using PrivaPub.Models.Data;
using PrivaPub.StaticServices;

namespace PrivaPub.Services.ClientToServer.Public
{
    public class DataService : IDataService
    {
        readonly DbEntities DbEntities;
        readonly AppConfigurationService AppConfigurationService;

        public DataService(DbEntities dbCollections, AppConfigurationService appConfigurationService)
        {
            DbEntities = dbCollections;
            AppConfigurationService = appConfigurationService;
        }

        public string GetCurrentVersion() =>
             AppConfigurationService.AppConfiguration.Version;

        public async Task<IEnumerable<Language>> GetLanguages(CancellationToken cancellationToken)
        {
            return (await DbEntities.Languages
                            .Match(l => AppConfigurationService.AppConfiguration.SupportedLanguages.Contains(l.International2Code))
                            .ExecuteAsync(cancellationToken)).OrderBy(l => l.NativeName).ToArray();
        }

        public async Task<bool> IsValidLanguageId(string languageId)
        {
            var anyLanguageWithId = await DbEntities.Languages.Match(l => l.ID == languageId).ExecuteAnyAsync();
            if (!anyLanguageWithId)
                return false;
            var language2Code = (await DbEntities.Languages
                            .Match(l => l.ID == languageId).ExecuteFirstAsync())?.International2Code;
            return AppConfigurationService.AppConfiguration.SupportedLanguages.Contains(language2Code);
        }
    }
}