using UnityEngine;

public class Hacker : MonoBehaviour {

    // Game configuration data
    const string menuHint = "You may type menu at any time.";
    string[] level1Passwords = { "books", "aisle", "shelf", "password", "font", "borrow" };
    string[] level2Passwords = { "prisoner", "handcuffs", "holster", "uniform", "arrest" };
    string[] level3Passwords = { "starfield", "telescope", "environment", "exploration", "astronauts" };

    // Game state
    int level;
    enum Screen { MainMenu, Password, Win };
    Screen currentScreen;
    string password;

    // Use this for initialization
    void Start ()
    {
        ShowMainMenu ();
    }

    void ShowMainMenu ()
    {
        currentScreen = Screen.MainMenu;
        Terminal.ClearScreen();
        Terminal.WriteLine("What would you like to hack into?");
        Terminal.WriteLine("Press 1 for the local library");
        Terminal.WriteLine("Press 2 for the police station");
        Terminal.WriteLine("Press 3 for NASA!");
        Terminal.WriteLine("Enter your selection:");
    }

    void OnUserInput(string input)
    {
        if (input == "menu") // we can always go direct to main menu
        {
            ShowMainMenu();
        }
        else if (currentScreen == Screen.MainMenu)
        {
            RunMainMenu(input);
        }
        else if (currentScreen == Screen.Password)
        {
            CheckPassword(input);
        }
    }

    void RunMainMenu(string input)
    {
        bool isValidLevelNumber = (input == "1" || input == "2" || input == "3");
        if (isValidLevelNumber)
        {
            level = int.Parse(input);
            AskForPassword();
        }
        else if (input == "007") // easter egg
        {
            Terminal.WriteLine("Please select a level Mr Bond!");
        }
        else
        {
            Terminal.WriteLine("Please choose a valid level");
            Terminal.WriteLine(menuHint);
        }
    }

    void AskForPassword()
    {
        currentScreen = Screen.Password;
        Terminal.WriteLine("We are connecting you to " + level);
        Terminal.WriteLine("Enter password. Hint: " + password.Anagram());
        PasswordGenerator();
    }

    void PasswordGenerator()
    {
        switch (level)
        {
            case 1:
                int index = Random.Range(0, level1Passwords.Length);
                password = level1Passwords[index];
                break;

            case 2:
                int index2 = Random.Range(0, level2Passwords.Length);
                password = level2Passwords[index2];
                break;

            case 3:
                int index3 = Random.Range(0, level3Passwords.Length);
                password = level3Passwords[index3];
                break;


            default:
                Debug.Log("Invalid Level boi");  //In case, if I will mess up with code too much
                break;
        }
    }

    void CheckPassword(string input)
    {
        if (input == password)
        {
            DisplayWinScreen();
        }
        else
        {
            AskForPassword();
        }
    }

    void DisplayWinScreen()
    {
        currentScreen = Screen.Win;
        Terminal.ClearScreen();
        ShowLevelReward();
        Terminal.WriteLine(menuHint);
    }

    void ShowLevelReward()
    {
        switch (level)
        {
            case 1:
                Terminal.WriteLine("Have a book...");
                Terminal.WriteLine(@"
    _______
   /      //
  /      //
 /_____ //
(______(/
"
                );
                break;
            case 2:
                Terminal.WriteLine("You got the prison key!");
                Terminal.WriteLine(@"
 __
/0 \_______
\__/-=' = '
"
                );
                Terminal.WriteLine("Play again for a greater challenge.");
                break;
            case 3:
                Terminal.WriteLine(@"
 _ __   __ _ ___  __ _
| '_ \ / _` / __|/ _` |
| | | | (_| \__ \ (_| |
|_| |_|\__,_|___)\__,_|
"
                );
                Terminal.WriteLine("Welcome to NASA's internal system!");
                break;
            default:
                Debug.LogError("Invalid level reached");
                break;
        }
    }
}