using Erp.Languages.Entities;
using Microsoft.Extensions.Localization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Volo.Abp.Caching;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Domain.Repositories;
using Volo.Abp.Localization;
using Volo.Abp.Threading;

namespace Erp.Languages.Localization;

public class DatabaseResourceLocalizer : IDatabaseResourceLocalizer, ISingletonDependency
{
    private readonly IRepository<LanguageText, Guid> languageTextRepository;
    private readonly IDistributedCache<LanguageTextCacheItem> cache;

    public DatabaseResourceLocalizer(
        IRepository<LanguageText, Guid> languageTextRepository,
        IDistributedCache<LanguageTextCacheItem> cache)
    {
        this.languageTextRepository = languageTextRepository;
        this.cache = cache;
    }

    public LocalizedString GetOrNull(LocalizationResourceBase resource, string cultureName, string name)
    {
        var item = GetCacheItem(resource, cultureName);
        var value = item.Dictionary?.GetOrDefault(name);
        if (item == null || value == null)
        {
            return null;
        }
        return new LocalizedString(name, value);
    }

    protected LanguageTextCacheItem GetCacheItem(LocalizationResourceBase resource, string cultureName)
    {
        // culture, resource, key
        var key = LanguageTextCacheItem.CalculateCacheKey(resource.ResourceName, cultureName);
        return cache.GetOrAdd(key, () => CreateCacheItem(resource, cultureName));
    }

    public void Fill(LocalizationResourceBase resource, string cultureName, Dictionary<string, LocalizedString> dictionary)
    {
        var item = GetCacheItem(resource, cultureName);

        foreach (var kvp in item.Dictionary)
        {
            dictionary[kvp.Key] = new LocalizedString(kvp.Key, kvp.Value);
        }
    }

    protected virtual LanguageTextCacheItem CreateCacheItem(LocalizationResourceBase resource, string cultureName)
    {
        //TODO VT'den textleri alip cache'e dolduran kismi yazalim
        //TODO:SÖ
        var task = languageTextRepository.GetListAsync(a => a.ResourceName == resource.ResourceName && a.CultureName == cultureName);
        var texts = AsyncHelper.RunSync(() => task);

        return new LanguageTextCacheItem
        {
            Dictionary = texts.ToDictionary(a => a.Key, a => a.Value)
        };
    }

    public async Task FillAsync(LocalizationResourceBase resource, string cultureName, Dictionary<string, LocalizedString> dictionary)
    {
        var key = LanguageTextCacheItem.CalculateCacheKey(resource.ResourceName, cultureName);
        var item = await cache.GetOrAddAsync(key, () => CreateCacheItemAsync(resource, cultureName));

        foreach (var kvp in item.Dictionary)
        {
            dictionary[kvp.Key] = new LocalizedString(kvp.Key, kvp.Value);
        }
    }

    protected virtual async Task<LanguageTextCacheItem> CreateCacheItemAsync(LocalizationResourceBase resource, string cultureName)
    {
        var texts = await languageTextRepository.GetListAsync(a => a.ResourceName == resource.ResourceName && a.CultureName == cultureName);

        return new LanguageTextCacheItem
        {
            Dictionary = texts.ToDictionary(a => a.Key, a => a.Value)
        };
    }
}