using System.Collections.Generic;
using RR.Common.Settings;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace RR.Common.UI
{
    /// <summary>
    /// Биндер для выбора из списка опций (как enum или список строк).
    /// Использует Dropdown или кнопки влево/вправо для переключения.
    /// </summary>
    public class SettingsOptionPickerBinder : MonoBehaviour
    {
        [SerializeField] private string key;
        [SerializeField] private TMP_Dropdown dropdown;
        [SerializeField] private TMP_Text label;
        
        // Альтернативный вариант: кнопки влево/вправо + текст текущего значения
        [Header("Alternative: Buttons")]
        [SerializeField] private Button prevButton;
        [SerializeField] private Button nextButton;
        [SerializeField] private TMP_Text valueText;

        private SettingEntry def;
        private bool useDropdown = true;

        private void Start()
        {
            if (!SettingsManager.Instance)
            {
                Debug.LogError("[SettingsOptionPickerBinder] SettingsManager.Instance not found!");
                gameObject.SetActive(false);
                return;
            }

            def = SettingsManager.Instance.Define(key);
            if (def == null)
            {
                Debug.LogWarning($"[SettingsOptionPickerBinder] Setting '{key}' not found in database.");
                gameObject.SetActive(false);
                return;
            }

            if (def.valueType != SettingValueType.OptionPicker)
            {
                Debug.LogWarning($"[SettingsOptionPickerBinder] Setting '{key}' is not an OptionPicker type!");
                gameObject.SetActive(false);
                return;
            }

            if (def.options == null || def.options.Count == 0)
            {
                Debug.LogWarning($"[SettingsOptionPickerBinder] Setting '{key}' has no options!");
                gameObject.SetActive(false);
                return;
            }

            // Определяем режим работы
            useDropdown = dropdown != null;

            if (label)
                label.text = def.displayName ?? key;

            if (useDropdown)
                InitDropdown();
            else
                InitButtons();
        }

        private void InitDropdown()
        {
            if (!dropdown) return;

            // Заполняем dropdown опциями
            dropdown.ClearOptions();
            dropdown.AddOptions(def.options);

            // Устанавливаем текущее значение
            int currentIndex = SettingsManager.Instance.Get(key).i;
            dropdown.SetValueWithoutNotify(currentIndex);

            // Подписываемся на изменения
            dropdown.onValueChanged.AddListener(OnDropdownChanged);
        }

        private void InitButtons()
        {
            if (!prevButton || !nextButton) return;

            prevButton.onClick.AddListener(OnPrevClicked);
            nextButton.onClick.AddListener(OnNextClicked);

            UpdateButtonsDisplay();
        }

        private void OnDropdownChanged(int newIndex)
        {
            SettingsManager.Instance.Set(key, SettingValue.Int(newIndex));
        }

        private void OnPrevClicked()
        {
            int current = SettingsManager.Instance.Get(key).i;
            int newIndex = current - 1;
            if (newIndex < 0) newIndex = def.options.Count - 1; // Wrap around
            
            SettingsManager.Instance.Set(key, SettingValue.Int(newIndex));
            UpdateButtonsDisplay();
        }

        private void OnNextClicked()
        {
            int current = SettingsManager.Instance.Get(key).i;
            int newIndex = (current + 1) % def.options.Count; // Wrap around
            
            SettingsManager.Instance.Set(key, SettingValue.Int(newIndex));
            UpdateButtonsDisplay();
        }

        private void UpdateButtonsDisplay()
        {
            if (!valueText) return;

            int currentIndex = SettingsManager.Instance.Get(key).i;
            if (currentIndex >= 0 && currentIndex < def.options.Count)
                valueText.text = def.options[currentIndex];
        }
    }
}