using Marco.Pms.DataAccess.Data;
using Marco.Pms.Model.Dtos.Project;
using Marco.Pms.Model.Employees;
using Marco.Pms.Model.Entitlements;
using Marco.Pms.Model.Mapper;
using Marco.Pms.Model.MongoDBModels;
using Marco.Pms.Model.Projects;
using Marco.Pms.Model.Utilities;
using Marco.Pms.Model.ViewModels.Projects;
using Marco.Pms.Services.Helpers;
using Marco.Pms.Services.Service;
using Marco.Pms.Services.Service.ServiceInterfaces;
using MarcoBMS.Services.Helpers;
using MarcoBMS.Services.Service;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.CodeAnalysis;
using Microsoft.EntityFrameworkCore;
using MongoDB.Driver;
using Project = Marco.Pms.Model.Projects.Project;

namespace MarcoBMS.Services.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    [Authorize]
    public class ProjectController : ControllerBase
    {
        private readonly IProjectServices _projectServices;
        private readonly ApplicationDbContext _context;
        private readonly UserHelper _userHelper;
        private readonly ILoggingService _logger;
        private readonly ISignalRService _signalR;
        private readonly PermissionServices _permission;
        private readonly CacheUpdateHelper _cache;
        private readonly Guid tenantId;


        public ProjectController(
            ApplicationDbContext context,
            UserHelper userHelper,
            ILoggingService logger,
            ISignalRService signalR,
            CacheUpdateHelper cache,
            PermissionServices permission,
            IProjectServices projectServices)
        {
            _context = context;
            _userHelper = userHelper;
            _logger = logger;
            _signalR = signalR;
            _cache = cache;
            _permission = permission;
            _projectServices = projectServices;
            tenantId = userHelper.GetTenantId();
        }

        #region =================================================================== Project Get APIs ===================================================================

        [HttpGet("list/basic")]
        public async Task<IActionResult> GetAllProjectsBasic()
        {
            // Get the current user
            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.GetAllProjectsBasicAsync(tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);
        }

        /// <summary>
        /// Retrieves a list of projects accessible to the current user, including aggregated details.
        /// This method is optimized to use a cache-first approach. If data is not in the cache,
        /// it fetches and aggregates data efficiently from the database in parallel.
        /// </summary>
        /// <returns>An ApiResponse containing a list of projects or an error.</returns>

        [HttpGet("list")]
        public async Task<IActionResult> GetAllProjects()
        {
            // --- Input Validation and Initial Setup ---
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values
                    .SelectMany(v => v.Errors)
                    .Select(e => e.ErrorMessage)
                    .ToList();
                _logger.LogWarning("GetAllProjects called with invalid model state. Errors: {Errors}", string.Join(", ", errors));
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid request data provided.", errors, 400));
            }
            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.GetAllProjectsAsync(tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);
        }

        /// <summary>
        /// Retrieves details for a specific project by its ID.
        /// This endpoint is optimized with a cache-first strategy and parallel permission checks.
        /// </summary>
        /// <param name="id">The unique identifier of the project.</param>
        /// <returns>An ApiResponse containing the project details or an appropriate error.</returns>

        [HttpGet("get/{id}")]
        public async Task<IActionResult> GetProject([FromRoute] Guid id)
        {
            // --- Step 1: Input Validation ---
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values.SelectMany(v => v.Errors).Select(e => e.ErrorMessage).ToList();
                _logger.LogWarning("Get project called with invalid model state for ID {ProjectId}. Errors: {Errors}", id, string.Join(", ", errors));
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid request data provided.", errors, 400));
            }

            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.GetProjectAsync(id, tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);
        }


        [HttpGet("details/{id}")]
        public async Task<IActionResult> GetProjectDetails([FromRoute] Guid id)
        {
            // Step 1: Validate model state
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values
                    .SelectMany(v => v.Errors)
                    .Select(e => e.ErrorMessage)
                    .ToList();

                _logger.LogWarning("Invalid model state in Details endpoint. Errors: {@Errors}", errors);
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid data", errors, 400));
            }

            // Step 2: Get logged-in employee
            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            var response = await _projectServices.GetProjectDetailsAsync(id, tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);
        }

        [HttpGet("details-old/{id}")]
        public async Task<IActionResult> GetProjectDetailsOld([FromRoute] Guid id)
        {
            // ProjectDetailsVM vm = new ProjectDetailsVM();

            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values
                    .SelectMany(v => v.Errors)
                    .Select(e => e.ErrorMessage)
                    .ToList();
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid data", errors, 400));

            }

            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            var response = await _projectServices.GetProjectDetailsAsync(id, tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);

        }

        #endregion

        #region =================================================================== Project Manage APIs ===================================================================

        [HttpPost]
        public async Task<IActionResult> CreateProject([FromBody] CreateProjectDto projectDto)
        {
            // 1. Validate input first (early exit)
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values.SelectMany(v => v.Errors).Select(e => e.ErrorMessage).ToList();
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid data", errors, 400));
            }

            // 2. Prepare data without I/O
            Employee loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.CreateProjectAsync(projectDto, tenantId, loggedInEmployee);
            if (response.Success)
            {
                var notification = new { LoggedInUserId = loggedInEmployee.Id, Keyword = "Create_Project", Response = response.Data };
                await _signalR.SendNotificationAsync(notification);
            }
            return StatusCode(response.StatusCode, response);
        }

        /// <summary>
        /// Updates an existing project's details.
        /// This endpoint is secure, handles concurrency, and performs non-essential tasks in the background.
        /// </summary>
        /// <param name="id">The ID of the project to update.</param>
        /// <param name="updateProjectDto">The data to update the project with.</param>
        /// <returns>An ApiResponse confirming the update or an appropriate error.</returns>

        [HttpPut("update/{id}")]
        public async Task<IActionResult> UpdateProject([FromRoute] Guid id, [FromBody] UpdateProjectDto updateProjectDto)
        {
            // --- Step 1: Input Validation ---
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values.SelectMany(v => v.Errors).Select(e => e.ErrorMessage).ToList();
                _logger.LogWarning("Update project called with invalid model state for ID {ProjectId}. Errors: {Errors}", id, string.Join(", ", errors));
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid request data provided.", errors, 400));
            }

            // --- Step 2: Prepare data without I/O ---
            Employee loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.UpdateProjectAsync(id, updateProjectDto, tenantId, loggedInEmployee);
            if (response.Success)
            {
                var notification = new { LoggedInUserId = loggedInEmployee.Id, Keyword = "Update_Project", Response = response.Data };
                await _signalR.SendNotificationAsync(notification);
            }
            return StatusCode(response.StatusCode, response);
        }

        #endregion

        #region =================================================================== Project Allocation APIs ===================================================================

        [HttpGet("employees/get/{projectid?}/{includeInactive?}")]
        public async Task<IActionResult> GetEmployeeByProjectId(Guid? projectId, bool includeInactive = false)
        {
            // --- Step 1: Input Validation ---
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values.SelectMany(v => v.Errors).Select(e => e.ErrorMessage).ToList();
                _logger.LogWarning("Get employee list by ProjectId called with invalid model state \n Errors: {Errors}", string.Join(", ", errors));
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid request data provided.", errors, 400));
            }

            // --- Step 2: Prepare data without I/O ---
            Employee loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.GetEmployeeByProjectIdAsync(projectId, includeInactive, tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);
        }

        [HttpGet("allocation/{projectId}")]
        public async Task<IActionResult> GetProjectAllocation(Guid? projectId)
        {
            // --- Step 1: Input Validation ---
            if (!ModelState.IsValid)
            {
                var errors = ModelState.Values.SelectMany(v => v.Errors).Select(e => e.ErrorMessage).ToList();
                _logger.LogWarning("Get employee list by ProjectId called with invalid model state \n Errors: {Errors}", string.Join(", ", errors));
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid request data provided.", errors, 400));
            }

            // --- Step 2: Prepare data without I/O ---
            Employee loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            var response = await _projectServices.GetProjectAllocationAsync(projectId, tenantId, loggedInEmployee);
            return StatusCode(response.StatusCode, response);
        }

        //[HttpPost("allocation")]
        //public async Task<IActionResult> ManageAllocation(List<ProjectAllocationDot> projectAllocationDot)
        //{
        //    // --- Step 1: Input Validation ---
        //    if (!ModelState.IsValid)
        //    {
        //        var errors = ModelState.Values.SelectMany(v => v.Errors).Select(e => e.ErrorMessage).ToList();
        //        _logger.LogWarning("Update project called with invalid model state for ID {ProjectId}. Errors: {Errors}", id, string.Join(", ", errors));
        //        return BadRequest(ApiResponse<object>.ErrorResponse("Invalid request data provided.", errors, 400));
        //    }

        //    // --- Step 2: Prepare data without I/O ---
        //    Employee loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
        //    var response = await _projectServices.UpdateProjectAsync(id, updateProjectDto, tenantId, loggedInEmployee);
        //    if (response.Success)
        //    {
        //        var notification = new { LoggedInUserId = loggedInEmployee.Id, Keyword = "Assign_Project", ProjectIds = projectIds, EmployeeList = employeeIds };
        //        await _signalR.SendNotificationAsync(notification);
        //    }
        //    return StatusCode(response.StatusCode, response);

        //}

        [HttpGet("assigned-projects/{employeeId}")]
        public async Task<IActionResult> GetProjectsByEmployee([FromRoute] Guid employeeId)
        {
            if (employeeId == Guid.Empty)
            {
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid details.", "Employee id not valid.", 400));
            }

            List<Guid> projectList = await _context.ProjectAllocations
                .Where(c => c.TenantId == tenantId && c.EmployeeId == employeeId && c.IsActive)
                .Select(c => c.ProjectId).Distinct()
                .ToListAsync();

            if (!projectList.Any())
            {
                return NotFound(ApiResponse<object>.SuccessResponse(new List<object>(), "No projects found.", 200));
            }


            List<Project> projectlist = await _context.Projects
                 .Where(p => projectList.Contains(p.Id))
                 .ToListAsync();

            List<ProjectListVM> projects = new List<ProjectListVM>();


            foreach (var project in projectlist)
            {

                projects.Add(project.ToProjectListVMFromProject());
            }



            return Ok(ApiResponse<object>.SuccessResponse(projects, "Success.", 200));
        }

        [HttpPost("assign-projects/{employeeId}")]
        public async Task<ActionResult> AssigneProjectsToEmployee([FromBody] List<ProjectsAllocationDto> projectAllocationDtos, [FromRoute] Guid employeeId)
        {
            if (projectAllocationDtos != null && employeeId != Guid.Empty)
            {
                var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
                List<object>? result = new List<object>();
                List<Guid> projectIds = new List<Guid>();

                foreach (var projectAllocationDto in projectAllocationDtos)
                {
                    try
                    {
                        ProjectAllocation projectAllocation = projectAllocationDto.ToProjectAllocationFromProjectsAllocationDto(tenantId, employeeId);
                        ProjectAllocation? projectAllocationFromDb = await _context.ProjectAllocations.Where(c => c.EmployeeId == employeeId && c.ProjectId == projectAllocationDto.ProjectId && c.ReAllocationDate == null && c.TenantId == tenantId).SingleOrDefaultAsync();

                        if (projectAllocationFromDb != null)
                        {


                            _context.ProjectAllocations.Attach(projectAllocationFromDb);

                            if (projectAllocationDto.Status)
                            {
                                projectAllocationFromDb.JobRoleId = projectAllocation.JobRoleId; ;
                                projectAllocationFromDb.IsActive = true;
                                _context.Entry(projectAllocationFromDb).Property(e => e.JobRoleId).IsModified = true;
                                _context.Entry(projectAllocationFromDb).Property(e => e.IsActive).IsModified = true;
                            }
                            else
                            {
                                projectAllocationFromDb.ReAllocationDate = DateTime.UtcNow;
                                projectAllocationFromDb.IsActive = false;
                                _context.Entry(projectAllocationFromDb).Property(e => e.ReAllocationDate).IsModified = true;
                                _context.Entry(projectAllocationFromDb).Property(e => e.IsActive).IsModified = true;

                                projectIds.Add(projectAllocation.ProjectId);
                            }
                            await _context.SaveChangesAsync();
                            var result1 = new
                            {
                                Id = projectAllocationFromDb.Id,
                                EmployeeId = projectAllocation.EmployeeId,
                                JobRoleId = projectAllocation.JobRoleId,
                                IsActive = projectAllocation.IsActive,
                                ProjectId = projectAllocation.ProjectId,
                                AllocationDate = projectAllocation.AllocationDate,
                                ReAllocationDate = projectAllocation.ReAllocationDate,
                                TenantId = projectAllocation.TenantId
                            };
                            result.Add(result1);
                        }
                        else
                        {
                            projectAllocation.AllocationDate = DateTime.Now;
                            projectAllocation.IsActive = true;
                            _context.ProjectAllocations.Add(projectAllocation);
                            await _context.SaveChangesAsync();

                            projectIds.Add(projectAllocation.ProjectId);

                        }


                    }
                    catch (Exception ex)
                    {

                        return Ok(ApiResponse<object>.ErrorResponse(ex.Message, ex, 400));
                    }
                }
                await _cache.ClearAllProjectIds(employeeId);
                var notification = new { LoggedInUserId = LoggedInEmployee.Id, Keyword = "Assign_Project", ProjectIds = projectIds, EmployeeId = employeeId };

                await _signalR.SendNotificationAsync(notification);

                return Ok(ApiResponse<object>.SuccessResponse(result, "Data saved successfully", 200));
            }
            else
            {
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid details.", "All Field is required", 400));
            }

        }

        #endregion

        #region =================================================================== Project InfraStructure Get APIs ===================================================================

        [HttpGet("infra-details/{projectId}")]
        public async Task<IActionResult> GetInfraDetails(Guid projectId)
        {
            _logger.LogInfo("GetInfraDetails called for ProjectId: {ProjectId}", projectId);

            // Step 1: Get logged-in employee
            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            // Step 2: Check project-specific permission
            var hasProjectPermission = await _permission.HasProjectPermission(loggedInEmployee, projectId);
            if (!hasProjectPermission)
            {
                _logger.LogWarning("Project access denied for EmployeeId: {EmployeeId} on ProjectId: {ProjectId}", loggedInEmployee.Id, projectId);
                return StatusCode(403, ApiResponse<object>.ErrorResponse("Access denied", "You don't have access to this project", 403));
            }

            // Step 3: Check 'ViewInfra' permission
            var hasViewInfraPermission = await _permission.HasPermission(PermissionsMaster.ViewProjectInfra, loggedInEmployee.Id);
            if (!hasViewInfraPermission)
            {
                _logger.LogWarning("ViewInfra permission denied for EmployeeId: {EmployeeId}", loggedInEmployee.Id);
                return StatusCode(403, ApiResponse<object>.ErrorResponse("Access denied", "You don't have access to view infra", 403));
            }
            var result = await _cache.GetBuildingInfra(projectId);
            if (result == null)
            {

                // Step 4: Fetch buildings for the project
                var buildings = await _context.Buildings
                    .Where(b => b.ProjectId == projectId)
                    .ToListAsync();

                var buildingIds = buildings.Select(b => b.Id).ToList();

                // Step 5: Fetch floors associated with the buildings
                var floors = await _context.Floor
                    .Where(f => buildingIds.Contains(f.BuildingId))
                    .ToListAsync();

                var floorIds = floors.Select(f => f.Id).ToList();

                // Step 6: Fetch work areas associated with the floors
                var workAreas = await _context.WorkAreas
                    .Where(wa => floorIds.Contains(wa.FloorId))
                    .ToListAsync();
                var workAreaIds = workAreas.Select(wa => wa.Id).ToList();

                // Step 7: Fetch work items associated with the work area
                var workItems = await _context.WorkItems
                    .Where(wi => workAreaIds.Contains(wi.WorkAreaId))
                    .ToListAsync();

                // Step 8: Build the infra hierarchy (Building > Floors > Work Areas)
                List<BuildingMongoDB> Buildings = new List<BuildingMongoDB>();
                foreach (var building in buildings)
                {
                    double buildingPlannedWorks = 0;
                    double buildingCompletedWorks = 0;

                    var selectedFloors = floors.Where(f => f.BuildingId == building.Id).ToList();
                    List<FloorMongoDB> Floors = new List<FloorMongoDB>();
                    foreach (var floor in selectedFloors)
                    {
                        double floorPlannedWorks = 0;
                        double floorCompletedWorks = 0;
                        var selectedWorkAreas = workAreas.Where(wa => wa.FloorId == floor.Id).ToList();
                        List<WorkAreaMongoDB> WorkAreas = new List<WorkAreaMongoDB>();
                        foreach (var workArea in selectedWorkAreas)
                        {
                            double workAreaPlannedWorks = 0;
                            double workAreaCompletedWorks = 0;
                            var selectedWorkItems = workItems.Where(wi => wi.WorkAreaId == workArea.Id).ToList();
                            foreach (var workItem in selectedWorkItems)
                            {
                                workAreaPlannedWorks += workItem.PlannedWork;
                                workAreaCompletedWorks += workItem.CompletedWork;
                            }
                            WorkAreaMongoDB workAreaMongo = new WorkAreaMongoDB
                            {
                                Id = workArea.Id.ToString(),
                                AreaName = workArea.AreaName,
                                PlannedWork = workAreaPlannedWorks,
                                CompletedWork = workAreaCompletedWorks
                            };
                            WorkAreas.Add(workAreaMongo);
                            floorPlannedWorks += workAreaPlannedWorks;
                            floorCompletedWorks += workAreaCompletedWorks;
                        }
                        FloorMongoDB floorMongoDB = new FloorMongoDB
                        {
                            Id = floor.Id.ToString(),
                            FloorName = floor.FloorName,
                            PlannedWork = floorPlannedWorks,
                            CompletedWork = floorCompletedWorks,
                            WorkAreas = WorkAreas
                        };
                        Floors.Add(floorMongoDB);
                        buildingPlannedWorks += floorPlannedWorks;
                        buildingCompletedWorks += floorCompletedWorks;
                    }

                    var buildingMongo = new BuildingMongoDB
                    {
                        Id = building.Id.ToString(),
                        BuildingName = building.Name,
                        Description = building.Description,
                        PlannedWork = buildingPlannedWorks,
                        CompletedWork = buildingCompletedWorks,
                        Floors = Floors
                    };
                    Buildings.Add(buildingMongo);
                }
                result = Buildings;
            }

            _logger.LogInfo("Infra details fetched successfully for ProjectId: {ProjectId}, EmployeeId: {EmployeeId}, Buildings: {Count}",
                projectId, loggedInEmployee.Id, result.Count);

            return Ok(ApiResponse<object>.SuccessResponse(result, "Infra details fetched successfully", 200));
        }

        [HttpGet("tasks/{workAreaId}")]
        public async Task<IActionResult> GetWorkItems(Guid workAreaId)
        {
            _logger.LogInfo("GetWorkItems called for WorkAreaId: {WorkAreaId}", workAreaId);

            // Step 1: Get the currently logged-in employee
            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            // Step 2: Check if the employee has ViewInfra permission
            var hasViewInfraPermission = await _permission.HasPermission(PermissionsMaster.ViewProjectInfra, loggedInEmployee.Id);
            if (!hasViewInfraPermission)
            {
                _logger.LogWarning("ViewInfra permission denied for EmployeeId: {EmployeeId}", loggedInEmployee.Id);
                return StatusCode(403, ApiResponse<object>.ErrorResponse("Access denied", "You don't have permission to view infrastructure", 403));
            }

            // Step 3: Check if the specified Work Area exists
            var isWorkAreaExist = await _context.WorkAreas.AnyAsync(wa => wa.Id == workAreaId);
            if (!isWorkAreaExist)
            {
                _logger.LogWarning("Work Area not found for WorkAreaId: {WorkAreaId}", workAreaId);
                return NotFound(ApiResponse<object>.ErrorResponse("Work Area not found", "Work Area not found in database", 404));
            }

            // Step 4: Fetch WorkItems with related Activity and Work Category data
            var workItemVMs = await _cache.GetWorkItemDetailsByWorkArea(workAreaId);
            if (workItemVMs == null)
            {
                var workItems = await _context.WorkItems
                    .Include(wi => wi.ActivityMaster)
                    .Include(wi => wi.WorkCategoryMaster)
                    .Where(wi => wi.WorkAreaId == workAreaId)
                    .ToListAsync();

                workItemVMs = workItems.Select(wi => new WorkItemMongoDB
                {
                    Id = wi.Id.ToString(),
                    WorkAreaId = wi.WorkAreaId.ToString(),
                    ParentTaskId = wi.ParentTaskId.ToString(),
                    ActivityMaster = new ActivityMasterMongoDB
                    {
                        Id = wi.ActivityId.ToString(),
                        ActivityName = wi.ActivityMaster != null ? wi.ActivityMaster.ActivityName : null,
                        UnitOfMeasurement = wi.ActivityMaster != null ? wi.ActivityMaster.UnitOfMeasurement : null
                    },
                    WorkCategoryMaster = new WorkCategoryMasterMongoDB
                    {
                        Id = wi.WorkCategoryId.ToString() ?? "",
                        Name = wi.WorkCategoryMaster != null ? wi.WorkCategoryMaster.Name : "",
                        Description = wi.WorkCategoryMaster != null ? wi.WorkCategoryMaster.Description : ""
                    },
                    PlannedWork = wi.PlannedWork,
                    CompletedWork = wi.CompletedWork,
                    Description = wi.Description,
                    TaskDate = wi.TaskDate,
                }).ToList();

                await _cache.ManageWorkItemDetails(workItems);
            }

            _logger.LogInfo("{Count} work items fetched successfully for WorkAreaId: {WorkAreaId}", workItemVMs.Count, workAreaId);

            // Step 5: Return result
            return Ok(ApiResponse<object>.SuccessResponse(workItemVMs, $"{workItemVMs.Count} records of tasks fetched successfully", 200));
        }

        #endregion

        #region =================================================================== Project Infrastructre Manage APIs ===================================================================

        [HttpPost("task")]
        public async Task<IActionResult> CreateProjectTask(List<WorkItemDot> workItemDtos)
        {
            _logger.LogInfo("CreateProjectTask called with {Count} items", workItemDtos?.Count ?? 0);

            // Validate request
            if (workItemDtos == null || !workItemDtos.Any())
            {
                _logger.LogWarning("No work items provided in the request.");
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid details.", "Work Item details are not valid.", 400));
            }

            var workItemsToCreate = new List<WorkItem>();
            var workItemsToUpdate = new List<WorkItem>();
            var responseList = new List<WorkItemVM>();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            string message = "";
            List<Guid> workAreaIds = new List<Guid>();
            var workItemIds = workItemDtos.Where(wi => wi.Id != null && wi.Id != Guid.Empty).Select(wi => wi.Id).ToList();
            var workItems = await _context.WorkItems.AsNoTracking().Where(wi => workItemIds.Contains(wi.Id)).ToListAsync();

            foreach (var itemDto in workItemDtos)
            {
                var workItem = itemDto.ToWorkItemFromWorkItemDto(tenantId);
                var workArea = await _context.WorkAreas.Include(a => a.Floor).FirstOrDefaultAsync(a => a.Id == workItem.WorkAreaId) ?? new WorkArea();

                Building building = await _context.Buildings.FirstOrDefaultAsync(b => b.Id == (workArea.Floor != null ? workArea.Floor.BuildingId : Guid.Empty)) ?? new Building();

                if (itemDto.Id != null && itemDto.Id != Guid.Empty)
                {
                    // Update existing
                    workItemsToUpdate.Add(workItem);
                    message = $"Task Updated in Building: {building.Name}, on Floor: {workArea.Floor?.FloorName}, in Area: {workArea.AreaName} by {LoggedInEmployee.FirstName} {LoggedInEmployee.LastName}";
                    var existingWorkItem = workItems.FirstOrDefault(wi => wi.Id == workItem.Id);
                    double plannedWork = 0;
                    double completedWork = 0;
                    if (existingWorkItem != null)
                    {
                        if (existingWorkItem.PlannedWork != workItem.PlannedWork && existingWorkItem.CompletedWork != workItem.CompletedWork)
                        {
                            plannedWork = workItem.PlannedWork - existingWorkItem.PlannedWork;
                            completedWork = workItem.CompletedWork - existingWorkItem.CompletedWork;
                        }
                        else if (existingWorkItem.PlannedWork == workItem.PlannedWork && existingWorkItem.CompletedWork != workItem.CompletedWork)
                        {
                            plannedWork = 0;
                            completedWork = workItem.CompletedWork - existingWorkItem.CompletedWork;
                        }
                        else if (existingWorkItem.PlannedWork != workItem.PlannedWork && existingWorkItem.CompletedWork == workItem.CompletedWork)
                        {
                            plannedWork = workItem.PlannedWork - existingWorkItem.PlannedWork;
                            completedWork = 0;
                        }
                        await _cache.UpdatePlannedAndCompleteWorksInBuilding(workArea.Id, plannedWork, completedWork);
                    }
                }
                else
                {
                    // Create new
                    workItem.Id = Guid.NewGuid();
                    workItemsToCreate.Add(workItem);
                    message = $"Task Added in Building: {building.Name}, on Floor: {workArea.Floor?.FloorName}, in Area: {workArea.AreaName} by {LoggedInEmployee.FirstName} {LoggedInEmployee.LastName}";
                    await _cache.UpdatePlannedAndCompleteWorksInBuilding(workArea.Id, workItem.PlannedWork, workItem.CompletedWork);
                }

                responseList.Add(new WorkItemVM
                {
                    WorkItemId = workItem.Id,
                    WorkItem = workItem
                });
                workAreaIds.Add(workItem.WorkAreaId);

            }
            string responseMessage = "";
            // Apply DB changes
            if (workItemsToCreate.Any())
            {
                _logger.LogInfo("Adding {Count} new work items", workItemsToCreate.Count);
                await _context.WorkItems.AddRangeAsync(workItemsToCreate);
                responseMessage = "Task Added Successfully";
                await _cache.ManageWorkItemDetails(workItemsToCreate);
            }

            if (workItemsToUpdate.Any())
            {
                _logger.LogInfo("Updating {Count} existing work items", workItemsToUpdate.Count);
                _context.WorkItems.UpdateRange(workItemsToUpdate);
                responseMessage = "Task Updated Successfully";
                await _cache.ManageWorkItemDetails(workItemsToUpdate);
            }

            await _context.SaveChangesAsync();

            _logger.LogInfo("CreateProjectTask completed successfully. Created: {Created}, Updated: {Updated}", workItemsToCreate.Count, workItemsToUpdate.Count);



            var notification = new { LoggedInUserId = LoggedInEmployee.Id, Keyword = "WorkItem", WorkAreaIds = workAreaIds, Message = message };

            await _signalR.SendNotificationAsync(notification);

            return Ok(ApiResponse<object>.SuccessResponse(responseList, responseMessage, 200));
        }

        [HttpDelete("task/{id}")]
        public async Task<IActionResult> DeleteProjectTask(Guid id)
        {
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            List<Guid> workAreaIds = new List<Guid>();
            WorkItem? task = await _context.WorkItems.AsNoTracking().Include(t => t.WorkArea).FirstOrDefaultAsync(t => t.Id == id && t.TenantId == tenantId);
            if (task != null)
            {
                if (task.CompletedWork == 0)
                {
                    var assignedTask = await _context.TaskAllocations.Where(t => t.WorkItemId == id).ToListAsync();
                    if (assignedTask.Count == 0)
                    {
                        _context.WorkItems.Remove(task);
                        await _context.SaveChangesAsync();
                        _logger.LogInfo("Task with ID {WorkItemId} has been successfully deleted.", task.Id);

                        var floorId = task.WorkArea?.FloorId;
                        var floor = await _context.Floor.Include(f => f.Building).FirstOrDefaultAsync(f => f.Id == floorId);


                        workAreaIds.Add(task.WorkAreaId);
                        var projectId = floor?.Building?.ProjectId;

                        var notification = new { LoggedInUserId = LoggedInEmployee.Id, Keyword = "WorkItem", WorkAreaIds = workAreaIds, Message = $"Task Deleted in Building: {floor?.Building?.Name}, on Floor: {floor?.FloorName}, in Area: {task.WorkArea?.AreaName} by {LoggedInEmployee.FirstName} {LoggedInEmployee.LastName}" };
                        await _signalR.SendNotificationAsync(notification);
                        await _cache.DeleteWorkItemByIdAsync(task.Id);
                        if (projectId != null)
                        {
                            await _cache.DeleteProjectByIdAsync(projectId.Value);
                        }
                    }
                    else
                    {
                        _logger.LogWarning("Task with ID {WorkItemId} is currently assigned and cannot be deleted.", task.Id);
                        return BadRequest(ApiResponse<object>.ErrorResponse("Task is currently assigned and cannot be deleted.", "Task is currently assigned and cannot be deleted.", 400));
                    }
                }
                else
                {
                    double percentage = (task.CompletedWork / task.PlannedWork) * 100;
                    percentage = Math.Round(percentage, 2);
                    _logger.LogWarning("Task with ID {WorkItemId} is {CompletionPercentage}% complete and cannot be deleted", task.Id, percentage);
                    return BadRequest(ApiResponse<object>.ErrorResponse(System.String.Format("Task is {0}% complete and cannot be deleted", percentage), System.String.Format("Task is {0}% complete and cannot be deleted", percentage), 400));

                }
            }
            else
            {
                _logger.LogWarning("Task with ID {WorkItemId} not found ID database", id);
            }
            return Ok(ApiResponse<object>.SuccessResponse(new { }, "Task deleted successfully", 200));
        }

        [HttpPost("manage-infra")]
        public async Task<IActionResult> ManageProjectInfra(List<InfraDot> infraDots)
        {
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            var responseData = new InfraVM { };
            string responseMessage = "";
            string message = "";
            List<Guid> projectIds = new List<Guid>();
            if (infraDots != null)
            {
                foreach (var item in infraDots)
                {
                    if (item.Building != null)
                    {

                        Building building = item.Building.ToBuildingFromBuildingDto(tenantId);
                        building.TenantId = tenantId;

                        if (item.Building.Id == null)
                        {
                            //create
                            _context.Buildings.Add(building);
                            await _context.SaveChangesAsync();
                            responseData.building = building;
                            responseMessage = "Buliding Added Successfully";
                            message = "Building Added";
                            await _cache.AddBuildngInfra(building.ProjectId, building);
                        }
                        else
                        {
                            //update
                            _context.Buildings.Update(building);
                            await _context.SaveChangesAsync();
                            responseData.building = building;
                            responseMessage = "Buliding Updated Successfully";
                            message = "Building Updated";
                            await _cache.UpdateBuildngInfra(building.ProjectId, building);
                        }
                        projectIds.Add(building.ProjectId);
                    }
                    if (item.Floor != null)
                    {
                        Floor floor = item.Floor.ToFloorFromFloorDto(tenantId);
                        floor.TenantId = tenantId;
                        bool isCreated = false;

                        if (item.Floor.Id == null)
                        {
                            //create
                            _context.Floor.Add(floor);
                            await _context.SaveChangesAsync();
                            responseData.floor = floor;
                            responseMessage = "Floor Added Successfully";
                            message = "Floor Added";
                            isCreated = true;
                        }
                        else
                        {
                            //update
                            _context.Floor.Update(floor);
                            await _context.SaveChangesAsync();
                            responseData.floor = floor;
                            responseMessage = "Floor Updated Successfully";
                            message = "Floor Updated";
                        }
                        Building? building = await _context.Buildings.FirstOrDefaultAsync(b => b.Id == floor.BuildingId);
                        var projectId = building?.ProjectId ?? Guid.Empty;
                        projectIds.Add(projectId);
                        message = $"{message} in Building: {building?.Name}";
                        if (isCreated)
                        {
                            await _cache.AddBuildngInfra(projectId, floor: floor);
                        }
                        else
                        {
                            await _cache.UpdateBuildngInfra(projectId, floor: floor);
                        }
                    }
                    if (item.WorkArea != null)
                    {
                        WorkArea workArea = item.WorkArea.ToWorkAreaFromWorkAreaDto(tenantId);
                        workArea.TenantId = tenantId;
                        bool isCreated = false;

                        if (item.WorkArea.Id == null)
                        {
                            //create
                            _context.WorkAreas.Add(workArea);
                            await _context.SaveChangesAsync();
                            responseData.workArea = workArea;
                            responseMessage = "Work Area Added Successfully";
                            message = "Work Area Added";
                            isCreated = true;
                        }
                        else
                        {
                            //update
                            _context.WorkAreas.Update(workArea);
                            await _context.SaveChangesAsync();
                            responseData.workArea = workArea;
                            responseMessage = "Work Area Updated Successfully";
                            message = "Work Area Updated";
                        }
                        Floor? floor = await _context.Floor.Include(f => f.Building).FirstOrDefaultAsync(f => f.Id == workArea.FloorId);
                        var projectId = floor?.Building?.ProjectId ?? Guid.Empty;
                        projectIds.Add(projectId);
                        message = $"{message} in Building: {floor?.Building?.Name}, on Floor: {floor?.FloorName}";
                        if (isCreated)
                        {
                            await _cache.AddBuildngInfra(projectId, workArea: workArea, buildingId: floor?.BuildingId);
                        }
                        else
                        {
                            await _cache.UpdateBuildngInfra(projectId, workArea: workArea, buildingId: floor?.BuildingId);
                        }
                    }
                }
                message = $"{message} by {LoggedInEmployee.FirstName} {LoggedInEmployee.LastName}";
                var notification = new { LoggedInUserId = LoggedInEmployee.Id, Keyword = "Infra", ProjectIds = projectIds, Message = message };

                await _signalR.SendNotificationAsync(notification);
                return Ok(ApiResponse<object>.SuccessResponse(responseData, responseMessage, 200));
            }
            return BadRequest(ApiResponse<object>.ErrorResponse("Invalid details.", "Infra Details are not valid.", 400));

        }

        #endregion

    }
}