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

namespace RR.Common.UI
{
    public class SettingsGroupPanel : MonoBehaviour
    {
        [Header("Wiring")]
        [SerializeField] private TMP_Text titleText;
        [SerializeField] private Button headerButton;
        [SerializeField] private GameObject contentRoot; // сюда будут инстанситься строки настроек

        [Header("Optional icons")]
        [SerializeField] private GameObject iconExpanded;
        [SerializeField] private GameObject iconCollapsed;

    public Transform ContentRoot => contentRoot ? contentRoot.transform : transform;
    
    /// <summary>
    /// Событие вызывается при сворачивании/разворачивании группы
    /// </summary>
    public event Action<SettingsGroupPanel, bool> OnExpandedChanged;

    private bool expanded = true;
    private string prefsKey;
    private bool rememberState;
    private string groupTitle = string.Empty;

    public void Init(string title, string prefsKey, bool defaultExpanded, bool rememberState)
    {
        this.prefsKey = prefsKey;
        this.rememberState = rememberState;
        groupTitle = title ?? string.Empty;

        if (titleText) titleText.text = title;

        bool startExpanded = defaultExpanded;
        if (this.rememberState && !string.IsNullOrEmpty(this.prefsKey))
            startExpanded = PlayerPrefs.GetInt(this.prefsKey, defaultExpanded ? 1 : 0) == 1;

        SetExpanded(startExpanded, save: false);

        if (headerButton)
        {
            headerButton.onClick.RemoveAllListeners();
            headerButton.onClick.AddListener(Toggle);
        }
    }

    public void BindExternalDescriptionTarget(TMP_Text targetText)
    {
        if (headerButton == null) return;

        SelectableDescriptionTarget descriptionTarget =
            headerButton.GetComponent<SelectableDescriptionTarget>();

        if (descriptionTarget == null)
            descriptionTarget = headerButton.gameObject.AddComponent<SelectableDescriptionTarget>();

        descriptionTarget.Configure(targetText, $"Группа {groupTitle}");
    }

    public void Toggle() => SetExpanded(!expanded, save: true);

    public void SetExpanded(bool value, bool save)
    {
        expanded = value;

        if (contentRoot) contentRoot.SetActive(expanded);
        if (iconExpanded) iconExpanded.SetActive(expanded);
        if (iconCollapsed) iconCollapsed.SetActive(!expanded);

        if (save && rememberState && !string.IsNullOrEmpty(prefsKey))
        {
            PlayerPrefs.SetInt(prefsKey, expanded ? 1 : 0);
            PlayerPrefs.Save();
        }

        // Чтобы лэйаут сразу пересчитался
        var rt = transform as RectTransform;
        if (rt) LayoutRebuilder.ForceRebuildLayoutImmediate(rt);
        
        // Уведомляем подписчиков об изменении состояния
        OnExpandedChanged?.Invoke(this, expanded);
    }
}
}