namespace ComplianceDAL.DTO.GSTInward;

public class GSTInwardDTO
{
    public int InwardId { get; set; }
    public string SupplierGSTIN { get; set; } = string.Empty;
    public string SupplierName { get; set; } = string.Empty;
    public string OurGSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public string InvoiceNumber { get; set; } = string.Empty;
    public DateTime? InvoiceDate { get; set; }
    public decimal InvoiceValue { 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 bool ITCEligible { get; set; } = true;
    public string AcceptanceStatus { get; set; } = "Pending";
    public string Source { get; set; } = "2B";
    public int SourceDocumentId { get; set; }
    public int? MatchedDocumentId { get; set; }
    public string MatchedEntityType { get; set; } = string.Empty;
    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 GSTReconDTO
{
    public int ReconId { get; set; }
    public string ReconType { get; set; } = string.Empty;
    public string Period { get; set; } = string.Empty;
    public string OurGSTIN { get; set; } = string.Empty;
    public int? InwardId { get; set; }
    public int? OutwardId { get; set; }
    public string Status { get; set; } = "Pending";
    public decimal DiffTaxableValue { get; set; }
    public decimal DiffIGST { get; set; }
    public decimal DiffCGST { get; set; }
    public decimal DiffSGST { get; set; }
    public decimal DiffCess { get; set; }
    public string Notes { get; set; } = string.Empty;
    public int? ResolvedById { get; set; }
    public DateTime? ResolvedOn { get; set; }
    public int ClientId { get; set; }
    public string DatabaseName { get; set; } = string.Empty;
    public int CreatedById { get; set; }
    public DateTime CreatedOn { get; set; }

    // Join fields for reconciliation view
    public string SupplierGSTIN { get; set; } = string.Empty;
    public string SupplierName { get; set; } = string.Empty;
    public string InvoiceNumber { get; set; } = string.Empty;
    public DateTime? InvoiceDate { get; set; }
    public decimal PortalTaxableValue { get; set; }
    public decimal PortalIGST { get; set; }
    public decimal PortalCGST { get; set; }
    public decimal PortalSGST { get; set; }
    public int? MatchedDocumentId { get; set; }
}

// Request DTOs
public class SyncFromPortalRequestDTO
{
    public string OurGSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;  // MMYYYY
    public string Source { get; set; } = "2B";  // 2A or 2B
    public bool ForceResync { get; set; }
}

public class GSTInwardFilterDTO
{
    public string OurGSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public string SupplierGSTIN { get; set; } = string.Empty;
    public string Source { get; set; } = string.Empty;
    public string AcceptanceStatus { get; set; } = string.Empty;
    public int Page { get; set; } = 1;
    public int PageSize { get; set; } = 50;
}

public class GSTReconFilterDTO
{
    public string OurGSTIN { get; set; } = string.Empty;
    public string Period { get; set; } = string.Empty;
    public string ReconType { get; set; } = "InwardVs2B";
    public string Status { get; set; } = string.Empty;
    public int Page { get; set; } = 1;
    public int PageSize { get; set; } = 50;
}

// Import: flat list of inward records (pre-parsed from portal or CSV)
public class GSTInwardImportDTO
{
    public string SupplierGSTIN { get; set; } = string.Empty;
    public string SupplierName { get; set; } = string.Empty;
    public string OurGSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public string InvoiceNumber { get; set; } = string.Empty;
    public DateTime? InvoiceDate { get; set; }
    public decimal InvoiceValue { 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 bool ITCEligible { get; set; } = true;
    public string Source { get; set; } = "2B";
}

public class ImportGSTInwardRequestDTO
{
    public List<GSTInwardImportDTO> Records { get; set; } = [];
}

// Generate: read purchase documents straight from the ERP for OU/GSTIN/Company/Period — no FE
// round-trip. Single ReturnPeriod (not a date range): the ITC claim period is a business decision,
// not derivable from the supplier invoice's own date, so it must stay a single-period concept like
// every other period-based method in this module (SyncFromPortalAsync, RunReconciliationAsync, etc).
public class GenerateGSTInwardBatchRequestDTO
{
    public int OUId { get; set; }        // 0 = all OUs
    public int CompanyId { get; set; }   // 0 = all companies
    public string OurGSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;  // MMYYYY
    public bool ForceResync { get; set; }
}

public class ReconResolutionDTO
{
    public int ReconId { get; set; }
    public string Status { get; set; } = string.Empty;  // Accepted/Resolved/Rejected
    public int? MatchedDocumentId { get; set; }
    public string MatchedEntityType { get; set; } = "PurchaseInvoice";
    public string Notes { get; set; } = string.Empty;
}

public class RunReconciliationRequestDTO
{
    public string OurGSTIN { get; set; } = string.Empty;
    public string ReturnPeriod { get; set; } = string.Empty;
    public string ReconType { get; set; } = "InwardVs2B";
}

// Summary row for reconciliation dashboard
public class ReconSummaryDTO
{
    public string ReconType { get; set; } = string.Empty;
    public string Period { get; set; } = string.Empty;
    public string OurGSTIN { get; set; } = string.Empty;
    public int TotalRecords { get; set; }
    public int Matched { get; set; }
    public int Mismatch { get; set; }
    public int MissingInPortal { get; set; }
    public int MissingInERP { get; set; }
    public int Resolved { get; set; }
    public decimal TotalDiffIGST { get; set; }
    public decimal TotalDiffCGST { get; set; }
    public decimal TotalDiffSGST { get; set; }
}