using System.Data.Common;
using System.Linq;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using CRMSalesDAL.DTO.Deal;
using CRMSalesDAL.Query.Deal;
using Newtonsoft.Json;

namespace CRMSalesDAL.CustomCode.Deal;

public class DealDAL : IDealDAL
{
    private readonly IQueryExecutor _QueryExecutor;
    private readonly IValidation _Validation;

    public DealDAL(IQueryExecutor queryExecutor, IValidation validation)
    {
        _QueryExecutor = queryExecutor;
        _Validation = validation;
    }

    public async Task<string> GetDeal(int dealId, LoginDTO loginDTO, CancellationToken ct)
    {
        try
        {
            var result = await _QueryExecutor
                .QuerySingleAsync<DealDTO>(loginDTO, DealQB.GET_DEAL, new { DealId = dealId }, cancellationToken: ct)
                .ConfigureAwait(false);
            return JsonConvert.SerializeObject(result);
        }
        catch
        {
            throw;
        }
    }

    public async Task<string> GetSelectListDeal(CriteriaDTO criteriaDTO, LoginDTO loginDTO, CancellationToken ct)
    {
        try
        {
            var result = await _QueryExecutor
                .QueryAsync<DealPicklistDTO>(loginDTO, DealQB.GET_SELECTLIST_DEAL, null!, cancellationToken: ct)
                .ConfigureAwait(false);
            return JsonConvert.SerializeObject(result);
        }
        catch
        {
            throw;
        }
    }

    public async Task<byte?> GetDealStage(int dealId, LoginDTO loginDTO, CancellationToken ct)
    {
        try
        {
            // QuerySingleOrDefaultAsync does not exist on IQueryExecutor (per GB5Solution/CLAUDE.md) —
            // QueryAsync<T> + FirstOrDefault() is the mandated substitute for an optional single row.
            var rows = await _QueryExecutor
                .QueryAsync<byte>(loginDTO, DealQB.GET_DEAL_STAGE, new { DealId = dealId }, cancellationToken: ct)
                .ConfigureAwait(false);
            var list = rows.ToList();
            return list.Count > 0 ? list[0] : (byte?)null;
        }
        catch
        {
            throw;
        }
    }

    public async Task<int> SaveDeal(DealDTO dealDTO, LoginDTO loginDTO, DbTransaction tx, CancellationToken ct)
    {
        try
        {
            return await _QueryExecutor
                .ExecuteAsync(loginDTO, DealQB.SAVE_DEAL, dealDTO, tx, ct)
                .ConfigureAwait(false);
        }
        catch (Exception ex)
        {
            string error = await _Validation.HandleException(ex, ErrorResponse.SaveErrorMessage);
            throw new Exception(error);
        }
    }

    public async Task<int> UpdateDeal(DealDTO dealDTO, LoginDTO loginDTO, DbTransaction tx, CancellationToken ct)
    {
        try
        {
            return await _QueryExecutor
                .ExecuteAsync(loginDTO, DealQB.UPDATE_DEAL, dealDTO, tx, ct)
                .ConfigureAwait(false);
        }
        catch (Exception ex)
        {
            string error = await _Validation.HandleException(ex, ErrorResponse.UpdateErrorMessage);
            throw new Exception(error);
        }
    }

    public async Task<string> DeleteDeal(int dealId, LoginDTO loginDTO, CancellationToken ct)
    {
        try
        {
            int result = await _QueryExecutor
                .ExecuteAsync(loginDTO, DealQB.DELETE_DEAL, new { DealId = dealId }, cancellationToken: ct)
                .ConfigureAwait(false);

            return result > 0 ? SuccessResponse.DeleteSuccessMessage : ErrorResponse.DeleteNotFoundMessage;
        }
        catch (Exception ex)
        {
            string error = await _Validation.HandleException(ex, ErrorResponse.DeleteErrorMessage);
            throw new Exception(error);
        }
    }
}