using GB5Shared.DTO.Framework.Login;
using PIEDAL.CustomCode.QC;
using PIEDAL.DTO.QC;

namespace PIEBLL.QC;

/// <summary>
/// PIE QC sub-domain — business logic.
/// Assembles the behavior matrix (header + rows) and delegates test template retrieval.
/// Read-only: no writes, no transactions, no cache invalidation.
/// </summary>
public class PIEQcBLL : IPIEQcBLL
{
    private readonly IPIEQcDAL _PIEQcDAL;

    public PIEQcBLL(IPIEQcDAL pieQcDAL)
    {
        _PIEQcDAL = pieQcDAL;
    }

    /// <inheritdoc />
    public async Task<PIEBehaviorMatrixDTO?> GetPIEBehaviorMatrixAsync(
        Guid moduleId, LoginDTO login, CancellationToken ct)
    {
        // Fetch header and rows in parallel
        var headerTask = _PIEQcDAL.GetBehaviorMatrixHeaderAsync(moduleId, login, ct);
        var rowsTask   = _PIEQcDAL.GetBehaviorMatrixRowsAsync(moduleId, login, ct);

        await Task.WhenAll(headerTask, rowsTask).ConfigureAwait(false);

        var header = await headerTask;
        if (header is null) return null;   // Module not found

        header.Rows = (await rowsTask).ToList();
        return header;
    }

    /// <inheritdoc />
    public async Task<IEnumerable<PIETestTemplateDTO>> GetPIETestTemplatesAsync(
        Guid moduleId, LoginDTO login, CancellationToken ct)
        => await _PIEQcDAL.GetTestTemplatesAsync(moduleId, login, ct).ConfigureAwait(false);
}