using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Threading.Tasks;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;

namespace Win_in.Sfs.Wms.DataExchange.Authenticaitons;

public class TokenService : ITokenService
{
    private readonly IConfiguration _configuration;
    private readonly AuthenticationOptions _options;

    public TokenService(IConfiguration configuration, IOptions<AuthenticationOptions> options)
    {
        _configuration = configuration;
        _options = options.Value;
    }

    public async Task<BaererToken> GetTokenAsync(string baseUrl)
    {
        var options = _options;
        var token = await GetTokenAsync(baseUrl, options).ConfigureAwait(false);
        return token;
    }

    public async Task<BaererToken> GetTokenAsync(string baseUrl, string username, string password)
    {
        var options = new AuthenticationOptions()
        {
            client_id = _options.client_id,
            client_secret = _options.client_secret,
            grant_type = "password",
            username = username,
            password = password
        };
        var token = await GetTokenAsync(baseUrl, options).ConfigureAwait(false);
        return token;
    }

    private static async Task<BaererToken> GetTokenAsync(string baseUrl, AuthenticationOptions options)
    {
        const string routeString = "connect/token";
        var client = new HttpClient();
        client.BaseAddress = new Uri(baseUrl);
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        var content = new FormUrlEncodedContent(new[]
        {
            new KeyValuePair<string, string>("client_id",options.client_id),
            new KeyValuePair<string, string>("client_secret",options.client_secret),
            new KeyValuePair<string, string>("grant_type",options.grant_type),
            new KeyValuePair<string, string>("username",options.username),
            new KeyValuePair<string, string>("password",options.password),
        });

        var response = await client.PostAsync(routeString, content).ConfigureAwait(false);
        response.EnsureSuccessStatusCode();

        var dto = await response.Content.ReadFromJsonAsync<BaererToken>().ConfigureAwait(false);
        return dto;
    }
}