using FastEndpoints;
using FrameworkBLL.WorkFlow;
using FrameworkDAL.DTO.Workflow;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using GB5Shared.WorkFlow.WorkFlowEngine;
using static FrameworkDAL.Constant.Constant;

namespace FrameworkSL.Endpoints.WorkFlow
{
    /// <summary>
    /// POST /WorkFlow/WorkFlowActions
    ///
    /// Processes one or more approver actions (Approve / Reject / Return / Escalate).
    ///
    /// Request body — <see cref="WorkFlowActionDTO"/>:
    ///   Items[].TaskId   — TWORKFLOWTASK.WORKFLOWTASKID
    ///   Items[].Action   — 0=Submit 1=Approve 2=Reject 3=Return 4=Escalate
    ///   Items[].Comment  — Optional comment
    ///   Items[].Facts    — Runtime key/value pairs for next-step condition evaluation
    /// </summary>
    public class WorkFlowActions
        : BaseEndpoint<WorkFlowActions.WorkFlowActionsParameters, ResponseStandardDTO<object>>
    {
        private readonly IWorkFlowBLL _bll;

        public WorkFlowActions(IWorkFlowBLL bll) => _bll = bll;

        public override void Configure()
        {
            Post("/WorkFlow/WorkFlowActions");
            AllowAnonymous();
        }

        public record WorkFlowActionsParameters(
            [property: FromHeader] string Login,
            [property: FromBody]   WorkFlowActionDTO WorkFlowActionDTO
        );

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

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            WorkFlowActionsParameters req,
            LoginDTO login,
            CancellationToken ct)
        {
            try
            {
                var result = await _bll.WorkFlowActions(req.WorkFlowActionDTO, login);
                return await GB5Shared.ResponseStandard.Response
                    .CreateSuccessResponse(result, CacheKeyLevel.NotRequired, login);
            }
            catch (WorkflowEngineException ex)
            {
                // Business / configuration error — surface exact message to caller
                return await GB5Shared.ResponseStandard.Response
                    .CreateExceptionError<string>(ex, CacheKeyLevel.NotRequired,
                        login, ex.Message, 400);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response
                    .CreateExceptionError<string>(ex, CacheKeyLevel.NotRequired,
                        login, ex.Message, 500);
            }
        }
    }
}