// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

using Microsoft.Rest.Serialization;
using System;
using System.Net.Http;
using System.Threading.Tasks;

namespace Microsoft.PowerVirtualAgents.Samples.RelayBotSample
{
    /// <summary>
    /// Bot Service class to interact with bot
    /// </summary>
    public class BotService : IBotService
    {
        private static readonly HttpClient s_httpClient = new HttpClient();

        public string BotName { get; set; }

        public string BotId { get; set; }

        public string TenantId { get; set; }

        public string TokenEndPoint { get; set; }

        public string GetBotName()
        {
            return BotName;
        }

        /// <summary>
        /// Get directline token for connecting bot
        /// </summary>
        /// <returns>directline token as string</returns>
        public async Task<string> GetTokenAsync()
        {
            string token;
            using (var httpRequest = new HttpRequestMessage())
            {
                httpRequest.Method = HttpMethod.Get;
                UriBuilder uriBuilder = new UriBuilder(TokenEndPoint);
                uriBuilder.Query = $"botId={BotId}&tenantId={TenantId}";
                httpRequest.RequestUri = uriBuilder.Uri;
                using (var response = await s_httpClient.SendAsync(httpRequest))
                {
                    var responseString = await response.Content.ReadAsStringAsync();
                    token = SafeJsonConvert.DeserializeObject<DirectLineToken>(responseString).Token;
                }
            }

            return token;
        }
    }
}