using ComplianceDAL.DTO.AdapterConfig;
using ComplianceDAL.DTO.GSTEInvoice;
using ComplianceDAL.DTO.GSTReturn;

namespace ComplianceBLL.Adapter;

public interface IComplianceAdapter
{
    // Auth — OTP request then exchange for auth token. GSTHeaderDTO bundles Username/GSTIN (and, for
    // the Returns family below, StateCode/AuthToken/Sek/EvcOTP) — matches GB4's GSTCafeServiceBLL,
    // which threads one GSTHeaderDTO through every GST Returns call instead of loose params.
    Task<AdapterAuthResult> RequestOTPAsync(GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);
    Task<AdapterAuthResult> GetAuthTokenAsync(string otp, GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);

    // E-Invoice
    Task<EInvoicePortalResponseDTO> GenerateEInvoiceAsync(string payloadJson, string gstin, string authToken, string sek, AdapterConfigDTO config, CancellationToken ct);
    Task<EInvoicePortalResponseDTO> CancelEInvoiceAsync(string irn, int cancelReasonType, string reason, string gstin, string authToken, string sek, AdapterConfigDTO config, CancellationToken ct);

    // E-Way Bill
    Task<AdapterCallResult> GenerateEWayBillAsync(string payloadJson, string gstin, string authToken, string sek, AdapterConfigDTO config, CancellationToken ct);
    Task<AdapterCallResult> CancelEWayBillAsync(string ewbNumber, int cancelReasonType, string reason, string gstin, string authToken, string sek, AdapterConfigDTO config, CancellationToken ct);
    Task<AdapterCallResult> UpdateVehicleAsync(string payloadJson, string gstin, string authToken, string sek, AdapterConfigDTO config, CancellationToken ct);
    // Matches GB4's GSTGovtSwitchFrameDAL.GenerateEWayFromIRN — a different GSP endpoint/response
    // shape from GenerateEWayBillAsync, used to generate an e-way bill directly off an already-generated IRN.
    Task<AdapterCallResult> GenerateEWayBillFromIRNAsync(string payloadJson, string gstin, string authToken, string sek, AdapterConfigDTO config, CancellationToken ct);

    // Returns — header.EvcOTP carries the file-step EVC OTP (a different concept from the OTP used to
    // obtain header.AuthToken/Sek above), matching GB4's GSTHeaderDTO.EvcOTP on FileGSTR1/FileGSTR3B.
    // header.ReturnPeriod carries GB4's LoginDTO.FP ("ret_period") — no separate returnPeriod param.
    Task<AdapterCallResult> SaveReturnAsync(string returnType, string payloadJson, GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);
    Task<AdapterCallResult> SubmitReturnAsync(string returnType, GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);
    Task<AdapterCallResult> FileReturnAsync(string returnType, GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);
    Task<AdapterCallResult> GetReturnStatusAsync(string referenceId, GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);

    // Inward fetch (2A/2B)
    Task<AdapterCallResult> FetchInwardDataAsync(string action, GSTHeaderDTO header, AdapterConfigDTO config, CancellationToken ct);
}

public class AdapterAuthResult
{
    public bool IsSuccess { get; set; }
    public string AuthToken { get; set; } = string.Empty;
    public string Sek { get; set; } = string.Empty;         // session encryption key
    // Raw (unencrypted) app-key generated by RequestOTPAsync — the caller must echo this back as
    // header.AppKey on the following GetAuthTokenAsync call (GSTN Authentication API spec: the
    // app-key is generated once per OTP request and reused to encrypt the OTP and decrypt the sek).
    public string AppKey { get; set; } = string.Empty;
    public string ErrorCode { get; set; } = string.Empty;
    public string ErrorMessage { get; set; } = string.Empty;
    public int HttpStatusCode { get; set; }
    public string RawResponse { get; set; } = string.Empty;
}

public class AdapterCallResult
{
    public bool IsSuccess { get; set; }
    public string ReferenceId { get; set; } = string.Empty;
    public string StatusCode { get; set; } = string.Empty;  // portal status_cd
    public string Body { get; set; } = string.Empty;
    public string ErrorCode { get; set; } = string.Empty;
    public string ErrorMessage { get; set; } = string.Empty;
    public int HttpStatusCode { get; set; }
    public string RawResponse { get; set; } = string.Empty;
}