using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Events;

public class UI_userBag : MonoBehaviour
{
    /// <summary>
    /// 123前言：
    /// 装备升级、装备熔炼、装备幻化、装备属性转移
    /// ———————————————————————————————————————
    /// 升级，每5等级之间使用耗材升级，跨5倍数需要幻化而不是升级；
    /// 熔炼，消耗多余装备变为碎片，碎片可用于兑换新装备；
    /// 幻化，改变装备外观，保留原有属性并进行属性加强，消耗幻化材料；
    /// 属性转移，将一件装备的属性转移到另一件装备上，消耗转移材料；
    /// </summary>
    [Header("weapon system")]
    public ToggleGroup equip_tg;
    public Toggle equipUpdate;
    public Toggle equipSmelt;
    public Toggle equipIllusion;
    public Toggle equipAttributeTransfer;
    public Toggle equipAwake;

    public GameObject equipUpdateObj;
    public GameObject equipSmeltObj;
    public GameObject equipIllusionObj;
    public GameObject equipAttributeTransferObj;
    public GameObject equipAwakeObj;

    [Header("filters")]
    public Dropdown filterDropdown;

    [Header("button")]
    public Button closeBagButton;

    private void Awake()
    {
        InitializeToggleGroup();
        BindToggles();
        BindCloseButton();
        SelectDefaultPanel();
    }

    private void OnEnable()
    {
        InitializeToggleGroup();
        BindToggles();
        BindCloseButton();
        SelectDefaultPanel();
    }

    private void OnDisable()
    {
        UnbindToggle(equipUpdate, HandleEquipUpdateChanged);
        UnbindToggle(equipSmelt, HandleEquipSmeltChanged);
        UnbindToggle(equipIllusion, HandleEquipIllusionChanged);
        UnbindToggle(equipAttributeTransfer, HandleEquipAttributeTransferChanged);
        UnbindToggle(equipAwake, HandleEquipAwakeChanged);
        UnbindCloseButton();
    }

    private void InitializeToggleGroup()
    {
        if (equip_tg == null)
        {
            return;
        }

        equip_tg.allowSwitchOff = false;
        AssignToggleGroup(equipUpdate);
        AssignToggleGroup(equipSmelt);
        AssignToggleGroup(equipIllusion);
        AssignToggleGroup(equipAttributeTransfer);
        AssignToggleGroup(equipAwake);
    }

    private void AssignToggleGroup(Toggle toggle)
    {
        if (toggle == null || equip_tg == null)
        {
            return;
        }

        toggle.group = equip_tg;
    }

    private void BindToggles()
    {
        RebindToggle(equipUpdate, HandleEquipUpdateChanged);
        RebindToggle(equipSmelt, HandleEquipSmeltChanged);
        RebindToggle(equipIllusion, HandleEquipIllusionChanged);
        RebindToggle(equipAttributeTransfer, HandleEquipAttributeTransferChanged);
        RebindToggle(equipAwake, HandleEquipAwakeChanged);
    }

    private void RebindToggle(Toggle toggle, UnityAction<bool> action)
    {
        if (toggle == null)
        {
            return;
        }

        toggle.onValueChanged.RemoveListener(action);
        toggle.onValueChanged.AddListener(action);
    }

    private void UnbindToggle(Toggle toggle, UnityAction<bool> action)
    {
        if (toggle == null)
        {
            return;
        }

        toggle.onValueChanged.RemoveListener(action);
    }

    private void BindCloseButton()
    {
        if (closeBagButton == null)
        {
            return;
        }

        closeBagButton.onClick.RemoveListener(HandleCloseBagClicked);
        closeBagButton.onClick.AddListener(HandleCloseBagClicked);
    }

    private void UnbindCloseButton()
    {
        if (closeBagButton == null)
        {
            return;
        }

        closeBagButton.onClick.RemoveListener(HandleCloseBagClicked);
    }

    private void SelectDefaultPanel()
    {
        if (equipUpdate != null)
        {
            equipUpdate.isOn = true;
            ApplyPanelState(equipUpdateObj);
            return;
        }

        ApplyPanelState(null);
    }

    private void HandleEquipUpdateChanged(bool isOn)
    {
        if (isOn)
        {
            ApplyPanelState(equipUpdateObj);
        }
    }

    private void HandleEquipSmeltChanged(bool isOn)
    {
        if (isOn)
        {
            ApplyPanelState(equipSmeltObj);
        }
    }

    private void HandleEquipIllusionChanged(bool isOn)
    {
        if (isOn)
        {
            ApplyPanelState(equipIllusionObj);
        }
    }

    private void HandleEquipAttributeTransferChanged(bool isOn)
    {
        if (isOn)
        {
            ApplyPanelState(equipAttributeTransferObj);
        }
    }

    private void HandleEquipAwakeChanged(bool isOn)
    {
        if (isOn)
        {
            ApplyPanelState(equipAwakeObj);
        }
    }

    private void HandleCloseBagClicked()
    {
        uBag bagRoot = GetComponentInParent<uBag>();
        if (bagRoot != null)
        {
            Destroy(bagRoot.gameObject);
            return;
        }

        Destroy(gameObject);
    }

    private void ApplyPanelState(GameObject activeObject)
    {
        SetObjectActive(equipUpdateObj, activeObject == equipUpdateObj);
        SetObjectActive(equipSmeltObj, activeObject == equipSmeltObj);
        SetObjectActive(equipIllusionObj, activeObject == equipIllusionObj);
        SetObjectActive(equipAttributeTransferObj, activeObject == equipAttributeTransferObj);
        SetObjectActive(equipAwakeObj, activeObject == equipAwakeObj);

        SetToggleInteractable(equipUpdate, activeObject != equipUpdateObj);
        SetToggleInteractable(equipSmelt, activeObject != equipSmeltObj);
        SetToggleInteractable(equipIllusion, activeObject != equipIllusionObj);
        SetToggleInteractable(equipAttributeTransfer, activeObject != equipAttributeTransferObj);
        SetToggleInteractable(equipAwake, activeObject != equipAwakeObj);
    }

    private void SetObjectActive(GameObject target, bool active)
    {
        if (target == null)
        {
            return;
        }

        target.SetActive(active);
    }

    private void SetToggleInteractable(Toggle toggle, bool interactable)
    {
        if (toggle == null)
        {
            return;
        }

        toggle.interactable = interactable;
    }
}