using DigitalData.Core.Abstraction.Application.Repository;
using DigitalData.Core.Exceptions;
using MediatR;
using Microsoft.Data.SqlClient;
using Microsoft.Extensions.Options;
using ReC.Application.Common.Exceptions;
using ReC.Application.Common.Options;
using System.Text;

namespace ReC.Application.Common.Procedures.DeleteProcedure;

public record DeleteObjectProcedure : IRequest<int>
{
    /// <summary>
    /// Target entity: ACTION, ENDPOINT, ENDPOINT_AUTH, ENDPOINT_PARAMS, PROFILE, RESULT
    /// </summary>
    public string Entity { get; set; } = null!;

    /// <summary>
    /// Start GUID/ID (inclusive)
    /// </summary>
    public long Start { get; set; }

    /// <summary>
    /// End GUID/ID (inclusive). If 0, will be set to Start value.
    /// </summary>
    public long End { get; set; }

    /// <summary>
    /// If true, delete even if dependent data exists
    /// </summary>
    public bool Force { get; set; }
}

public class DeleteObjectProcedureHandler(IRepository repo, IOptionsMonitor<SqlExceptionOptions> sqlExOpt) : IRequestHandler<DeleteObjectProcedure, int>
{
    public async Task<int> Handle(DeleteObjectProcedure request, CancellationToken cancel)
    {
        var parameters = new[]
        {
            new SqlParameter("@pENTITY", request.Entity ?? (object)DBNull.Value),
            new SqlParameter("@pSTART", request.Start.ToString()),
            new SqlParameter("@pEND", request.End.ToString()),
            new SqlParameter("@pFORCE", (object?)request.Force ?? DBNull.Value)
        };

        try
        {
            var sql = new StringBuilder()
                .AppendLine("DECLARE @RC SMALLINT = 0;")
                .AppendLine("EXEC @RC = [dbo].[PRREC_DELETE_OBJECT]")
                .AppendLine("    @pENTITY = @pENTITY,")
                .AppendLine("    @pSTART = @pSTART,")
                .AppendLine("    @pEND = @pEND,")
                .AppendLine("    @pFORCE = @pFORCE;")
                .AppendLine("SELECT @RC;")
                .ToString();

            var result = await repo.ExecuteQueryRawAsync(sql, parameters, cancel);

            // The stored procedure returns 0 on success, error codes > 0 on failure
            if (result > 0)
            {
                throw new DeleteObjectFailedException(request, $"DeleteObject stored procedure failed with error code: {result}");
            }

            return result;
        }
        catch (SqlException ex)
        {
            if (sqlExOpt.CurrentValue.BadRequestSqlExceptionNumbers.Contains(ex.Number))
                throw new BadRequestException(ex.Message, ex);
            else
                throw;
        }
    }
}