using Marco.Pms.DataAccess.Data;
using Marco.Pms.Model.Directory;
using Marco.Pms.Model.Dtos.Master;
using Marco.Pms.Model.Mapper;
using Marco.Pms.Model.Utilities;
using Marco.Pms.Model.ViewModels.Master;
using MarcoBMS.Services.Helpers;
using MarcoBMS.Services.Service;
using Microsoft.EntityFrameworkCore;

namespace Marco.Pms.Services.Helpers
{
    public class MasterHelper
    {
        private readonly ApplicationDbContext _context;
        private readonly ILoggingService _logger;
        private readonly UserHelper _userHelper;


        public MasterHelper(ApplicationDbContext context, ILoggingService logger, UserHelper userHelper)
        {
            _context = context;
            _logger = logger;
            _userHelper = userHelper;
        }
        // -------------------------------- Contact Category  --------------------------------
        public async Task<ApiResponse<object>> CreateContactCategory(CreateContactCategoryDto contactCategoryDto)
        {
            Guid tenantId = _userHelper.GetTenantId();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            if (contactCategoryDto != null)
            {
                ContactCategoryMaster? existingContactCategory = await _context.ContactCategoryMasters.FirstOrDefaultAsync(c => c.TenantId == tenantId && c.Name.ToLower() == (contactCategoryDto.Name != null ? contactCategoryDto.Name.ToLower() : ""));
                if (existingContactCategory == null)
                {
                    ContactCategoryMaster contactCategory = contactCategoryDto.ToContactCategoryMasterFromCreateContactCategoryDto(tenantId);
                    _context.ContactCategoryMasters.Add(contactCategory);
                    await _context.SaveChangesAsync();
                    ContactCategoryVM categoryVM = contactCategory.ToContactCategoryVMFromContactCategoryMaster();

                    _logger.LogInfo("Employee ID {LoggedInEmployeeId} created a contact category {ContactCategoryId}.", LoggedInEmployee.Id, contactCategory.Id);
                    return ApiResponse<object>.SuccessResponse(categoryVM, "Category Created Successfully", 200);
                }
                _logger.LogWarning("Employee ID {LoggedInEmployeeId} attempted to create an existing contact category.", LoggedInEmployee.Id);
                return ApiResponse<object>.ErrorResponse("Category already existed", "Category already existed", 409);
            }
            _logger.LogWarning("Employee with ID {LoggedInEmployeeId} sended empty payload", LoggedInEmployee.Id);
            return ApiResponse<object>.ErrorResponse("User Send empty Payload", "User Send empty Payload", 400);
        }
        public async Task<ApiResponse<object>> GetContactCategoriesList()
        {
            Guid tenantId = _userHelper.GetTenantId();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            var categoryList = await _context.ContactCategoryMasters.Where(c => c.TenantId == tenantId).ToListAsync();
            List<ContactCategoryVM> contactCategories = new List<ContactCategoryVM>();
            foreach (var category in categoryList)
            {
                ContactCategoryVM categoryVM = category.ToContactCategoryVMFromContactCategoryMaster();
                contactCategories.Add(categoryVM);
            }
            _logger.LogInfo("{count} contact categoires are fetched by Employee with ID {LoggedInEmployeeId}", contactCategories.Count, LoggedInEmployee.Id);
            return ApiResponse<object>.SuccessResponse(contactCategories, System.String.Format("{0} contact categories fetched successfully", contactCategories.Count), 200);
        }
        public async Task<ApiResponse<object>> GetContactCategoryById(Guid id)
        {
            Guid tenantId = _userHelper.GetTenantId();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            var category = await _context.ContactCategoryMasters.FirstOrDefaultAsync(c => c.Id == id && c.TenantId == tenantId);
            if (category != null)
            {
                ContactCategoryVM categoryVM = category.ToContactCategoryVMFromContactCategoryMaster();
                _logger.LogInfo("Employee {EmployeeId} fetched contact category {ContactCategoryID}", LoggedInEmployee.Id, category.Id);
                return ApiResponse<object>.SuccessResponse(categoryVM, "Category fetched successfully", 200);
            }

            _logger.LogWarning("Employee {EmployeeId} attempted to fetch contact category {ContactCategoryID} but not found in database", LoggedInEmployee.Id, id);
            return ApiResponse<object>.ErrorResponse("Category not found", "Category not found", 404);
        }
        public async Task<ApiResponse<object>> DeleteContactCategory(Guid id)
        {
            Guid tenantId = _userHelper.GetTenantId();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            ContactCategoryMaster? contactCategory = await _context.ContactCategoryMasters.FirstOrDefaultAsync(c => c.Id == id && c.TenantId == tenantId);
            if (contactCategory != null)
            {
                List<Contact>? existingContacts = await _context.Contacts.AsNoTracking().Where(c => c.ContactCategoryId == contactCategory.Id).ToListAsync();
                if (existingContacts.Count > 0)
                {
                    List<Contact>? contacts = new List<Contact>();
                    foreach (var contact in existingContacts)
                    {
                        contact.ContactCategoryId = null;
                        contacts.Add(contact);
                    }
                    _context.Contacts.UpdateRange(contacts);
                }
                _context.ContactCategoryMasters.Remove(contactCategory);

                _context.DirectoryUpdateLogs.Add(new DirectoryUpdateLog
                {
                    RefereanceId = id,
                    UpdatedById = LoggedInEmployee.Id,
                    UpdateAt = DateTime.UtcNow
                });
                await _context.SaveChangesAsync();
                _logger.LogInfo("Employee {EmployeeId} deleted contact category {ContactCategoryId}", LoggedInEmployee.Id, id);
            }

            _logger.LogWarning("Employee {EmployeeId} tries to delete Category {CategoryId} but not found in database", LoggedInEmployee.Id, id);
            return ApiResponse<object>.SuccessResponse(new { }, "Category deleted successfully", 200);
        }

        // -------------------------------- Contact Tag  --------------------------------


        public async Task<ApiResponse<Object>> GetContactTags()
        {
            Guid tenantId = _userHelper.GetTenantId();

            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();

            var taglist = await _context.ContactTagMasters.Where(t => t.TenantId == tenantId).ToListAsync();
            List<ContactTagVM> contactTags = new List<ContactTagVM>();
            foreach (var tag in taglist)
            {
                ContactTagVM tagVm = tag.ToContactTagVMFromContactTagMaster();
                contactTags.Add(tagVm);
            }
            _logger.LogInfo("{count} contact Tags are fetched by Employee with ID {LoggedInEmployeeId}", contactTags.Count, LoggedInEmployee.Id);
            return ApiResponse<object>.SuccessResponse(contactTags, System.String.Format("{0} contact tags fetched successfully", contactTags.Count), 200);
        }
        public async Task<ApiResponse<object>> CreateContactTag(CreateContactTagDto contactTagDto)
        {
            Guid tenantId = _userHelper.GetTenantId();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            if (contactTagDto != null)
            {
                ContactTagMaster? existingContactTag = await _context.ContactTagMasters.FirstOrDefaultAsync(c => c.TenantId == tenantId && c.Name.ToLower() == (contactTagDto.Name != null ? contactTagDto.Name.ToLower() : ""));
                if (existingContactTag == null)
                {
                    ContactTagMaster contactTag = contactTagDto.ToContactTagMasterFromCreateContactTagDto(tenantId);
                    _context.ContactTagMasters.Add(contactTag);
                    await _context.SaveChangesAsync();
                    ContactTagVM tagVM = contactTag.ToContactTagVMFromContactTagMaster();

                    _logger.LogInfo("Employee ID {LoggedInEmployeeId} created a contact tag {ContactTagId}.", LoggedInEmployee.Id, contactTag.Id);
                    return ApiResponse<object>.SuccessResponse(tagVM, "Tag Created Successfully", 200);
                }
                _logger.LogWarning("Employee ID {LoggedInEmployeeId} attempted to create an existing contact tag.", LoggedInEmployee.Id);
                return ApiResponse<object>.ErrorResponse("Tag already existed", "Tag already existed", 409);
            }
            _logger.LogWarning("Employee with ID {LoggedInEmployeeId} sended empty payload", LoggedInEmployee.Id);
            return ApiResponse<object>.ErrorResponse("User Send empty Payload", "User Send empty Payload", 400);
        }
        public async Task<ApiResponse<object>> DeleteContactTag(Guid id)
        {
            Guid tenantId = _userHelper.GetTenantId();
            var LoggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
            ContactTagMaster? contactTag = await _context.ContactTagMasters.FirstOrDefaultAsync(c => c.Id == id && c.TenantId == tenantId);
            if (contactTag != null)
            {
                List<ContactTagMapping>? tagMappings = await _context.ContactTagMappings.Where(t => t.ContactTagtId == contactTag.Id).ToListAsync();

                _context.ContactTagMasters.Remove(contactTag);
                if (tagMappings.Any())
                {
                    _context.ContactTagMappings.RemoveRange(tagMappings);
                }
                _context.DirectoryUpdateLogs.Add(new DirectoryUpdateLog
                {
                    RefereanceId = id,
                    UpdatedById = LoggedInEmployee.Id,
                    UpdateAt = DateTime.UtcNow
                });
                await _context.SaveChangesAsync();
                _logger.LogInfo("Employee {EmployeeId} deleted contact tag {ContactTagId}", LoggedInEmployee.Id, id);
            }

            _logger.LogWarning("Employee {EmployeeId} tries to delete Tag {ContactTagId} but not found in database", LoggedInEmployee.Id, id);
            return ApiResponse<object>.SuccessResponse(new { }, "Tag deleted successfully", 200);
        }

    }
}