#nullable enable
using Cysharp.Threading.Tasks;
using System;
using System.Threading.Tasks;
using TMPro;
using UnityEngine;
using UVC.Core;
using UVC.Studio.Config;
using UVC.UI.Tab;

namespace UVC.Studio.Modal.Settings
{
    public class SettingDatabaseTabContent : MonoBehaviour, ITabContent
    {

        [SerializeField]
        private TMP_InputField? ipTxt;

        [SerializeField]
        private TMP_InputField? portTxt;

        [SerializeField]
        private TMP_InputField? idTxt;

        [SerializeField]
        private TMP_InputField? pwTxt;

        private Setting? setting;

        private bool changedValue = false;

        // Tab 키 포커스 이동을 위한 InputField 배열
        private TMP_InputField?[] inputFields = null!;

        /// <summary>
        /// 탭 콘텐츠에 데이터를 전달합니다.
        /// </summary>
        /// <param name="data">전달할 데이터 객체</param>
        public async void SetContentData(object? data)
        {
            if (setting == null)
            {
                // 동적으로 로드되는 Prefab이므로 [Inject]가 자동으로 동작하지 않음
                await InjectorAppContext.Instance.WaitForInitializationAsync();
                setting = InjectorAppContext.Instance.Get<Setting>();
            }
            
            if (setting != null)
            {
                changedValue = false;

                DatabaseSetting database = setting.Data.database;
                if (ipTxt != null)
                {
                    ipTxt.text = database.ip;
                    ipTxt.onEndEdit.AddListener((value) =>
                    {
                        setting.Data.database.ip = value;
                        changedValue = true;
                    });
                }
                if (portTxt != null)
                {
                    portTxt.text = database.port.ToString();
                    portTxt.onEndEdit.AddListener((value) =>
                    {
                        if (int.TryParse(value, out int intValue))
                        {
                            setting.Data.database.port = intValue;
                            changedValue = true;
                        }
                    });
                }
                if (idTxt != null)
                {
                    idTxt.text = database.id;
                    idTxt.onEndEdit.AddListener((value) =>
                    {
                        setting.Data.database.id = value;
                        changedValue = true;
                    });
                }
                if (pwTxt != null)
                {
                    pwTxt.text = database.password;
                    pwTxt.onEndEdit.AddListener((value) =>
                    {
                        setting.Data.database.password = value;
                        changedValue = true;
                    });
                }

                // Tab 키 포커스 이동을 위한 배열 초기화
                inputFields = new TMP_InputField?[] { ipTxt, portTxt, idTxt, pwTxt };
            }
        }

        private void Update()
        {
            // Tab 키 입력 처리
            if (Input.GetKeyDown(KeyCode.Tab) && inputFields != null)
            {
                int currentIndex = GetCurrentFocusedIndex();
                if (currentIndex >= 0)
                {
                    int nextIndex = Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift)
                        ? (currentIndex - 1 + inputFields.Length) % inputFields.Length  // Shift+Tab: 이전
                        : (currentIndex + 1) % inputFields.Length;                       // Tab: 다음

                    if (inputFields[nextIndex] != null)
                    {
                        inputFields[nextIndex]!.Select();
                    }
                }
            }
        }

        private int GetCurrentFocusedIndex()
        {
            if (inputFields == null) return -1;

            for (int i = 0; i < inputFields.Length; i++)
            {
                if (inputFields[i] != null && inputFields[i]!.isFocused)
                {
                    return i;
                }
            }
            return -1;
        }

        /// <summary>
        /// 탭 전환 시 데이터가 있는 경우 전달 되는 데이터. SetContentData 이후 호출 됨
        /// </summary>
        /// <param name="data">전달할 데이터 객체</param>
        public void UpdateContentData(object? data)
        {
            if (data != null && data is string content)
            {
                Debug.Log($"UpdateContentData: {content}");
            }
        }

        /// <summary>
        /// 닫힐 때 실행되는 로직을 처리합니다.
        /// </summary>
        /// <returns>비동기 닫기 작업을 나타내는 <see cref="UniTask"/>입니다.</returns>
        public async UniTask OnCloseAsync()
        {
            if (ipTxt != null) ipTxt.onEndEdit.RemoveAllListeners();
            if (portTxt != null) portTxt.onEndEdit.RemoveAllListeners();
            if (idTxt != null) idTxt.onEndEdit.RemoveAllListeners();
            if (pwTxt != null) pwTxt.onEndEdit.RemoveAllListeners();

            Debug.Log($"SettingDatabaseTabContent OnCloseAsync: changedValue={changedValue} setting == null:{setting == null}");
            if (changedValue && setting != null)
            {
                await setting.SaveAsync();
                Debug.Log("Database settings saved.");
            }
        }
    }
}