using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;
using Faker;
using Renis.Database.Models;
using Renis.Repositories;
using Renis.Services.Jwt;
using renis_backend.DTO;
using renis_backend.Exceptions.User;
namespace renis_backend.Services.Users
{
    public class UserService : IUserService
    {
        private readonly ILogger<UserService> _logger;
        private readonly IUserRepository _userRepository;
        private readonly IJwtService _jwtService;
        public UserService( ILogger<UserService> logger, IUserRepository userRepository, IJwtService jwtService)
        {
            _logger = logger;
            _userRepository = userRepository;
            _jwtService = jwtService;
        }


        public async Task<User> GetUserAsync(string phone)
        {
            try
            {
                var user = await _userRepository.GetUserByPhone(phone);
                if(user == null)
                {
                    throw new UserException("User not found");
                }
                return user;
            }
            catch (Exception ex)
            {
                _logger.LogError(ex.Message);
                if(ex is UserException)
                {
                    throw;
                }
                throw new UserException(ex.Message);
            }
        }
        public async Task<string> GenerateUser()
        {
            try
            {
                
                string firstName = russianFirstNames[random.Next(0, russianFirstNames.Length)];
                string lastName = russianLastNames[random.Next(0, russianLastNames.Length)];
                string patronymic = russianPatronymics[random.Next(0, russianPatronymics.Length)];
                string name = $"{lastName} {firstName} {patronymic}";
                string phone = GenerateRussianPhoneNumber();
                string password = new string(Enumerable.Repeat("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ", 10).Select(c => c[random.Next(c.Length)]).ToArray());

       
                var user = new User
                {
                    Name = name,
                    Phone = GenerateRussianPhoneNumber(),
                    Password = password
                };
                if(await _userRepository.AddUser(user))
                {
                    return _jwtService.GenerateAccessToken(user);
                }
                throw new UserException("User already exists");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex.Message);
                if(ex is UserException)
                {
                    throw;
                }
                throw new UserException(ex.Message);
            }
        }
            
        private static Random random = new Random();
        private static string[] russianFirstNames = new string[]
        {
            "Иван", "Петр", "Алексей", "Дмитрий", "Николай", "Сергей", "Александр", "Михаил", "Андрей", "Владимир"
        };

        private static string[] russianLastNames = new string[]
        {
            "Иванов", "Петров", "Сидоров", "Кузнецов", "Попов", "Смирнов", "Николаев", "Зайцев", "Павлов", "Михайлов"
        };

        private static string[] russianPatronymics = new string[]
        {
            "Иванович", "Петрович", "Алексеевич", "Дмитриевич", "Николаевич", "Сергеевич", "Александрович", "Михайлович", "Андреевич", "Владимирович"
        };

        private static string[] russianPhonePrefixes = new string[]
        {
            "+7", "+375", "+380", "+7"
        };

        private static string GenerateRussianPhoneNumber()
        {
            string prefix = russianPhonePrefixes[random.Next(0, russianPhonePrefixes.Length)];
            string number = new string(Enumerable.Repeat("0123456789", 10).Select(c => c[random.Next(c.Length)]).ToArray());
            return $"{prefix}{number}";
        }
    }
}