using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Security.Cryptography;
using System.Text;
using DamageAssesment.Api.UsersAccess.Db;
using DamageAssesment.Api.UsersAccess.Interfaces;
using DamageAssesment.Api.UsersAccess.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

public class TokenServiceProvider : ITokenServiceProvider
{
    private readonly UsersAccessDbContext usersAccessDbContext;
    private readonly JwtSettings jwtSettings;
    public TokenServiceProvider(IOptions<JwtSettings> options,UsersAccessDbContext usersAccessDbContext)
    {
        this.usersAccessDbContext = usersAccessDbContext;
        this.jwtSettings = options.Value;
    }
    public async Task<string> GenerateToken(DamageAssesment.Api.UsersAccess.Models.User user)
    {
        var randomnumber = new byte[32];
        using (var ramdomnumbergenerator = RandomNumberGenerator.Create())
        {
             ramdomnumbergenerator.GetBytes(randomnumber);
             string refreshtoken = Convert.ToBase64String(randomnumber);
             var token = await usersAccessDbContext.Tokens.FirstOrDefaultAsync(item => item.UserId == user.Id);
             if (token != null)
             {
                 token.RefreshToken = refreshtoken;
             }
             else
             {
                 usersAccessDbContext.Tokens.Add(new DamageAssesment.Api.UsersAccess.Db.Token()
                 {
                     Id = new Random().Next().ToString(),
                     UserId = user.Id,
                     RefreshToken = refreshtoken,
                     IsActive = true
                 });
             }
             await usersAccessDbContext.SaveChangesAsync();

             return refreshtoken;
        }
    }

    public async Task<TokenResponse> TokenAuthenticate(DamageAssesment.Api.UsersAccess.Models.User user, Claim[] claims)
    {
        var token = new JwtSecurityToken(claims: claims, expires: DateTime.Now.AddSeconds(20),
          signingCredentials: new SigningCredentials(new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtSettings.securitykey)), SecurityAlgorithms.HmacSha256)
        );
        var jwttoken = new JwtSecurityTokenHandler().WriteToken(token);
        return new TokenResponse() { jwttoken = jwttoken, refreshtoken = await GenerateToken(user) };
    }
}