using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace TcgEngine.UI
{
    /// <summary>
    /// Bar that contain multiple icons to represent a value
    /// Such as the mana bar during the game
    /// </summary>

    public class IconBar : MonoBehaviour
    {
        public int value = 0;
        public int max_value = 4;
        public bool auto_refresh = true;

        public Image[] icons;
        public Sprite sprite_full;
        public Sprite sprite_empty;
        
        [Header("Value Display")]
        public Text value_text;        // 显示当前法力值数字的文本组件
        public string value_format = "{0}"; // 文本格式，{0}会被替换为当前值

        void Awake()
        {

        }

        void Update()
        {
            if (auto_refresh)
                Refresh();
        }

        public void Refresh()
        {
            if (icons == null)
                return;
                
            int index = 0;
            foreach (Image icon in icons)
            {
                if (icon == null)
                    continue;
                    
                icon.gameObject.SetActive(index < value || index < max_value);
                icon.sprite = (index < value) ? sprite_full : sprite_empty;
                index++;
            }
            
            // 更新法力值数字文本
            UpdateValueText();
        }
        
        private void UpdateValueText()
        {
            if (value_text != null)
            {
                value_text.text = string.Format(value_format, value);
            }
        }
        
        // 手动设置值并更新文本
        public void SetValue(int new_value)
        {
            value = new_value;
            UpdateValueText();
        }

        public void SetMat(Material mat)
        {
            if (icons == null)
                return;
                
            foreach (Image icon in icons)
            {
                if (icon != null)
                    icon.material = mat;
            }
        }
    }
}