using EntitlementDAL.DTOs;
using GB5Shared.QueryExecutor;

namespace EntitlementBLL.Interfaces;

public interface IChangeRequestBLL
{
    Task<int> SubmitChangePlanRequestAsync(int clientId, int subscriptionId, int newPlanId, int requestedByClientUserId, CancellationToken ct);
    Task<int> SubmitRenewalRequestAsync(int clientId, int subscriptionId, DateTime proposedValidTill, int requestedByClientUserId, CancellationToken ct);

    /// <summary>validUntil is stored on ChangeRequestDTO.ProposedValidTill (reused rather than adding
    /// a beta-specific column) and becomes the enrolment's ValidUntil on approval; ValidFrom is set
    /// to the approval timestamp, not the submission timestamp.</summary>
    Task<int> SubmitBetaEnrolRequestAsync(int clientId, string betaProgramName, DateTime validUntil, int requestedByClientUserId, CancellationToken ct);
    Task<int> SubmitBetaOptOutRequestAsync(int clientId, string betaProgramName, int requestedByClientUserId, CancellationToken ct);

    Task<string> ApproveChangeRequestAsync(int changeRequestId, int reviewerUserId, string? comments, CancellationToken ct);
    Task<string> RejectChangeRequestAsync(int changeRequestId, int reviewerUserId, string? comments, CancellationToken ct);

    /// <summary>clientId == -1 serves the admin approval inbox (any client); requestStatus == -1 = any.</summary>
    Task<PagedResult<ChangeRequestListDTO>> GetChangeRequestListAsync(int clientId, int requestStatus, int page, int pageSize, CancellationToken ct);
}