {

                DebugText.appendText("Parsing USBSettings.xml");

                // Clears the lists for software and drivers

                form_Software.softwareList.Clear();

                form_Drivers.driverList.Clear();

                Settings = XElement.Load(settingsFileLocation);

                // Reads the list of applications from the USBSettings.xml file into form_Software.softwareList

                DebugText.appendText("Parsing list of applications into List softwareList");

                foreach (XElement elem in Settings.Elements("Applications").Elements("Application"))

                {

                    DebugText.appendText("Adding application " + elem.Element("Name").Value + " into softwareList");

                    form_Software.softwareList.Add(elem.Element("Name").Value);

                }

                // Alternate way of reading list of applications

                //IEnumerable<XElement> app =

                //    from el in Settings.Elements("Applications").Elements("Application")

                //    select el;

                //foreach (XElement el in app)

                //{

                //    DebugText.appendText("Adding application " + el.Element("Name").Value + " into softwareList");

                //    form_Software.softwareList.Add(el.Element("Name").Value);

                //}

                // Reads the list of drivers from the USBSettings.xml file into form_Drivers.driverList

                DebugText.appendText("Parsing list of drivers into List driverList");

                foreach (XElement elem in Settings.Elements("Drivers").Elements("Driver"))

                {

                    DebugText.appendText("Adding driver " + elem.Element("Name").Value + " into driverList");

                    form_Drivers.driverList.Add(elem.Element("Name").Value);

                }

                // Alternate way of reading list of drivers

                //IEnumerable<XElement> driv =

                //    from el in Settings.Elements("Drivers").Elements("Driver")

                //    select el;

                //foreach (XElement el in driv)

                //{

                //    DebugText.appendText("Adding driver " + el.Element("Name").Value + " into driverList");

                //    form_Drivers.driverList.Add(el.Element("Name").Value);

                //}

            }

            catch (Exception e)

            {

                DebugText.appendText("Exception Thrown: " + e.ToString());

                MessageBox.Show(e.ToString());

            }

        }

        public static bool isDefaultCheck(string applicationName)

        {

            try

            {

                // Checks if passed application name is marked as default

                bool isDefault = false;

                foreach (XElement elem in Settings.Elements("Applications").Elements("Application"))

                {

                    if (elem.Element("Name").Value == applicationName)

                        if (elem.Element("Default").Value.ToLower() == "yes")

                        {

                            isDefault = true;

                            break;

                        }

                }

                // Alternate method of finding if default is marked

                //IEnumerable<XElement> def =

                //    from el in Settings.Elements("Applications").Elements("Application")

                //    where (string)el.Element("Name") == applicationName

                //    select el;

                //if ((string)def.First().Element("Default").Value.ToLower() == "yes")

                //    isDefault = true;

                return isDefault;

            }

            catch (Exception e)

            {

                DebugText.appendText("Exception Thrown: " + e.ToString());

                MessageBox.Show(e.ToString());

                return false;

            }

        }

        public static string[] getSetupLocation(string fileName)

        {

            try

            {

                // Pulls the location and arguments for the specified application/driver from USBSettings.xml

                DebugText.appendText("Getting setup locations for application " + fileName);

                IEnumerable<XElement> loc =

                    from el in Settings.Elements("Applications").Elements("Application")

                    where (string)el.Element("Name") == fileName

                    select el;

                // Checks drivers if fileName is not found in Applications

                if (loc.Count() == 0)

                {

                    loc =

                        from el in Settings.Elements("Drivers").Elements("Driver")

                        where (string)el.Element("Name") == fileName

                        select el;

                }

                // Creates a string array holding alternating lines of setup locations and arguments for that setup file

                string[] appSetupFile = new string[loc.Elements("Setup").Elements("Location").Count() * 2];

                int counter = 0;

                foreach (XElement elem in loc.Elements("Setup").Elements("Location"))

                {

                    DebugText.appendText("Setup location for " + fileName + " is at " + (string)elem.Value + " with arguments " + (string)elem.Attribute("Args"));

                    appSetupFile[counter] = (string)elem.Value;

                    appSetupFile[counter + 1] = (string)elem.Attribute("Args");

                    counter += 2;

                }

                return appSetupFile;

            }

            catch (Exception e)

            {

                DebugText.appendText("Exception Thrown: " + e.ToString());

                MessageBox.Show(e.ToString());

                return null;

            }

        }

    }

}