using AuroraDesk.Core.Interfaces;
using AuroraDesk.Core.Entities;
using HeroIconsAvalonia.Enums;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;

namespace AuroraDesk.Infrastructure.Services;

/// <summary>
/// 图标服务实现
/// </summary>
public class IconService : IIconService
{
    private readonly ILogger<IconService>? _logger;
    private IEnumerable<HeroIconItem>? _cachedIcons;

    public IconService(ILogger<IconService>? logger = null)
    {
        _logger = logger;
    }

    public IEnumerable<HeroIconItem> GetIcons()
    {
        // 如果缓存存在，直接返回
        if (_cachedIcons != null)
        {
            return _cachedIcons;
        }

        // 缓存不存在，同步创建（操作很快，不需要异步）
        try
        {
            _logger?.LogInformation("开始加载 HeroIcons 图标");
            
            // 优化：使用 LINQ 批量创建，比循环更快
            var iconTypes = Enum.GetValues(typeof(IconType)).Cast<IconType>().ToArray();
            
            // 预分配容量，避免多次扩容
            var icons = new List<HeroIconItem>(iconTypes.Length * 2);
            
            // 使用 LINQ Select 批量创建，性能更好
            var outlineIcons = iconTypes.Select(iconType => new HeroIconItem
            {
                IconType = iconType,
                IconKind = IconKind.Outline
            });
            
            var solidIcons = iconTypes.Select(iconType => new HeroIconItem
            {
                IconType = iconType,
                IconKind = IconKind.Solid
            });
            
            // 合并两个集合
            icons.AddRange(outlineIcons);
            icons.AddRange(solidIcons);

            _cachedIcons = icons;
            _logger?.LogInformation("成功加载 {Count} 个 HeroIcons 图标", icons.Count);
            
            return icons;
        }
        catch (Exception ex)
        {
            _logger?.LogError(ex, "加载 HeroIcons 图标时发生错误");
            return Enumerable.Empty<HeroIconItem>();
        }
    }
}