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

namespace SeaHaven.DataServices.Implementation
{
    public class WorkOrderIngestDataService : IWorkOrderIngestDataService
    {
        private readonly ApplicationDbContext _context;

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

        public async Task<int> GetMaxWorkOrderIdAsync(CancellationToken cancellationToken)
            => await _context.workOrders.MaxAsync(w => (int?)w.Id, cancellationToken) ?? 0;

        public Task<WorkOrder?> GetTrackedByExternalIdAsync(string externalWorkOrderId, CancellationToken cancellationToken)
            => _context.workOrders.FirstOrDefaultAsync(w => w.ExternalWorkOrderId == externalWorkOrderId, cancellationToken);

        public void TrackWorkOrder(WorkOrder workOrder)
            => _context.workOrders.Add(workOrder);

        public Task<Locations?> FindLocationAsync(string name, CancellationToken cancellationToken)
            => _context.Locations.FirstOrDefaultAsync(l => l.Name == name || l.Title == name, cancellationToken);

        public async Task AddAndSaveLocationAsync(Locations location, CancellationToken cancellationToken)
        {
            _context.Locations.Add(location);
            await _context.SaveChangesAsync(cancellationToken);
        }

        public Task<int> StageCancelPendingUpliftsAsync(int workOrderId, CancellationToken cancellationToken)
            => PendingUpliftCancellation.StageAsync(
                _context,
                workOrderId,
                actorId: null,
                actorType: AuditActorType.Sync.ToString(),
                DateTime.UtcNow,
                cancellationToken);

        public async Task<IReadOnlyList<int>> GetWorkOrderIdsByExternalIdsAsync(
            IReadOnlyCollection<string> externalWorkOrderIds,
            CancellationToken cancellationToken)
            => await _context.workOrders
                .AsNoTracking()
                .Where(w => w.ExternalWorkOrderId != null && externalWorkOrderIds.Contains(w.ExternalWorkOrderId))
                .Select(w => w.Id)
                .ToListAsync(cancellationToken);

        public Task ExecuteTransactionalAsync(
            IReadOnlyCollection<int> lockedWorkOrderIds,
            Func<CancellationToken, Task> work,
            CancellationToken cancellationToken)
            => WorkOrderMutationLock.RunManyAsync(
                _context,
                lockedWorkOrderIds,
                async ct =>
                {
                    await work(ct);
                    return true;
                },
                cancellationToken);

        public Task SaveAsync(CancellationToken cancellationToken)
            => _context.SaveChangesAsync(cancellationToken);
    }
}