using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using AxCopilot.Models;
using AxCopilot.SDK;
using AxCopilot.Services;

namespace AxCopilot.Handlers;

public class UrlAliasHandler : IActionHandler
{
	private readonly SettingsService _settings;

	private static readonly HashSet<string> AllowedSchemes = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "http", "https", "ftp", "ftps", "ms-settings", "mailto", "file" };

	public string? Prefix => "@";

	public PluginMetadata Metadata => new PluginMetadata("url-alias", "URL 별칭", "1.0", "AX");

	public UrlAliasHandler(SettingsService settings)
	{
		_settings = settings;
	}

	public Task<IEnumerable<LauncherItem>> GetItemsAsync(string query, CancellationToken ct)
	{
		IEnumerable<LauncherItem> result = _settings.Settings.Aliases.Where((AliasEntry a) => a.Type == "url" && (string.IsNullOrEmpty(query) || a.Key.Contains(query, StringComparison.OrdinalIgnoreCase))).Select(delegate(AliasEntry a)
		{
			string faviconPath = GetFaviconPath(a.Target);
			return new LauncherItem(a.Key, a.Description ?? a.Target, faviconPath, a, a.Target, "\ue774");
		});
		return Task.FromResult(result);
	}

	public Task ExecuteAsync(LauncherItem item, CancellationToken ct)
	{
		if (item.Data is AliasEntry aliasEntry)
		{
			string text = Environment.ExpandEnvironmentVariables(aliasEntry.Target);
			if (!IsAllowedUrl(text))
			{
				LogService.Warn("허용되지 않는 URL 스킴: " + text);
				return Task.CompletedTask;
			}
			Process.Start(new ProcessStartInfo(text)
			{
				UseShellExecute = true
			});
		}
		return Task.CompletedTask;
	}

	private static bool IsAllowedUrl(string url)
	{
		if (!Uri.TryCreate(url, UriKind.Absolute, out Uri result))
		{
			return false;
		}
		return AllowedSchemes.Contains(result.Scheme);
	}

	private static string? GetFaviconPath(string url)
	{
		try
		{
			if (!url.StartsWith("http", StringComparison.OrdinalIgnoreCase))
			{
				url = "https://" + url;
			}
			string text = new Uri(url).Host.ToLowerInvariant();
			string text2 = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "AxCopilot", "favicons", text + ".png");
			if (File.Exists(text2))
			{
				return text2;
			}
			FaviconService.GetFavicon(url);
			return null;
		}
		catch
		{
			return null;
		}
	}
}