using FrameworkDAL.DTO.MessageHub.MessageHubGenerator;
using GB5Shared.DTO.Framework.Login;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkBLL.MessageHub.MessageHubPlatforms
{
    /// <summary>
    /// Postman Platform
    /// ----------------
    /// ✔ Internal / Debug mode platform
    /// ✔ Supports Template and Non-Template (Conversation) messages
    /// ✔ Logs all messages for testing
    /// </summary>
    public class PostmanPlatform : IMessageHubPlatform.IPostmanPlatform
    {
        private readonly ILogger<PostmanPlatform> _logger;

        public PostmanPlatform(ILogger<PostmanPlatform> logger)
        {
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
        }

        // ==========================================================
        // ✅ TEMPLATE VERSION (Postman Template Engine)
        // ==========================================================
        public Task<MessageHubResponseDTO> SendPostmanTemplate(
            MessageHubDTO dto,
            LoginDTO login,
            CancellationToken ct)
        {
            if (dto == null) throw new ArgumentNullException(nameof(dto));
            if (login == null) throw new ArgumentNullException(nameof(login));

            var timestamp = DateTime.UtcNow;

            _logger.LogInformation("[{Time}] POSTMAN TEMPLATE - MESSAGE", timestamp);
            _logger.LogInformation("Recipient : {Recipient}", dto.Recipient);
            _logger.LogInformation("Message   : {Message}", dto.MessageText);
            _logger.LogInformation("Sent By   : {UserName} ({UserId})", login.UserName, login.UserId);

            var responseObject = new
            {
                Mode = "Template",
                Recipient = dto.Recipient,
                Message = dto.MessageText,
                SentBy = login.UserName,
                ClientId = login.ClientId,
                UserId = login.UserId,
                Time = timestamp
            };

            _logger.LogInformation(
                "Postman Template message prepared successfully | Recipient={Recipient} | User={UserName}",
                dto.Recipient, login.UserName);

            return Task.FromResult(new MessageHubResponseDTO
            {
                Success = true,
                Message = "Postman Template message processed successfully",
                ResponseData = JsonConvert.SerializeObject(responseObject)
            });
        }

        // ==========================================================
        // ✅ NON-TEMPLATE VERSION (Postman Conversation Engine)
        // ==========================================================
        public Task<MessageHubResponseDTO> SendPostmanConversation(
            MessageHubDTO dto,
            LoginDTO login,
            CancellationToken ct)
        {
            if (dto == null) throw new ArgumentNullException(nameof(dto));
            if (login == null) throw new ArgumentNullException(nameof(login));

            var timestamp = DateTime.UtcNow;

            _logger.LogInformation("[{Time}] POSTMAN CONVERSATION - MESSAGE", timestamp);
            _logger.LogInformation("Recipient : {Recipient}", dto.Recipient);
            _logger.LogInformation("Message   : {Message}", dto.MessageText);
            _logger.LogInformation("Sent By   : {UserName} ({UserId})", login.UserName, login.UserId);

            var responseObject = new
            {
                Mode = "NonTemplate",
                Recipient = dto.Recipient,
                Message = dto.MessageText,
                SentBy = login.UserName,
                ClientId = login.ClientId,
                UserId = login.UserId,
                Time = timestamp
            };

            _logger.LogInformation(
                "Postman Conversation message prepared successfully | Recipient={Recipient} | User={UserName}",
                dto.Recipient, login.UserName);

            return Task.FromResult(new MessageHubResponseDTO
            {
                Success = true,
                Message = "Postman Conversation message processed successfully",
                ResponseData = JsonConvert.SerializeObject(responseObject)
            });
        }
    }
}