using System.Collections.Generic;
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("Player Names")]
    private string playerOneName;
    private string playerTwoName;
    private string playerThreeName;
    private string playerFourName;

    [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;

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

    private int selectedPlayerCount;
    public int SelectedPlayerCount => selectedPlayerCount;

    [Header("Horizontal Rows (P1–P4)")]
    public List<GameObject> rows;
    private int hiddenIndex = 0;

    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_PlayBtn);
        closeBtn.onClick.AddListener(OnClick_CloseBtn);
        switchBtn.onClick.AddListener(OnClick_SwitchBtn);
    }

    private void OnDisable()
    {
        twoPlayerBtn.onClick.RemoveListener(OnClick_TwoPlayerBtn);
        threePlayerBtn.onClick.RemoveListener(OnClick_ThreePlayerBtn);
        fourPlayerBtn.onClick.RemoveAllListeners();
        playBtn.onClick.RemoveListener(OnClick_PlayBtn);
        closeBtn.onClick.RemoveListener(OnClick_CloseBtn);
        switchBtn.onClick.RemoveListener(OnClick_SwitchBtn);
    }

    private void OnClick_TwoPlayerBtn()
    {
        switchBtn.gameObject.SetActive(true);
        selectedPlayerCount = 2;
        playerNameInputParent2.SetActive(false);
    }

    private void OnClick_ThreePlayerBtn()
    {
        switchBtn.gameObject.SetActive(true);
        selectedPlayerCount = 3;
        playerNameInputParent1.SetActive(true);
        playerNameInputParent2.SetActive(true);
        UpdateInputFieldsVisibility();
    }

    private void OnClick_FourPlayerBtn()
    {
        switchBtn.gameObject.SetActive(false);
        selectedPlayerCount = 4;
        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_PlayBtn()
    {
        int logicalIndex = 0;

        foreach (GameObject row in rows)
        {
            if (!row.activeSelf)
                continue;

            TMP_InputField input = row.GetComponentInChildren<TMP_InputField>();

            PlayerType playerType = (PlayerType)logicalIndex;

            string playerName = string.IsNullOrWhiteSpace(input.text)
                ? playerType.ToString()
                : input.text;

            playerNameMap[playerType] = playerName;
            logicalIndex++;
        }

        // playerOneName = string.IsNullOrWhiteSpace(playerOneNameInput.text) ? Ludo_3D_Constants.Player1_Name : playerOneNameInput.text;
        // playerTwoName = string.IsNullOrWhiteSpace(playerTwoNameInput.text) ? Ludo_3D_Constants.Player1_Name : playerTwoNameInput.text;
        // playerThreeName = string.IsNullOrWhiteSpace(playerThreeNameInput.text) ? Ludo_3D_Constants.Player1_Name : playerThreeNameInput.text;
        // playerFourName = string.IsNullOrWhiteSpace(playerFourNameInput.text) ? Ludo_3D_Constants.Player1_Name : playerFourNameInput.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);

        //TODO: Start PVP Game with the selected player count and names
        Debug.Log($"Starting PVP Mode with {selectedPlayerCount} players:");
        Debug.Log($"Player 1: {playerOneName}");
        Debug.Log($"Player 2: {playerTwoName}");

        if (selectedPlayerCount >= 3)
            Debug.Log($"Player 3: {playerThreeName}");
        if (selectedPlayerCount == 4)
            Debug.Log($"Player 4: {playerFourName}");

        InitPlayers();
    }

    private void InitPlayers()
    {
        // update logic based on UpdateInputFieldsVisibility()
        List<PlayerType> playerTypes = new List<PlayerType>();
        if (playerOneNameInput.gameObject.activeInHierarchy)
            playerTypes.Add(PlayerType.Player1);

        if (playerTwoNameInput.gameObject.activeInHierarchy)
            playerTypes.Add(PlayerType.Player2);

        if (playerThreeNameInput.gameObject.activeInHierarchy)
            playerTypes.Add(PlayerType.Player3);

        if (playerFourNameInput.gameObject.activeInHierarchy)
            playerTypes.Add(PlayerType.Player4);

        gameModeHandler = gameModeHandler == null ? InterfaceManager.Instance.GetInterfaceInstance<GameModeHandler>() : gameModeHandler;
        gameModeHandler.InitPVPModeData(playerTypes);
    }

    private void OnClick_SwitchBtn()
    {
        if (SelectedPlayerCount == 2)
        {
            if (playerNameInputParent1.activeSelf)
            {
                playerNameInputParent1.SetActive(false);
                playerNameInputParent2.SetActive(true);
                playerOnePlaceholder.text = "Player 1";
                playerThreePlaceholder.text = "Player 2";
            }
            else
            {
                playerNameInputParent1.SetActive(true);
                playerNameInputParent2.SetActive(false);
                playerTwoPlaceholder.text = "Player 1";
                playerFourPlaceholder.text = "Player 2";
            }
        }
        else if (SelectedPlayerCount == 3)
        {
            hiddenIndex = (hiddenIndex + 1) % rows.Count;
            UpdateRows();
        }
    }

    private void UpdateRows()
    {
        int visiblePlayerIndex = 1;

        for (int i = 0; i < rows.Count; i++)
        {
            bool isHidden = (i == hiddenIndex);
            rows[i].SetActive(!isHidden);

            if (!isHidden)
            {
                TMP_InputField input =
                    rows[i].GetComponentInChildren<TMP_InputField>();

                TMP_Text placeholder = input.placeholder as TMP_Text;
                if (placeholder != null)
                {
                    placeholder.text = $"Player {visiblePlayerIndex}";
                    visiblePlayerIndex++;
                }
            }
        }
    }

    private void OnClick_CloseBtn()
    {
        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();
    }
}