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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using Mdict.Mdx.Readers;
using Mdx.Storage;
namespace mdict.Services
{
public class DictionaryItem
{
public string FilePath { get; set; }
public string Name { get; set; }
public MdxReader Reader { get; set; }
}
public class LibraryManager : IDisposable
{
private static LibraryManager _instance;
public static LibraryManager Instance => _instance ??= new LibraryManager();
public ObservableCollection<DictionaryItem> LoadedDictionaries { get; } = new ObservableCollection<DictionaryItem>();
public void AddDictionary(string path)
{
if (LoadedDictionaries.Any(d => d.FilePath.Equals(path, StringComparison.OrdinalIgnoreCase)))
return;
try
{
var reader = new MdxReader(path);
var info = reader.ContentDb.Meta.DbInfo;
var name = !string.IsNullOrEmpty(info.Title) ? info.Title : System.IO.Path.GetFileNameWithoutExtension(path);
LoadedDictionaries.Add(new DictionaryItem
{
FilePath = path,
Name = name,
Reader = reader
});
}
catch (Exception ex)
{
// TODO: Log error
Console.WriteLine($"Failed to load dictionary {path}: {ex.Message}");
throw;
}
}
public void RemoveDictionary(DictionaryItem item)
{
if (LoadedDictionaries.Contains(item))
{
item.Reader?.Dispose();
LoadedDictionaries.Remove(item);
}
}
public List<(DictionaryItem Dictionary, KeyIndex Index)> Search(string query)
{
var results = new List<(DictionaryItem, KeyIndex)>();
foreach (var dict in LoadedDictionaries)
{
try
{
var index = dict.Reader.Lookup(query);
if (index != null)
{
results.Add((dict, index));
}
}
catch (Exception ex)
{
Console.WriteLine($"Error searching in {dict.Name}: {ex.Message}");
}
}
return results;
}
public List<string> GetSuggestions(string prefix, int maxCount = 20)
{
// Basic implementation: just verify exact match or start match for now.
// A real implementation would iterate keys.
// MdxReader doesn't expose key iteration easily yet without scanning blocks.
// For now, we rely on exact lookup or maybe simple linear scan if supported.
// TODO: Implement prefix search in MdxReader (ZdbReader).
return new List<string>();
}
public string? GetHtml(string key)
{
foreach (var dict in LoadedDictionaries)
{
try
{
var index = dict.Reader.Lookup(key);
if (index != null)
{
return dict.Reader.GetHtml(index);
}
}
catch { }
}
return null;
}
public byte[]? GetResource(string key)
{
foreach (var dict in LoadedDictionaries)
{
try
{
var data = dict.Reader.GetResource(key);
if (data != null)
{
return data;
}
}
catch { }
}
return null;
}
public void Dispose()
{
foreach (var dict in LoadedDictionaries)
{
dict.Reader?.Dispose();
}
LoadedDictionaries.Clear();
}
}
}
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