using System.Collections;
using System.Collections.Generic;
using System.Text;// For Stringbuilder
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;


public class GameManager : MonoBehaviour {
    //list that will hold all of the words that are avaliable to be guessed
    public List<Word> wordList;
    //this is the word that is chosen to be guessed for
    public string wordToGuess;
    //this is whats actually displayed on the screen
    public Text wordDisplay;
    //what the player has guessed
    public string guess;
    //where the guess comes from
    public InputField inputText;
    //a list of all the letters that have already been used
    public List<string> usedLetterList;
    //where the used letter list will display
    public Text usedLetterDisplay;
    //what category the guessed word is in
    public Text categoryTxt;
    //the word that is partially guessed
    private string currentWord;
    //how many words there are
    public int wordCount;
    //number of lives tha player has left
    public int lives = 3;
    //the button in the game that allows the game to be replayed
    public GameObject playAgainButton;
    //boolean that checks if the game is over
    public bool gameOver = false;
    //button that can be pressed to make the hint text show
    public GameObject hintButton;
    //the actual hint text
    public Text hintText;
    //a button that will quit the game when called
    public GameObject quitGameButton;
    //number of points that the player has
    public int points;
    //how the points will be displayed
    public Text currentScore;
    //how the lives remaining will be displayed
    public Text currentLives;
    //the final score the player has, this is used so the final score may be displayed more prominantly
    public Text finalScore;
    //checks to see if when the game ends if the player won
    public bool winGame;
    //the time remaining
    //only used in timed mode
    public Timer time;
    //a string of allowed charachter, this makes it so that non alphabet charachters will not be counted against the player
    private string alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    // Use this for initialization, it will reset all of the variables and give the player the opportunity to enter the game or exit the game
    //will also pick a word to be tested for
    void Start ()
    {
        winGame = false;
        HideHint();
        HideScore();
        playAgainButton.SetActive(false);
        PickAWord();
        inputText.ActivateInputField();
        quitGameButton.SetActive(false);
        currentLives.text = "Lives: " + lives;
        currentScore.text = "Score: " + points;



    }
    //makes it so that the cursor is always in the input field so the player may always type
    private void Update()
    {
        inputText.ActivateInputField();
    }

    //makes it so that the word is hidden to the player
    void MaskWord(string input, char target)
    {
        StringBuilder sb = new StringBuilder(wordToGuess.Length);
        for(int i = 0; i < wordToGuess.Length; i++)
        {
            sb.Append(target);
        }
        currentWord = sb.ToString();
        //Update word to text on screen
        wordDisplay.text = currentWord;
    }
    //turns the *'s to letters as the letters are guessed
    void UnMaskWord(string input, char target)
    {
        //input.ToLower();
        StringBuilder sb = new StringBuilder(wordToGuess.Length);
        for (int i = 0; i < wordToGuess.Length; i++)
        {
            if(input.ToLower() == wordToGuess[i].ToString().ToLower())
            {
                sb.Append(target);
                wordCount++;
            }
            else
            {
                sb.Append(currentWord[i]);
            }
        }
        currentWord = sb.ToString();
        //Update word to text on screen
        currentWord = currentWord.Substring(0, 1).ToUpper() + currentWord.Substring(1).ToLower();
        wordDisplay.text = currentWord;
        //What condition can be checked to see if we've won or not?
        if(wordCount == wordToGuess.Length)
        {
            winGame = true;
            EndGame();
        }
    }
    //this picks the word to be guessed by the player
    void PickAWord()
    {
        int selectedWord = Random.Range(0, wordList.Count-1);
        Debug.Log("selectedWord int : " + selectedWord);
        wordToGuess = wordList[selectedWord].word;
        categoryTxt.text = wordList[selectedWord].category;
        hintText.text = wordList[selectedWord].hint;
        //wordList.Remove(wordList[selectedWord]);
        currentWord = wordToGuess;
        MaskWord(currentWord, '*');
    }
    //this compares the letter the player guesses with the word they are guessing for
    public void LetterGuess()
    {
        if(gameOver == false)
        {
            if (inputText.text != string.Empty)
            {
                guess = inputText.text.ToLower();
                AddLetterGuess();
            }
        }

    }
    //this checks if the letter guessed is in the word and if it is it will unmask the guessed letter
    //otherwise it will subtract a life
    void CheckWordForLetter()
    {
        if (wordToGuess.Contains(guess))
        {
            //Display letter
            UnMaskWord(guess, guess[0]);
            //Update word to text on screen
            //wordDisplay.text = wordToGuess;
        }
        else
        {
            lives--;
            currentLives.text = "Lives: " + lives;
            if(lives == 0)
            {
                EndGame();
            }
        }
    }
    //this tests the letters that are being used to see if theyre letters and if theyre actually in the word
    void AddLetterGuess()
    {
        if (!usedLetterList.Contains(guess) && (alphabet.Contains(guess)))
        {
            CheckWordForLetter();
            usedLetterList.Add(guess);
            string tempText = "";
            foreach (string str in usedLetterList)
            {
                tempText += str;
            }
            usedLetterDisplay.text = tempText;
        }
        ResetGuess();
    }
    //this will make it so that the player can enter a new guess
    void ResetGuess()
    {
        guess = string.Empty;
        inputText.text = string.Empty;
        inputText.ActivateInputField();
    }
    //this ends the game and makes it so that if they win they get a new word and if they lose the game ends
    public void EndGame()
    {
        if (winGame == true)
        {
            points++;
            //this will only be entered if they are playing the timed game mode
            if ((SceneManager.GetActiveScene()).name == "Timed Game Mode")
            {
                Invoke("Time.ResetTime()", 3);
            }
            currentScore.text = "Score: " + points;
            Debug.Log("User won");
            gameOver = true;
            wordDisplay.fontSize = 48;
            Invoke("ResetGame", 3);
            //this line is in here twice and it sholdnt be i think
            //Invoke("Time.ResetTime()", 3);
            inputText.gameObject.SetActive(false);
        }
        //this is if the player lost
        else
        {
            DisplayScore();
            categoryTxt.gameObject.SetActive(false);
            playAgainButton.SetActive(true);
            quitGameButton.SetActive(true);
            Debug.Log("User lost");
            gameOver = true;
            inputText.gameObject.SetActive(false);
            ResetScore();
            //should this line be here?
        }
    }

    //this will reset all of the used variables and give them the options to play again or quit
    public void ResetGame()
    {
        categoryTxt.gameObject.SetActive(true);
        playAgainButton.SetActive(false);
        quitGameButton.SetActive(false);
        winGame = false;
        gameOver = false;
        inputText.gameObject.SetActive(true);
        wordDisplay.fontSize = 36;
        lives = 3;
        if ((SceneManager.GetActiveScene()).name == "Timed Game Mode")
        {
            Debug.Log("it entered");
            time.ResetTime();
        }
        currentLives.text = "Lives: " + lives;
        usedLetterList.Clear();
        usedLetterDisplay.text = string.Empty;
        ResetGuess();
        wordCount = 0;
        HideHint();
        PickAWord();

    }
    //lets the player see a hint
    public void DisplayHint()
    {
        hintText.gameObject.SetActive(true);
        hintButton.SetActive(false);
    }
    //hides the hint
    public void HideHint()
    {
        hintText.gameObject.SetActive(false);
        hintButton.SetActive(true);
    }
    //shows the score the player has
    public void DisplayScore()
    {
        finalScore.gameObject.SetActive(true);
        finalScore.text = ("Final Score: " + points);
    }
    //hides the players score
    public void HideScore()
    {
        finalScore.gameObject.SetActive(false);
    }
    //when the player loses their score will reset
    public void ResetScore()
    {
        points = 0;

    }
}