using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Button))]
public class SummonCardButton : MonoBehaviour
{
    [Header("角色数据")]
    public CharacterData characterData;

    [Header("卡槽配置")]
    [Min(1)]
    public int summonSlot = 1;

    [Header("UI 引用")]
    public Image cooldownMask;
    public Text cooldownText;
    public Image cardIcon;
    public Text characterNameText;
    public Text manaCostText;

    private Button button;
    private MainCharacterCombat combat;
    private float cooldownTimer;
    private bool isOnCooldown;

    private void Awake()
    {
        button = GetComponent<Button>();
        combat = FindObjectOfType<MainCharacterCombat>();
        button.onClick.AddListener(OnClick);
        
        isOnCooldown = false;
        cooldownTimer = 0f;
        
        UpdateCardUI();
        UpdateCooldownUI();
    }

    private void OnDestroy()
    {
        if (button != null)
        {
            button.onClick.RemoveListener(OnClick);
        }
    }

    private void Update()
    {
        if (isOnCooldown)
        {
            cooldownTimer -= Time.deltaTime;
            if (cooldownTimer <= 0f)
            {
                isOnCooldown = false;
                cooldownTimer = 0f;
            }

            UpdateCooldownUI();
        }

        UpdateButtonState();
    }

    public void OnClick()
    {
        if (isOnCooldown || characterData == null)
        {
            return;
        }

        if (combat == null)
        {
            combat = FindObjectOfType<MainCharacterCombat>();
        }

        if (combat != null && combat.RequestSummon(summonSlot))
        {
            StartCooldown();
        }
    }

    private void StartCooldown()
    {
        if (characterData != null)
        {
            isOnCooldown = true;
            cooldownTimer = characterData.cooldownTime;
            UpdateCooldownUI();
        }
    }

    private void UpdateCooldownUI()
    {
        if (cooldownMask != null)
        {
            cooldownMask.fillAmount = isOnCooldown ? (cooldownTimer / GetCooldownTime()) : 0f;
            cooldownMask.enabled = isOnCooldown;
        }

        if (cooldownText != null)
        {
            cooldownText.text = isOnCooldown ? Mathf.CeilToInt(cooldownTimer).ToString() : "";
            cooldownText.enabled = isOnCooldown;
        }
    }

    private void UpdateButtonState()
    {
        if (button == null)
        {
            return;
        }

        button.interactable = !isOnCooldown && CanAfford();
    }

    private bool CanAfford()
    {
        if (ManaSystem.Instance == null || characterData == null)
        {
            return false;
        }

        return ManaSystem.Instance.CurrentManaInt >= characterData.manaCost;
    }

    private float GetCooldownTime()
    {
        return characterData != null ? characterData.cooldownTime : 5f;
    }

    private void UpdateCardUI()
    {
        if (characterData == null)
        {
            return;
        }

        if (cardIcon != null && characterData.cardIcon != null)
        {
            cardIcon.sprite = characterData.cardIcon;
        }

        if (characterNameText != null)
        {
            characterNameText.text = characterData.characterName;
        }

        if (manaCostText != null)
        {
            manaCostText.text = characterData.manaCost.ToString();
        }
    }
}