using UnityEngine;
using TMPro;
using InputGlyphsFramework;

public class GlyphService : MonoBehaviour
{
    public static GlyphService Instance { get; private set; }
    public InputGlyphDatabase database;

    void Awake()
    {
        if (Instance != null && Instance != this) { Destroy(this); return; }
        Instance = this;
    }

    public bool TryGetTMPTagForActionPath(string controlPath, InputDeviceWatcher.InputDeviceCategory device, out string tag, out string displayFallback)
    {
        tag = null;
        displayFallback = null;
        if (string.IsNullOrEmpty(controlPath) || database == null) return false;

        // 优先查当前设备表
        var entry = database.FindEntryByControlPath(controlPath, device);
        if (entry == null)
        {
            // 回退到 keyboard 表
            entry = database.FindEntryByControlPath(controlPath, InputDeviceWatcher.InputDeviceCategory.Keyboard);
        }

        if (entry == null)
        {
            displayFallback = GetDisplayNameFromControlPath(controlPath);
            return false;
        }

        // 需要一个对应的 TMP Sprite Asset 来生成 <sprite> 标签 —— 查找 entry 所在的表（优先当前设备，再 keyboard）
        DeviceGlyphTable table = database.GetTable(device) ?? database.GetTable(InputDeviceWatcher.InputDeviceCategory.Keyboard);
        if (table == null || table.tmpAsset == null)
        {
            displayFallback = GetDisplayNameFromControlPath(controlPath);
            return false;
        }

        var sprite = entry.Sprite;
        if (sprite == null)
        {
            displayFallback = GetDisplayNameFromControlPath(controlPath);
            return false;
        }

        var spriteName = sprite.name;
        tag = $"<sprite name=\"{spriteName}\">";
        return true;
    }

    public bool TryGetUISpriteForActionPath(string controlPath, InputDeviceWatcher.InputDeviceCategory device, out Sprite sprite)
    {
        sprite = null;
        if (string.IsNullOrEmpty(controlPath) || database == null) return false;

        var entry = database.FindEntryByControlPath(controlPath, device);
        if (entry == null)
        {
            entry = database.FindEntryByControlPath(controlPath, InputDeviceWatcher.InputDeviceCategory.Keyboard);
        }
        if (entry == null) return false;
        if (entry.Sprite == null) return false;

        sprite = entry.Sprite;
        return true;
    }

    string GetDisplayNameFromControlPath(string controlPath)
    {
        if (string.IsNullOrEmpty(controlPath)) return string.Empty;
        var parts = controlPath.Split('/');
        var last = parts[parts.Length - 1].Trim(new char[] { '{', '}', '<', '>', '\'', '"' });
        return last;
    }
}