using ZA.CoreService.ESBCertificateManager.Models;

namespace ZA.CoreService.ESBCertificateManager.Data;

public static class TargetRepositoryFactory
{
    public static async Task<(ITargetRepository Repository, string LoadMessage)> CreateAsync(
        AppSettings settings,
        CancellationToken cancellationToken = default)
    {
        string samplePath = Path.GetFullPath(
            Path.Combine(AppContext.BaseDirectory, settings.SampleTargetsPath));

        if (settings.UseOfflineSampleData)
        {
            ITargetRepository jsonRepo = new JsonTargetRepository(samplePath);
            _ = await jsonRepo.GetActiveTargetsAsync(cancellationToken);
            return (jsonRepo, $"Ziele geladen aus {jsonRepo.SourceDescription}.");
        }

        if (string.IsNullOrWhiteSpace(settings.ConnectionString))
        {
            return OfflineSample(samplePath, "Keine SQL-Verbindung konfiguriert – Offline-Sample wird verwendet.");
        }

        try
        {
            SqlTargetRepository sqlRepo = new(settings.ConnectionString);
            _ = await sqlRepo.GetActiveTargetsAsync(cancellationToken);
            return (sqlRepo, $"Ziele geladen aus {sqlRepo.SourceDescription}.");
        }
        catch (Exception ex)
        {
            return OfflineSample(
                samplePath,
                $"SQL nicht erreichbar ({ex.Message}). Offline-Sample wird verwendet.");
        }
    }

    private static (ITargetRepository Repository, string LoadMessage) OfflineSample(
        string samplePath,
        string message)
        => (new JsonTargetRepository(samplePath), message);
}