using System.Collections.Generic;
using System.Linq;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

public class PvPModePopup : PopupBase
{
    [Header("Buttons")]
    [SerializeField] private Button twoPlayerBtn;
    [SerializeField] private Button threePlayerBtn;
    [SerializeField] private Button fourPlayerBtn;
    [SerializeField] private Button switchBtn;
    [SerializeField] private Button playBtn;
    [SerializeField] private Button closeBtn;

    [Header("Input Field")]
    [SerializeField] private TMP_InputField playerOneNameInput;
    [SerializeField] private TMP_InputField playerTwoNameInput;
    [SerializeField] private TMP_InputField playerThreeNameInput;
    [SerializeField] private TMP_InputField playerFourNameInput;

    [Header("References")]
    [SerializeField] private GameObject playerNameInputParent1;
    [SerializeField] private GameObject playerNameInputParent2;

    [Header("Placeholders")]
    [SerializeField] private TMP_Text playerOnePlaceholder;
    [SerializeField] private TMP_Text playerTwoPlaceholder;
    [SerializeField] private TMP_Text playerThreePlaceholder;
    [SerializeField] private TMP_Text playerFourPlaceholder;
    [SerializeField] private List<TMP_InputField> inputFields = new List<TMP_InputField>();

    [Header("Player Names")]
    private string playerOneName;
    private string playerTwoName;
    private string playerThreeName;
    private string playerFourName;

    private ScreenManager screenManager;
    private SoundManager soundManager;
    private GameModeHandler gameModeHandler;

    private int selectedPlayerCount;
    public int SelectedPlayerCount => selectedPlayerCount;

    [Header("Horizontal Rows (P1–P4)")]

    private int hiddenIndex = 0;

    private List<int> hiddenIndexes = new List<int>();
    private Dictionary<PlayerType, string> playerNameMap = new();


    private void OnEnable()
    {
        twoPlayerBtn.onClick.AddListener(OnClick_TwoPlayerBtn);
        threePlayerBtn.onClick.AddListener(OnClick_ThreePlayerBtn);
        fourPlayerBtn.onClick.AddListener(OnClick_FourPlayerBtn);

        playBtn.onClick.AddListener(OnClick_PlayButton);
        closeBtn.onClick.AddListener(OnClick_CloseButton);
        
        switchBtn.onClick.AddListener(OnClick_SwitchButton);
    }

    private void Start()
    {
        OnClick_FourPlayerBtn();
    }

    private void OnDisable()
    {
        twoPlayerBtn.onClick.RemoveListener(OnClick_TwoPlayerBtn);
        threePlayerBtn.onClick.RemoveListener(OnClick_ThreePlayerBtn);
        fourPlayerBtn.onClick.RemoveAllListeners();

        playBtn.onClick.RemoveListener(OnClick_PlayButton);
        closeBtn.onClick.RemoveListener(OnClick_CloseButton);

        switchBtn.onClick.RemoveListener(OnClick_SwitchButton);
    }

    private void OnClick_TwoPlayerBtn()
    {
        selectedPlayerCount = 2;

        OnPlayerCountsSwitched();

        switchBtn.gameObject.SetActive(true);
        playerNameInputParent2.SetActive(false);
    }

    private void OnClick_ThreePlayerBtn()
    {
        selectedPlayerCount = 3;

        OnPlayerCountsSwitched();

        switchBtn.gameObject.SetActive(true);
        playerNameInputParent1.SetActive(true);
        playerNameInputParent2.SetActive(true);

        UpdateInputFieldsVisibility();
    }

    private void OnClick_FourPlayerBtn()
    {
        selectedPlayerCount = 4;

        switchBtn.gameObject.SetActive(false);
        playerNameInputParent1.SetActive(true);
        playerNameInputParent2.SetActive(true);

        UpdateInputFieldsVisibility();
    }

    private void UpdateInputFieldsVisibility()
    {
        playerOneNameInput.transform.parent.gameObject.SetActive(true);
        playerTwoNameInput.transform.parent.gameObject.SetActive(selectedPlayerCount >= 3);
        playerThreeNameInput.transform.parent.gameObject.SetActive(selectedPlayerCount >= 2);
        playerFourNameInput.transform.parent.gameObject.SetActive(selectedPlayerCount >= 4);
    }

    private void OnClick_PlayButton()
    {
        playerNameMap.Clear();
        for (int idx = 0; idx < inputFields.Count; idx++)
        {
            PlayerType playerType = (PlayerType)idx;
            if (!inputFields[idx].transform.parent.gameObject.activeInHierarchy)
            {
                continue;
            }

            playerNameMap.Add(playerType, string.IsNullOrWhiteSpace(inputFields[idx].text) ? $"{playerType}" : inputFields[idx].text);
        }

        playerOneName = playerNameMap.GetValueOrDefault(PlayerType.Player1, Ludo_3D_Constants.Player1_Name);
        playerTwoName = playerNameMap.GetValueOrDefault(PlayerType.Player2, Ludo_3D_Constants.Player2_Name);
        playerThreeName = playerNameMap.GetValueOrDefault(PlayerType.Player3, Ludo_3D_Constants.Player3_Name);
        playerFourName = playerNameMap.GetValueOrDefault(PlayerType.Player4, Ludo_3D_Constants.Player4_Name);

        soundManager = soundManager == null ? InterfaceManager.Instance?.GetInterfaceInstance<SoundManager>() : soundManager;
        soundManager?.PlayGameSoundClip(SoundType.ButtonClick);

        Debug.Log($"Starting PVP Mode with {selectedPlayerCount} players:");

        popupManager.HidePopup(popupType);

        gameModeHandler = gameModeHandler == null ? InterfaceManager.Instance.GetInterfaceInstance<GameModeHandler>() : gameModeHandler;
        gameModeHandler.InitPVPModeData(playerNameMap.Keys.ToList(), playerNameMap.Values.ToList());
    }

    private void OnClick_SwitchButton()
    {
        hiddenIndexes.Clear();
        if (SelectedPlayerCount == 2)
        {
            if (playerNameInputParent1.activeInHierarchy)
            {
                playerNameInputParent1.SetActive(false);
                playerNameInputParent2.SetActive(true);

                playerOnePlaceholder.text = "Player 1";
                playerThreePlaceholder.text = "Player 2";

                hiddenIndexes.Add((int)PlayerType.Player1);
                hiddenIndexes.Add((int)PlayerType.Player3);
            }
            else
            {
                playerNameInputParent1.SetActive(true);
                playerNameInputParent2.SetActive(false);
                playerTwoPlaceholder.text = "Player 1";
                playerFourPlaceholder.text = "Player 2";

                hiddenIndexes.Add((int)PlayerType.Player2);
                hiddenIndexes.Add((int)PlayerType.Player4);
            }
        }
        else if (SelectedPlayerCount == 3)
        {
            hiddenIndex = (hiddenIndex + 1) % inputFields.Count;
            hiddenIndexes.Add(hiddenIndex);
        }

        UpdateRows();
    }

    private void OnPlayerCountsSwitched()
    {
        hiddenIndexes.Clear();
        if (SelectedPlayerCount == 2)
        {
            if (playerNameInputParent1.activeInHierarchy)
            {
                playerOnePlaceholder.text = "Player 1";
                playerThreePlaceholder.text = "Player 2";

                hiddenIndexes.Add((int)PlayerType.Player2);
                hiddenIndexes.Add((int)PlayerType.Player4);
            }
            else if (playerNameInputParent2.activeInHierarchy)
            {
                playerTwoPlaceholder.text = "Player 1";
                playerFourPlaceholder.text = "Player 2";

                hiddenIndexes.Add((int)PlayerType.Player1);
                hiddenIndexes.Add((int)PlayerType.Player3);
            }
        }
        else if (SelectedPlayerCount == 3)
        {
            hiddenIndex = (hiddenIndex + 1) % inputFields.Count;
            hiddenIndexes.Add(hiddenIndex);
        }

        UpdateRows();
    }

    private void UpdateRows()
    {
        int visiblePlayerIndex = 1;

        for (int i = 0; i < inputFields.Count; i++)
        {
            bool isHidden = hiddenIndexes.Contains(i);
            inputFields[i].transform.parent.gameObject.SetActive(!isHidden);

            if (!isHidden)
            {
                TMP_Text placeholder = inputFields[i].placeholder as TMP_Text;
                if (placeholder != null)
                {
                    placeholder.text = $"Player {visiblePlayerIndex}";
                    visiblePlayerIndex++;
                }
            }
        }
    }

    private void OnClick_CloseButton()
    {
        screenManager = screenManager == null ? InterfaceManager.Instance?.GetInterfaceInstance<ScreenManager>() : screenManager;
        screenManager.ShowScreen(ScreenType.MenuScreen);

        soundManager = soundManager == null ? InterfaceManager.Instance?.GetInterfaceInstance<SoundManager>() : soundManager;
        soundManager?.PlayGameSoundClip(SoundType.ButtonClick);

        Hide();
    }
}