namespace ComplianceDAL.DTO.GSTOutward;

public class GSTOutwardDTO
{
    public int OutwardId { get; set; }
    // Nullable: TGST_OUTWARD.ARTIFACTID is a nullable FK to TCOMPLIANCE_ARTIFACT — SyncGSTOutwardAsync
    // never creates an artifact row (that's the E-Invoice/E-Way Bill flow's job), so this stays null
    // for ERP-synced rows. A non-nullable int here previously defaulted to 0, which violated the FK
    // the moment a real UPSERT ran (0 is not a valid TCOMPLIANCE_ARTIFACT.ARTIFACTID under IDENTITY).
    public int? ArtifactId { get; set; }
    public string GSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public int SourceDocumentId { get; set; }
    public string InvoiceNumber { get; set; } = string.Empty;
    public DateTime? InvoiceDate { get; set; }
    public decimal InvoiceValue { get; set; }
    public string ReceiverGSTIN { get; set; } = string.Empty;
    public string ReceiverName { get; set; } = string.Empty;
    public string POS { get; set; } = string.Empty;
    public string SupplyType { get; set; } = string.Empty;
    public string InvoiceType { get; set; } = "B2B";
    public string HSNCode { get; set; } = string.Empty;
    public string UOM { get; set; } = string.Empty;
    public decimal Quantity { get; set; }
    public decimal TaxableValue { get; set; }
    public decimal IGSTRate { get; set; }
    public decimal IGSTAmount { get; set; }
    public decimal CGSTRate { get; set; }
    public decimal CGSTAmount { get; set; }
    public decimal SGSTRate { get; set; }
    public decimal SGSTAmount { get; set; }
    public decimal CessRate { get; set; }
    public decimal CessAmount { get; set; }
    public int FilingStatus { get; set; }
    public string AckReferenceNumber { get; set; } = string.Empty;
    public int? OriginalOutwardId { get; set; }
    public int ClientId { get; set; }
    public string DatabaseName { get; set; } = string.Empty;
    public int CreatedById { get; set; }
    public DateTime CreatedOn { get; set; }
    public int? ModifiedById { get; set; }
    public DateTime? ModifiedOn { get; set; }
}

public class SyncGSTOutwardRequestDTO
{
    public string GSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;  // MMYYYY
    public bool ForceResync { get; set; }
    public int OUId { get; set; }        // 0 = all OUs (default, unchanged behavior)
    public int CompanyId { get; set; }   // 0 = all companies (default, unchanged behavior)
}

public class GSTOutwardFilterDTO
{
    public string GSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public string InvoiceType { get; set; } = string.Empty;
    public int FilingStatus { get; set; } = -1;
    public int Page { get; set; } = 1;
    public int PageSize { get; set; } = 50;
}

public class SubmitGSTOutwardRequestDTO
{
    public string GSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
}

public class FileGSTReturnRequestDTO
{
    public string GSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public string ReturnType { get; set; } = "GSTR1";
    public string EVCOtp { get; set; } = string.Empty;
}

// GSTR-1 preview sections
public class GSTR1PreviewDTO
{
    public string GSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public List<GSTR1B2BDTO> B2B { get; set; } = [];
    public List<GSTR1B2CLDTO> B2CL { get; set; } = [];
    public List<GSTR1B2CSDTO> B2CS { get; set; } = [];
    public List<GSTR1EXPDTO> EXP { get; set; } = [];
    public List<GSTR1CDNRDTO> CDNR { get; set; } = [];
    public List<GSTR1HSNDTO> HSN { get; set; } = [];
    public GSTR1NilDTO NIL { get; set; } = new();
    public GSTR1SummaryDTO Summary { get; set; } = new();
}

public class GSTR1B2BDTO
{
    public string ReceiverGSTIN { get; set; } = string.Empty;
    public string ReceiverName { get; set; } = string.Empty;
    public List<GSTR1InvoiceDTO> Invoices { get; set; } = [];
}

public class GSTR1B2CLDTO
{
    public string POS { get; set; } = string.Empty;
    public List<GSTR1InvoiceDTO> Invoices { get; set; } = [];
}

public class GSTR1B2CSDTO
{
    public string POS { get; set; } = string.Empty;
    public string SupplyType { get; set; } = string.Empty;
    public decimal IGSTRate { get; set; }
    public decimal CGSTRate { get; set; }
    public decimal SGSTRate { get; set; }
    public decimal TaxableValue { get; set; }
    public decimal IGSTAmount { get; set; }
    public decimal CGSTAmount { get; set; }
    public decimal SGSTAmount { get; set; }
    public decimal CessAmount { get; set; }
}

public class GSTR1InvoiceDTO
{
    public string InvoiceNumber { get; set; } = string.Empty;
    public DateTime? InvoiceDate { get; set; }
    public decimal InvoiceValue { get; set; }
    public string POS { get; set; } = string.Empty;
    public decimal TaxableValue { get; set; }
    public decimal IGSTRate { get; set; }
    public decimal IGSTAmount { get; set; }
    public decimal CGSTRate { get; set; }
    public decimal CGSTAmount { get; set; }
    public decimal SGSTRate { get; set; }
    public decimal SGSTAmount { get; set; }
    public decimal CessRate { get; set; }
    public decimal CessAmount { get; set; }
}

public class GSTR1EXPDTO
{
    public string ExportType { get; set; } = "WPAY";  // WPAY/WOPAY
    public List<GSTR1InvoiceDTO> Invoices { get; set; } = [];
}

public class GSTR1CDNRDTO
{
    public string ReceiverGSTIN { get; set; } = string.Empty;
    public List<GSTR1NoteDTO> Notes { get; set; } = [];
}

public class GSTR1NoteDTO
{
    public string NoteType { get; set; } = "C";  // C=Credit, D=Debit
    public string NoteNumber { get; set; } = string.Empty;
    public DateTime? NoteDate { get; set; }
    public decimal NoteValue { get; set; }
    public decimal TaxableValue { get; set; }
    public decimal IGSTAmount { get; set; }
    public decimal CGSTAmount { get; set; }
    public decimal SGSTAmount { get; set; }
    public decimal CessAmount { get; set; }
}

public class GSTR1HSNDTO
{
    public string HSNCode { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public string UOM { get; set; } = string.Empty;
    public decimal Quantity { get; set; }
    public decimal TotalValue { get; set; }
    public decimal TaxableValue { get; set; }
    public decimal IGSTAmount { get; set; }
    public decimal CGSTAmount { get; set; }
    public decimal SGSTAmount { get; set; }
    public decimal CessAmount { get; set; }
}

public class GSTR1NilDTO
{
    public decimal NilSupplies { get; set; }
    public decimal ExemptSupplies { get; set; }
    public decimal NonGSTSupplies { get; set; }
}

public class GSTR1SummaryDTO
{
    public int TotalInvoices { get; set; }
    public decimal TotalTaxableValue { get; set; }
    public decimal TotalIGST { get; set; }
    public decimal TotalCGST { get; set; }
    public decimal TotalSGST { get; set; }
    public decimal TotalCess { get; set; }
    public decimal TotalInvoiceValue { get; set; }
}