using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using FrameworkDAL.DTO.Workflow;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using static GB5Shared.DTO.WorkFlow.ContractsDTO;
using WorkflowDTO = FrameworkDAL.DTO.Workflow.WorkflowDTO;

namespace FrameworkBLL.WorkFlow
{
    public interface IWorkFlowBLL
    {
        // ── Workflow engine ───────────────────────────────────────────────────

        Task<WorkflowPreCheckResult> CheckApplicability(
            WorkflowCheckContext context,
            LoginDTO loginDTO);

        Task<WorkflowStartResult> StartWorkflow(
            WorkflowStartRequest request,
            LoginDTO loginDTO);

        // ── Actions ───────────────────────────────────────────────────────────

        Task<WorkFlowActionResponseDTO> WorkFlowActions(WorkFlowActionDTO WorkFlowActionDTO, LoginDTO LoginDTO);

        // ── Approval lists ────────────────────────────────────────────────────

        Task<List<WorkflowApprovalListDTO>> WorkFlowApprovalList(int WorkflowType, int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO);

        // ── History and status ────────────────────────────────────────────────

        Task<List<WorkflowStatusDTO>>      WorkFlowStatus(CriteriaDTO CriteriaDTO, LoginDTO LoginDTO);
        Task<List<WorkflowHistoryListDTO>> WorkFlowHistory(int WorkflowType, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO);

        Task<List<WorkflowStatusDTO>> CurrentApprovalStatus(
            int entityId,
            int objectId,
            LoginDTO loginDTO);

        // ── Auto-approve ─────────────────────────────────────────────────────

        /// <summary>
        /// Queries all overdue auto-approve tasks and calls WorkFlowActions for each.
        /// Called by the background WorkflowAutoApproveService.
        /// </summary>
        Task ProcessAutoApprovalsAsync(LoginDTO systemLogin, CancellationToken cancellationToken);

        // ── Monitor dashboard ─────────────────────────────────────────────────

        Task<string> GetWorkflowMonitorSummaryAsync(
            int entityId, DateTime? dateFrom, DateTime? dateTo,
            int page, int pageSize,
            LoginDTO loginDTO);

        // ── Workflow CRUD ─────────────────────────────────────────────────────

        Task<string> GetWorkflow(int WorkflowId, LoginDTO LoginDTO);
        Task<string> SaveWorkflow(WorkflowDTO WorkflowDTO, LoginDTO LoginDTO);
        Task<string> DeleteWorkflow(int WorkflowId, LoginDTO LoginDTO);
        Task<string> GetSelectListWorkflow(CriteriaDTO criteriaDTO, LoginDTO LoginDTO);
    }
}