using Data.SeaHavenIndustries;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Interfaces;

namespace SeaHaven.DataServices.Implementation
{
    public class WorkOrderDataService : IWorkOrderDataService
    {
        private readonly ApplicationDbContext _context;

        public WorkOrderDataService(ApplicationDbContext context)
        {
            _context = context;
        }

        public async Task<WorkOrder?> GetByIdAsync(int id)
        {
            return await _context.workOrders.FindAsync(id);
        }

        public async Task<WorkOrder?> GetByIdWithDetailsAsync(int id)
        {
            return await _context.workOrders
                .Include(w => w.Locations)
                .Include(w => w.AssignToUser)
                .FirstOrDefaultAsync(w => w.Id == id);
        }

        public async Task<WorkOrder?> GetByInternalNumberAsync(string internalNumber)
        {
            return await _context.workOrders
                .FirstOrDefaultAsync(w => w.InternalWONumber == internalNumber);
        }

        public async Task<IEnumerable<WorkOrder>> GetAllAsync()
        {
            return await _context.workOrders.ToListAsync();
        }

        public async Task<IEnumerable<WorkOrder>> GetByLocationIdAsync(int locationId)
        {
            return await _context.workOrders
                .Where(w => w.LocationId == locationId)
                .ToListAsync();
        }

        public async Task<IEnumerable<WorkOrder>> GetByAssigneeAsync(string assignee)
        {
            return await _context.workOrders
                .Where(w => w.AssignTo == assignee)
                .ToListAsync();
        }

        public async Task<IEnumerable<WorkOrder>> GetByStatusAsync(string status)
        {
            return await _context.workOrders
                .Where(w => w.Status == status)
                .ToListAsync();
        }

        public async Task<IEnumerable<WorkOrder>> GetByPriorityAsync(string priority)
        {
            return await _context.workOrders
                .Where(w => w.Priority == priority)
                .ToListAsync();
        }

        public async Task<(IEnumerable<WorkOrder> Items, int TotalCount)> GetPagedAsync(
            int page, 
            int pageSize, 
            string? search = null, 
            string? status = null, 
            string? priority = null)
        {
            var query = _context.workOrders.AsQueryable();

            if (!string.IsNullOrWhiteSpace(search))
            {
                query = query.Where(w => 
                    w.WorkerOrderNumber!.Contains(search) || 
                    w.WorkerOrderTitle!.Contains(search));
            }

            if (!string.IsNullOrWhiteSpace(status))
            {
                query = query.Where(w => w.Status == status);
            }

            if (!string.IsNullOrWhiteSpace(priority))
            {
                query = query.Where(w => w.Priority == priority);
            }

            var totalCount = await query.CountAsync();
            var items = await query
                .OrderByDescending(w => w.CreatedDate)
                .Skip((page - 1) * pageSize)
                .Take(pageSize)
                .ToListAsync();

            return (items, totalCount);
        }

        public async Task<WorkOrder> AddAsync(WorkOrder workOrder)
        {
            workOrder.CreatedDate = DateTime.Now;
            await _context.workOrders.AddAsync(workOrder);
            await _context.SaveChangesAsync();
            return workOrder;
        }

        public async Task UpdateAsync(WorkOrder workOrder)
        {
            workOrder.LastModificationTime = DateTime.Now;
            _context.workOrders.Update(workOrder);
            await _context.SaveChangesAsync();
        }

        public async Task DeleteAsync(int id)
        {
            var entity = await GetByIdAsync(id);
            if (entity != null)
            {
                _context.workOrders.Remove(entity);
                await _context.SaveChangesAsync();
            }
        }

        public async Task<IEnumerable<WorkOrderContacts>> GetWorkOrderContactsAsync(int workOrderId)
        {
            return await _context.WorkOrderContacts
                .Where(wc => wc.WorkorderId == workOrderId)
                .ToListAsync();
        }

        public async Task<IEnumerable<WorkOrderCategories>> GetWorkOrderCategoriesAsync(int workOrderId)
        {
            return await _context.workOrderCategories
                .Where(wc => wc.WorkorderId == workOrderId)
                .ToListAsync();
        }

        public async Task<IEnumerable<WorkOrderAttachments>> GetWorkOrderAttachmentsAsync(int workOrderId)
        {
            return await _context.workOrderAttachments
                .Where(wa => wa.WorkorderId == workOrderId)
                .ToListAsync();
        }

        public async Task<IEnumerable<Comments>> GetWorkOrderCommentsAsync(int workOrderId)
        {
            return await _context.Comments
                .Where(c => c.WorkerOrderId == workOrderId)
                .ToListAsync();
        }

        public async Task<bool> ExistsAsync(int id)
        {
            return await _context.workOrders.AnyAsync(w => w.Id == id);
        }

        public async Task<bool> InternalNumberExistsAsync(string internalNumber, int? excludeId = null)
        {
            return await _context.workOrders.AnyAsync(w =>
                w.InternalWONumber == internalNumber &&
                (excludeId == null || w.Id != excludeId));
        }

        public async Task<string> GenerateNextInternalWONumberAsync()
        {
            return await Task.FromResult($"WO-{DateTime.Now:yyyyMMdd}-{new Random().Next(1000, 9999)}");
        }

        public async Task<int> CountAsync()
        {
            return await _context.workOrders.CountAsync();
        }

        public async Task<int> CountByStatusAsync(string status)
        {
            return await _context.workOrders.CountAsync(w => w.Status == status);
        }

        public async Task<int> CountByLocationAsync(int locationId)
        {
            return await _context.workOrders.CountAsync(w => w.LocationId == locationId);
        }
    }
}