using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Renis.Database.Models;
using Renis.Repositories;

namespace renis_backend.Services.Cars
{
    public class CarsService : ICarsService
    {
        private readonly ICarRepository _carsRepository;
        private readonly ILogger<CarsService> _logger;
        public CarsService( ICarRepository carsRepository, ILogger<CarsService> logger)
        {
            _carsRepository = carsRepository;
            _logger = logger;
        }
        public async Task<Car> GenerateCar(Renis.Database.Models.Polis polis, User user)
        {
            try
            {
                if(await _carsRepository.AddCar(new Car()
                {
                    PolisId = polis.Id,
                    RespId = user.Id,
                    Verified = false,
                    Polis = polis,
                    Resp = user,
                    Number = GenerateRussianCarNumber()

                }))
                {
                    return await _carsRepository.GetCarByNumber(GenerateRussianCarNumber());
                }
                throw new Exception("Car not created");
            }
            catch(Exception ex)
            {
                _logger.LogError(ex.Message);
                throw;
            }
        }
        private string GenerateRussianCarNumber()
        {
            string letters = "АВЕКМНОРСТУХ";
            string numbers = "0123456789";
            string regionCode = new string(Enumerable.Repeat(numbers, 2).Select(c => c[new Random().Next(c.Length)]).ToArray());
            string series = new string(Enumerable.Repeat(letters, 3).Select(c => c[new Random().Next(c.Length)]).ToArray());
            string number = new string(Enumerable.Repeat(numbers, 3).Select(c => c[new Random().Next(c.Length)]).ToArray());
            return $"{series} {number} {regionCode}";
        }
        
    }
}