using Microsoft.EntityFrameworkCore;
using PARR.DAL.Services.Interfaces.Job;
using PARR.DAL.Services.Interfaces.Unit;

namespace PARR.TemplateGeneratorWorker.Services
{
    internal class ValidatorService : IValidatorService
    {
        private readonly IServiceProvider serviceProvider;
        private readonly ILogger<ValidatorService> logger;

        public ValidatorService(
            IServiceProvider serviceProvider,
            ILogger<ValidatorService> logger
            )
        {
            this.serviceProvider = serviceProvider;
            this.logger = logger;
        }


        public async Task<bool> IsValidAsync(Guid jobId, Guid unitId)
        {
            using (var scope = serviceProvider.CreateScope())
            {
                var jobService = GetServiceInScope<IJobService>(scope);
                var job = await jobService
                                    .Get().AsNoTracking()
                                    .FirstOrDefaultAsync(t => t.Id == jobId);

                if (job == null)
                {
                    logger.LogError($"Не найдена регалментная работа {nameof(jobId)}: {jobId}");
                    return false;
                }

                var unitService = GetServiceInScope<IUnitService>(scope);
                var unit = await unitService
                    .Get().AsNoTracking()
                    .FirstOrDefaultAsync(t => t.Id == unitId);

                if (unit == null)
                {
                    logger.LogError($"Не найден элемент конфигурации {nameof(unitId)}: {unitId}");
                    return false;
                }

                return true;
            }
        }


        private Service GetServiceInScope<Service>(IServiceScope scope)
        {
            var service = scope.ServiceProvider.GetService<Service>();
            if (service == null)
                throw new Exception($"Не найден сервис: {nameof(Service)}");

            return service;
        }
    }
}