using FrameworkDAL.DTO.MessageHub.MessageHubGenerator;
using GB5Shared.DTO.Framework.Login;
using Microsoft.Extensions.Options;
using Newtonsoft.Json;
using System;
using System.Net.Http;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkBLL.MessageHub.MessageHubPlatforms
{
    public class TeamsPlatform : IMessageHubPlatform.ITeamsPlatform
    {
        private readonly IHttpClientFactory _httpClientFactory;
        private readonly MessageHubSettings _settings;

        public TeamsPlatform(
            IHttpClientFactory httpClientFactory,
            IOptions<MessageHubSettings> settings)
        {
            _httpClientFactory = httpClientFactory ?? throw new ArgumentNullException(nameof(httpClientFactory));
            _settings = settings?.Value ?? throw new ArgumentNullException(nameof(settings));
        }

        // ==========================================================
        // ✅ TEMPLATE - Teams MessageHubEngine
        // ==========================================================
        public async Task<MessageHubResponseDTO> SendTeamsTemplate(
            MessageHubDTO dto,
            LoginDTO login,
            CancellationToken ct)
        {
            if (dto == null) return Fail("Template DTO cannot be null");
            if (login == null) return Fail("Login info missing");

            var payload = new
            {
                text = $"📢 TEMPLATE MESSAGE\n\n{dto.MessageText}\n\nSent By: {login.UserName}"
            };

            try
            {
                var client = _httpClientFactory.CreateClient();
                var response = await client.PostAsync(
                    _settings.Teams.WebhookUrl,
                    new StringContent(JsonConvert.SerializeObject(payload), Encoding.UTF8, "application/json"),
                    ct);

                var responseContent = await response.Content.ReadAsStringAsync(ct);

                return new MessageHubResponseDTO
                {
                    Success = response.IsSuccessStatusCode,
                    Message = response.IsSuccessStatusCode
                        ? "Teams Template message sent successfully"
                        : "Teams Template message failed",
                    ResponseData = responseContent
                };
            }
            catch (Exception ex)
            {
                return Fail(ex.Message);
            }
        }

        // ==========================================================
        // ✅ CONVERSATION - Teams MessageHubConversation
        // ==========================================================
        public async Task<MessageHubResponseDTO> SendTeamsConversation(
            MessageHubDTO dto,
            LoginDTO login,
            CancellationToken ct)
        {
            if (dto == null) return Fail("Conversation DTO cannot be null");
            if (login == null) return Fail("Login info missing");

            var payload = new
            {
                text = dto.MessageText // Pure conversation text
            };

            try
            {
                var client = _httpClientFactory.CreateClient();
                var response = await client.PostAsync(
                    _settings.Teams.WebhookUrl,
                    new StringContent(JsonConvert.SerializeObject(payload), Encoding.UTF8, "application/json"),
                    ct);

                var responseContent = await response.Content.ReadAsStringAsync(ct);

                return new MessageHubResponseDTO
                {
                    Success = response.IsSuccessStatusCode,
                    Message = response.IsSuccessStatusCode
                        ? "Teams Conversation message sent successfully"
                        : "Teams Conversation message failed",
                    ResponseData = responseContent
                };
            }
            catch (Exception ex)
            {
                return Fail(ex.Message);
            }
        }

        // ==========================================================
        // PRIVATE HELPER
        // ==========================================================
        private static MessageHubResponseDTO Fail(string reason)
            => new() { Success = false, Message = reason };
    }
}