using TMPro;
using UnityEngine.UI;
using UnityEngine;
using asap.core;
using UniRx;

public class GeneralMultiplierButton : MonoBehaviour
{
    [SerializeField] private Button btn;
    [SerializeField] private TMP_Text text;
    [SerializeField] private GameObject max = null;
    [SerializeField] private PinballUncountableMultiplierPopupView popupMultiplier;
    private IHasMultiplier _data;

    /// <summary>
    /// 获取当前倍率, 如果没有数据返回-1
    /// </summary>
    public int Multiplier => _data.GetMultiplier();

    private void Start()
    {
        btn.onClick.AddListener(OnClick);
        var manager = GContext.container.Resolve<PinballUncountable.Manager>();
        manager.EventAggregator.GetEvent<PinballUncountable.EventTicketUpdate>()
            .Subscribe(_ => DetermineMax())
            .AddTo(this);
    }

    private void OnDestroy()
    {
        btn.onClick.RemoveListener(OnClick);
    }

    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="data">满足条件的数据结构</param>
    public void Init(IHasMultiplier data)
    {
        _data = data;
        var multipliers = data.GetMultiplierArray();
        var num = _data.GetMultiplier();

        if (multipliers.Length <= 0)
        {
            Debug.LogError("[General Multiplier Button] No multiplier data found.", this);
            text.text = "x1";
            DetermineMax();
            return;
        }

        if (num == -1)
            _data.SetMultiplier(multipliers[0]);
        text.text = GetText();
        DetermineMax();
    }

    public void SetToCurrentMax()
    {
        _data.SetMultiplier(GetCurrentMaxMultiplier());
        text.text = GetText();
    }

    private string GetText()
    {
        return $"x{_data.GetMultiplier()}";
    }

    private void OnClick()
    {
        if (_data == null)
            return;
        if (_data.GetTicketCount() < _data.GetMultiplier())
        {
            SetToCurrentMax();
            ShowMax();
            popupMultiplier.Show(_data.GetMultiplier(), true);
            return;
        }
        var (isMax, multiplier) = GetNextMultiplier();
        _data.SetMultiplier(multiplier);
        popupMultiplier.Show(_data.GetMultiplier(), isMax);
        if (isMax)
            ShowMax();
        else
            HideMax();
        text.text = GetText();
    }

    private int GetCurrentMaxMultiplier()
    {
        var multipliers = _data.GetMultiplierArray();
        if (multipliers.Length <= 0)
        {
            Debug.LogError("[General Multiplier Button] No multiplier data found.", this);
            return 1;
        }
        for (int i = multipliers.Length - 1; i >= 0; i--)
        {
            if (multipliers[i] > _data.GetTicketCount())
                continue;
            return multipliers[i];
        }
        return multipliers[0];
    }

    private (bool isMax, int multiplier) GetNextMultiplier()
    {
        var multipliers = _data.GetMultiplierArray();
        if (multipliers.Length <= 0)
        {
            Debug.LogError("[General Multiplier Button] No multiplier data found.", this);
            return (false, 0);
        }
        var idx = 0;
        var cur = _data.GetMultiplier();
        while (idx < multipliers.Length)
        {
            if (multipliers[idx] == cur)
                break;
            idx++;
        }
        if (idx >= multipliers.Length)
        {
            Debug.LogError($"[General Multiplier Button] Multiplier {cur} not found in array.", this);
            Debug.LogError($"[General Multiplier Button] Array: {string.Join(",", multipliers)}", this);
            return (false, multipliers[0]);
        }
        idx++;

        idx %= multipliers.Length;
        if (multipliers[idx] > _data.GetTicketCount())
            idx = 0;

        // UGLY HACK: 判断是否显示最大倍率
        var nextIdx = (idx + 1) % multipliers.Length;
        bool isMax;
        if (multipliers[nextIdx] > _data.GetTicketCount() || nextIdx == 0)
        {
            isMax = true;
        }
        else
        {
            isMax = false;
        }

        return (isMax, multipliers[idx]);
    }

    private void DetermineMax()
    {
        var idx = 0;
        var cur = _data.GetMultiplier();
        var multipliers = _data.GetMultiplierArray();
        while (idx < multipliers.Length)
        {
            if (multipliers[idx] == cur)
                break;
            idx++;
        }

        var nextIdx = (idx + 1) % multipliers.Length;
        if (multipliers[nextIdx] > _data.GetTicketCount() || nextIdx == 0)
            ShowMax();
        else
            HideMax();
    }

    public void ShowMax()
    {
        if (max != null)
            max.SetActive(true);
    }

    private void HideMax()
    {
        if (max != null)
            max.SetActive(false);
    }
}

public interface IHasMultiplier
{
    /// <summary>
    /// 当前有多少代币
    /// </summary>
    /// <returns>代币数量</returns>
    public int GetTicketCount();
    /// <summary>
    /// 获取此活动的倍率列表
    /// </summary>
    /// <returns>倍率列表</returns>
    public int[] GetMultiplierArray();
    /// <summary>
    /// 获取当前倍率，如果没有数据返回-1
    /// </summary>
    /// <returns>当前倍率，没有存过则返回-1</returns>
    public int GetMultiplier();
    /// <summary>
    /// 设置当前倍率,并存储（如果需要的话）
    /// </summary>
    /// <param name="multiplier">倍率</param>
    public void SetMultiplier(int multiplier);
}