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

namespace SeaHaven.DataServices.Implementation
{
    public class WorkOrderAuditDataService : IWorkOrderAuditDataService
    {
        private readonly ApplicationDbContext _context;

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

        public void EnqueueAuditLog(WorkOrderAuditLog auditLog)
        {
            _context.WorkOrderAuditLogs.Add(auditLog);
        }

        public async Task PersistAsync(CancellationToken cancellationToken)
        {
            try
            {
                await _context.SaveChangesAsync(cancellationToken);
            }
            catch (DbUpdateException ex) when (IsUniqueConstraintViolation(ex))
            {
                foreach (var entry in ex.Entries.Where(e => e.Entity is WorkOrderFieldLock))
                    entry.State = EntityState.Detached;

                await _context.SaveChangesAsync(cancellationToken);
            }
        }

        private static bool IsUniqueConstraintViolation(DbUpdateException ex)
        {
            var message = ex.InnerException?.Message ?? ex.Message;
            return message.Contains("duplicate", StringComparison.OrdinalIgnoreCase)
                || message.Contains("UNIQUE", StringComparison.OrdinalIgnoreCase);
        }
    }
}