using System;
using System.IO;
using System.Security.Principal;
using System.Xml;

namespace AdobeTrialAuto_Extender {
    class Program {

        static private XmlDocument changeTrialSerial(String path) {
            //Loads and modifies the xml (loops through, finds the TrialSerialNumber, and adds 100 to it, to renew the trial).
            XmlDocument applicationXml = new XmlDocument();
            applicationXml.Load(path);
            foreach (XmlNode testTrial in applicationXml.GetElementsByTagName("Data")) {
                if (testTrial.Attributes.GetNamedItem("key").Value.Equals("TrialSerialNumber")) {
                    Console.WriteLine("Initial TrialSerialNumber: " + testTrial.InnerText);
                    testTrial.InnerText = (Decimal.Parse(testTrial.InnerText) + 100).ToString("########################");
                    Console.WriteLine("New TrialSerialNumber: " + Decimal.Parse(testTrial.InnerText).ToString("########################"));
                    return applicationXml;
                }
            }
            return null;
        }

        static void Main(string[] args) {
            //Checks if the program has somehow not been run as administrator, exits if it has not.
            if (!new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator)) {
                Console.WriteLine("Program has not been run as adminstrator, press enter to quit, then run again as an administrator.");
                Console.ReadLine();
                Environment.Exit(5);
            }

            //Non-Interactive Mode
            if (args.Length == 1) {
                Console.WriteLine("Non-Interactive Mode");

                //Displays legal warnings.
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("WARNING -- USE OF THIS PROGRAM VIOLATES ADOBE'S TERMS OF USE.");
                Console.WriteLine("USING THIS PROGRAM MAY LAND YOU IN LEGAL TROUBLE, FOR WHICH THE SOFTWARE'S AUTHOR ACCEPTS NO RESPONSIBILITY FOR.");
                Console.WriteLine("THIS SOFTWARE COMES WITHOUT WARRANTY OF ANY KIND, EVEN THE IMPLIED WARRANTY OF FITNESS FOR PURPOSE.");
                Console.ForegroundColor = ConsoleColor.White;

                XmlDocument toSave = changeTrialSerial(args[0]);

                //Saves then exits.
                toSave.Save(args[0]);
                Console.WriteLine("Saved successfully.");
                Environment.Exit(0);
            }
            //Displays legal warnings.
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("WARNING -- USE OF THIS PROGRAM VIOLATES ADOBE'S TERMS OF USE.");
            Console.WriteLine("USING THIS PROGRAM MAY LAND YOU IN LEGAL TROUBLE, FOR WHICH THE SOFTWARE'S AUTHOR ACCEPTS NO RESPONSIBILITY FOR.");
            Console.WriteLine("THIS SOFTWARE COMES WITHOUT WARRANTY OF ANY KIND, EVEN THE IMPLIED WARRANTY OF FITNESS FOR PURPOSE.");


            //Asks for the root directory for Adobe programs.
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("Please enter your Adobe directory (e.g. C:\\Program Files\\Adobe\\):");
            String AdobeDir = Console.ReadLine();
            //Gets the Adobe programs present, and asks the user which one they would like to modify.
            String[] AdobePrograms = Directory.GetDirectories(AdobeDir);
            int numProgram = 0;
            foreach (String program in AdobePrograms) {
                Console.WriteLine("[" + numProgram + "] " + program.Substring(AdobeDir.Length));
                numProgram++;
            }
            Console.WriteLine("Select a number to extend its trial.");
            int choice = int.Parse(Console.ReadLine());

            XmlDocument newXml = changeTrialSerial(AdobePrograms[choice] + "\\AMT\\application.xml");


            //Saves, waits for a key, then exits.
            newXml.Save(AdobePrograms[choice] + "\\AMT\\application.xml");
            Console.WriteLine("Saved successfully. Press any key to exit.");
            Console.ReadKey();
            Environment.Exit(0);
        }
    }
}