using System;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace AibisDream.UI
{
    public class TerminalOptionItemView : MonoBehaviour
    {
        [SerializeField] private TMP_Text labelText;
        [SerializeField] private TMP_Text valueText;
        [SerializeField] private Button previousButton;
        [SerializeField] private Button nextButton;

        private string _propName;
        private UIFormOption[] _options = Array.Empty<UIFormOption>();
        private int _currentIndex;
        private Action<string, string> _onValueChanged;

        private void Awake()
        {
            previousButton?.onClick.AddListener(Previous);
            nextButton?.onClick.AddListener(Next);
        }

        private void OnDestroy()
        {
            previousButton?.onClick.RemoveListener(Previous);
            nextButton?.onClick.RemoveListener(Next);
        }

        public void Init(string propName, string label, UIFormOption[] options, Action<string, string> onValueChanged)
        {
            _propName = propName;
            _options = options ?? Array.Empty<UIFormOption>();
            _onValueChanged = onValueChanged;

            if (labelText != null)
            {
                labelText.text = label;
            }
        }

        public void SetValue(string value)
        {
            var index = Array.FindIndex(_options, option => option.prop == value);
            _currentIndex = Mathf.Clamp(index < 0 ? 0 : index, 0, Mathf.Max(0, _options.Length - 1));
            RefreshValue();
        }

        private void Previous()
        {
            Step(-1);
        }

        private void Next()
        {
            Step(1);
        }

        private void Step(int offset)
        {
            if (_options.Length == 0)
            {
                return;
            }

            _currentIndex = (_currentIndex + offset + _options.Length) % _options.Length;
            RefreshValue();
            _onValueChanged?.Invoke(_propName, _options[_currentIndex].prop);
        }

        private void RefreshValue()
        {
            if (valueText != null)
            {
                valueText.text = _options.Length == 0 ? string.Empty : $"<{_options[_currentIndex].label}>";
            }
        }
    }
}