using ComplianceBLL.ComplianceAnalytics;
using FastEndpoints;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.DTO.Report;
using GB5Shared.FastEndPoint;
using static GB5Shared.GB5Constant.Constant;

namespace ComplianceSL.Endpoints.ComplianceAnalytics;

// POST wrapper over GetFilingStatusSummary (Compliance & Audit Dashboard, Finance Analytics
// Dashboards Phase 3) -- the BI Catalog ApiService bridge (ExcelExport.ReportURICalling) always
// POSTs a ReportCallingDTO{CriteriaDTO} body, unconditionally, regardless of MWEBSERVICE.METHODTYPE.
// The existing GetFilingStatusSummary is a plain GET with query params, so it can't be bridged
// as-is -- this wrapper accepts the bridge's POST/CriteriaDTO contract and calls the same BLL
// method underneath. PeriodYear/GSTIN are parsed from CriteriaDTO the same way BRSDashboard parses
// BankAccountIds -- this is dashboard-bridge-specific criteria, not shared across the report family.
public class PostFilingStatusSummaryForDashboard
    : BaseEndpoint<PostFilingStatusSummaryForDashboard.Params, ResponseStandardDTO<object>>
{
    private readonly IComplianceAnalyticsBLL _bll;

    public PostFilingStatusSummaryForDashboard(IComplianceAnalyticsBLL bll) => _bll = bll;

    public override void Configure()
    {
        Post("/ComplianceAnalytics/GetFilingStatusSummaryForDashboard");
        AllowAnonymous();
    }

    public record Params(
        [property: FromHeader] string Login,
        [property: FromBody] ReportCallingDTO ReportCallingDTO
    );

    protected override string? GetCacheKey(Params req, LoginDTO login) => null;

    private static (int PeriodYear, string GSTIN) ParseCriteria(CriteriaDTO? criteriaDTO)
    {
        int periodYear = DateTime.UtcNow.Year;
        string gstin = "";
        if (criteriaDTO?.SectionCriteriaList == null) return (periodYear, gstin);
        foreach (var section in criteriaDTO.SectionCriteriaList)
        {
            if (section.AttributesCriteriaList == null) continue;
            foreach (var attr in section.AttributesCriteriaList)
            {
                if (attr.FieldValue == null) continue;
                var field = attr.FieldName?.ToLowerInvariant();
                if (field == "periodyear" && int.TryParse(attr.FieldValue.ToString(), out var y))
                    periodYear = y;
                else if (field == "gstin")
                    gstin = attr.FieldValue.ToString() ?? "";
            }
        }
        return (periodYear, gstin);
    }

    protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
        Params req, LoginDTO login, CancellationToken ct)
    {
        try
        {
            var (periodYear, gstin) = ParseCriteria(req.ReportCallingDTO.CriteriaDTO);
            var result = await _bll.GetFilingStatusSummaryAsync(periodYear, gstin, login, ct).ConfigureAwait(false);
            return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(result, CacheKeyLevel.CLIENT_LEVEL, login);
        }
        catch (Exception ex)
        {
            return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(ex, CacheKeyLevel.CLIENT_LEVEL, login, ex.Message, 500);
        }
    }
}